Coastal Waters Forecast
Issued by NWS Boston, MA

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000 FZUS51 KBOX 211352 CWFBOX Coastal Waters Forecast National Weather Service Boston/Norton MA 952 AM EDT Sat Jul 21 2018 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-220230- 952 AM EDT Sat Jul 21 2018 .Synopsis for Massachusetts and Rhode Island coastal waters... Winds around high pressure over the Gulf of Maine usher marine stratus and fog across the southeastern waters today. Low pres off the mid-atlantic coast will lift north tonight and Sunday bringing a tropical airmass accompanied by showers, tstms and gusty SE winds. Bermuda high pres will build west Mon through Thu keeping the tropical airmass connection over the waters. For information on possible hazardous weather beyond the 24-36 hour forecast period, please visit www.weather.gov/boston and follow the Current Hazards link above the map on the left. $$ ANZ250-220230- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 952 AM EDT Sat Jul 21 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH SUNDAY AFTERNOON... .THIS AFTERNOON...E winds 5 to 10 kt. Seas 2 to 3 ft. .TONIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. A chance of showers. Vsby 1 to 3 NM. .SUN...SE winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 6 ft. Patchy fog. Numerous showers and scattered tstms. Some tstms may produce gusty winds and heavy rainfall. Vsby 1 to 3 NM. .SUN NIGHT...SE winds 15 to 20 kt, becoming S 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 4 to 7 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .MON...S winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 6 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .MON NIGHT...S winds 10 to 15 kt. Seas 3 to 5 ft. .TUE...S winds 10 to 15 kt. Seas 2 to 4 ft. .TUE NIGHT...S winds 10 to 15 kt. Seas 3 to 5 ft. .WED...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. .WED NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. A chance of showers. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-220230- Massachusetts Bay and Ipswich Bay- 952 AM EDT Sat Jul 21 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH SUNDAY AFTERNOON... .THIS AFTERNOON...E winds 5 to 10 kt. Seas 2 to 3 ft. .TONIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Numerous showers. .SUN...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Patchy fog. Widespread showers and numerous tstms. Some tstms may produce gusty winds and heavy rainfall. Vsby 1 NM or less. .SUN NIGHT...SE winds 10 to 15 kt with gusts up to 20 kt, becoming S 5 to 10 kt after midnight. Seas 3 to 5 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .MON...S winds 5 to 10 kt. Seas 3 to 5 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .MON NIGHT...S winds 5 to 10 kt. Seas 2 to 4 ft. .TUE...S winds 5 to 10 kt. Seas 2 to 4 ft. .TUE NIGHT...S winds 5 to 10 kt. Seas 2 to 4 ft. .WED...S winds 5 to 10 kt. Seas 2 to 4 ft. .WED NIGHT...S winds 5 to 10 kt. Seas 2 to 4 ft. A chance of showers. 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. $$ ANZ231-220230- Cape Cod Bay- 952 AM EDT Sat Jul 21 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH SUNDAY AFTERNOON... .THIS AFTERNOON...E winds 5 to 10 kt. Seas around 2 ft. .TONIGHT...E winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas around 2 ft. A chance of showers and scattered tstms. Some tstms may produce gusty winds and heavy rainfall. .SUN...SE winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to 3 ft. Numerous showers and scattered tstms. Some tstms may produce gusty winds and heavy rainfall. Vsby 1 to 3 NM. .SUN NIGHT...S winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 2 to 3 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .MON...S winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .MON NIGHT...S winds 5 to 10 kt. Seas around 2 ft. .TUE...S winds 5 to 10 kt. Seas around 2 ft. .TUE NIGHT...S winds 5 to 10 kt. Seas around 2 ft. .WED...S winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .WED NIGHT...S winds 5 to 10 kt. Seas around 2 ft. A chance of showers. