Coastal Waters Forecast
Issued by NWS Boston, MA
Issued by NWS Boston, MA
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890 FZUS51 KBOX 281103 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 703 AM EDT Tue Jul 28 2026 Coastal waters from the Merrimack River MA to Watch Hill RI out to 60 NM ANZ200-290000- 703 AM EDT Tue Jul 28 2026 .Synopsis for Massachusetts and Rhode Island coastal waters... Increasing risk for rough seas towards the middle of next week as low pressure approaches from the W. Best chance for Small Craft Advisory conditions exist for the outer waters later Wednesday. Low pressure will also bring periodic chances for showers and perhaps thunderstorms Tue through mid-week. Rough seas should start to diminish heading into the back half of the week. $$ ANZ250-290000- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 703 AM EDT Tue Jul 28 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH THURSDAY MORNING... .TODAY...S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt this afternoon. Seas 2 to 4 ft. Wave Detail: SE 3 ft at 8 seconds and S 2 ft at 3 seconds. .TONIGHT...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: SE 3 ft at 4 seconds and SE 2 ft at 8 seconds. .WED...E winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. Wave Detail: SE 5 ft at 6 seconds. A chance of showers in the morning. Showers likely in the afternoon. .WED NIGHT...E winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: SE 4 ft at 6 seconds. Showers. Patchy fog in the evening. Vsby 1 to 3 NM. .THU...E winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at 6 seconds and SE 1 foot at 3 seconds. Showers likely, mainly in the morning. .THU NIGHT...NE winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at 7 seconds and W 1 foot at 4 seconds. A chance of showers. .FRI...NE winds 5 to 10 kt. Seas 2 to 4 ft. A chance of showers. .FRI NIGHT THROUGH SAT NIGHT...S winds around 5 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-290000- Massachusetts Bay and Ipswich Bay- 703 AM EDT Tue Jul 28 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH WEDNESDAY EVENING... .TODAY...S winds 5 to 10 kt, becoming SE 10 to 15 kt with gusts up to 20 kt this afternoon. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 4 seconds and E 2 ft at 7 seconds. A slight chance of showers with isolated tstms this afternoon. .TONIGHT...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 4 seconds and E 2 ft at 7 seconds. .WED...E winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 5 seconds. Showers. .WED NIGHT...E winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SE 4 ft at 6 seconds. Showers. Patchy fog in the evening. Vsby 1 to 3 NM. .THU AND THU NIGHT...N winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 6 seconds and SE 1 foot at 3 seconds. Showers likely . .FRI THROUGH SAT NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: NE 3 ft at 6 seconds. 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. $$ ANZ231-290000- Cape Cod Bay- 703 AM EDT Tue Jul 28 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH WEDNESDAY EVENING... .TODAY...S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt this afternoon. Seas 2 to 3 ft. Wave Detail: S 1 foot at 2 seconds and E 1 foot at 6 seconds. .TONIGHT...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: S 1 foot at 3 seconds and E 1 foot at 7 seconds. .WED...SE winds 15 to 20 kt with gusts up to 30 kt. Seas around 3 ft. Wave Detail: E 3 ft at 4 seconds. Showers. .WED NIGHT...E winds 10 to 15 kt with gusts up to 25 kt, becoming SE 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave Detail: E 2 ft at 4 seconds. Showers. Patchy fog in the evening. Vsby 1 to 3 NM. .THU...