Coastal Waters Forecast
Issued by NWS Boston, MA
Issued by NWS Boston, MA
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004 FZUS51 KBOX 091403 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 1003 AM EDT Sun Aug 9 2026 Coastal waters from the Merrimack River MA to Watch Hill RI out to 60 NM ANZ200-100300- 1003 AM EDT Sun Aug 9 2026 .Synopsis for Massachusetts and Rhode Island coastal waters... High pressure remains anchored near Bermuda leading to prolonged south to southwest winds across the coastal waters. Still, cannot rule out localized sea breezes near shore. A few strong to severe storms are possible this evening with frequent lightning and gusty winds. High pressure breaks down by early next week, permitting a front to stall across the waters by mid week. $$ ANZ250-100300- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 1003 AM EDT Sun Aug 9 2026 .THIS AFTERNOON...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 1 foot at 3 seconds and SE 1 foot at 8 seconds. .TONIGHT...W winds 5 to 10 kt. Gusts up to 20 kt in the evening. Seas around 2 ft. Wave Detail: W 1 foot at 3 seconds and SE 1 foot at 8 seconds. .MON...W winds around 5 kt, becoming S 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: SW 1 foot at 3 seconds and SE 1 foot at 8 seconds, becoming S 1 foot at 3 seconds and SE 1 foot at 8 seconds. .MON NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. Wave Detail: S 2 ft at 3 seconds and E 1 foot at 8 seconds. .TUE...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 2 ft at 4 seconds and SE 1 foot at 9 seconds. .TUE NIGHT...NW winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft after midnight. Wave Detail: W 1 foot at 4 seconds and SE 1 foot at 10 seconds, becoming NW 1 foot at 3 seconds and SE 1 foot at 10 seconds. .WED AND WED NIGHT...NE winds 5 to 10 kt, becoming SW. Seas around 2 ft. .THU AND THU NIGHT...SW winds 5 to 10 kt, becoming W 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. A chance of showers and tstms. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-100300- Massachusetts Bay and Ipswich Bay- 1003 AM EDT Sun Aug 9 2026 .THIS AFTERNOON...SW winds 5 to 10 kt. Gusts up to 20 kt. Seas 1 foot or less, then around 2 ft. Wave Detail: SW 1 foot at 2 seconds and E 1 foot at 9 seconds. .TONIGHT...W winds 5 to 10 kt. Gusts up to 20 kt in the evening. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: W 1 foot at 2 seconds and E 1 foot at 9 seconds, becoming W 1 foot at 3 seconds and E 1 foot at 9 seconds. .MON...W winds around 5 kt, becoming S with gusts up to 20 kt in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: W 1 foot at 2 seconds and E 1 foot at 9 seconds, becoming SE 1 foot at 3 seconds and E 1 foot at 8 seconds. .MON NIGHT...SW winds around 10 kt. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: S 1 foot at 3 seconds and E 1 foot at 8 seconds, becoming SW 1 foot at 3 seconds and E 1 foot at 8 seconds. .TUE AND TUE NIGHT...NW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: W 1 foot at 3 seconds and E 1 foot at 9 seconds. .WED AND WED NIGHT...NE winds 5 to 10 kt, becoming SW. Seas 1 foot or less. Wave Detail: NW 1 foot at 2 seconds and E 1 foot at 9 seconds. .THU AND THU NIGHT...SW winds 5 to 10 kt, becoming W. Seas 1 foot or less, then around 2 ft. A chance of showers and tstms. 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. $$ ANZ231-100300- Cape Cod Bay- 1003 AM EDT Sun Aug 9 2026 .THIS AFTERNOON...SW winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft. Wave Detail: SW 1 foot at 2 seconds and E 1 foot at 8 seconds, becoming SW 1 foot at 2 seconds and SE 1 foot at 9 seconds. .TONIGHT...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 1 foot at 2 seconds and E 1 foot at 8 seconds. .MON...SW winds around 5 kt, becoming S 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: W 1 foot at 3 seconds and SE 1 foot at 8 seconds, becoming SW 1 foot at 3 seconds and SE 1 foot at 8 seconds. .MON NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: SW 1 foot at 2 seconds and E 1 foot at 9 seconds, becoming SW 1 foot at 2 seconds and E 1 foot at 10 seconds. .TUE AND TUE NIGHT...NW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: W 1 foot at 2 seconds and E 1 foot at 10 seconds. .WED...NE winds around 5 kt. Seas 1 foot or less. Wave Detail: NW 1 foot at 3 seconds and NE 1 foot at 8 seconds. .WED NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. A chance of showers. .THU AND THU NIGHT...SW winds 5 to 10 kt, becoming W. Seas around 2 ft. A chance of showers and tstms. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-100300- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 NM- 1003 AM EDT Sun Aug 9 2026 .THIS AFTERNOON...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: W 3 ft at 6 seconds and E 1 foot at 9 seconds. .