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-220230- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 952 AM EDT Sat Jul 21 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH SUNDAY AFTERNOON... .THIS AFTERNOON...E winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .TONIGHT...E winds 10 to 15 kt, becoming SE 15 to 20 kt after midnight. Gusts up to 25 kt. Seas 2 to 4 ft. Patchy fog. Scattered showers. Vsby 1 to 3 NM. .SUN...SE winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 7 ft. Scattered showers. Vsby 1 to 3 NM. .SUN NIGHT...SE winds 15 to 20 kt with gusts up to 30 kt, becoming S 10 to 15 kt with gusts up to 20 kt after midnight. Seas 4 to 7 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .MON...S winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 6 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM. .MON NIGHT...S winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas 3 to 5 ft. .TUE...S winds 5 to 10 kt. Seas 3 to 5 ft. .TUE NIGHT...S winds around 10 kt. Seas 3 to 5 ft. .WED...S winds 10 to 15 kt. Seas 3 to 4 ft. .WED NIGHT...S winds 10 to 15 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. $$ ANZ255-220230- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 952 AM EDT Sat Jul 21 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH SUNDAY AFTERNOON... .THIS AFTERNOON...E winds 10 to 15 kt. Gusts up to 20 kt. Seas 2 to 4 ft. Patchy fog early with vsby 1 NM or less. .TONIGHT...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM. .SUN...SE winds 15 to 20 kt with gusts up to 30 kt. Seas 5 to 8 ft. Scattered showers. Vsby 1 to 3 NM. .SUN NIGHT...SE winds 15 to 20 kt, becoming S 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 6 to 9 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .MON...S winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 7 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM. .MON NIGHT...S winds 10 to 15 kt. Seas 4 to 6 ft. .TUE...S winds around 10 kt. Seas 3 to 5 ft. .TUE NIGHT...S winds around 10 kt. Seas 3 to 4 ft. .WED...S winds around 10 kt. Seas 3 to 4 ft. .WED NIGHT...S winds 10 to 15 kt. Seas 3 to 5 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-220230- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 952 AM EDT Sat Jul 21 2018 ...GALE WATCH IN EFFECT FROM LATE TONIGHT THROUGH SUNDAY AFTERNOON... .THIS AFTERNOON...E winds 10 to 15 kt. Gusts up to 20 kt. Seas 3 to 4 ft. .TONIGHT...E winds 15 to 20 kt with gusts up to 30 kt. Seas 5 to 8 ft. Patchy fog. Numerous showers and scattered tstms. Some tstms may produce gusty winds and heavy rainfall. Vsby 1 to 3 NM. .SUN...SE winds 15 to 20 kt with gusts up to 35 kt. Seas 7 to 10 ft. Numerous showers and scattered tstms. Some tstms may produce gusty winds and heavy rainfall. Vsby 1 to 3 NM. .SUN NIGHT...SE winds 15 to 20 kt, becoming S 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 6 to 9 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .MON...S winds 10 to 15 kt with gusts up to 20 kt. Seas 5 to 8 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM. .MON NIGHT...S winds 10 to 15 kt. Seas 4 to 6 ft. .TUE...S winds around 10 kt. Seas 4 to 5 ft. .TUE NIGHT...S winds around 10 kt. Seas 3 to 5 ft. .WED...S winds around 10 kt. Seas around 4 ft. .WED NIGHT...S winds 10 to 15 kt. Seas 4 to 6 ft. A chance of showers. 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. $$ ANZ232-220230- Nantucket Sound- 952 AM EDT Sat Jul 21 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH SUNDAY AFTERNOON... .THIS AFTERNOON...E winds 5 to 10 kt, increasing to 10 to 15 kt. Seas 2 to 3 ft. .TONIGHT...E winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. Patchy fog. A chance of showers and scattered tstms. Some tstms may produce gusty winds and heavy rainfall. Vsby 1 to 3 NM. .SUN...