Coastal Waters Forecast
Issued by NWS Boston, MA

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FZUS51 KBOX 240502
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
101 AM EDT Sun Mar 24 2024

Coastal waters from the Merrimack River MA to Watch Hill RI out
to 25 NM

ANZ200-241800-
101 AM EDT Sun Mar 24 2024

.Synopsis for Massachusetts and Rhode Island coastal waters...
Low pressure move up across the waters to Nova Scotia tonight. Next
week, low pressure offshore may combine with strong high pressure
over Quebec, yielding onshore flow and rough seas for Monday into
early Tuesday with gale force gusts. A ridge of high pressure will
be centered over the waters for Wednesday. A cold front will cross
the waters on Thursday.

$$

ANZ250-241800-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
101 AM EDT Sun Mar 24 2024

...GALE WARNING IN EFFECT THROUGH THIS EVENING...

.REST OF TONIGHT...N winds 25 to 30 kt with gusts up to 35 kt.
Seas 7 to 10 ft. Areas of fog. A chance of rain.
.SUN...N winds 25 to 30 kt, diminishing to 20 to 25 kt in the
afternoon. Seas 7 to 10 ft.
.SUN NIGHT...NE winds 20 to 25 kt with gusts up to 30 kt. Seas
7 to 10 ft.
.MON...NE winds around 25 kt with gusts up to 35 kt. Seas 9 to
12 ft.
.MON NIGHT AND TUE...NE winds 25 to 30 kt with gusts up to 35 kt.
Seas 10 to 13 ft.
.TUE NIGHT...NE winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Gusts up to 30 kt. Seas 10 to 12 ft, subsiding to
8 to 11 ft after midnight. A chance of rain.
.WED...E winds 10 to 15 kt with gusts up to 20 kt. Seas 6 to
9 ft. A chance of rain.
.WED NIGHT...S winds 5 to 10 kt. Seas 5 to 7 ft. A chance of
rain.
.THU AND THU NIGHT...N winds 5 to 10 kt, increasing to 15 to
20 kt with gusts up to 30 kt. Seas 4 to 6 ft. Rain likely. Vsby
1 to 3 NM.

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.

$$

ANZ251-241800-
Massachusetts Bay and Ipswich Bay-
101 AM EDT Sun Mar 24 2024

...GALE WARNING IN EFFECT THROUGH THIS AFTERNOON...

.REST OF TONIGHT...NW winds 25 to 30 kt with gusts up to 35 kt.
Seas 5 to 6 ft. Areas of fog. A chance of rain.
.SUN...N winds 20 to 25 kt with gusts up to 35 kt. Seas 4 to
6 ft.
.SUN NIGHT...N winds 20 to 25 kt, becoming NE 25 to 30 kt after
midnight. Seas 4 to 6 ft, building to 5 to 8 ft after midnight.
.MON...NE winds 25 to 30 kt, diminishing to 20 to 25 kt in the
afternoon. Seas 8 to 10 ft.
.MON NIGHT AND TUE...NE winds 20 to 25 kt with gusts up to 30 kt.
Seas 8 to 11 ft.
.TUE NIGHT...NE winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Gusts up to 30 kt. Seas 8 to 11 ft, subsiding to
7 to 9 ft after midnight. A chance of rain.
.WED...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 5 to
8 ft. A chance of rain.
.WED NIGHT...SW winds 5 to 10 kt. Seas 4 to 6 ft. A chance of
rain.
.THU AND THU NIGHT...N winds 5 to 10 kt, increasing to 10 to
15 kt with gusts up to 25 kt. Seas 3 to 5 ft. Rain likely. Vsby
1 to 3 NM.

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.

$$

ANZ231-241800-
Cape Cod Bay-
101 AM EDT Sun Mar 24 2024

...GALE WARNING IN EFFECT THROUGH THIS AFTERNOON...

.REST OF TONIGHT...NW winds 25 to 30 kt. Seas 6 to 7 ft. Areas of
fog. A chance of rain.
.SUN...N winds 25 to 30 kt, diminishing to 20 to 25 kt in the
afternoon. Seas 6 to 7 ft.
.SUN NIGHT...N winds 20 to 25 kt, becoming NE 25 to 30 kt after
midnight. Seas 6 to 8 ft.
.MON...NE winds 25 to 30 kt with gusts up to 35 kt. Seas 7 to
9 ft.
.MON NIGHT AND TUE...NE winds 20 to 25 kt with gusts up to 35 kt.
Seas 6 to 9 ft.
.TUE NIGHT...NE winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Gusts up to 30 kt. Seas 5 to 8 ft. A chance of
rain.
.WED...E winds around 10 kt with gusts up to 20 kt. Seas 4 to
6 ft. A chance of rain.
.WED NIGHT...SW winds 5 to 10 kt. Seas 3 to 4 ft. A chance of
rain.
.THU AND THU NIGHT...N winds 5 to 10 kt, increasing to 15 to
20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Rain likely. Vsby
1 to 3 NM.

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.

$$

ANZ254-241800-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
101 AM EDT Sun Mar 24 2024

...GALE WARNING IN EFFECT THROUGH THIS EVENING...

