Coastal Waters Forecast
Issued by NWS Boston, MA
Issued by NWS Boston, MA
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305 FZUS51 KBOX 282003 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 403 PM EDT Tue Jul 28 2026 Coastal waters from the Merrimack River MA to Watch Hill RI out to 60 NM ANZ200-290900- 403 PM EDT Tue Jul 28 2026 .Synopsis for Massachusetts and Rhode Island coastal waters... Rough seas develop tonight and continue through Friday as low pressure approaches from the west and brings periodic chances for showers and perhaps thunderstorms. Winds will initially be southerly/southeasterly through the overnight, before turning more northeast Wednesday through Friday. Rough seas should start to diminish heading into the back half of the week. $$ ANZ250-290900- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 403 PM EDT Tue Jul 28 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 AM EDT WEDNESDAY THROUGH THURSDAY MORNING... .TONIGHT...SE winds 10 to 15 kt. Gusts up to 20 kt this evening. Seas 2 to 4 ft. Wave Detail: S 2 ft at 4 seconds and SE 2 ft at 8 seconds. .WED...SE winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: SE 3 ft at 4 seconds and SE 3 ft at 8 seconds. A chance of showers in the afternoon. .WED NIGHT...E winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 5 seconds. A chance of showers in the evening. Showers after midnight. .THU...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at 7 seconds and E 2 ft at 4 seconds. Showers likely. .THU NIGHT...N winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: NE 4 ft at 7 seconds and NE 1 foot at 3 seconds. A chance of showers. .FRI AND FRI NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: N 4 ft at 6 seconds. .SAT THROUGH SUN...S winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .SUN NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-290900- Massachusetts Bay and Ipswich Bay- 403 PM EDT Tue Jul 28 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 AM EDT WEDNESDAY THROUGH WEDNESDAY EVENING... .TONIGHT...SE winds 10 to 15 kt. Gusts up to 20 kt this evening. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 4 seconds and E 2 ft at 7 seconds. .WED...SE winds 10 to 15 kt, becoming E 15 to 20 kt in the afternoon. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: E 4 ft at 7 seconds and SE 3 ft at 4 seconds. A chance of showers in the afternoon. .WED NIGHT...E winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 5 seconds. Showers. .THU...NE winds 15 to 20 kt with gusts up to 30 kt. Seas around 3 ft. Wave Detail: E 3 ft at 5 seconds. Showers. .THU NIGHT...N winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. Wave Detail: NE 3 ft at 6 seconds. Showers likely in the evening. A chance of showers after midnight. .FRI AND FRI NIGHT...NW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: NW 3 ft at 5 seconds and NE 3 ft at 7 seconds. .SAT THROUGH SUN...S winds 5 to 10 kt. Seas around 2 ft. .SUN NIGHT...S winds 5 to 10 kt. Seas around 2 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. $$ ANZ231-290900- Cape Cod Bay- 403 PM EDT Tue Jul 28 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 AM EDT WEDNESDAY THROUGH WEDNESDAY EVENING... .TONIGHT...SE winds 5 to 10 kt. Gusts up to 20 kt this evening. Seas around 2 ft. Wave Detail: S 1 foot at 3 seconds and E 1 foot at 7 seconds. .WED...SE winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 3 seconds and E 2 ft at 7 seconds. A chance of showers in the afternoon. .WED NIGHT...E winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 4 seconds. Showers likely. .THU...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: NE 2 ft at 4 seconds. A chance of showers in the morning. Showers likely in the afternoon. .THU NIGHT...N winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: N 2 ft at 5 seconds. A chance of showers. .FRI AND FRI NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: N 2 ft at 5 seconds. .SAT THROUGH SUN...S winds 5 to 10 kt with gusts up to 20 kt. Seas around 2 ft. .SUN NIGHT...S winds 5 to 10 kt. Seas around 2 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-290900- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 NM- 403 PM EDT Tue Jul 28 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 8 PM EDT THIS EVENING THROUGH THURSDAY MORNING... .TONIGHT...SE winds 10 to 15 kt. Seas around 3 ft. Wave Detail: SE 3 ft at 8 seconds and S 2 ft at 3 seconds. .WED...