Coastal Waters Forecast
Issued by NWS Boston, MA

Current Version | Previous Version | Text Only | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
000 FZUS51 KBOX 182316 CWFBOX Coastal Waters Forecast National Weather Service Boston/Norton MA 716 PM EDT Sat Aug 18 2018 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-191200- 716 PM EDT Sat Aug 18 2018 .Synopsis for Massachusetts and Rhode Island coastal waters... A cold front will sweep across the waters tonight then become stalled across the southern waters through Mon, with weak waves of low pres moving along it. The waves of low pres will generate NE winds up to 25 kt at times especially across the southern waters. Meanwhile, high pres will build N of the waters through Tue. Low pres with its attendant fronts will approach from the west on Wed then head offshore Wed night. Dry high pres will build in from the W on Thu. 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. $$ ANZ250-191200- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 716 PM EDT Sat Aug 18 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM 4 AM EDT SUNDAY THROUGH SUNDAY EVENING... .TONIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Patchy fog this evening. A slight chance of showers with isolated tstms this evening with vsby 1 to 3 NM. .SUN...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 5 ft. .SUN NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. .MON...NE winds 10 to 15 kt. Gusts up to 20 kt in the morning. Seas 3 to 5 ft. .MON NIGHT...NE winds 5 to 10 kt. Seas 3 to 4 ft. .TUE...E winds 5 to 10 kt. Seas 3 to 4 ft. .TUE NIGHT...SE winds 5 to 10 kt. Seas 3 to 4 ft. A chance of showers. .WED...S winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Showers likely with a chance of tstms. .WED NIGHT...W winds 10 to 15 kt. Seas 3 to 5 ft. .THU...NW winds 5 to 10 kt. Seas 2 to 4 ft. .THU NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-191200- Massachusetts Bay and Ipswich Bay- 716 PM EDT Sat Aug 18 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY EVENING... .TONIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Patchy fog this evening. A slight chance of showers with isolated tstms this evening. .SUN...NE winds 15 to 20 kt. Seas 3 to 5 ft. .SUN NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 3 to 5 ft. .MON...NE winds 5 to 10 kt. Gusts up to 20 kt in the morning. Seas 2 to 4 ft. .MON NIGHT...NE winds 5 to 10 kt. Seas 2 to 4 ft. .TUE...E winds 5 to 10 kt. Seas 2 to 4 ft. .TUE NIGHT...SE winds 5 to 10 kt. Seas 2 to 4 ft. A chance of showers. .WED...S winds 5 to 10 kt. Seas 2 to 4 ft. Showers likely with a chance of tstms. .WED NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. .THU...NW winds 5 to 10 kt. Seas around 2 ft. .THU NIGHT...W winds around 5 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. $$ ANZ231-191200- Cape Cod Bay- 716 PM EDT Sat Aug 18 2018 .TONIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. A slight chance of tstms. A chance of showers this evening, then a slight chance of showers after midnight. Patchy fog this evening with vsby 1 to 3 NM. .SUN...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. A chance of showers. .SUN NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. .MON...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .MON NIGHT...NE winds 5 to 10 kt. Seas around 2 ft. .TUE...E winds 5 to 10 kt. Seas around 2 ft. .TUE NIGHT...SE winds 5 to 10 kt. Seas around 2 ft. A chance of showers. .WED...S winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Showers likely with a chance of tstms. .WED NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. .THU...NW winds 5 to 10 kt. Seas around 2 ft. .THU NIGHT...W winds around 5 kt. Seas 1 foot or less. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-191200- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 716 PM EDT Sat Aug 18 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM 4 AM EDT SUNDAY THROUGH LATE SUNDAY NIGHT... .TONIGHT...NW winds 10 to 15 kt, becoming NE after midnight. Gusts up to 20 kt. Seas 2 to 4 ft. Showers likely with a chance of tstms this evening, then a chance of showers with a slight chance of tstms after midnight. Patchy fog this evening. Vsby 1 NM or less. .SUN...NE winds around 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. A chance of showers. .SUN NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. A chance of showers. .MON...