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming W 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 6 seconds and E 1 foot at 9 seconds. Patchy fog after midnight with vsby 1 to 3 NM. .MON...SW winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: S 2 ft at 6 seconds and E 1 foot at 9 seconds. Patchy fog. Vsby 1 NM or less, increasing to 1 to 3 NM in the afternoon. .MON NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. Wave Detail: S 3 ft at 5 seconds and E 1 foot at 8 seconds. Patchy fog in the evening with vsby 1 NM or less. .TUE...W winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: W 3 ft at 6 seconds and E 1 foot at 9 seconds. .TUE NIGHT...W winds 10 to 15 kt, becoming NW 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave Detail: W 2 ft at 5 seconds and E 1 foot at 9 seconds. .WED AND WED NIGHT...NW winds 5 to 10 kt, becoming SW. Seas 2 to 3 ft. .THU AND THU NIGHT...SW winds 10 to 15 kt, becoming W. Gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. 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. $$ ANZ255-100300- Coastal Waters extending out to 25 NM South of Marthas Vineyard and Nantucket- 1003 AM EDT Sun Aug 9 2026 .THIS AFTERNOON...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: SW 3 ft at 6 seconds and E 1 foot at 9 seconds. .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming W 5 to 10 kt after midnight. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 6 seconds and E 1 foot at 9 seconds. Patchy fog after midnight with vsby 1 to 3 NM. .MON...SW winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 6 seconds and E 1 foot at 9 seconds. Patchy fog. Vsby 1 NM or less. .MON NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. Wave Detail: S 3 ft at 6 seconds and E 1 foot at 8 seconds. Patchy fog in the evening with vsby 1 NM or less. .TUE AND TUE NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 6 seconds and E 1 foot at 9 seconds. .WED...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 6 seconds and E 1 foot at 9 seconds. .WED NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. .THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. .THU NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas around 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-100300- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 NM South of Block Island- 1003 AM EDT Sun Aug 9 2026 .THIS AFTERNOON...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: S 3 ft at 6 seconds and E 1 foot at 9 seconds. .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming W 5 to 10 kt after midnight. Seas 3 to 4 ft. Wave Detail: SW 3 ft at 6 seconds and E 1 foot at 9 seconds. .MON...SW winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 6 seconds and E 1 foot at 9 seconds. Patchy fog in the morning with vsby 1 NM or less. .MON NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and E 1 foot at 9 seconds. Patchy fog in the evening with vsby 1 NM or less. .TUE AND TUE NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 6 seconds and SE 1 foot at 9 seconds. .WED...W winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 6 seconds and SE 1 foot at 9 seconds. .WED NIGHT AND THU...SW winds 10 to 15 kt. Gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. .THU NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas around 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. $$ ANZ232-100300- Nantucket Sound- 1003 AM EDT Sun Aug 9 2026 .THIS AFTERNOON...SW winds 10 to 15 kt. Gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at 9 seconds. .TONIGHT...W winds 10 to 15 kt with gusts up to 25 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and SE 1 foot at 8 seconds. .MON...W winds around 5 kt, becoming SW 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 6 seconds and E 1 foot at 9 seconds. .MON NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at 8 seconds. .TUE AND TUE NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: W 2 ft at 4 seconds and E 1 foot at 8 seconds. .WED...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 1 foot at 5 seconds and E 1 foot at 9 seconds. .WED NIGHT...SW winds around 10 kt. Seas around 2 ft. A chance of showers. .THU AND THU NIGHT...SW winds 10 to 15 kt, becoming W. Gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-100300- Vineyard Sound- 1003 AM EDT Sun Aug 9 2026 .THIS AFTERNOON...SW winds 10 to 15 kt. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 6 seconds and E 1 foot at 3 seconds. .TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 6 seconds and SE 1 foot at 7 seconds. .MON...SW winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 6 seconds and E 1 foot at 10 seconds. .MON NIGHT...SW winds around 10 kt. Gusts up to 20 kt in the evening. Seas around 2 ft. Wave Detail: SW 2 ft at 6 seconds and SE 1 foot at 9 seconds. .TUE AND TUE NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 6 seconds and SE 1 foot at 9 seconds. .WED...