Coastal Waters Forecast
Issued by NWS Boston, MA

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055 FZUS51 KBOX 300504 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 103 AM EDT Thu May 30 2024 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-301800- 103 AM EDT Thu May 30 2024 .Synopsis for Massachusetts and Rhode Island coastal waters... A wave of low pres tracks across the waters overnight into Thu morning bringing widespread rain and NE winds. A ridge of high pres then builds in from the west Fri into the weekend...bringing dry pleasant boating weather to the region. This high pres ridge will shift east of the region early next week. $$ ANZ250-301800- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 103 AM EDT Thu May 30 2024 .REST OF TONIGHT...NE winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds. A chance of showers. .THU...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: NE 4 ft at 6 seconds and N 1 foot at 3 seconds. Showers likely, mainly in the morning. Patchy fog in the afternoon with vsby 1 to 3 NM. .THU NIGHT...N winds 10 to 15 kt. Seas 3 to 5 ft, subsiding to 2 to 3 ft after midnight. Wave Detail: N 3 ft at 5 seconds, becoming NE 3 ft at 7 seconds and N 1 foot at 4 seconds. A chance of showers in the evening. .FRI...N winds 5 to 10 kt, becoming SE in the afternoon. Seas 2 to 3 ft. Wave Detail: NE 3 ft at 7 seconds and N 2 ft at 3 seconds. .FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds and NW 1 foot at 3 seconds. .SAT AND SAT NIGHT...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 7 seconds and N 1 foot at 3 seconds. .SUN THROUGH MON NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-301800- Massachusetts Bay and Ipswich Bay- 103 AM EDT Thu May 30 2024 .REST OF TONIGHT...NE winds 5 to 10 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: E 2 ft at 8 seconds. A chance of showers with isolated tstms. Some tstms may produce heavy rainfall. .THU...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: E 3 ft at 8 seconds and N 1 foot at 3 seconds. Showers likely, mainly in the morning. Patchy fog in the afternoon. Vsby 1 to 3 NM. .THU NIGHT...N winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: N 3 ft at 5 seconds. .FRI...N winds 5 to 10 kt, becoming E in the afternoon. Seas around 2 ft. Wave Detail: NE 2 ft at 6 seconds and N 1 foot at 3 seconds. .FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: E 2 ft at 6 seconds and SW 1 foot at 2 seconds, becoming NW 1 foot at 2 seconds and E 1 foot at 6 seconds. .SAT AND SAT NIGHT...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NE 2 ft at 6 seconds and NW 1 foot at 3 seconds. .SUN THROUGH MON NIGHT...SW winds 5 to 10 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. $$ ANZ231-301800- Cape Cod Bay- 103 AM EDT Thu May 30 2024 .REST OF TONIGHT...SE winds around 5 kt. Seas 1 foot or less. Wave Detail: SE 1 foot at 8 seconds. A slight chance of showers. .THU...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: E 2 ft at 7 seconds and N 1 foot at 3 seconds. Showers likely, mainly in the morning. Patchy fog in the afternoon. Vsby 1 to 3 NM. .THU NIGHT...N winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 4 ft. Wave Detail: N 2 ft at 4 seconds. A chance of showers in the evening. .FRI...N winds around 10 kt, becoming NE in the afternoon. Seas around 2 ft. Wave Detail: N 2 ft at 4 seconds. .FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas 1 foot or less. Wave Detail: NW 1 foot at 3 seconds and NE 1 foot at 5 seconds. .SAT AND SAT NIGHT...NW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: N 1 foot at 4 seconds. .SUN THROUGH MON NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-301800- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 103 AM EDT Thu May 30 2024 .REST OF TONIGHT...S winds around 5 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds. Patchy fog. Vsby 1 NM or less. .THU...E winds 5 to 10 kt, becoming N with gusts up to 20 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: SE 3 ft at 8 seconds and N 1 foot at 3 seconds. Patchy fog. A chance of showers in the afternoon. Vsby 1 NM or less. .THU NIGHT...N winds around 10 kt. Seas 2 to 4 ft. Wave Detail: SE 3 ft at 7 seconds and N 2 ft at 4 seconds. Patchy fog. Vsby 1 to 3 NM. .FRI...N winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: E 3 ft at 7 seconds and N 2 ft at 4 seconds. .FRI NIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 6 seconds and NW 1 foot at 4 seconds. .SAT AND SAT NIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at 6 seconds and NW 1 foot at 3 seconds. .SUN THROUGH MON 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. $$ ANZ255-301800- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 103 AM EDT Thu May 30 2024 .REST OF TONIGHT...S winds around 5 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds. Patchy fog. Vsby 1 NM or less. .THU...W winds 5 to 10 kt, becoming N 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds and N 1 foot at 2 seconds. Patchy fog in the afternoon. .THU NIGHT...N winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 4 ft. Wave Detail: SE 3 ft at 7 seconds and NW 2 ft at 3 seconds. Patchy fog. Vsby 1 to 3 NM. .FRI...N winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: NE 3 ft at 6 seconds and NW 2 ft at 3 seconds. .FRI NIGHT...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds and W 1 foot at 3 seconds. .SAT AND SAT NIGHT...NW winds around 10 kt. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 3 seconds and NE 2 ft at 6 seconds. .SUN THROUGH MON NIGHT...SW winds around 10 kt. Seas 2 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-301800- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 103 AM EDT Thu May 30 2024 .REST OF TONIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds. A chance of showers. .THU...NW winds 5 to 10 kt, becoming N 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: SE 3 ft at 8 seconds and N 2 ft at 3 seconds. A chance of showers in the morning. .THU NIGHT...N winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 4 ft. Wave Detail: E 3 ft at 7 seconds and NW 2 ft at 3 seconds. .FRI...N winds 5 to 10 kt, becoming NE in the afternoon. Seas 2 to 3 ft. Wave Detail: NE 2 ft at 6 seconds and N 1 foot at 3 seconds. .FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds and W 1 foot at 3 seconds. .SAT AND SAT NIGHT...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 7 seconds and NW 1 foot at 3 seconds. .SUN THROUGH MON 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. $$ ANZ232-301800- Nantucket Sound- 103 AM EDT Thu May 30 2024 .REST OF TONIGHT...S winds around 5 kt. Seas around 2 ft. Wave Detail: SW 1 foot at 2 seconds and SE 1 foot at 8 seconds. Patchy fog. A slight chance of showers. Vsby 1 to 3 NM. .THU...N winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SW 1 foot at 2 seconds and SE 1 foot at 8 seconds. A chance of showers in the morning. Patchy fog in the afternoon. .THU NIGHT...N winds around 10 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. Wave Detail: N 2 ft at 5 seconds. Patchy fog in the evening. .FRI...N winds around 10 kt, becoming NE in the afternoon. Seas around 2 ft. Wave Detail: N 1 foot at 4 seconds. .FRI NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas 1 foot or less. Wave Detail: W 1 foot at 3 seconds and E 1 foot at 6 seconds. .SAT AND SAT NIGHT...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NW 1 foot at 3 seconds and NE 1 foot at 6 seconds. .SUN THROUGH MON NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-301800- Vineyard Sound- 103 AM EDT Thu May 30 2024 .REST OF TONIGHT...S winds around 5 kt. Seas around 2 ft. Wave Detail: S 2 ft at 7 seconds and SW 1 foot at 3 seconds. A chance of showers. .THU...N 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: NW 1 foot at 3 seconds and SE 1 foot at 7 seconds. A chance of showers in the morning. .THU NIGHT...N 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: N 1 foot at 4 seconds. .FRI...N winds around 10 kt, becoming E in the afternoon. Seas 1 foot or less. Wave Detail: NW 1 foot at 3 seconds and NE 1 foot at 5 seconds. .FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas 1 foot or less. Wave Detail: SW 1 foot at 2 seconds and SE 1 foot at 6 seconds. .SAT AND SAT NIGHT...NW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: NW 1 foot at 3 seconds and NE 1 foot at 7 seconds. .SUN THROUGH MON NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ234-301800- Buzzards Bay- 103 AM EDT Thu May 30 2024 .REST OF TONIGHT...S winds around 5 kt. Seas 1 foot or less. Wave