Coastal Waters Forecast
Issued by NWS Boston, MA
Issued by NWS Boston, MA
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357 FZUS51 KBOX 092003 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 403 PM EDT Sun Aug 9 2026 Coastal waters from the Merrimack River MA to Watch Hill RI out to 60 NM ANZ200-100900- 403 PM EDT Sun Aug 9 2026 .Synopsis for Massachusetts and Rhode Island coastal waters... A weak cold front crosses the waters tonight and then lifts N across the region as a warm front on Mon. This will be followed by a stronger cold front Mon night into early Tue followed by high pres for the middle of the week. This high moves east of the region Wed night with the next cold frontal passage sometime Thu into Thu evening. A ridge of high pres then builds in from the west Fri into Sat. $$ ANZ250-100900- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 403 PM EDT Sun Aug 9 2026 .TONIGHT...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 1 foot at 3 seconds and SE 1 foot at 8 seconds. .MON...W winds around 5 kt, becoming S in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: SW 1 foot at 3 seconds and SE 1 foot at 8 seconds, becoming S 1 foot at 3 seconds and SE 1 foot at 8 seconds. .MON NIGHT...S winds 10 to 15 kt, becoming SW after midnight. Gusts up to 20 kt. Seas around 2 ft. Wave Detail: S 2 ft at 3 seconds and E 1 foot at 8 seconds. .TUE...W winds 5 to 10 kt. Gusts up to 20 kt in the morning. Seas around 2 ft. Wave Detail: W 2 ft at 4 seconds and SE 1 foot at 9 seconds. .TUE NIGHT...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 1 foot at 4 seconds and SE 1 foot at 10 seconds. .WED AND WED NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 9 seconds and NW 1 foot at 4 seconds. .THU AND THU NIGHT...SW winds 5 to 10 kt, becoming W 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. .FRI AND FRI NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-100900- Massachusetts Bay and Ipswich Bay- 403 PM EDT Sun Aug 9 2026 .TONIGHT...W winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: W 1 foot at 2 seconds and E 1 foot at 9 seconds. .MON...W winds around 5 kt, becoming SE in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: W 1 foot at 2 seconds and E 1 foot at 9 seconds, becoming SE 1 foot at 3 seconds and E 1 foot at 8 seconds. .MON NIGHT...SW winds around 10 kt, becoming W after midnight. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: S 1 foot at 3 seconds and E 1 foot at 8 seconds, becoming SW 1 foot at 3 seconds and E 1 foot at 8 seconds. .TUE...W winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: W 1 foot at 3 seconds and E 1 foot at 9 seconds. .TUE NIGHT...NW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: W 1 foot at 2 seconds and E 1 foot at 9 seconds. .WED...W winds around 5 kt, becoming SE in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: NW 1 foot at 2 seconds and E 1 foot at 9 seconds, becoming SW 1 foot at 2 seconds and E 1 foot at 8 seconds. .WED NIGHT...S winds 5 to 10 kt. Seas around 2 ft in the evening, then 1 foot or less. A chance of showers after midnight. .THU AND THU NIGHT...SW winds 5 to 10 kt, becoming W. Seas around 2 ft. A chance of showers. .FRI AND FRI NIGHT...NW winds 5 to 10 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ231-100900- Cape Cod Bay- 403 PM EDT Sun Aug 9 2026 .TONIGHT...W winds 5 to 10 kt. Seas around 2 ft this evening, then 1 foot or less. Wave Detail: W 1 foot at 2 seconds and E 1 foot at 8 seconds, becoming W 1 foot at 3 seconds and SE 1 foot at 9 seconds. .MON...W winds around 5 kt, becoming S with gusts up to 20 kt in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: W 1 foot at 3 seconds and SE 1 foot at 8 seconds, becoming SW 1 foot at 3 seconds and SE 1 foot at 8 seconds. .MON NIGHT...SW winds around 10 kt. Gusts up to 20 kt in the evening. Seas around 2 ft. Wave Detail: SW 1 foot at 2 seconds and E 1 foot at 9 seconds. .TUE...W winds 5 to 10 kt. Seas around 2 ft in the morning, then 1 foot or less. Wave Detail: W 1 foot at 2 seconds and E 1 foot at 10 seconds, becoming W 1 foot at 3 seconds and E 1 foot at 9 seconds. .TUE NIGHT...NW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: W 1 foot at 2 seconds and E 1 foot at 8 seconds. .WED AND WED NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: NW 1 foot at 3 seconds and NE 1 foot at 8 seconds. .THU AND THU NIGHT...SW winds 5 to 10 kt, becoming W. Gusts up to 20 kt. Seas around 2 ft. A chance of showers. .FRI AND FRI NIGHT...NW winds 5 to 10 kt. Gusts up to 20 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-100900- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 NM- 403 PM EDT Sun Aug 9 2026 .