Coastal Waters Forecast
Issued by NWS Boston, MA

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969 FZUS51 KBOX 190203 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 1003 PM EDT Tue Jun 18 2024 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-191500- 1003 PM EDT Tue Jun 18 2024 .Synopsis for Massachusetts and Rhode Island coastal waters... High pres remains anchored over the far eastern outer waters through the end of the workweek. This will maintain SSW wind gusts 20-25 knots on most waters through Thursday, turning northeast Friday and Saturday. Dry weather is expected until later Friday then scattered showers and thunderstorms are possible through Monday. $$ ANZ250-191500- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 1003 PM EDT Tue Jun 18 2024 .OVERNIGHT...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and SE 1 foot at 11 seconds. .WED...SW winds 10 to 15 kt, becoming S 15 to 20 kt in the afternoon. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and SE 1 foot at 11 seconds. .WED NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: S 3 ft at 4 seconds and SE 2 ft at 10 seconds. .THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and SE 2 ft at 9 seconds. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and SE 2 ft at 9 seconds. A chance of showers. .FRI AND FRI NIGHT...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NW 2 ft at 3 seconds and SE 2 ft at 9 seconds. A chance of showers. .SAT...SE winds 5 to 10 kt. Seas around 2 ft. A chance of showers. .SAT NIGHT...S winds around 10 kt. Seas around 2 ft. A chance of showers. .SUN...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. A chance of showers. .SUN NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-191500- Massachusetts Bay and Ipswich Bay- 1003 PM EDT Tue Jun 18 2024 .OVERNIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: S 2 ft at 3 seconds and E 1 foot at 11 seconds. .WED...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and E 1 foot at 10 seconds. .WED NIGHT...SW 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 E 1 foot at 10 seconds. .THU...SW winds around 10 kt. Gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and E 1 foot at 9 seconds. .THU NIGHT...W winds 5 to 10 kt. Gusts up to 20 kt in the evening. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and E 1 foot at 9 seconds. A chance of showers. .FRI AND FRI NIGHT...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NE 2 ft at 6 seconds and NW 1 foot at 3 seconds. A chance of showers. .SAT...SE winds 5 to 10 kt. Seas 1 foot or less. A chance of showers. .SAT NIGHT THROUGH SUN NIGHT...SW 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. $$ ANZ231-191500- Cape Cod Bay- 1003 PM EDT Tue Jun 18 2024 .OVERNIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and SE 1 foot at 11 seconds. .WED...SW winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and SE 1 foot at 11 seconds. .WED NIGHT...SW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and SE 1 foot at 10 seconds. .THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and SE 1 foot at 9 seconds. .THU NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and SE 1 foot at 9 seconds. A chance of showers. .FRI...NW winds 5 to 10 kt, becoming NE in the afternoon. Seas 1 foot or less. Wave Detail: NW 1 foot at 2 seconds and SE 1 foot at 8 seconds. A chance of showers. .FRI NIGHT...E winds around 5 kt. Seas 1 foot or less. .SAT...SE winds 5 to 10 kt. Seas 1 foot or less. .SAT NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. A chance of showers. .SUN AND SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-191500- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 1003 PM EDT Tue Jun 18 2024 .OVERNIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and SE 2 ft at 11 seconds. .WED...SW winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and SE 2 ft at 11 seconds. .WED NIGHT...SW winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and SE 2 ft at 10 seconds. Patchy fog after midnight with vsby 1 to 3 NM. .THU...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and SE 2 ft at 9 seconds. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 5 seconds and SE 2 ft at 9 seconds. A chance of showers after midnight. .FRI AND FRI NIGHT...E winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: W 3 ft at 4 seconds and SE 2 ft at 8 seconds. .SAT...SE winds 5 to 10 kt. Seas around 2 ft. .SAT NIGHT...S winds around 10 kt. Seas around 2 ft. A chance of showers. .SUN...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. A chance of showers. .SUN NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 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. $$ ANZ255-191500- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 1003 PM EDT Tue Jun 18 2024 .OVERNIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 5 seconds and SE 2 ft at 11 seconds. .WED...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and SE 2 ft at 11 seconds. .WED NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and SE 2 ft at 10 seconds. Patchy fog. Vsby 1 to 3 NM. .THU...SW winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and SE 2 ft at 9 seconds. .THU NIGHT...SW winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 5 seconds and SE 2 ft at 8 seconds. .FRI AND FRI NIGHT...SE winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 5 seconds and SE 2 ft at 8 seconds. .SAT...SE winds 5 to 10 kt. Seas around 2 ft. .SAT NIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers. .SUN...S winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. A chance of showers. .SUN NIGHT...SW winds 20 to 25 kt. Seas 4 to 6 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-191500- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 1003 PM EDT Tue Jun 18 2024 .OVERNIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and SE 2 ft at 11 seconds. .WED...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and SE 2 ft at 11 seconds. .WED NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 3 ft. Wave Detail: SW 3 ft at 4 seconds and SE 2 ft at 10 seconds. Patchy fog. Vsby 1 to 3 NM. .THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 3 ft. Wave Detail: SW 3 ft at 4 seconds and SE 2 ft at 9 seconds. Patchy fog in the morning with vsby 1 to 3 NM. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 3 ft. Wave Detail: SW 3 ft at 4 seconds and SE 2 ft at 8 seconds. .FRI...