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Numerous showers and scattered tstms. Some tstms may produce gusty winds and heavy rainfall. Vsby 1 to 3 NM. .SUN NIGHT...SE winds 15 to 20 kt with gusts up to 30 kt, becoming S 10 to 15 kt with gusts up to 20 kt after midnight. Seas 2 to 4 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .MON...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .MON NIGHT...S winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. .TUE...S winds 5 to 10 kt. Seas 2 to 3 ft. .TUE NIGHT...S winds around 10 kt. Seas around 2 ft. .WED...S winds 10 to 15 kt. Seas around 2 ft. .WED NIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-220230- Vineyard Sound- 952 AM EDT Sat Jul 21 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH SUNDAY AFTERNOON... .THIS AFTERNOON...E winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .TONIGHT...E winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Patchy fog. Numerous showers and scattered tstms. Some tstms may produce gusty winds and heavy rainfall. Vsby 1 to 3 NM. .SUN...SE winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. Patchy fog. Widespread showers and numerous tstms. Some tstms may produce gusty winds and heavy rainfall. Vsby 1 to 3 NM. .SUN NIGHT...SE winds 15 to 20 kt, becoming S 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 2 to 4 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM. .MON...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM. .MON NIGHT...S winds 10 to 15 kt. Seas 2 to 4 ft. .TUE...S winds around 10 kt. Seas 2 to 3 ft. .TUE NIGHT...S winds around 10 kt. Seas 2 to 3 ft. .WED...S winds 10 to 15 kt. Seas 2 to 3 ft. .WED NIGHT...S winds around 10 kt. Seas 2 to 3 ft. A chance of showers. 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. $$ ANZ234-220230- Buzzards Bay- 952 AM EDT Sat Jul 21 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH SUNDAY AFTERNOON... .THIS AFTERNOON...E winds 5 to 10 kt, increasing to 10 to 15 kt. Seas 2 to 3 ft. .TONIGHT...E winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Showers likely with scattered tstms. Some tstms may produce gusty winds and heavy rainfall. .SUN...SE winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to 4 ft. Patchy fog. Widespread showers and numerous tstms. Some tstms may produce gusty winds and heavy rainfall. Vsby 1 to 3 NM. .SUN NIGHT...S winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM. .MON...S winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM. .MON NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. .TUE...S winds 5 to 10 kt. Seas 2 to 3 ft. .TUE NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. .WED...S winds 5 to 10 kt. Seas around 2 ft. .WED NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-220230- Rhode Island Sound- 952 AM EDT Sat Jul 21 2018 ...GALE WATCH IN EFFECT FROM LATE TONIGHT THROUGH SUNDAY AFTERNOON... .THIS AFTERNOON...E winds 10 to 15 kt. Gusts up to 20 kt. Seas 2 to 4 ft. .TONIGHT...E winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. Patchy fog. Showers likely with scattered tstms. Some tstms may produce gusty winds and heavy rainfall. .SUN...SE winds 15 to 20 kt with gusts up to 35 kt. Seas 5 to 8 ft. Patchy fog. Numerous showers and scattered tstms. Some tstms may produce gusty winds and heavy rainfall. Vsby 1 to 3 NM. .SUN NIGHT...SE winds 15 to 20 kt, becoming S 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 5 to 8 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM. .MON...S winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 7 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM. .MON NIGHT...S winds 10 to 15 kt. Seas 4 to 6 ft. .TUE...S winds around 10 kt. Seas 3 to 5 ft. .TUE NIGHT...S winds 5 to 10 kt. Seas 2 to 4 ft. .WED...S winds 10 to 15 kt. Seas 2 to 4 ft. .WED NIGHT...S winds 10 to 15 kt. Seas 2 to 4 ft. A chance of showers. 