Coastal Waters Forecast
Issued by NWS Boston, MA
Issued by NWS Boston, MA
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654 FZUS51 KBOX 131705 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 105 PM EDT Thu Aug 13 2026 Coastal waters from the Merrimack River MA to Watch Hill RI out to 60 NM ANZ200-140600- 105 PM EDT Thu Aug 13 2026 .Synopsis for Massachusetts and Rhode Island coastal waters... Weak frontal boundaries will traverse the coastal waters through Fri, with little impact outside of scattered showers and thunderstorms. During this time, winds and seas will remain below advisory criteria. This weekend, brief high pres builds in from the NW, followed by low pres moving out of the northern Great Lakes late Sun into Mon, bringing a return to unsettled conditions. $$ ANZ250-140600- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 105 PM EDT Thu Aug 13 2026 .THIS AFTERNOON...SW winds around 5 kt. Seas around 2 ft. Wave Detail: SE 1 foot at 3 seconds and W 1 foot at 3 seconds. A chance of showers. .TONIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: NW 2 ft at 3 seconds and SE 1 foot at 3 seconds. .FRI...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N 2 ft at 3 seconds and S 1 foot at 4 seconds. .FRI NIGHT...W winds 5 to 10 kt, becoming N after midnight. Seas around 2 ft. Wave Detail: N 1 foot at 3 seconds and S 1 foot at 4 seconds. .SAT...N winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N 2 ft at 4 seconds and S 1 foot at 5 seconds. .SAT NIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas around 2 ft. Wave Detail: S 1 foot at 3 seconds and W 1 foot at 3 seconds. .SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .SUN NIGHT AND MON...S winds around 15 kt, becoming NW. Gusts up to 25 kt. Seas 2 to 3 ft. Showers likely. .MON NIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-140600- Massachusetts Bay and Ipswich Bay- 105 PM EDT Thu Aug 13 2026 .THIS AFTERNOON...S winds around 5 kt. Seas 1 foot or less. Wave Detail: W 1 foot at 2 seconds and SE 1 foot at 3 seconds. A slight chance of showers. .TONIGHT...NW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: W 1 foot at 2 seconds and SE 1 foot at 3 seconds. .FRI...NW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: N 1 foot at 3 seconds and SW 1 foot at 3 seconds. .FRI NIGHT...NW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: N 1 foot at 3 seconds and SW 1 foot at 3 seconds. .SAT...N winds 5 to 10 kt, becoming E in the afternoon. Seas 1 foot or less. Wave Detail: N 1 foot at 3 seconds and SW 1 foot at 3 seconds. .SAT NIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas 1 foot or less. Wave Detail: W 1 foot at 2 seconds and SE 1 foot at 2 seconds. .SUN...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .SUN NIGHT AND MON...S winds 10 to 15 kt, becoming NW. Gusts up to 20 kt. Seas 2 to 3 ft. Showers likely. .MON 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. $$ ANZ231-140600- Cape Cod Bay- 105 PM EDT Thu Aug 13 2026 .THIS AFTERNOON...SW winds around 5 kt. Seas 1 foot or less. Wave Detail: SW 1 foot at 2 seconds and E 1 foot at 3 seconds. A chance of showers. .TONIGHT...W winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft after midnight. Wave Detail: W 1 foot at 2 seconds and S 1 foot at 3 seconds, becoming E 1 foot at 2 seconds and NW 1 foot at 2 seconds. .FRI...N winds 5 to 10 kt. Seas around 2 ft in the morning, then 1 foot or less. Wave Detail: N 1 foot at 3 seconds and S 1 foot at 5 seconds, becoming N 1 foot at 3 seconds and SW 1 foot at 6 seconds. .FRI NIGHT...SW winds around 5 kt, becoming N after midnight. Seas 1 foot or less, then around 2 ft after midnight. Wave Detail: N 1 foot at 3 seconds and S 1 foot at 5 seconds. .SAT...N winds 5 to 10 kt. Seas around 2 ft in the morning, then 1 foot or less. Wave Detail: N 1 foot at 3 seconds and S 1 foot at 6 seconds, becoming N 1 foot at 4 seconds and S 1 foot at 8 seconds. .SAT NIGHT...S winds around 5 kt, becoming SW around 5 kt after midnight. Seas 1 foot or less. Wave Detail: N 1 foot at 4 seconds and S 1 foot at 5 seconds. .SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .SUN NIGHT AND MON...SW winds 10 to 15 kt, becoming NW. Gusts up to 25 kt. Seas 2 to 4 ft. Showers. .MON NIGHT...NW winds 5 to 10 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-140600- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 NM- 105 PM EDT Thu Aug 13 2026 .THIS AFTERNOON...