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: SE 4 ft at 7 seconds and SE 3 ft at 4 seconds. A chance of showers in the afternoon. .WED NIGHT...E winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: SE 5 ft at 7 seconds. Showers likely. .THU...E winds around 10 kt, becoming N in the afternoon. Gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 7 seconds and E 1 foot at 2 seconds. A chance of showers. .THU NIGHT...N winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at 7 seconds and N 2 ft at 3 seconds. A chance of showers. .FRI AND FRI NIGHT...NW winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: NE 4 ft at 8 seconds and NW 1 foot at 3 seconds. .SAT THROUGH SUN...S winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 3 ft. .SUN NIGHT...S winds around 10 kt. Seas 2 to 3 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. $$ ANZ255-290900- Coastal Waters extending out to 25 NM South of Marthas Vineyard and Nantucket- 403 PM EDT Tue Jul 28 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 8 PM EDT THIS EVENING THROUGH THURSDAY MORNING... .TONIGHT...SE winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas 3 to 4 ft. Wave Detail: S 3 ft at 6 seconds. .WED...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 5 ft. Wave Detail: SE 5 ft at 5 seconds. A chance of showers in the morning. Showers likely in the afternoon. .WED NIGHT...E winds 15 to 20 kt, becoming SE 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: E 5 ft at 7 seconds and NW 3 ft at 8 seconds. Showers likely in the evening. A chance of showers after midnight. .THU...SW winds around 10 kt, becoming NW with gusts up to 20 kt in the afternoon. Seas 3 to 5 ft. Wave Detail: SE 5 ft at 8 seconds and NW 4 ft at 4 seconds. .THU NIGHT...N winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 7 seconds and NW 2 ft at 4 seconds. A chance of showers. .FRI AND FRI NIGHT...NW winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: SE 4 ft at 8 seconds and NW 2 ft at 4 seconds. .SAT THROUGH SUN...S winds 5 to 10 kt. Seas 2 to 3 ft. .SUN NIGHT...S winds around 10 kt. Seas 2 to 3 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-290900- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 NM South of Block Island- 403 PM EDT Tue Jul 28 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 8 PM EDT THIS EVENING THROUGH THURSDAY MORNING... .TONIGHT...S winds 10 to 15 kt, becoming SE 15 to 20 kt after midnight. Gusts up to 25 kt. Seas 4 to 5 ft. Wave Detail: SE 4 ft at 6 seconds. A slight chance of showers with isolated tstms after midnight. .WED...SE winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 6 ft. Wave Detail: SE 5 ft at 7 seconds. A chance of showers in the morning. Showers likely in the afternoon. .WED NIGHT...E winds 15 to 20 kt with gusts up to 25 kt, diminishing to 10 to 15 kt after midnight. Seas 4 to 5 ft. Wave Detail: E 5 ft at 7 seconds and SW 2 ft at 7 seconds. A chance of showers. .THU...N winds 10 to 15 kt with gusts up to 20 kt. Seas around 4 ft. Wave Detail: SE 4 ft at 8 seconds and NW 3 ft at 8 seconds. A chance of showers in the afternoon. .THU NIGHT...N winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas around 4 ft. Wave Detail: NE 4 ft at 7 seconds and N 3 ft at 4 seconds. A chance of showers in the evening. .FRI AND FRI NIGHT...W winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: NE 4 ft at 8 seconds and N 2 ft at 4 seconds. .SAT THROUGH SUN NIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft. Winds and seas higher in and near tstms. 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. $$ ANZ232-290900- Nantucket Sound- 403 PM EDT Tue Jul 28 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 8 PM EDT THIS EVENING THROUGH WEDNESDAY EVENING... .TONIGHT...SE winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: S 2 ft at 3 seconds and SE 1 foot at 7 seconds. .WED...