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. $$ ANZ237-220230- Block Island Sound- 952 AM EDT Sat Jul 21 2018 ...GALE WATCH IN EFFECT FROM LATE TONIGHT THROUGH SUNDAY AFTERNOON... .THIS AFTERNOON...E winds 10 to 15 kt. Gusts up to 25 kt. Seas 2 to 4 ft. .TONIGHT...E winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 6 ft. Patchy fog. Showers likely with scattered tstms. Some tstms may produce gusty winds and heavy rainfall. Vsby 1 to 3 NM. .SUN...SE winds 15 to 20 kt with gusts up to 35 kt. Seas 5 to 8 ft. Patchy fog. Numerous showers and scattered tstms. Some tstms may produce gusty winds and heavy rainfall. Vsby 1 to 3 NM. .SUN NIGHT...S winds 10 to 15 kt with gusts up to 25 kt. Seas 4 to 7 ft. Patchy fog. Showers likely with a chance of tstms. Some tstms may produce heavy rainfall. Vsby 1 NM or less. .MON...S winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 7 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM. .MON NIGHT...S winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas 4 to 6 ft. .TUE...S winds 5 to 10 kt. Seas 3 to 5 ft. .TUE NIGHT...S winds 5 to 10 kt. Seas 2 to 4 ft. .WED...S winds 5 to 10 kt. Seas 2 to 4 ft. A chance of showers. .WED NIGHT...S winds around 10 kt. Seas 3 to 5 ft. A chance of showers. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-220230- Boston Harbor- 952 AM EDT Sat Jul 21 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH SUNDAY AFTERNOON... .THIS AFTERNOON...E winds 5 to 10 kt. Waves 1 foot or less. .TONIGHT...E winds 10 to 15 kt. Gusts up to 20 kt after midnight. Waves around 2 ft. Widespread showers. .SUN...SE winds 10 to 15 kt with gusts up to 25 kt. Waves 2 to 3 ft. Patchy fog. Widespread showers and numerous tstms. Some tstms may produce gusty winds and heavy rainfall. Vsby 1 NM or less. .SUN NIGHT...SE winds 10 to 15 kt with gusts up to 20 kt, becoming S 5 to 10 kt after midnight. Waves 2 to 4 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM. .MON...S winds 5 to 10 kt. Waves 2 to 3 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .MON NIGHT...S winds 5 to 10 kt. Waves 2 to 3 ft. .TUE...S winds 5 to 10 kt. Waves around 2 ft. .TUE NIGHT...S winds 5 to 10 kt. Waves around 2 ft. .WED...S winds 5 to 10 kt. Waves around 2 ft. A chance of showers. .WED NIGHT...S winds 5 to 10 kt. Waves 2 to 3 ft. A chance of showers. 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. $$ ANZ236-220230- Narragansett Bay- 952 AM EDT Sat Jul 21 2018 ...GALE WATCH IN EFFECT FROM LATE TONIGHT THROUGH SUNDAY AFTERNOON... .THIS AFTERNOON...E winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft. .TONIGHT...E winds 10 to 15 kt with gusts up to 25 kt. Waves 2 to 4 ft. Widespread showers and numerous tstms. Some tstms may produce gusty winds and heavy rainfall. .SUN...SE winds 15 to 20 kt with gusts up to 30 kt. Waves 3 to 5 ft. Patchy fog. Numerous showers and scattered tstms. Some tstms may produce gusty winds and heavy rainfall. Vsby 1 to 3 NM. .SUN NIGHT...S winds 10 to 15 kt. Gusts up to 25 kt in the evening. Waves 3 to 5 ft. Patchy fog. Showers likely with a chance of tstms. Some tstms may produce heavy rainfall. Vsby 1 to 3 NM. .MON...S winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Waves 3 to 5 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM. .MON NIGHT...S winds 5 to 10 kt. Waves 2 to 4 ft. .TUE...S winds 5 to 10 kt. Waves 2 to 4 ft. .TUE NIGHT...S winds 5 to 10 kt. Waves 2 to 3 ft. A chance of showers. .WED...S winds 5 to 10 kt. Waves 2 to 3 ft. A chance of showers. .WED NIGHT...S winds 5 to 10 kt. Waves 2 to 3 ft. A chance of showers. Winds and waves higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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

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