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 6 ft. .MON NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 4 to 6 ft. .TUE...E winds 5 to 10 kt. Seas 3 to 5 ft. .TUE NIGHT...SE winds 5 to 10 kt. Seas 3 to 4 ft. A chance of showers. .WED...S winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 6 ft. A chance of showers and tstms. .WED NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 6 ft. .THU...NW winds 5 to 10 kt. Seas 4 to 6 ft. .THU NIGHT...NW winds around 5 kt. Seas 2 to 4 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. $$ ANZ255-191200- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 716 PM EDT Sat Aug 18 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM SUNDAY MORNING THROUGH LATE SUNDAY NIGHT... .TONIGHT...W winds 5 to 10 kt, becoming NE 10 to 15 kt with gusts up to 20 kt after midnight. Seas 2 to 4 ft. Showers likely with a chance of tstms this evening, then a chance of showers with a slight chance of tstms after midnight. Patchy fog this evening. Vsby 1 NM or less, increasing to 1 to 3 NM after midnight. .SUN...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. A chance of showers. Vsby 1 to 3 NM. .SUN NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. A chance of showers. .MON...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 6 ft. A chance of showers. .MON NIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 3 to 5 ft. .TUE...NE winds 5 to 10 kt. Seas 3 to 5 ft. .TUE NIGHT...SE winds 5 to 10 kt. Seas 2 to 4 ft. A chance of showers and tstms. .WED...S winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 6 ft. Showers and tstms likely. .WED NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 5 to 7 ft. .THU...NW winds 5 to 10 kt. Seas 4 to 6 ft. .THU NIGHT...NW winds 5 to 10 kt. Seas 2 to 4 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-191200- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 716 PM EDT Sat Aug 18 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM 5 AM EDT SUNDAY THROUGH LATE SUNDAY NIGHT... .TONIGHT...W winds 5 to 10 kt, becoming NE 10 to 15 kt with gusts up to 25 kt after midnight. Seas 2 to 4 ft. Showers likely with a chance of tstms this evening, then a chance of showers with a slight chance of tstms after midnight. .SUN...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. A chance of showers. .SUN NIGHT...NE winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 4 to 6 ft. A chance of showers. .MON...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 6 ft. A chance of showers. .MON NIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 3 to 5 ft. .TUE...E winds around 10 kt. Seas 3 to 4 ft. .TUE NIGHT...SE winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 20 kt after midnight. Seas 3 to 4 ft. A chance of showers and tstms. .WED...S winds 15 to 20 kt. Seas 4 to 6 ft. A chance of showers and tstms. .WED NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 5 to 7 ft. .THU...NW winds 5 to 10 kt. Seas 4 to 6 ft. .THU NIGHT...NW winds 5 to 10 kt. Seas 3 to 4 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. $$ ANZ232-191200- Nantucket Sound- 716 PM EDT Sat Aug 18 2018 .TONIGHT...NW winds 5 to 10 kt, becoming NE 10 to 15 kt with gusts up to 20 kt after midnight. Seas 2 to 3 ft. Showers likely with a chance of tstms this evening, then a chance of showers with a slight chance of tstms after midnight. .SUN...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. .SUN NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. .MON...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. A chance of showers. .MON NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. .TUE...E winds 5 to 10 kt. Seas 2 to 3 ft. .TUE NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. .WED...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. A chance of showers and tstms. .WED NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. .THU...NW winds 5 to 10 kt. Seas 2 to 3 ft. .THU NIGHT...W winds around 5 kt. Seas around 2 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-191200- Vineyard Sound- 716 PM EDT Sat Aug 18 2018 ...SMALL CRAFT ADVISORY IN EFFECT SUNDAY AFTERNOON... .TONIGHT...NW winds 5 to 10 kt, becoming NE 10 to 15 kt with gusts up to 20 kt after midnight. Seas 2 to 3 ft. Showers likely with a chance of tstms this evening, then a chance of showers with a slight chance of tstms after midnight. .SUN...NE winds around 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. A chance of showers. .SUN NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. .MON...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. .MON NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. .TUE...E winds 5 to 10 kt. Seas around 2 ft. .TUE NIGHT...SE winds 5 to 10 kt. Seas around 2 ft. A chance of showers. .WED...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Showers and tstms likely. .WED NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. .THU...NW winds 5 to 10 kt. Seas 2 to 3 ft. .THU NIGHT...NW 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. $$ ANZ234-191200- Buzzards Bay- 716 PM EDT Sat Aug 18 2018 ...SMALL CRAFT ADVISORY IN EFFECT SUNDAY AFTERNOON... .TONIGHT...N winds 5 to 10 kt, becoming NE 10 to 15 kt with gusts up to 20 kt after midnight. Seas 2 to 3 ft. Showers likely with a chance of tstms this evening, then a chance of showers with a slight chance of tstms after midnight. .SUN...NE winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. A chance of showers. .SUN NIGHT...NE winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Gusts up to 20 kt. Seas around 2 ft. A chance of showers. .MON...