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 5 seconds and SE 2 ft at 8 seconds. A chance of showers. .FRI NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. .SAT...SE winds 5 to 10 kt. Seas around 2 ft. .SAT NIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers. .SUN...S winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 4 ft. A chance of showers. .SUN NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 7 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. $$ ANZ232-191500- Nantucket Sound- 1003 PM EDT Tue Jun 18 2024 .OVERNIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and SE 1 foot at 11 seconds. .WED...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and SE 1 foot at 11 seconds. .WED NIGHT...SW winds around 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at 10 seconds. Patchy fog after midnight with vsby 1 to 3 NM. .THU...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and SE 1 foot at 9 seconds. .THU NIGHT...SW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and SE 1 foot at 9 seconds. .FRI AND FRI NIGHT...SE winds 10 to 15 kt. Seas around 2 ft. Wave Detail: W 2 ft at 4 seconds and SE 1 foot at 8 seconds. .SAT...SE winds 5 to 10 kt. Seas 1 foot or less. .SAT NIGHT...S winds 10 to 15 kt. Seas around 2 ft. A chance of showers. .SUN AND SUN NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-191500- Vineyard Sound- 1003 PM EDT Tue Jun 18 2024 .OVERNIGHT...SW winds around 10 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and SE 1 foot at 11 seconds. .WED...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at 11 seconds. .WED NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at 10 seconds. Patchy fog. Vsby 1 to 3 NM. .THU...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and SE 1 foot at 9 seconds. Patchy fog in the morning with vsby 1 to 3 NM. .THU NIGHT...SW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 5 seconds and SE 1 foot at 9 seconds. .FRI AND FRI NIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and SE 1 foot at 8 seconds. A chance of showers. .SAT...SE winds 5 to 10 kt. Seas 1 foot or less. .SAT NIGHT...S winds around 10 kt. Seas around 2 ft. A chance of showers. .SUN...S winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. A chance of showers. .SUN NIGHT...SW winds 15 to 20 kt with gusts up to 25 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. $$ ANZ234-191500- Buzzards Bay- 1003 PM EDT Tue Jun 18 2024 .OVERNIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at 11 seconds. .WED...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at 11 seconds. .WED NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at 10 seconds. Patchy fog. Vsby 1 to 3 NM. .THU...SW winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and SE 1 foot at 9 seconds. .THU NIGHT...SW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and SE 1 foot at 9 seconds. .FRI AND FRI NIGHT...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and SE 1 foot at 8 seconds. A chance of showers. .SAT...SE winds 5 to 10 kt. Seas 1 foot or less. .SAT NIGHT...S winds around 10 kt. Seas around 2 ft. A chance of showers. .SUN AND SUN NIGHT...S winds 10 to 15 kt, becoming SW 15 to 20 kt. Gusts up to 25 kt. Seas 2 to 4 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-191500- Rhode Island Sound- 1003 PM EDT Tue Jun 18 2024 .OVERNIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 5 seconds and SE 1 foot at 11 seconds. .WED...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and SE 1 foot at 11 seconds. .WED NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and SE 1 foot at 10 seconds. Patchy fog. Vsby 1 to 3 NM. .THU...SW winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and SE 2 ft at 9 seconds. Patchy fog in the morning with vsby 1 to 3 NM. .THU NIGHT...SW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 5 seconds and SE 2 ft at 8 seconds. .FRI AND FRI NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 5 seconds and SE 2 ft at 8 seconds. A chance of showers. .SAT...SE winds 5 to 10 kt. Seas around 2 ft. .SAT NIGHT...S winds 10 to 15 kt. Seas around 2 ft. A chance of showers. .SUN...S winds 15 to 20 kt. Seas 2 to 4 ft. A chance of showers. .SUN NIGHT...SW winds 15 to 20 kt with gusts up to 25 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. $$ ANZ237-191500- Block Island Sound- 1003 PM EDT Tue Jun 18 2024 .OVERNIGHT...SW winds around 10 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and SE 2 ft at 10 seconds. .WED...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at 11 seconds. .WED NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at 10 seconds. Patchy fog. Vsby 1 to 3 NM. .THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and SE 2 ft at 9 seconds. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and SE 2 ft at 9 seconds. .FRI AND FRI NIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 2 ft at 5 seconds and S 2 ft at 8 seconds. A chance of showers. .SAT...SE winds 5 to 10 kt. Seas around 2 ft. .SAT NIGHT...S winds around 10 kt. Seas around 2 ft. A chance of showers. .SUN...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. A chance of showers. .SUN NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-191500- Boston Harbor- 1003 PM EDT Tue Jun 18 2024 .OVERNIGHT...SW winds 10 to 15 kt. Waves around 2 ft. .WED...SW winds 10 to 15 kt. Waves 1 foot or less, then around 2 ft in the afternoon. .WED NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the evening. Waves around 2 ft. .THU...SW winds around 10 kt. Waves 1 foot or less. .THU NIGHT...W winds 5 to 10 kt. Waves 1 foot or less. A chance of showers. .FRI AND FRI NIGHT...E winds 5 to 10 kt. Waves 1 foot or less. A chance of showers. .SAT...E winds 5 to 10 kt. Waves 1 foot or less. A chance of showers. .SAT NIGHT THROUGH SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Waves 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. $$ ANZ236-191500- Narragansett Bay- 1003 PM EDT Tue Jun 18 2024 .OVERNIGHT...SW winds 5 to 10 kt. Waves around 2 ft. .WED...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Waves around 2 ft. .WED NIGHT...SW winds 10 to 15 kt. Waves around 2 ft. Patchy fog after midnight with vsby 1 to 3 NM. .THU...SW winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Waves 2 to 3 ft. .FRI...NW winds 5 to 10 kt, becoming E in the afternoon. Waves around 2 ft. A chance of showers. .FRI NIGHT...E winds 5 to 10 kt. Waves around 2 ft. A chance of showers in the evening. .SAT...SE winds 5 to 10 kt. Waves around 2 ft. .SAT NIGHT AND SUN...S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft. A chance of showers. .SUN NIGHT...SW winds around 15 kt with gusts up to 20 kt. Waves 3 to 5 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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