Coastal Waters Forecast
Issued by NWS Boston, MA
Issued by NWS Boston, MA
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517 FZUS51 KBOX 252304 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 703 PM EDT Tue Aug 25 2026 Coastal waters from the Merrimack River MA to Watch Hill RI out to 60 NM ANZ200-261200- 703 PM EDT Tue Aug 25 2026 .Synopsis for Massachusetts and Rhode Island coastal waters... High pressure remains in control through Thursday afternoon with winds gradually shifting from the SW to the W. A cold front approaches the waters from the W later Thurs with SW winds possibly increasing to SCA criteria ahead of the front. Frontal passage leads to high pressure this weekend. $$ ANZ250-261200- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 703 PM EDT Tue Aug 25 2026 .TONIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: SE 2 ft at 6 seconds and SW 1 foot at 2 seconds. .WED...NW winds 5 to 10 kt, becoming S in the afternoon. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 9 seconds and W 1 foot at 3 seconds. .WED NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 9 seconds and E 1 foot at 2 seconds. .THU...S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 25 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: SE 3 ft at 4 seconds and SE 3 ft at 9 seconds. .THU NIGHT...S winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: S 3 ft at 4 seconds and E 3 ft at 9 seconds. .FRI AND FRI NIGHT...NW winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds and S 2 ft at 4 seconds. A chance of showers. .SAT THROUGH SUN NIGHT...SW winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-261200- Massachusetts Bay and Ipswich Bay- 703 PM EDT Tue Aug 25 2026 .TONIGHT...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 1 foot at 2 seconds and E 1 foot at 6 seconds. .WED...N winds 5 to 10 kt, becoming SE in the afternoon. Seas around 2 ft. Wave Detail: E 2 ft at 10 seconds and W 1 foot at 2 seconds. .WED NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at 10 seconds and SE 1 foot at 3 seconds. .THU...S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: E 3 ft at 9 seconds and SE 2 ft at 4 seconds. .THU NIGHT...S winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 4 seconds and E 2 ft at 9 seconds. .FRI...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 4 seconds and E 2 ft at 8 seconds. A chance of showers. .FRI NIGHT...SW winds around 5 kt, becoming NW after midnight. Seas around 2 ft. A chance of showers and tstms in the evening. .SAT THROUGH SUN NIGHT...SW winds 5 to 10 kt. Seas around 2 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. $$ ANZ231-261200- Cape Cod Bay- 703 PM EDT Tue Aug 25 2026 .TONIGHT...SW winds 5 to 10 kt, becoming W after midnight. Seas around 2 ft. Wave Detail: SW 1 foot at 2 seconds and E 1 foot at 6 seconds. .WED...NW winds 5 to 10 kt, becoming NE in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: NW 1 foot at 3 seconds and E 1 foot at 6 seconds. .WED NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 1 foot at 3 seconds and SW 1 foot at 3 seconds. .THU...S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SW 1 foot at 2 seconds and E 1 foot at 3 seconds. .THU NIGHT...S winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SE 1 foot at 3 seconds and E 1 foot at 11 seconds. .FRI AND FRI NIGHT...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 1 foot at 3 seconds and E 1 foot at 10 seconds. A chance of showers. .SAT THROUGH SUN NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-261200- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 NM- 703 PM EDT Tue Aug 25 2026 .TONIGHT...W winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 5 seconds and SE 2 ft at 6 seconds. .WED...NW winds 5 to 10 kt, becoming SW in the afternoon. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 9 seconds and NW 2 ft at 5 seconds. .WED NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 9 seconds and E 1 foot at 2 seconds. .THU...S winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 9 seconds and S 2 ft at 4 seconds. .THU NIGHT...S winds around 10 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 4 seconds and SE 3 ft at 9 seconds. A chance of showers after midnight. .FRI AND FRI NIGHT...W winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: SE 4 ft at 8 seconds and S 3 ft at 5 seconds. A chance of showers. .SAT AND SAT NIGHT...N winds 5 to 10 kt, becoming S. Seas 2 to 4 ft. .SUN AND SUN NIGHT...W winds 5 to 10 kt, becoming SW. 