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SE 3 ft at 4 seconds and E 3 ft at 7 seconds. Showers likely in the afternoon. .WED NIGHT...E winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SE 4 ft at 6 seconds. Showers likely in the evening. A chance of showers after midnight. .THU...E winds 10 to 15 kt, becoming N with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: E 3 ft at 7 seconds and W 2 ft at 4 seconds. A chance of showers in the afternoon. .THU NIGHT...N winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. Wave Detail: NE 3 ft at 6 seconds and W 2 ft at 4 seconds. A chance of showers. .FRI AND FRI NIGHT...NW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: NE 3 ft at 6 seconds and W 1 foot at 4 seconds. .SAT THROUGH SUN...SW winds 10 to 15 kt. Seas around 2 ft. .SUN NIGHT...S winds 10 to 15 kt. Seas around 2 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-290900- Vineyard Sound- 403 PM EDT Tue Jul 28 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 8 PM EDT THIS EVENING THROUGH WEDNESDAY EVENING... .TONIGHT...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 6 seconds. .WED...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 5 seconds. A chance of showers in the morning. Showers likely in the afternoon. .WED NIGHT...E winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 5 seconds and S 2 ft at 6 seconds. Showers likely in the evening. A chance of showers after midnight. .THU...NE winds 10 to 15 kt, becoming N with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds and E 2 ft at 5 seconds. A chance of showers. .THU NIGHT...N winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. Wave Detail: NE 3 ft at 5 seconds and NW 1 foot at 7 seconds. A chance of showers in the evening. .FRI AND FRI NIGHT...NW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at 7 seconds and NW 1 foot at 4 seconds. .SAT THROUGH SUN...SW winds 10 to 15 kt. Seas around 2 ft. .SUN NIGHT...S winds 10 to 15 kt. Seas around 2 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. $$ ANZ234-290900- Buzzards Bay- 403 PM EDT Tue Jul 28 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 8 PM EDT THIS EVENING THROUGH WEDNESDAY EVENING... .TONIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 4 seconds and SE 1 foot at 7 seconds. .WED...SE winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 3 seconds and SE 3 ft at 7 seconds. A chance of showers in the morning. Showers likely in the afternoon. .WED NIGHT...E winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 4 seconds. Showers likely. .THU...NE winds 10 to 15 kt, becoming N in the afternoon. Gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: NE 2 ft at 4 seconds. A chance of showers in the morning. Showers likely in the afternoon. .THU NIGHT...N winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. Wave Detail: NE 2 ft at 4 seconds and W 1 foot at 4 seconds. Showers likely in the evening. .FRI AND FRI NIGHT...NW winds 10 to 15 kt. Seas around 2 ft. Wave Detail: NE 2 ft at 7 seconds and NW 1 foot at 5 seconds. .SAT THROUGH SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .SUN NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-290900- Rhode Island Sound- 403 PM EDT Tue Jul 28 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 8 PM EDT THIS EVENING THROUGH WEDNESDAY EVENING... .TONIGHT...S winds 10 to 15 kt, becoming SE 15 to 20 kt after midnight. Seas 3 to 5 ft. Wave Detail: S 3 ft at 6 seconds. A slight chance of showers with isolated tstms after midnight. .WED...SE winds 15 to 20 kt, increasing to 20 to 25 kt in the afternoon. Gusts up to 30 kt. Seas 4 to 6 ft. Wave Detail: SE 6 ft at 6 seconds. A chance of showers in the morning. Showers in the afternoon. .WED NIGHT...E winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at 6 seconds and SW 1 foot at 6 seconds. Showers likely. .THU...N winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas 3 to 4 ft. Wave Detail: E 4 ft at 8 seconds and S 2 ft at 6 seconds. A chance of showers in the morning. Showers likely in the afternoon. .THU NIGHT...N winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 3 to 4 ft. Wave Detail: NE 4 ft at 7 seconds and N 3 ft at 4 seconds. A chance of showers in the evening. .FRI AND FRI NIGHT...W winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: NE 4 ft at 8 seconds and NW 2 ft at 5 seconds. .SAT THROUGH SUN...S winds 10 to 15 kt. Seas 2 to 3 ft. .SUN NIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers. Winds and seas higher in and near tstms. 