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 6 seconds and SE 1 foot at 13 seconds. .WED NIGHT THROUGH THU NIGHT...W 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. $$ ANZ234-100300- Buzzards Bay- 1003 AM EDT Sun Aug 9 2026 .THIS AFTERNOON...SW winds 10 to 15 kt. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SW 2 ft at 6 seconds and E 1 foot at 4 seconds. .TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt, diminishing to around 5 kt after midnight. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 6 seconds and SE 1 foot at 8 seconds. .MON...W winds around 5 kt, becoming SW 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 6 seconds and SE 1 foot at 10 seconds. .MON NIGHT...SW winds around 10 kt. Gusts up to 20 kt in the evening. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and SE 2 ft at 9 seconds. Patchy fog in the evening with vsby 1 to 3 NM. .TUE AND TUE NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and SE 1 foot at 10 seconds. .WED...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 6 seconds and SE 1 foot at 13 seconds. .WED NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. A chance of showers. .THU AND THU NIGHT...SW winds 10 to 15 kt, becoming W. Gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers and tstms. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-100300- Rhode Island Sound- 1003 AM EDT Sun Aug 9 2026 .THIS AFTERNOON...SW winds 10 to 15 kt. Gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 6 seconds. .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming W 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds. .MON...W winds around 5 kt, becoming SW 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: S 2 ft at 6 seconds and SE 1 foot at 10 seconds. .MON NIGHT...SW winds 10 to 15 kt. Seas around 2 ft. Wave Detail: S 2 ft at 7 seconds and SE 2 ft at 10 seconds. Patchy fog in the evening with vsby 1 to 3 NM. .TUE AND TUE NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 6 seconds and SE 1 foot at 10 seconds. .WED...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 6 seconds and SE 1 foot at 14 seconds. .WED NIGHT AND THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. .THU NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ237-100300- Block Island Sound- 1003 AM EDT Sun Aug 9 2026 .THIS AFTERNOON...SW winds 10 to 15 kt. Gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 6 seconds and SE 1 foot at 8 seconds. .TONIGHT...SW winds 5 to 10 kt with gusts up to 20 kt, becoming NW after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 6 seconds and SE 1 foot at 8 seconds. .MON...W winds around 5 kt, becoming SW 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: S 2 ft at 6 seconds and SE 1 foot at 9 seconds. .MON NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas around 2 ft. Wave Detail: S 2 ft at 7 seconds and SE 1 foot at 9 seconds. .TUE AND TUE NIGHT...NW winds 10 to 15 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 6 seconds and SE 1 foot at 9 seconds. .WED...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 6 seconds and SE 1 foot at 10 seconds. .WED NIGHT AND THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. A chance of showers. .THU NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-100300- Boston Harbor- 1003 AM EDT Sun Aug 9 2026 .THIS AFTERNOON...W winds around 5 kt, increasing to around 10 kt with gusts up to 20 kt. Waves around 2 ft. .TONIGHT...W winds 5 to 10 kt. Gusts up to 20 kt in the evening. Waves around 2 ft in the evening, then 1 foot or less. .MON...W winds around 5 kt, becoming S in the afternoon. Waves 1 foot or less. .MON NIGHT...SW winds 5 to 10 kt. Waves 1 foot or less. .TUE AND TUE NIGHT...NW winds 5 to 10 kt. Waves around 2 ft. .WED...NE winds 5 to 10 kt. Waves 1 foot or less. .WED NIGHT...SW winds 5 to 10 kt. Waves 1 foot or less. A chance of showers. .THU AND THU NIGHT...SW winds 5 to 10 kt, becoming W. Waves around 2 ft, then 1 foot or less. A chance of showers and tstms. 