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 1 foot at 2 seconds and NE 1 foot at 5 seconds. A chance of showers. .THU NIGHT...NE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N 2 ft at 5 seconds and E 1 foot at 2 seconds. A chance of showers. .FRI...N winds 5 to 10 kt. Seas around 2 ft. A chance of showers. .FRI NIGHT THROUGH SAT NIGHT...SW winds around 5 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-290000- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 NM- 703 AM EDT Tue Jul 28 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH THURSDAY MORNING... .TODAY...S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt this afternoon. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds and S 2 ft at 3 seconds. .TONIGHT...SE winds 10 to 15 kt with gusts up to 20 kt. Seas around 3 ft. Wave Detail: SE 3 ft at 4 seconds and SE 3 ft at 7 seconds. .WED...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 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, becoming S 5 to 10 kt after midnight. Gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: SE 4 ft at 6 seconds. Showers likely, mainly in the evening. Patchy fog in the evening. Vsby 1 to 3 NM. .THU...S winds 5 to 10 kt. Seas 3 to 5 ft. Wave Detail: SE 4 ft at 8 seconds and SW 1 foot at 3 seconds. .THU NIGHT...SE winds 5 to 10 kt, becoming NE after midnight. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 8 seconds and SW 1 foot at 3 seconds. A chance of showers. .FRI...N winds around 10 kt. Seas 3 to 5 ft. A chance of showers. .FRI NIGHT THROUGH SAT NIGHT...SW 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. $$ ANZ255-290000- Coastal Waters extending out to 25 NM South of Marthas Vineyard and Nantucket- 703 AM EDT Tue Jul 28 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH THURSDAY MORNING... .TODAY...S winds 10 to 15 kt. Gusts up to 20 kt this afternoon. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds and SW 2 ft at 4 seconds. .TONIGHT...SE winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Gusts up to 25 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 6 seconds. .WED...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. Wave Detail: SE 5 ft at 7 seconds. Showers. .WED NIGHT...SE winds 10 to 15 kt with gusts up to 20 kt, becoming S after midnight. Seas 4 to 5 ft. Wave Detail: S 5 ft at 7 seconds. Showers likely, mainly in the evening. Patchy fog in the evening. .THU...S winds around 10 kt. Seas 3 to 5 ft. Wave Detail: S 4 ft at 8 seconds and SW 3 ft at 7 seconds. .THU NIGHT...SW winds around 10 kt, becoming NW after midnight. Seas 3 to 5 ft. Wave Detail: S 4 ft at 8 seconds and SW 2 ft at 4 seconds. A chance of showers. .FRI...N winds around 10 kt. Seas 3 to 5 ft. A chance of showers. .FRI NIGHT THROUGH SAT NIGHT...SW winds 5 to 10 kt. Seas 2 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-290000- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 NM South of Block Island- 703 AM EDT Tue Jul 28 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH THURSDAY MORNING... .TODAY...S winds 10 to 15 kt. Gusts up to 20 kt this afternoon. Seas 3 to 4 ft. Wave Detail: S 3 ft at 6 seconds. .TONIGHT...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: SE 5 ft at 6 seconds. A chance of showers after midnight. .WED...SE winds 20 to 25 kt, diminishing to 15 to 20 kt in the afternoon. Gusts up to 30 kt. Seas 5 to 6 ft. Wave Detail: S 6 ft at 7 seconds. Showers. .WED NIGHT...S winds 10 to 15 kt. Seas 4 to 5 ft. Wave Detail: NW 5 ft at 9 seconds and SE 4 ft at 7 seconds. A chance of showers. Patchy fog in the evening. .THU...SW winds 10 to 15 kt. Seas 4 to 5 ft. Wave Detail: S 4 ft at 8 seconds and W 2 ft at 6 seconds. A chance of showers in the morning. .THU NIGHT...N winds 10 to 15 kt. Seas 4 to 5 ft. Wave Detail: S 4 ft at 8 seconds and NW 2 ft at 4 seconds. A chance of showers after midnight. .FRI THROUGH SAT NIGHT...SW 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. $$ ANZ232-290000- Nantucket Sound- 703 AM EDT Tue Jul 28 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH WEDNESDAY EVENING... .TODAY...S winds 10 to 15 kt. Gusts up to 20 kt this afternoon. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and E 1 foot at 7 seconds. .TONIGHT...SE winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 4 seconds and SE 1 foot at 7 seconds. .WED...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 6 seconds. Showers. .WED NIGHT...SE winds 15 to 20 kt, becoming S around 10 kt after midnight. Seas 2 to 4 ft. Wave Detail: E 3 ft at 5 seconds and SW 1 foot at 6 seconds. Showers, mainly in the evening. Patchy fog in the evening. .THU...S winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 3 seconds and SE 2 ft at 7 seconds. A chance of showers. .THU NIGHT...SW winds 10 to 15 kt, becoming N after midnight. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and SE 2 ft at 8 seconds. A chance of showers. .FRI...N winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers. .FRI NIGHT THROUGH SAT NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-290000- Vineyard Sound- 703 AM EDT Tue Jul 28 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH WEDNESDAY EVENING... .TODAY...S winds 10 to 15 kt. Gusts up to 20 kt this afternoon. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and S 1 foot at 7 seconds. .TONIGHT...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 6 seconds. A chance of showers after midnight. .WED...SE winds 20 to 25 kt, diminishing to 15 to 20 kt in the afternoon. Gusts up to 30 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 7 seconds. Showers. .WED NIGHT...SE winds 10 to 15 kt with gusts up to 20 kt, becoming S 5 to 10 kt after midnight. Seas 2 to 4 ft. Wave Detail: E 2 ft at 6 seconds and S 2 ft at 7 seconds. Showers. Patchy fog in the evening. .THU...S winds 5 to 10 kt, becoming SW 10 to 15 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and S 3 ft at 7 seconds. A chance of showers. .THU NIGHT...N winds around 10 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 9 seconds and W 1 foot at 5 seconds. A chance of showers. .FRI...N winds around 10 kt. Seas 2 to 3 ft. A chance of showers. .FRI NIGHT THROUGH SAT NIGHT...SW 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. $$ ANZ234-290000- Buzzards Bay- 703 AM EDT Tue Jul 28 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH WEDNESDAY EVENING... .TODAY...S winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and SE 1 foot at 7 seconds. .TONIGHT...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 4 seconds and SE 2 ft at 7 seconds. A chance of showers after midnight. .WED...SE winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 9 seconds and SE 3 ft at 4 seconds. Showers. .WED NIGHT...SE winds 10 to 15 kt with gusts up to 20 kt, becoming S 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave Detail: E 2 ft at 5 seconds. Showers. Patchy fog in the evening. .THU...S winds 10 to 15 kt, becoming SW with gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and S 2 ft at 7 seconds. A chance of showers in the morning, then showers likely in the afternoon. .THU NIGHT...N winds around 10 kt. Seas around 2 ft. Wave Detail: NW 1 foot at 4 seconds and S 1 foot at 9 seconds. A chance of showers. .FRI...N winds around 10 kt. Seas around 2 ft. A chance of showers. .FRI NIGHT THROUGH SAT NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-290000- Rhode Island Sound- 703 AM EDT Tue Jul 28 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH WEDNESDAY EVENING... .TODAY...S winds 10 to 15 kt. Gusts up to 20 kt this afternoon. Seas 2 to 3 ft. Wave Detail: S 3 ft at 6 seconds. .TONIGHT...