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 4 seconds and NW 1 foot at 3 seconds. A chance of showers. .TONIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: NW 2 ft at 3 seconds and S 2 ft at 5 seconds. .FRI...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N 2 ft at 3 seconds and S 2 ft at 5 seconds. .FRI NIGHT...SW winds around 5 kt, becoming N after midnight. Seas around 2 ft. Wave Detail: NW 1 foot at 4 seconds and S 1 foot at 5 seconds. .SAT...N winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N 2 ft at 4 seconds and S 1 foot at 6 seconds. .SAT NIGHT...W winds around 5 kt, becoming SW after midnight. Seas around 2 ft. Wave Detail: NW 2 ft at 4 seconds and S 1 foot at 6 seconds. .SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .SUN NIGHT...S winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Showers likely. .MON...W winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Showers likely. .MON 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. $$ ANZ255-140600- Coastal Waters extending out to 25 NM South of Marthas Vineyard and Nantucket- 105 PM EDT Thu Aug 13 2026 .THIS AFTERNOON...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at 8 seconds. A slight chance of showers. .TONIGHT...W winds around 10 kt, becoming NW after midnight. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 5 seconds and E 1 foot at 4 seconds. .FRI...N winds 5 to 10 kt, becoming W in the afternoon. Seas 2 to 3 ft. Wave Detail: N 2 ft at 4 seconds and SW 2 ft at 5 seconds. .FRI NIGHT...SW winds 5 to 10 kt, becoming N 10 to 15 kt after midnight. Seas around 2 ft. Wave Detail: N 1 foot at 3 seconds and W 1 foot at 3 seconds. .SAT...N winds 10 to 15 kt, diminishing to 5 to 10 kt in the afternoon. Seas around 2 ft. Wave Detail: N 2 ft at 3 seconds and S 1 foot at 6 seconds. .SAT NIGHT...E winds around 5 kt, becoming SW after midnight. Seas around 2 ft. Wave Detail: NW 1 foot at 3 seconds and NE 1 foot at 4 seconds. .SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .SUN NIGHT AND MON...SW winds 20 to 25 kt. Seas 3 to 5 ft. Showers. .MON NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-140600- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 NM South of Block Island- 105 PM EDT Thu Aug 13 2026 .THIS AFTERNOON...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 5 seconds and W 1 foot at 4 seconds. .TONIGHT...W winds 10 to 15 kt, becoming NW after midnight. Seas 2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and NE 1 foot at 5 seconds. .FRI...N winds 5 to 10 kt, becoming W in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and N 1 foot at 3 seconds. .FRI NIGHT...W winds 5 to 10 kt, becoming N 10 to 15 kt after midnight. Seas around 2 ft. Wave Detail: N 2 ft at 3 seconds and SW 2 ft at 5 seconds. .SAT...N winds 10 to 15 kt, becoming NW 5 to 10 kt in the afternoon. Seas around 2 ft. Wave Detail: N 2 ft at 3 seconds and S 1 foot at 6 seconds. .SAT NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NE 1 foot at 3 seconds and W 1 foot at 3 seconds. .SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .SUN NIGHT...SW winds 20 to 25 kt. Seas 3 to 5 ft. Showers. .MON...W winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 5 ft. Showers likely. .MON NIGHT...NW winds 10 to 15 kt. Seas 3 to 5 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. $$ ANZ232-140600- Nantucket Sound- 105 PM EDT Thu Aug 13 2026 .THIS AFTERNOON...SW winds 10 to 15 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at 8 seconds. A chance of showers. .TONIGHT...W winds around 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: E 1 foot at 4 seconds and SW 1 foot at 4 seconds. .FRI...