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming W 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 6 seconds and E 1 foot at 9 seconds. .MON...W winds around 5 kt, becoming S in the afternoon. Seas 2 to 3 ft. Wave Detail: S 2 ft at 6 seconds and E 1 foot at 9 seconds. Patchy fog in the afternoon with vsby 1 NM or less. .MON NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 5 seconds and E 1 foot at 8 seconds. Patchy fog. Vsby 1 NM or less. .TUE...W winds 10 to 15 kt, diminishing to 5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: W 3 ft at 6 seconds and E 1 foot at 9 seconds. .TUE NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas 2 to 3 ft. Wave Detail: W 2 ft at 5 seconds and E 1 foot at 9 seconds. .WED AND WED NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 5 seconds and E 2 ft at 9 seconds. .THU AND THU NIGHT...SW winds 10 to 15 kt, becoming W. Gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. .FRI AND FRI NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ255-100900- Coastal Waters extending out to 25 NM South of Marthas Vineyard and Nantucket- 403 PM EDT Sun Aug 9 2026 .TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 6 seconds and E 1 foot at 9 seconds. Patchy fog after midnight with vsby 1 to 3 NM. .MON...SW winds around 5 kt, increasing to 5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 6 seconds and E 1 foot at 9 seconds. .MON NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: S 3 ft at 6 seconds and E 1 foot at 8 seconds. Patchy fog. Vsby 1 NM or less. .TUE...W winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 6 seconds and E 1 foot at 9 seconds. Patchy fog in the morning with vsby 1 to 3 NM. .TUE NIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming NW 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 6 seconds and E 1 foot at 9 seconds. .WED...NW winds around 5 kt, becoming SW in the afternoon. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 6 seconds and E 1 foot at 9 seconds. .WED NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers after midnight. .THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. A chance of showers. .THU NIGHT...W winds around 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. A chance of showers. .FRI AND FRI NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-100900- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 NM South of Block Island- 403 PM EDT Sun Aug 9 2026 .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming NW 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 6 seconds and E 1 foot at 9 seconds. .MON...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 6 seconds and E 1 foot at 9 seconds. .MON NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 3 ft. Wave Detail: S 3 ft at 7 seconds and E 1 foot at 9 seconds. Patchy fog. Vsby 1 NM or less. .TUE...W winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas around 3 ft. Wave Detail: SW 3 ft at 6 seconds and SE 1 foot at 9 seconds. .TUE NIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming NW 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 6 seconds and SE 1 foot at 9 seconds. .WED...NW winds around 5 kt, becoming SW in the afternoon. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 6 seconds and SE 1 foot at 9 seconds. .WED NIGHT...SW winds around 10 kt. Seas 2 to 3 ft. A chance of showers after midnight. .THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. .THU NIGHT THROUGH FRI NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ232-100900- Nantucket Sound- 403 PM EDT Sun Aug 9 2026 .TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas around 2 ft. Wave Detail: W 2 ft at 4 seconds and SE 1 foot at 8 seconds. .MON...W winds around 5 kt, becoming SW in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 6 seconds and E 1 foot at 9 seconds. .MON NIGHT...SW winds 10 to 15 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at 8 seconds. .TUE...W winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: W 2 ft at 4 seconds and E 1 foot at 8 seconds. .TUE NIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming NW 5 to 10 kt after midnight. Seas around 2 ft. Wave Detail: W 2 ft at 4 seconds and E 1 foot at 9 seconds. .WED AND WED NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 1 foot at 5 seconds and E 1 foot at 9 seconds. .THU AND THU NIGHT...SW winds 10 to 15 kt, becoming W. Gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. .FRI AND FRI NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-100900- Vineyard Sound- 403 PM EDT Sun Aug 9 2026 .TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 6 seconds and SE 1 foot at 7 seconds. .MON...W winds around 5 kt, becoming SW 10 to 15 kt in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 6 seconds and E 1 foot at 10 seconds. .MON NIGHT...SW winds 10 to 15 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 6 seconds and SE 1 foot at 9 seconds. .TUE...W winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 6 seconds and SE 1 foot at 9 seconds. .TUE NIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming NW 5 to 10 kt after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 6 seconds and SE 1 foot at 11 seconds. .WED...NW winds around 5 kt, becoming SW in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 6 seconds and SE 1 foot at 13 seconds. .WED NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. A chance of showers after midnight. .THU AND THU NIGHT...SW winds 10 to 15 kt, becoming W. Gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. .FRI