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. $$ ANZ255-261200- Coastal Waters extending out to 25 NM South of Marthas Vineyard and Nantucket- 703 PM EDT Tue Aug 25 2026 .TONIGHT...W winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 5 seconds and SE 1 foot at 6 seconds. .WED...NW winds 5 to 10 kt, becoming SW in the afternoon. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 5 seconds and SE 2 ft at 10 seconds. .WED NIGHT...SW winds around 5 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 9 seconds and SW 1 foot at 5 seconds. .THU...S winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds and SW 2 ft at 5 seconds. .THU NIGHT AND FRI...S winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 5 seconds and SE 3 ft at 9 seconds. A chance of showers. .FRI NIGHT...W winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: S 4 ft at 7 seconds and SE 4 ft at 8 seconds. .SAT AND SAT NIGHT...N winds 5 to 10 kt, becoming E. Seas 2 to 4 ft. .SUN AND SUN NIGHT...E winds 5 to 10 kt, becoming SW. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-261200- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 NM South of Block Island- 703 PM EDT Tue Aug 25 2026 .TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: W 3 ft at 5 seconds and SE 1 foot at 6 seconds. .WED...NW winds 5 to 10 kt, becoming W in the afternoon. Seas 2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and SE 2 ft at 10 seconds. .WED NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 9 seconds and SW 2 ft at 6 seconds. .THU...SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 3 to 4 ft. Wave Detail: S 3 ft at 4 seconds and SE 3 ft at 9 seconds. .THU NIGHT AND FRI...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: SW 3 ft at 5 seconds and SE 3 ft at 9 seconds. A chance of showers through the day. .FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas around 4 ft. Wave Detail: S 4 ft at 7 seconds and SE 4 ft at 8 seconds. .SAT AND SAT NIGHT...NE winds 5 to 10 kt, becoming SE. Seas 2 to 4 ft. .SUN AND SUN NIGHT...E winds 5 to 10 kt, becoming SW. 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. $$ ANZ232-261200- Nantucket Sound- 703 PM EDT Tue Aug 25 2026 .TONIGHT...W winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and E 1 foot at 6 seconds. .WED...NW winds 5 to 10 kt, becoming SW in the afternoon. Seas around 2 ft. Wave Detail: W 1 foot at 3 seconds and E 1 foot at 6 seconds. .WED NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 1 foot at 3 seconds and E 1 foot at 4 seconds. .THU...SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: S 2 ft at 3 seconds and E 1 foot at 3 seconds. .THU NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 3 seconds and E 1 foot at 9 seconds. A chance of showers after midnight. .FRI...S winds around 10 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 4 seconds and E 1 foot at 9 seconds. A chance of showers. .FRI NIGHT...SW winds 5 to 10 kt, becoming W after midnight. Seas around 2 ft. A chance of showers in the evening. .SAT THROUGH SUN NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-261200- Vineyard Sound- 703 PM EDT Tue Aug 25 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 2 ft at 5 seconds and SE 1 foot at 6 seconds. .WED...NW winds around 5 kt, becoming SW in the afternoon. Seas around 2 ft. Wave Detail: SW 1 foot at 5 seconds and SE 1 foot at 6 seconds. .WED NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 1 foot at 4 seconds and E 1 foot at 6 seconds. .THU...SW winds 5 to 10 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 4 seconds and NE 1 foot at 2 seconds. .THU NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: E 2 ft at 3 seconds and SW 2 ft at 5 seconds. A chance of showers after midnight. .FRI...S winds around 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds. A chance of showers. .FRI NIGHT...SW winds 5 to 10 kt, becoming W after midnight. Seas 2 to 3 ft. .SAT THROUGH SUN 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. $$ ANZ234-261200- Buzzards Bay- 703 PM EDT Tue Aug 25 2026 .TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming NW 