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N 1 foot at 3 seconds and SW 1 foot at 5 seconds. .FRI NIGHT...SW winds 5 to 10 kt, becoming N after midnight. Seas 1 foot or less, then around 2 ft after midnight. Wave Detail: W 1 foot at 2 seconds and NE 1 foot at 3 seconds, becoming N 1 foot at 3 seconds and SW 1 foot at 5 seconds. .SAT...N winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N 1 foot at 3 seconds and S 1 foot at 5 seconds. .SAT NIGHT...SE winds around 5 kt, becoming SW after midnight. Seas 1 foot or less. Wave Detail: NW 1 foot at 2 seconds and NE 1 foot at 3 seconds. .SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .SUN NIGHT AND MON...SW winds 20 to 25 kt with gusts up to 30 kt. Seas 2 to 3 ft. Showers. .MON NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-140600- Vineyard Sound- 105 PM EDT Thu Aug 13 2026 .THIS AFTERNOON...SW winds 10 to 15 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at 9 seconds. A slight chance of showers. .TONIGHT...W winds around 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: W 2 ft at 4 seconds and NE 1 foot at 4 seconds. .FRI...N winds 5 to 10 kt, becoming W in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and N 1 foot at 3 seconds. .FRI NIGHT...W winds 5 to 10 kt, becoming N after midnight. Seas around 2 ft. Wave Detail: NE 1 foot at 3 seconds and SW 1 foot at 4 seconds. .SAT...N winds 5 to 10 kt, becoming NE in the afternoon. Seas around 2 ft in the morning, then 1 foot or less. Wave Detail: N 1 foot at 3 seconds and SW 1 foot at 5 seconds, becoming N 1 foot at 2 seconds and S 1 foot at 6 seconds. .SAT NIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas 1 foot or less. Wave Detail: NE 1 foot at 2 seconds and SW 1 foot at 4 seconds. .SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .SUN NIGHT AND MON...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Showers. .MON 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. $$ ANZ234-140600- Buzzards Bay- 105 PM EDT Thu Aug 13 2026 .THIS AFTERNOON...SW winds around 10 kt. Seas around 2 ft. Wave Detail: W 1 foot at 3 seconds and S 1 foot at 4 seconds. A slight chance of showers. .TONIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: E 1 foot at 4 seconds and SW 1 foot at 5 seconds, becoming N 1 foot at 3 seconds and SW 1 foot at 5 seconds. .FRI...NW winds 5 to 10 kt, becoming W in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: N 1 foot at 3 seconds and SW 1 foot at 5 seconds, becoming NW 1 foot at 3 seconds and SW 1 foot at 5 seconds. .FRI NIGHT...W winds 5 to 10 kt, becoming N after midnight. Seas 1 foot or less. Wave Detail: N 1 foot at 3 seconds and SW 1 foot at 4 seconds. .SAT...N winds 5 to 10 kt, becoming NE in the afternoon. Seas 1 foot or less. Wave Detail: N 1 foot at 3 seconds and SW 1 foot at 4 seconds. .SAT NIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas 1 foot or less. Wave Detail: NE 1 foot at 2 seconds and W 1 foot at 4 seconds. .SUN...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 3 ft. .SUN NIGHT AND MON...SW winds 20 to 25 kt, becoming W. Seas 2 to 4 ft. Showers. .MON NIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-140600- Rhode Island Sound- 105 PM EDT Thu Aug 13 2026 .THIS AFTERNOON...SW winds 10 to 15 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at 8 seconds. A slight chance of showers. .TONIGHT...W winds around 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and E 1 foot at 4 seconds. .FRI...N winds 5 to 10 kt, becoming SW in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and N 1 foot at 2 seconds. .FRI NIGHT...W winds 5 to 10 kt, becoming N 10 to 15 kt after midnight. Seas around 2 ft. Wave Detail: N 2 ft at 3 seconds and SW 2 ft at 4 seconds. .SAT...N winds 10 to 15 kt, becoming NW 5 to 10 kt in the afternoon. Seas around 2 ft. Wave Detail: N 2 ft at 3 seconds and S 