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. $$ ANZ236-100300- Narragansett Bay- 1003 AM EDT Sun Aug 9 2026 .THIS AFTERNOON...SW winds 5 to 10 kt. Gusts up to 20 kt. Waves around 2 ft. .TONIGHT...W winds 5 to 10 kt. Waves around 2 ft. .MON...W winds around 5 kt, becoming S with gusts up to 20 kt in the afternoon. Waves around 2 ft. .MON NIGHT...SW winds 5 to 10 kt. Waves around 2 ft. .TUE AND TUE NIGHT...NW winds 5 to 10 kt. Waves around 2 ft. .WED...NW winds 5 to 10 kt. Waves around 2 ft. .WED NIGHT AND THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. A chance of showers. .THU NIGHT...W winds 5 to 10 kt. Waves around 2 ft. A chance of showers and tstms. Winds and waves higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ280-100300- Ocean Waters from the Merrimack River to Plymouth from 40 to 60 NM- 1003 AM EDT Sun Aug 9 2026 .THIS AFTERNOON...SW winds around 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 6 seconds and E 1 foot at 9 seconds. .TONIGHT...SW winds around 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: W 2 ft at 6 seconds and E 1 foot at 9 seconds. .MON...NW winds around 5 kt, becoming S 10 to 15 kt in the afternoon. Seas around 2 ft. Wave Detail: S 2 ft at 6 seconds and E 1 foot at 9 seconds. .MON NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 5 seconds and E 1 foot at 9 seconds. .TUE...W winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: W 3 ft at 5 seconds and SE 1 foot at 10 seconds. .TUE NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: W 2 ft at 5 seconds and SE 1 foot at 10 seconds. .WED AND WED NIGHT...N winds 5 to 10 kt, becoming S. Seas around 2 ft. .THU AND THU NIGHT...SW winds 5 to 10 kt, becoming W 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. 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. $$ ANZ281-100300- Ocean Waters from Provincetown to Nantucket from 20 to 60 NM- 1003 AM EDT Sun Aug 9 2026 .THIS AFTERNOON...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: SW 3 ft at 6 seconds and E 1 foot at 9 seconds. .TONIGHT...SW winds 10 to 15 kt, becoming W 5 to 10 kt after midnight. Gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: SW 3 ft at 6 seconds and E 1 foot at 9 seconds. Patchy fog. Vsby 1 to 3 NM, decreasing to 1 NM or less after midnight. .MON...W winds around 5 kt, becoming SW in the afternoon. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 6 seconds and E 1 foot at 8 seconds. Patchy fog. Vsby 1 NM or less. .MON NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 6 seconds and E 1 foot at 9 seconds. Patchy fog in the evening. A chance of showers after midnight. Vsby 1 NM or less in the evening. .TUE AND TUE NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 6 seconds and E 1 foot at 9 seconds. .WED AND WED NIGHT...NW winds 5 to 10 kt, becoming SW. Seas 2 to 3 ft. Wave Detail: W 3 ft at 6 seconds and E 2 ft at 10 seconds. .THU AND THU NIGHT...SW winds 10 to 15 kt, becoming W. Gusts up to 20 kt. Seas 2 to 4 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ282-100300- Ocean Waters from Marthas Vineyard to Nantucket from 25 to 60 NM- 1003 AM EDT Sun Aug 9 2026 .THIS AFTERNOON...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 4 ft. Wave Detail: SW 4 ft at 6 seconds and E 1 foot at 9 seconds. .TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: SW 4 ft at 6 seconds and E 1 foot at 9 seconds. Patchy fog. Vsby 1 to 3 NM. .MON...SW winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Seas 3 to 4 ft. Wave Detail: SW 3 ft at 6 seconds and E 1 foot at 9 seconds. Patchy fog. Vsby 1 NM or less. .MON NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 3 ft. Wave Detail: S 3 ft at 6 seconds and E 1 foot at 8 seconds. Patchy fog in the evening with vsby 1 NM or less. .TUE AND TUE NIGHT...W winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 6 seconds and E 1 foot at 9 seconds. .WED AND WED NIGHT...W winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 6 seconds and E 1 foot at 9 seconds. A chance of showers. .THU AND THU NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 3 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. $$ ANZ283-100300- Ocean Waters from Montauk NY to Marthas Vineyard from 25 to 60 NM- 1003 AM EDT Sun Aug 9 2026 .THIS AFTERNOON...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 4 ft. Wave Detail: SW 4 ft at 6 seconds and E 1 foot at 9 seconds. .TONIGHT...SW winds 10 to 15 kt, becoming W 5 to 10 kt after midnight. Gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: SW 3 ft at 6 seconds and E 1 foot at 9 seconds. .MON...SW winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: S 3 ft at 6 seconds and E 1 foot at 9 seconds. Patchy fog. Vsby 1 NM or less. .MON NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and E 1 foot at 9 seconds. Patchy fog in the evening with vsby 1 NM or less. .TUE AND TUE NIGHT...W winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 6 seconds and SE 1 foot at 9 seconds. .WED...W winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 6 seconds and E 1 foot at 9 seconds. .WED NIGHT...SW winds 5 to 10 kt. Seas 3 to 4 ft. A chance of showers. .THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 3 ft. A chance of showers and tstms. .THU NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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