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. $$ ANZ237-290900- Block Island Sound- 403 PM EDT Tue Jul 28 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 8 PM EDT THIS EVENING THROUGH WEDNESDAY EVENING... .TONIGHT...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: SE 3 ft at 6 seconds. A chance of showers with isolated tstms after midnight. .WED...SE winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. Wave Detail: SE 5 ft at 6 seconds. Showers. .WED NIGHT...E winds 15 to 20 kt with gusts up to 25 kt, becoming NE 10 to 15 kt after midnight. Seas 2 to 4 ft. Wave Detail: E 4 ft at 6 seconds and S 2 ft at 6 seconds. Showers likely. .THU...N winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: E 4 ft at 7 seconds and NW 2 ft at 5 seconds. A chance of showers in the morning. Showers likely in the afternoon. .THU NIGHT...N winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 4 ft. Wave Detail: N 4 ft at 7 seconds. Showers likely in the evening. .FRI AND FRI NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: NE 3 ft at 8 seconds and N 1 foot at 4 seconds. .SAT THROUGH SUN...S winds 5 to 10 kt. Seas around 2 ft. .SUN NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-290900- Boston Harbor- 403 PM EDT Tue Jul 28 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 AM EDT WEDNESDAY THROUGH WEDNESDAY EVENING... .TONIGHT...SE winds 10 to 15 kt. Gusts up to 20 kt this evening. Waves around 2 ft this evening, then 1 foot or less. A slight chance of showers and tstms this evening. .WED...SE winds 10 to 15 kt, becoming E 15 to 20 kt in the afternoon. Gusts up to 25 kt. Waves 2 to 3 ft. A chance of showers in the morning. Showers likely in the afternoon. .WED NIGHT...E winds 15 to 20 kt with gusts up to 25 kt. Waves 2 to 3 ft. Showers likely in the evening. Showers after midnight. .THU...NE winds 15 to 20 kt with gusts up to 25 kt. Waves 2 to 3 ft. Showers. .THU NIGHT...N winds 10 to 15 kt. Gusts up to 20 kt in the evening. Waves around 2 ft. Showers likely in the evening. A chance of showers after midnight. .FRI AND FRI NIGHT...NW winds 5 to 10 kt. Waves 1 foot or less. .SAT THROUGH SUN...S winds 5 to 10 kt. Waves around 2 ft. .SUN NIGHT...S winds 5 to 10 kt. Waves around 2 ft. A chance of showers. Winds and waves higher in and near tstms. 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. $$ ANZ236-290900- Narragansett Bay- 403 PM EDT Tue Jul 28 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 8 PM EDT THIS EVENING THROUGH WEDNESDAY EVENING... .TONIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft. A slight chance of showers with isolated tstms after midnight. .WED...SE winds 15 to 20 kt with gusts up to 30 kt. Waves 2 to 4 ft. Showers. .WED NIGHT...E winds 15 to 20 kt with gusts up to 25 kt, becoming NE 10 to 15 kt after midnight. Waves 2 to 3 ft. Showers likely. .THU...N winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Waves 2 to 3 ft. Showers likely. .THU NIGHT...N winds 10 to 15 kt. Gusts up to 20 kt in the evening. Waves 2 to 3 ft. Showers likely in the evening. .FRI AND FRI NIGHT...W winds 5 to 10 kt. Waves around 2 ft. .SAT THROUGH SUN...S winds 5 to 10 kt. Waves around 2 ft. .SUN NIGHT...S winds 5 to 10 kt. Waves around 2 ft. A chance of showers. Winds and waves higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ280-290900- Ocean Waters from the Merrimack River to Plymouth from 40 to 60 NM- 403 PM EDT Tue Jul 28 2026 .TONIGHT...S winds 10 to 15 kt. Gusts up to 20 kt this evening. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 8 seconds and S 2 ft at 4 seconds. Patchy fog this evening with vsby 1 to 3 NM. .WED...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: SE 4 ft at 8 seconds and SE 3 ft at 4 seconds. .WED NIGHT...E winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 5 ft. Wave Detail: SE 5 ft at 6 seconds. A chance of showers in the evening. Showers after midnight. .THU...