AND FRI NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ234-100900- Buzzards Bay- 403 PM EDT Sun Aug 9 2026 .TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming NW around 5 kt after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 6 seconds and SE 1 foot at 8 seconds. .MON...W winds around 5 kt, becoming SW 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 6 seconds and SE 1 foot at 10 seconds. .MON NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and SE 2 ft at 9 seconds. .TUE...W winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and SE 1 foot at 10 seconds. .TUE NIGHT...W winds 10 to 15 kt, becoming NW 5 to 10 kt after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and SE 1 foot at 11 seconds. .WED...NW winds around 5 kt, becoming S 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 6 seconds and SE 1 foot at 13 seconds. .WED NIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas around 2 ft. A chance of showers after midnight. .THU AND THU NIGHT...SW winds 10 to 15 kt, becoming W. Gusts up to 25 kt. Seas 2 to 4 ft. A chance of showers. .FRI AND FRI NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-100900- Rhode Island Sound- 403 PM EDT Sun Aug 9 2026 .TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming NW 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds. .MON...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 6 seconds and SE 1 foot at 10 seconds. .MON NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and SE 3 ft at 10 seconds. Patchy fog in the evening with vsby 1 NM or less. .TUE...W winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 6 seconds and SE 1 foot at 10 seconds. .TUE NIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming NW 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 6 seconds and SE 1 foot at 10 seconds. .WED...N winds around 5 kt, becoming S in the afternoon. Seas around 2 ft. Wave Detail: S 2 ft at 6 seconds and SE 1 foot at 14 seconds. .WED NIGHT...SW winds around 10 kt. Seas around 2 ft. A chance of showers after midnight. .THU AND THU NIGHT...SW winds 10 to 15 kt, becoming W. Gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. .FRI AND FRI NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ237-100900- Block Island Sound- 403 PM EDT Sun Aug 9 2026 .TONIGHT...W winds 10 to 15 kt, becoming NW around 5 kt after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 6 seconds and SE 1 foot at 8 seconds. .MON...W winds around 5 kt, becoming SW in the afternoon. Seas around 2 ft. Wave Detail: S 2 ft at 6 seconds and SE 1 foot at 9 seconds. .MON NIGHT...SW winds around 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and SE 1 foot at 9 seconds. .TUE...W winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 6 seconds and SE 1 foot at 9 seconds. .TUE NIGHT...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 2 ft at 5 seconds and SE 1 foot at 10 seconds. .WED...NE winds around 5 kt, becoming S in the afternoon. Seas around 2 ft. Wave Detail: S 2 ft at 6 seconds and SE 1 foot at 10 seconds. .WED NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. A chance of showers after midnight. .THU AND THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming NW. Seas 2 to 3 ft. A chance of showers. .FRI AND FRI NIGHT...NW winds 10 to 15 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-100900- Boston Harbor- 403 PM EDT Sun Aug 9 2026 .TONIGHT...W winds 5 to 10 kt. Waves around 2 ft this evening, then 1 foot or less. .MON...W winds around 5 kt, becoming SE in the afternoon. Waves 1 foot or less. .MON NIGHT...SW winds around 10 kt. Waves around 2 ft in the evening, then 1 foot or less. .TUE...W winds around 10 kt. Waves 1 foot or less, then around 2 ft in the afternoon. .TUE NIGHT...NW winds 5 to 10 kt. Waves 1 foot or less. .WED...W winds around 5 kt, becoming SE in the afternoon. Waves 1 foot or less. .WED NIGHT...S winds 5 to 10 kt. Waves 1 foot or less. A chance of showers after midnight. .THU AND THU NIGHT...SW winds 5 to 10 kt, becoming W. Waves around 2 ft. A chance of showers. .FRI AND FRI NIGHT...NW winds around 10 kt. Gusts up to 20 kt. Waves around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ236-100900- Narragansett Bay- 403 PM EDT Sun Aug 9 2026 .TONIGHT...W winds 5 to 10 kt. Waves around 2 ft. .MON...W winds around 5 kt, becoming S 10 to 15 kt in the afternoon. Waves around 2 ft. .MON NIGHT...SW winds around 10 kt, becoming W after midnight. Waves around 2 ft. .TUE...W winds 5 to 10 kt. Waves around 2 ft. .TUE NIGHT...NW winds 5 to 10 kt. Waves around 2 ft. .WED...NW winds around 5 kt, becoming S in the afternoon. Waves around 2 ft. .WED NIGHT...SW winds 5 to 10 kt. Waves around 2 ft. A chance of showers after midnight. .THU AND THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming W. Waves around 2 ft. A chance of showers. .FRI AND FRI NIGHT...NW winds 5 to 10 kt. Gusts up to 20 kt. Waves around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ280-100900- Ocean Waters from the Merrimack River to Plymouth from 40 to 60 NM- 403 PM EDT Sun Aug 9 2026 .TONIGHT...SW winds around 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: W 2 ft at 6 seconds and E 1 foot at 9 seconds. .MON...NW winds around 5 kt, becoming S in the afternoon. Seas around 2 ft. Wave Detail: S 2 ft at 6 seconds and E 1 foot at 9 seconds. .MON NIGHT...S winds 10 to 15 kt, becoming SW after midnight. Gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 5 seconds and E 1 foot at 9 seconds. Patchy fog after midnight with vsby 1 NM or less. .TUE...W winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: W 3 ft at 5 seconds and SE 1 foot at 10 seconds. .TUE NIGHT...