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .MON NIGHT...NE winds 5 to 10 kt. Seas around 2 ft. .TUE...E winds 5 to 10 kt. Seas 1 foot or less. .TUE NIGHT...SE winds 5 to 10 kt. Seas around 2 ft. A chance of showers. .WED...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Showers and tstms likely. .WED NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. .THU...NW winds 5 to 10 kt. Seas 2 to 3 ft. .THU NIGHT...NW winds around 5 kt. Seas around 2 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-191200- Rhode Island Sound- 716 PM EDT Sat Aug 18 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM 5 AM EDT SUNDAY THROUGH SUNDAY EVENING... .TONIGHT...NW winds 5 to 10 kt, becoming NE 10 to 15 kt with gusts up to 25 kt after midnight. Seas 2 to 3 ft. Showers likely with a chance of tstms this evening, then a chance of showers with a slight chance of tstms after midnight. Vsby 1 to 3 NM this evening. .SUN...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. A chance of showers. .SUN NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. A chance of showers. .MON...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. .MON NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 3 to 5 ft. .TUE...E winds 5 to 10 kt. Seas 2 to 4 ft. .TUE NIGHT...SE winds 5 to 10 kt, becoming S 10 to 15 kt after midnight. Seas 2 to 3 ft. A chance of showers and tstms. .WED...S winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. A chance of showers and tstms. .WED NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. .THU...NW winds 5 to 10 kt. Seas 3 to 5 ft. .THU NIGHT...NW winds 5 to 10 kt. Seas 2 to 4 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. $$ ANZ237-191200- Block Island Sound- 716 PM EDT Sat Aug 18 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM 5 AM EDT SUNDAY THROUGH SUNDAY EVENING... .TONIGHT...NW winds 5 to 10 kt, becoming NE 10 to 15 kt with gusts up to 20 kt after midnight. Seas 2 to 3 ft. Showers likely with a chance of tstms this evening, then a chance of showers with a slight chance of tstms after midnight. .SUN...NE winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 ft. A chance of showers. .SUN NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. A chance of showers. .MON...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. .MON NIGHT...NE winds 5 to 10 kt. Seas 3 to 5 ft. .TUE...E winds 5 to 10 kt. Seas 2 to 4 ft. .TUE NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers and tstms. .WED...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. A chance of showers and tstms. .WED NIGHT...NW winds around 10 kt. Seas 3 to 5 ft. .THU...NW winds 5 to 10 kt. Seas 2 to 4 ft. .THU NIGHT...NW winds around 5 kt. Seas 2 to 4 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-191200- Boston Harbor- 716 PM EDT Sat Aug 18 2018 .TONIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft. A chance of showers with a slight chance of tstms this evening. .SUN...NE winds 15 to 20 kt. Waves 2 to 3 ft. .SUN NIGHT...NE winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Waves 2 to 3 ft. .MON...NE winds 5 to 10 kt. Waves 2 to 3 ft. .MON NIGHT...NE winds around 5 kt. Waves 1 foot or less. .TUE...E winds around 5 kt. Waves 1 foot or less. .TUE NIGHT...SE winds around 5 kt. Waves 1 foot or less. A chance of showers. .WED...S winds 5 to 10 kt. Waves around 2 ft. Showers and tstms likely. .WED NIGHT...W winds around 5 kt. Waves 1 foot or less. .THU...NW winds around 5 kt. Waves 1 foot or less. .THU NIGHT...NW winds around 5 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. $$ ANZ236-191200- Narragansett Bay- 716 PM EDT Sat Aug 18 2018 .TONIGHT...N winds 5 to 10 kt, becoming NE 10 to 15 kt with gusts up to 20 kt after midnight. Waves around 2 ft. A chance of showers with a slight chance of tstms. Patchy fog this evening with vsby 1 to 3 NM. .SUN...NE winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft. A chance of showers. .SUN NIGHT...NE winds 5 to 10 kt with gusts up to 20 kt. Waves around 2 ft. .MON...NE winds around 10 kt with gusts up to 20 kt. Waves 2 to 3 ft. .MON NIGHT...NE winds 5 to 10 kt. Waves 2 to 3 ft. .TUE...E winds 5 to 10 kt. Waves around 2 ft. .TUE NIGHT...SE winds 5 to 10 kt. Waves 2 to 3 ft. A chance of showers. .WED...S winds 5 to 10 kt with gusts up to 20 kt. Waves 2 to 3 ft. A chance of showers and tstms. .WED NIGHT...W winds 5 to 10 kt. Waves 2 to 3 ft. .THU...NW winds 5 to 10 kt. Waves 2 to 3 ft. .THU NIGHT...NW winds around 5 kt. Waves around 2 ft. Winds and waves higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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

USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.