1 foot at 6 seconds. .SAT NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NE 1 foot at 2 seconds and W 1 foot at 2 seconds. .SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .SUN NIGHT AND MON...SW winds 20 to 25 kt, becoming W 15 to 20 kt. Seas 3 to 5 ft. Showers. .MON NIGHT...NW winds 10 to 15 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. $$ ANZ237-140600- Block Island Sound- 105 PM EDT Thu Aug 13 2026 .THIS AFTERNOON...SW winds around 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at 8 seconds. .TONIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and NE 1 foot at 4 seconds. .FRI...N winds 5 to 10 kt, becoming SW in the afternoon. Seas around 2 ft. Wave Detail: N 1 foot at 2 seconds and S 1 foot at 5 seconds. .FRI NIGHT...W winds 5 to 10 kt, becoming N after midnight. Seas around 2 ft. Wave Detail: W 1 foot at 2 seconds and S 1 foot at 5 seconds. .SAT AND SAT NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N 1 foot at 3 seconds and S 1 foot at 6 seconds. .SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 3 seconds and SW 2 ft at 3 seconds. .SUN NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Showers likely. .MON...W winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 4 ft. Showers likely. .MON NIGHT...NW winds 5 to 10 kt. Seas 2 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-140600- Boston Harbor- 105 PM EDT Thu Aug 13 2026 .THIS AFTERNOON...SW winds around 5 kt. Waves 1 foot or less. A slight chance of showers. .TONIGHT...NW winds 5 to 10 kt. Waves 1 foot or less. .FRI...NW winds 5 to 10 kt. Waves 1 foot or less. .FRI NIGHT...NW winds 5 to 10 kt. Waves 1 foot or less. .SAT...N winds 5 to 10 kt, becoming E in the afternoon. Waves 1 foot or less. .SAT NIGHT...S winds around 5 kt, becoming SW after midnight. Waves 1 foot or less. .SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. .SUN NIGHT AND MON...SW winds 10 to 15 kt, becoming NW. Gusts up to 20 kt. Waves around 2 ft. Showers likely. .MON NIGHT...N winds around 5 kt. Waves 1 foot or less. 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. $$ ANZ236-140600- Narragansett Bay- 105 PM EDT Thu Aug 13 2026 .THIS AFTERNOON...SW winds 5 to 10 kt. Waves around 2 ft. A slight chance of showers. .TONIGHT...W winds 5 to 10 kt, becoming NW after midnight. Waves around 2 ft in the evening, then 1 foot or less. .FRI...N winds 5 to 10 kt, becoming W in the afternoon. Waves 1 foot or less. .FRI NIGHT...NW winds 5 to 10 kt, becoming N after midnight. Waves 1 foot or less. .SAT...N winds 5 to 10 kt. Waves 1 foot or less. .SAT NIGHT...SW winds 5 to 10 kt. Waves 1 foot or less. .SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft. .SUN NIGHT...SW winds 15 to 20 kt. Waves 2 to 3 ft. Showers likely. .MON...W winds 15 to 20 kt. Waves 2 to 3 ft. Showers likely. .MON NIGHT...NW winds 5 to 10 kt. Waves 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ280-140600- Ocean Waters from the Merrimack River to Plymouth from 40 to 60 NM- 105 PM EDT Thu Aug 13 2026 .THIS AFTERNOON...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 4 seconds and W 1 foot at 3 seconds. A slight chance of showers. .TONIGHT...W winds 5 to 10 kt, becoming NW 10 to 15 kt with gusts up to 20 kt after midnight. Seas around 2 ft. Wave Detail: NW 2 ft at 3 seconds and SE 2 ft at 4 seconds. .FRI...NW winds 10 to 15 kt with gusts up to 20 kt, becoming W 5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: N 2 ft at 4 seconds and S 1 foot at 6 seconds. .FRI NIGHT...W winds 5 to 10 kt, becoming N 10 to 15 kt with gusts up to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: N 2 ft at 4 seconds and S 1 foot at 6 seconds. .SAT...N 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: N 2 ft at 4 seconds and S 1 foot at 6 seconds. .SAT NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NW 2 ft at 4 seconds and S 1 foot at 6 seconds. .SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .SUN NIGHT...S winds 15 to 20 kt with gusts up to 30 