Detail: SW 1 foot at 4 seconds and S 1 foot at 7 seconds. A chance of showers. .THU...N winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: SE 1 foot at 7 seconds, becoming N 1 foot at 4 seconds. Patchy fog in the morning. Showers likely in the morning. .THU NIGHT...N winds 5 to 10 kt. Gusts up to 20 kt in the evening. Seas around 2 ft. Wave Detail: N 1 foot at 4 seconds. .FRI...N winds 5 to 10 kt, becoming E in the afternoon. Seas 1 foot or less. Wave Detail: N 1 foot at 4 seconds. .FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas 1 foot or less. Wave Detail: SW 1 foot at 2 seconds and SE 1 foot at 6 seconds. .SAT AND SAT NIGHT...NW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: NW 1 foot at 3 seconds and NE 1 foot at 6 seconds. .SUN THROUGH MON NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-301800- Rhode Island Sound- 103 AM EDT Thu May 30 2024 .REST OF TONIGHT...SW winds around 5 kt. Seas around 2 ft. Wave Detail: S 2 ft at 7 seconds. A chance of showers. .THU...NW winds 5 to 10 kt, becoming N 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds and NW 1 foot at 3 seconds. A chance of showers in the morning. .THU NIGHT...N 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: NE 3 ft at 6 seconds and NW 1 foot at 3 seconds. .FRI...N winds 5 to 10 kt, becoming E in the afternoon. Seas around 2 ft. Wave Detail: E 2 ft at 6 seconds and NW 1 foot at 3 seconds. .FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: SE 2 ft at 7 seconds and SW 1 foot at 3 seconds, becoming W 1 foot at 3 seconds and SE 1 foot at 7 seconds. .SAT AND SAT NIGHT...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds and NW 1 foot at 3 seconds. .SUN THROUGH MON 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. $$ ANZ237-301800- Block Island Sound- 103 AM EDT Thu May 30 2024 .REST OF TONIGHT...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 8 seconds and W 1 foot at 3 seconds. Showers likely. .THU...NW winds 5 to 10 kt, becoming N 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds and NW 1 foot at 2 seconds. A chance of showers in the morning. .THU NIGHT...N winds 5 to 10 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. Wave Detail: NE 3 ft at 7 seconds and NW 1 foot at 3 seconds. .FRI...N winds 5 to 10 kt, becoming S in the afternoon. Seas around 2 ft. Wave Detail: E 2 ft at 7 seconds and NW 1 foot at 2 seconds. .FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas 1 foot or less. Wave Detail: SW 1 foot at 2 seconds and SE 1 foot at 7 seconds. .SAT AND SAT NIGHT...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 7 seconds and NW 1 foot at 2 seconds. .SUN THROUGH MON NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-301800- Boston Harbor- 103 AM EDT Thu May 30 2024 .REST OF TONIGHT...NE winds 5 to 10 kt with gusts up to 20 kt. Waves 1 foot or less. A chance of showers with isolated tstms. Some tstms may produce heavy rainfall. .THU...N winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. Showers, mainly in the morning. Patchy fog in the afternoon. Vsby 1 to 3 NM. .THU NIGHT...N winds 5 to 10 kt. Waves around 2 ft in the evening, then 1 foot or less. .FRI...N winds 5 to 10 kt, becoming E in the afternoon. Waves 1 foot or less. .FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Waves 1 foot or less. .SAT AND SAT NIGHT...NW winds 5 to 10 kt. Waves 1 foot or less. .SUN THROUGH MON 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. $$ ANZ236-301800- Narragansett Bay- 103 AM EDT Thu May 30 2024 .REST OF TONIGHT...NW winds around 5 kt. Waves around 2 ft. A chance of showers. .THU...N winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Waves 1 foot or less, then around 2 ft in the afternoon. Showers likely in the morning. .THU NIGHT...N winds 5 to 10 kt. Waves around 2 ft. .FRI...N winds 5 to 10 kt, becoming E in the afternoon. Waves around 2 ft. .FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Waves 1 foot or less. .SAT AND SAT NIGHT...NW winds 5 to 10 kt. Waves 1 foot or less. .SUN THROUGH MON NIGHT...SW winds 5 to 10 kt. Waves around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ For the latest updates...please visit our webpage at www.weather.gov/boston You can follow us on Facebook at www.facebook.com/NWSBoston You can follow us on Twitter at @NWSBoston