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 5 ft. Wave Detail: E 5 ft at 7 seconds and SE 1 foot at 2 seconds. Showers likely. .THU NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 5 ft. Wave Detail: NE 5 ft at 7 seconds and W 2 ft at 3 seconds. A chance of showers. .FRI AND FRI NIGHT...N winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: NE 5 ft at 8 seconds and N 3 ft at 4 seconds. .SAT THROUGH SUN...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .SUN NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 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. $$ ANZ281-290900- Ocean Waters from Provincetown to Nantucket from 20 to 60 NM- 403 PM EDT Tue Jul 28 2026 .TONIGHT...SE winds around 10 kt. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 8 seconds and S 2 ft at 4 seconds. .WED...SE winds 10 to 15 kt, becoming E 15 to 20 kt in the afternoon. Gusts up to 25 kt. Seas 4 to 5 ft. Wave Detail: SE 4 ft at 7 seconds and SE 3 ft at 4 seconds. A chance of showers in the afternoon. .WED NIGHT...E winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 5 ft. Wave Detail: SE 5 ft at 7 seconds. A chance of showers in the evening. Showers likely after midnight. .THU...SE winds 10 to 15 kt, becoming NW in the afternoon. Gusts up to 25 kt. Seas 4 to 5 ft. Wave Detail: SE 5 ft at 8 seconds and W 4 ft at 6 seconds. A chance of showers in the morning. .THU NIGHT...N winds around 10 kt with gusts up to 20 kt. Seas 4 to 5 ft. Wave Detail: SE 5 ft at 8 seconds and W 3 ft at 5 seconds. A chance of showers. .FRI...N winds 10 to 15 kt. Gusts up to 20 kt in the morning. Seas 4 to 5 ft. Wave Detail: NE 5 ft at 9 seconds and NW 3 ft at 5 seconds. A chance of showers in the morning. .FRI NIGHT...NW winds 5 to 10 kt. Seas 3 to 4 ft. .SAT THROUGH SUN...S winds 5 to 10 kt with gusts up to 20 kt. Seas 3 to 4 ft. .SUN NIGHT...S winds around 10 kt with gusts up to 20 kt. Seas around 3 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ282-290900- Ocean Waters from Marthas Vineyard to Nantucket from 25 to 60 NM- 403 PM EDT Tue Jul 28 2026 .TONIGHT...SE winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas 3 to 4 ft. Wave Detail: S 3 ft at 6 seconds. .WED...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 5 ft. Wave Detail: S 5 ft at 7 seconds. A chance of showers in the morning. Showers in the afternoon. .WED NIGHT...SE winds 15 to 20 kt with gusts up to 25 kt, becoming S around 10 kt after midnight. Seas 4 to 5 ft. Wave Detail: SE 5 ft at 7 seconds and NW 3 ft at 6 seconds. Showers likely in the evening. A chance of showers after midnight. .THU...W winds around 10 kt. Seas around 5 ft. Wave Detail: S 5 ft at 8 seconds and NW 4 ft at 6 seconds. .THU NIGHT THROUGH FRI NIGHT...NW winds 5 to 10 kt. Seas 3 to 5 ft. Wave Detail: S 4 ft at 8 seconds and NW 3 ft at 4 seconds. .SAT THROUGH SUN...S winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: S 4 ft at 8 seconds and NW 1 foot at 4 seconds. .SUN NIGHT...S winds around 10 kt. Seas 2 to 4 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. $$ ANZ283-290900- Ocean Waters from Montauk NY to Marthas Vineyard from 25 to 60 NM- 403 PM EDT Tue Jul 28 2026 .TONIGHT...SE winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Gusts up to 25 kt. Seas 4 to 5 ft. Wave Detail: S 3 ft at 6 seconds. A slight chance of showers with isolated tstms after midnight. .WED...SE winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 6 ft. Wave Detail: SE 5 ft at 6 seconds. A chance of showers in the morning. Showers likely in the afternoon. .WED NIGHT...SE winds 10 to 15 kt with gusts up to 20 kt, becoming SW after midnight. Seas 4 to 5 ft. Wave Detail: SE 5 ft at 7 seconds and N 4 ft at 7 seconds. A chance of showers in the evening. .THU...W winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas 4 to 5 ft. Wave Detail: SE 5 ft at 8 seconds and NW 4 ft at 6 seconds. .THU NIGHT AND FRI...N winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 5 ft. Wave Detail: S 4 ft at 8 seconds and NW 2 ft at 4 seconds. .FRI NIGHT...NW winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: S 3 ft at 8 seconds and N 1 foot at 4 seconds. .SAT THROUGH SUN...S winds 5 to 10 kt. Seas 2 to 3 ft. .SUN NIGHT...S winds around 10 kt. Seas 2 to 4 ft. A chance of showers. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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