kt. Seas around 3 ft. Showers likely. .MON...W winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 4 ft. A chance of showers. .MON NIGHT...NW winds around 10 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. $$ ANZ281-140600- Ocean Waters from Provincetown to Nantucket from 20 to 60 NM- 105 PM EDT Thu Aug 13 2026 .THIS AFTERNOON...SW winds around 10 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 6 seconds and NW 1 foot at 3 seconds. A chance of showers. .TONIGHT...SW winds 5 to 10 kt, becoming NW with gusts up to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 6 seconds and NW 2 ft at 3 seconds. Patchy fog. Vsby 1 to 3 NM, decreasing to 1 NM or less after midnight. .FRI...NW winds 5 to 10 kt. Gusts up to 20 kt in the morning. Seas 2 to 3 ft. Wave Detail: N 2 ft at 4 seconds and SW 2 ft at 6 seconds. .FRI NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas 2 to 3 ft. Wave Detail: N 2 ft at 4 seconds and S 1 foot at 5 seconds. .SAT...N winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: N 2 ft at 4 seconds and S 1 foot at 6 seconds. .SAT NIGHT...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NW 2 ft at 5 seconds and S 1 foot at 6 seconds. .SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .SUN NIGHT...S winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. Showers likely. .MON...SW winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 6 ft. Showers likely. .MON NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 5 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ282-140600- Ocean Waters from Marthas Vineyard to Nantucket from 25 to 60 NM- 105 PM EDT Thu Aug 13 2026 .THIS AFTERNOON...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: W 3 ft at 4 seconds and SE 1 foot at 9 seconds. A slight chance of showers. .TONIGHT...W winds around 10 kt, becoming NW after midnight. Seas around 3 ft. Wave Detail: SW 3 ft at 5 seconds and SE 1 foot at 10 seconds. .FRI...NW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 4 seconds and S 2 ft at 6 seconds. .FRI NIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: NW 1 foot at 4 seconds and SW 1 foot at 5 seconds. .SAT...N winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: N 2 ft at 4 seconds and S 1 foot at 6 seconds. .SAT NIGHT...NE winds around 5 kt, becoming W after midnight. Seas around 2 ft. Wave Detail: N 2 ft at 5 seconds and S 1 foot at 6 seconds. .SUN...SW winds 5 to 10 kt. Seas 2 to 3 ft. .SUN NIGHT...S winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. Showers likely. .MON...SW winds 15 to 20 kt with gusts up to 30 kt. Seas 5 to 7 ft. Showers likely. .MON NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 5 ft. A chance of showers. 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. $$ ANZ283-140600- Ocean Waters from Montauk NY to Marthas Vineyard from 25 to 60 NM- 105 PM EDT Thu Aug 13 2026 .THIS AFTERNOON...SW winds 10 to 15 kt. Seas around 3 ft. Wave Detail: W 3 ft at 5 seconds and E 1 foot at 8 seconds. A slight chance of showers. .TONIGHT...W winds 10 to 15 kt, becoming NW after midnight. Seas 2 to 3 ft. Wave Detail: W 3 ft at 5 seconds and E 1 foot at 10 seconds. .FRI...N winds 5 to 10 kt, becoming NW in the afternoon. Seas 2 to 3 ft. Wave Detail: N 2 ft at 4 seconds and SW 1 foot at 5 seconds. .FRI NIGHT...W winds 5 to 10 kt, becoming N 10 to 15 kt after midnight. Seas 2 to 3 ft. Wave Detail: N 3 ft at 4 seconds and SW 1 foot at 6 seconds. .SAT...N winds 10 to 15 kt, diminishing to 5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: N 3 ft at 4 seconds and S 1 foot at 6 seconds. .SAT NIGHT...E winds around 5 kt, becoming SW after midnight. Seas around 2 ft. Wave Detail: N 1 foot at 4 seconds and S 1 foot at 7 seconds. .SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .SUN NIGHT AND MON...SW winds 20 to 25 kt, becoming W. Gusts up to 30 kt. Seas 4 to 6 ft. Showers. .MON NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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