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at 7 seconds. .WED...NW winds around 5 kt, becoming SW in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: SW 1 foot at 5 seconds and SE 1 foot at 7 seconds, becoming SW 1 foot at 4 seconds and E 1 foot at 6 seconds. .WED NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 1 foot at 4 seconds and SE 1 foot at 8 seconds. .THU...SW winds 5 to 10 kt, becoming S 10 to 15 kt in the afternoon. Gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at 3 seconds and SW 2 ft at 3 seconds. .THU NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at 3 seconds and SW 2 ft at 5 seconds. A chance of showers after midnight. .FRI...S winds around 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 6 seconds and SE 1 foot at 9 seconds. A chance of showers. .FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft. .SAT THROUGH SUN NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-261200- Rhode Island Sound- 703 PM EDT Tue Aug 25 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: W 3 ft at 5 seconds and SE 1 foot at 7 seconds. .WED...NW winds 5 to 10 kt, becoming SW in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and SE 2 ft at 10 seconds. .WED NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and SE 2 ft at 9 seconds. .THU...S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 3 seconds and S 2 ft at 7 seconds. .THU NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 5 seconds and SE 2 ft at 9 seconds. A chance of showers after midnight. .FRI...S winds around 10 kt. Seas 2 to 4 ft. Wave Detail: S 3 ft at 7 seconds and E 1 foot at 3 seconds. A chance of showers. .FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas 2 to 3 ft. .SAT THROUGH SUN 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. $$ ANZ237-261200- Block Island Sound- 703 PM EDT Tue Aug 25 2026 .TONIGHT...W winds 5 to 10 kt. Gusts up to 20 kt this evening. Seas around 2 ft. Wave Detail: W 2 ft at 4 seconds and SE 1 foot at 7 seconds. .WED...NW winds 5 to 10 kt, becoming SW in the afternoon. Seas around 2 ft. Wave Detail: SE 2 ft at 10 seconds and W 1 foot at 4 seconds. .WED NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 9 seconds and SW 1 foot at 5 seconds. .THU...S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 3 seconds and S 2 ft at 6 seconds. .THU NIGHT AND FRI...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 5 seconds and SE 2 ft at 9 seconds. A chance of showers. .FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and SE 1 foot at 3 seconds. .SAT THROUGH SUN NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-261200- Boston Harbor- 703 PM EDT Tue Aug 25 2026 .TONIGHT...W winds 5 to 10 kt. Waves 1 foot or less. .WED...N winds around 5 kt, becoming E in the afternoon. Waves 1 foot or less. .WED NIGHT...S winds 5 to 10 kt, becoming SW after midnight. Waves around 2 ft in the evening, then 1 foot or less. .THU...S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Waves 1 foot or less, then around 2 ft in the afternoon. .THU NIGHT...S winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Waves around 2 ft. A chance of showers after midnight. .FRI...S winds 5 to 10 kt. Waves 1 foot or less. A chance of showers in the morning, then showers likely with a chance of tstms in the afternoon. .FRI NIGHT...SW winds around 5 kt, becoming NW after midnight. Waves 1 foot or less. A chance of showers and tstms in the evening. .SAT THROUGH SUN NIGHT...SW 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. $$ ANZ236-261200- Narragansett Bay- 703 PM EDT Tue Aug 25 2026 .TONIGHT...W winds 5 to 10 kt. Gusts up to 20 kt this evening. Waves around 2 ft. .WED...NW winds around 5 kt, becoming SW in the afternoon. Waves 1 foot or less, then around 2 ft in the afternoon. .WED NIGHT...SW winds 5 to 10 kt. Waves around 2 ft. .THU...S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Waves 2 to 3 ft. .THU NIGHT...S winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Waves around 2 ft. A chance of showers after midnight. .FRI AND FRI NIGHT...NW winds 5 to 10 kt. Waves around 2 ft. A chance of showers. .SAT THROUGH SUN NIGHT...SW winds 5 to 10 kt. Waves around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ280-261200- Ocean Waters from the Merrimack River to Plymouth from 40 to 60 NM- 703 PM EDT Tue Aug 25 2026 .TONIGHT...SW winds around 10 kt, becoming NW with gusts up to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 5 seconds and SE 2 ft at 6 seconds. .WED...NW winds 5 to 10 kt, becoming W in the afternoon. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 9 seconds and W 2 ft at 4 seconds. .WED NIGHT...S winds 5 to 10 kt. Seas around 3 ft. Wave Detail: SE 3 ft at 9 seconds and E 1 foot at 2 seconds. .THU...S winds 10 to 15 kt. Gusts up to 25 kt in the afternoon. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 4 seconds and SE 3 ft at 9 seconds. .THU NIGHT...S winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 4 ft. Wave Detail: S 3 ft at 5 seconds and SE 3 ft at 9 seconds. .FRI...S winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: S 3 ft at 4 seconds and SE 2 ft at 9 seconds. A chance of showers. .FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas around 3 ft. .SAT AND SAT NIGHT...N winds 5 to 10 kt, becoming SW. Seas 2 to 4 ft. .SUN AND SUN NIGHT...W winds 5 to 10 kt, becoming SW 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. $$ ANZ281-261200- Ocean Waters from Provincetown to Nantucket from 20 to 60 NM- 703 PM EDT Tue Aug 25 2026 .TONIGHT...W winds 5 to 10 kt with gusts up to 20 kt. Seas around 3 ft. Wave Detail: SW 2 ft at 5 seconds and SE 2 ft at 6 seconds. .WED...NW winds 5 to 10 kt, becoming W in the afternoon. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 9 seconds and W 2 ft at 5 seconds. .WED NIGHT...S winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 9 seconds and SW 1 foot at 4 seconds. .THU...S winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Seas around 3 ft. Wave Detail: SE 3 ft at 9 seconds and SW 2 ft at 6 seconds. .THU NIGHT...S winds around 10 kt with gusts up to 20 kt. Seas around 3 ft. Wave Detail: S 3 ft at 4 seconds and SE 3 ft at 9 seconds. A chance of showers after midnight. .FRI AND FRI NIGHT...W winds 5 to 10 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: S 5 ft at 7 seconds and SE 5 ft at 8 seconds. A chance of showers. .SAT...N winds 5 to 10 kt. Seas 3 to 5 ft. .SAT NIGHT AND SUN...N winds around 5 kt, becoming NW. Seas 2 to 4 ft. .SUN NIGHT...SW winds 5 to 10 kt with gusts up to 20 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ282-261200- Ocean Waters from Marthas Vineyard to Nantucket from 25 to 60 NM- 703 PM EDT Tue Aug 25 2026 .TONIGHT...W winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Gusts up to 20 kt. Seas around 3 ft. Wave Detail: SW 3 ft at 5 seconds and SE 2 ft at 10 seconds. .WED...W winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 9 seconds and W 2 ft at 5 seconds. .WED NIGHT...SW winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 9 seconds and SW 1 foot at 6 seconds. .THU...SW winds 5 to 10 kt. Seas around 3 ft. Wave Detail: SE 3 ft at 9 seconds and SW 2 ft at 6 seconds. .THU NIGHT AND FRI...SW winds 5 to 10 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: S 5 ft at 7 seconds and SE 3 ft at 9 seconds. Showers likely through the day. A chance of showers in the afternoon. .FRI NIGHT...W winds 5 to 10 kt. Seas 4 to 6 ft. Wave Detail: S 6 ft at 7 seconds and E 3 ft at 10 seconds. A chance of showers in the evening. .SAT...N winds 5 to 10 kt. Seas 3 to 5 ft. .SAT NIGHT THROUGH SUN NIGHT...SW 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. $$ ANZ283-261200- Ocean Waters from Montauk NY to Marthas Vineyard from 25 to 60 NM- 703 PM EDT Tue Aug 25 2026 .TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: W 3 ft at 5 seconds and SE 2 ft at 11 seconds. .WED...W winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 9 seconds and W 2 ft at 4 seconds. .WED NIGHT...SW winds 5 to 10 kt. Seas around 3 ft. Wave Detail: SE 3 ft at 9 seconds and SW 1 foot at 6 seconds. .THU...SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 9 seconds and SW 2 ft at 4 seconds. .THU NIGHT AND FRI...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: SW 4 ft at 5 seconds and SE 4 ft at 8 seconds. A chance of showers. .FRI NIGHT...W winds 5 to 10 kt. Seas 4 to 5 ft. Wave Detail: S 5 ft at 7 seconds and SE 3 ft at 9 seconds. .SAT AND SAT NIGHT...NE winds 5 to 10 kt. Seas 2 to 4 ft. .SUN AND SUN NIGHT...E winds around 5 kt, becoming SW. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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