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 2 ft at 5 seconds and SE 1 foot at 10 seconds. .WED AND WED NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 5 seconds and E 2 ft at 10 seconds. .THU AND THU NIGHT...SW winds around 10 kt, becoming W. Gusts up to 25 kt. Seas 2 to 3 ft. A chance of showers. .FRI AND FRI NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ281-100900- Ocean Waters from Provincetown to Nantucket from 20 to 60 NM- 403 PM EDT Sun Aug 9 2026 .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming W 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 6 seconds and E 1 foot at 9 seconds. Patchy fog after midnight with vsby 1 NM or less. .MON...W winds around 5 kt, becoming SW in the afternoon. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 6 seconds and E 1 foot at 8 seconds. Patchy fog in the afternoon with vsby 1 NM or less. .MON NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 6 seconds and E 1 foot at 9 seconds. Patchy fog. Vsby 1 NM or less. .TUE...W winds 10 to 15 kt. Gusts up to 20 kt in the morning. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 6 seconds and E 1 foot at 9 seconds. Patchy fog in the morning with vsby 1 to 3 NM. .TUE NIGHT...W winds around 10 kt, becoming NW after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 6 seconds and E 1 foot at 9 seconds. .WED AND WED NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: W 3 ft at 6 seconds and E 2 ft at 10 seconds. .THU AND THU NIGHT...SW winds 10 to 15 kt, becoming W. Gusts up to 20 kt. Seas 3 to 4 ft. A chance of showers. .FRI AND FRI NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ282-100900- Ocean Waters from Marthas Vineyard to Nantucket from 25 to 60 NM- 403 PM EDT Sun Aug 9 2026 .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming W 5 to 10 kt after midnight. Seas 3 to 4 ft. Wave Detail: SW 4 ft at 6 seconds and E 1 foot at 9 seconds. Patchy fog after midnight with vsby 1 to 3 NM. .MON...SW winds around 5 kt, increasing to 5 to 10 kt in the afternoon. Seas around 3 ft. Wave Detail: SW 3 ft at 6 seconds and E 1 foot at 9 seconds. .MON NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 3 ft. Wave Detail: S 3 ft at 6 seconds and E 1 foot at 8 seconds. Patchy fog. Vsby 1 NM or less. .TUE...W winds 10 to 15 kt with gusts up to 20 kt. Seas around 3 ft. Wave Detail: SW 3 ft at 6 seconds and E 1 foot at 9 seconds. Patchy fog in the morning with vsby 1 to 3 NM. .TUE NIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming NW 5 to 10 kt after midnight. Seas around 3 ft. Wave Detail: SW 3 ft at 6 seconds and E 1 foot at 9 seconds. .WED...N winds around 5 kt, becoming S in the afternoon. Seas around 3 ft. Wave Detail: SW 3 ft at 6 seconds and E 1 foot at 9 seconds. .WED NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers after midnight. .THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. A chance of showers. .THU NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. A chance of showers. .FRI AND FRI NIGHT...NW winds 10 to 15 kt. Seas 3 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ283-100900- Ocean Waters from Montauk NY to Marthas Vineyard from 25 to 60 NM- 403 PM EDT Sun Aug 9 2026 .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming W 5 to 10 kt after midnight. Seas 3 to 4 ft. Wave Detail: SW 3 ft at 6 seconds and E 1 foot at 9 seconds. .MON...SW winds around 5 kt, increasing to 5 to 10 kt in the afternoon. Seas around 3 ft. Wave Detail: S 3 ft at 6 seconds and E 1 foot at 9 seconds. .MON NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 3 ft. Wave Detail: S 3 ft at 7 seconds and E 1 foot at 9 seconds. Patchy fog. Vsby 1 NM or less. .TUE...W winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas around 3 ft. Wave Detail: SW 3 ft at 6 seconds and SE 1 foot at 9 seconds. .TUE NIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming NW 5 to 10 kt after midnight. Seas around 3 ft. Wave Detail: SW 3 ft at 6 seconds and SE 1 foot at 9 seconds. .WED...NW winds around 5 kt, becoming SW in the afternoon. Seas around 3 ft. Wave Detail: SW 3 ft at 6 seconds and E 1 foot at 9 seconds. .WED NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers after midnight. .THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. A chance of showers. .THU NIGHT THROUGH FRI NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ For the latest updates...please visit our webpage at www.weather.gov/boston You can follow us on Facebook at www.facebook.com/us.nationalweatherservice.boston.gov You can follow us on Twitter at @NWSBoston