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: SE 4 ft at 6 seconds. A chance of showers after midnight. .WED...SE winds 20 to 25 kt, diminishing to 15 to 20 kt in the afternoon. Gusts up to 30 kt. Seas 4 to 6 ft. Wave Detail: S 6 ft at 7 seconds. Showers. .WED NIGHT...SE winds 10 to 15 kt with gusts up to 20 kt, becoming S after midnight. Seas 3 to 5 ft. Wave Detail: SE 4 ft at 7 seconds. Showers likely, mainly in the evening. Patchy fog in the evening. .THU...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas 3 to 4 ft. Wave Detail: S 4 ft at 8 seconds and SW 2 ft at 7 seconds. A chance of showers. .THU NIGHT...N winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: S 4 ft at 9 seconds and NW 1 foot at 4 seconds. A chance of showers. .FRI THROUGH SAT NIGHT...SW 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. $$ ANZ237-290000- Block Island Sound- 703 AM EDT Tue Jul 28 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH WEDNESDAY EVENING... .TODAY...S winds 10 to 15 kt. Gusts up to 20 kt this afternoon. Seas 2 to 3 ft. Wave Detail: S 3 ft at 6 seconds. A slight chance of showers with isolated tstms this afternoon. .TONIGHT...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: SE 4 ft at 7 seconds. A chance of showers after midnight. .WED...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. Wave Detail: S 5 ft at 6 seconds. Showers. .WED NIGHT...SE winds 5 to 10 kt. Seas 3 to 5 ft. Wave Detail: S 4 ft at 6 seconds. A chance of showers. .THU...S winds around 10 kt, becoming SW in the afternoon. Seas 3 to 4 ft. Wave Detail: S 4 ft at 7 seconds. A chance of showers. .THU NIGHT...N winds around 10 kt. Seas 2 to 4 ft. Wave Detail: SE 4 ft at 9 seconds and NW 2 ft at 7 seconds. A chance of showers in the evening. .FRI THROUGH SAT NIGHT...SW winds 5 to 10 kt. Seas 2 to 4 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-290000- Boston Harbor- 703 AM EDT Tue Jul 28 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH WEDNESDAY EVENING... .TODAY...S winds 5 to 10 kt, becoming SE 10 to 15 kt with gusts up to 20 kt this afternoon. Waves 1 foot or less, then around 2 ft this afternoon. A slight chance of showers with isolated tstms this afternoon. .TONIGHT...SE winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. .WED...E winds 15 to 20 kt with gusts up to 25 kt. Waves 2 to 3 ft. Showers. .WED NIGHT...E winds 15 to 20 kt with gusts up to 25 kt, diminishing to 10 to 15 kt after midnight. Waves 2 to 3 ft. Showers. Patchy fog in the evening. Vsby 1 to 3 NM. .THU AND THU NIGHT...N winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft. Showers. .FRI THROUGH SAT NIGHT...S winds 5 to 10 kt. Waves 1 foot or less. 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. $$ ANZ236-290000- Narragansett Bay- 703 AM EDT Tue Jul 28 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH WEDNESDAY EVENING... .TODAY...S winds 10 to 15 kt. Gusts up to 20 kt this afternoon. Waves 2 to 3 ft. A slight chance of showers with isolated tstms this afternoon. .TONIGHT...SE winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Gusts up to 25 kt. Waves 2 to 3 ft. A chance of showers after midnight. .WED...SE winds 15 to 20 kt with gusts up to 25 kt. Waves 2 to 4 ft. Showers. .WED NIGHT...E winds 10 to 15 kt, becoming SE 5 to 10 kt after midnight. Waves 2 to 3 ft. Showers likely. Patchy fog in the evening. .THU...E winds 5 to 10 kt, becoming N 10 to 15 kt in the afternoon. Waves 2 to 3 ft. A chance of showers in the morning, then showers likely in the afternoon. .THU NIGHT...N winds 5 to 10 kt. Waves 2 to 3 ft. A chance of showers. .FRI...N winds 5 to 10 kt. Waves 2 to 3 ft. A chance of showers. .FRI NIGHT...N winds 5 to 10 kt. Waves around 2 ft. A chance of showers. .SAT AND SAT NIGHT...NE winds 5 to 10 kt, becoming SW. Waves around 2 ft. Winds and waves higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ280-290000- Ocean Waters from the Merrimack River to Plymouth from 40 to 60 NM- 703 AM EDT Tue Jul 28 2026 .TODAY...S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt this afternoon. Seas around 3 ft. Wave Detail: SE 3 ft at 8 seconds and S 2 ft at 3 seconds. .TONIGHT...SE winds 10 to 15 kt with gusts up to 20 kt. Seas around 3 ft. Wave Detail: SE 3 ft at 4 seconds and SE 3 ft at 8 seconds. .WED...E winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: SE 5 ft at 6 seconds. A chance of showers. .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. Showers. Patchy fog in the evening. .THU...E winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 5 ft. Wave Detail: E 5 ft at 8 seconds. A chance of showers. .THU NIGHT...NE winds 5 to 10 kt. Seas 4 to 5 ft. Wave Detail: SE 5 ft at 8 seconds and S 1 foot at 2 seconds. A chance of showers. .FRI...NE winds 5 to 10 kt. Seas 4 to 5 ft. A chance of showers. .FRI NIGHT THROUGH SAT NIGHT...SW 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. $$ ANZ281-290000- Ocean Waters from Provincetown to Nantucket from 20 to 60 NM- 703 AM EDT Tue Jul 28 2026 .TODAY...S winds 5 to 10 kt. Seas around 3 ft. Wave Detail: SE 3 ft at 8 seconds and SW 2 ft at 3 seconds. .TONIGHT...SE winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 4 seconds and SE 3 ft at 8 seconds. .WED...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. Wave Detail: SE 5 ft at 6 seconds. A chance of showers. .WED NIGHT...SE winds 15 to 20 kt, becoming S 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 5 to 6 ft. Wave Detail: SE 5 ft at 8 seconds and SW 2 ft at 7 seconds. Showers likely, mainly in the evening. Patchy fog in the evening. Vsby 1 to 3 NM. .THU AND THU NIGHT...S winds 5 to 10 kt. Seas 4 to 6 ft. Wave Detail: S 5 ft at 8 seconds and SW 1 foot at 3 seconds. A chance of showers in the morning. A chance of showers after midnight. .FRI THROUGH SAT NIGHT...SW winds 5 to 10 kt. Seas 3 to 5 ft. Wave Detail: SE 5 ft at 9 seconds and W 1 foot at 5 seconds. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ282-290000- Ocean Waters from Marthas Vineyard to Nantucket from 25 to 60 NM- 703 AM EDT Tue Jul 28 2026 .TODAY...S winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: S 3 ft at 6 seconds. .TONIGHT...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: S 4 ft at 6 seconds. .WED...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. Wave Detail: S 5 ft at 7 seconds. Showers. .WED NIGHT...S winds 10 to 15 kt, becoming SW 5 to 10 kt after midnight. Seas 5 to 6 ft. Wave Detail: S 5 ft at 7 seconds. Patchy fog in the evening. A chance of showers in the evening. .THU AND THU NIGHT...W winds 5 to 10 kt. Seas 5 to 6 ft. Wave Detail: S 5 ft at 8 seconds and W 3 ft at 7 seconds. .FRI THROUGH SAT NIGHT...SW winds 5 to 10 kt. Seas 3 to 5 ft. Wave Detail: S 5 ft at 9 seconds and W 1 foot at 5 seconds. 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. $$ ANZ283-290000- Ocean Waters from Montauk NY to Marthas Vineyard from 25 to 60 NM- 703 AM EDT Tue Jul 28 2026 .TODAY...S winds 10 to 15 kt. Gusts up to 20 kt this afternoon. Seas 3 to 4 ft. Wave Detail: S 3 ft at 6 seconds. .TONIGHT...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. Wave Detail: S 4 ft at 6 seconds. A chance of showers after midnight. .WED...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 6 ft. Wave Detail: S 5 ft at 7 seconds. Showers. .WED NIGHT...S winds around 10 kt. Seas around 5 ft. Wave Detail: S 5 ft at 7 seconds and SW 3 ft at 8 seconds. Patchy fog in the evening. A chance of showers in the evening. .THU...SW winds 10 to 15 kt. Seas 4 to 5 ft. Wave Detail: S 5 ft at 9 seconds and W 2 ft at 6 seconds. .THU NIGHT...NW winds 10 to 15 kt. Seas around 5 ft. Wave Detail: S 4 ft at 8 seconds and W 2 ft at 5 seconds. .FRI THROUGH SAT NIGHT...SW winds 5 to 10 kt. Seas 3 to 5 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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