.REST OF TONIGHT...NW winds 25 to 30 kt with gusts up to 35 kt.
Seas 9 to 13 ft. Areas of fog. A chance of rain. Vsby 1 to 3 NM.
.SUN...N winds 25 to 30 kt with gusts up to 35 kt. Seas 9 to
13 ft.
.SUN NIGHT...NE winds 25 to 30 kt with gusts up to 40 kt. Seas
9 to 12 ft.
.MON...NE winds 25 to 30 kt with gusts up to 40 kt. Seas 11 to
14 ft.
.MON NIGHT AND TUE...NE winds 25 to 30 kt with gusts up to 45 kt.
Seas 10 to 14 ft.
.TUE NIGHT...NE winds 15 to 20 kt with gusts up to 30 kt. Seas
9 to 12 ft. A chance of rain after midnight.
.WED...E winds 10 to 15 kt with gusts up to 20 kt. Seas 6 to
9 ft. A chance of rain.
.WED NIGHT...S winds around 10 kt. Seas 5 to 7 ft. A chance of
rain.
.THU AND THU NIGHT...N winds 5 to 10 kt with gusts up to 20 kt,
increasing to 15 to 20 kt with gusts up to 30 kt. Seas 5 to 6 ft.
Rain likely. Vsby 1 to 3 NM.

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.

$$

ANZ255-241800-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
101 AM EDT Sun Mar 24 2024

...GALE WARNING IN EFFECT THROUGH THIS EVENING...

.REST OF TONIGHT...N winds 25 to 30 kt with gusts up to 35 kt.
Seas 10 to 13 ft. Areas of fog. A chance of rain. Vsby 1 to 3 NM.
.SUN...N winds around 30 kt with gusts up to 40 kt. Seas 9 to
13 ft.
.SUN NIGHT...NE winds 30 to 40 kt with gusts up to 45 kt. Seas
8 to 11 ft.
.MON...NE winds 30 to 35 kt with gusts up to 45 kt. Seas 9 to
13 ft.
.MON NIGHT AND TUE...NE winds 25 to 35 kt with gusts up to 45 kt.
Seas 9 to 12 ft.
.TUE NIGHT...NE winds 15 to 20 kt with gusts up to 30 kt. Seas
7 to 10 ft.
.WED...E winds 10 to 15 kt with gusts up to 20 kt. Seas 5 to
7 ft.
.WED NIGHT...S winds around 10 kt. Seas 4 to 6 ft. A chance of
rain.
.THU AND THU NIGHT...N winds around 10 kt with gusts up to 20 kt,
increasing to 15 to 20 kt with gusts up to 30 kt. Seas 4 to 6 ft.
Rain likely. Vsby 1 to 3 NM.

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.

$$

ANZ256-241800-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
101 AM EDT Sun Mar 24 2024

...GALE WARNING IN EFFECT THROUGH THIS EVENING...

.REST OF TONIGHT...N winds 25 to 30 kt with gusts up to 40 kt.
Seas 11 to 13 ft. A slight chance of rain.
.SUN...N winds 25 to 30 kt with gusts up to 40 kt. Seas 9 to
13 ft, subsiding to 8 to 11 ft in the afternoon.
.SUN NIGHT...NE winds 25 to 35 kt with gusts up to 45 kt. Seas
7 to 10 ft.
.MON...NE winds 25 to 30 kt with gusts up to 45 kt. Seas 9 to
12 ft.
.MON NIGHT...NE winds 25 to 30 kt with gusts up to 45 kt. Seas
8 to 11 ft.
.TUE...NE winds 25 to 30 kt, diminishing to 20 to 25 kt in the
afternoon. Gusts up to 40 kt. Seas 7 to 10 ft.
.TUE NIGHT...NE winds around 20 kt, diminishing to around 15 kt
after midnight. Gusts up to 30 kt. Seas 6 to 9 ft.
.WED...E winds 10 to 15 kt with gusts up to 20 kt. Seas 5 to
7 ft. A chance of rain.
.WED NIGHT...SW winds 5 to 10 kt. Seas 4 to 5 ft. A chance of
rain.
.THU AND THU NIGHT...N winds 5 to 10 kt with gusts up to 20 kt,
increasing to 15 to 20 kt with gusts up to 30 kt. Seas 4 to 6 ft.
Rain likely. Vsby 1 to 3 NM.

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.

$$

ANZ232-241800-
Nantucket Sound-
101 AM EDT Sun Mar 24 2024

...GALE WARNING IN EFFECT THROUGH THIS AFTERNOON...

.REST OF TONIGHT...N winds 25 to 30 kt with gusts up to 35 kt.
Seas 5 to 7 ft. Areas of fog. A chance of rain.
.SUN...N winds 25 to 30 kt with gusts up to 40 kt. Seas 5 to
7 ft.
.SUN NIGHT...NE winds 25 to 30 kt with gusts up to 40 kt. Seas
5 to 7 ft.
.MON...NE winds 25 to 30 kt with gusts up to 40 kt. Seas 6 to
8 ft.
.MON NIGHT AND TUE...NE winds 25 to 30 kt with gusts up to 40 kt.
Seas 5 to 8 ft.
.TUE NIGHT...NE winds 15 to 20 kt with gusts up to 30 kt. Seas
4 to 6 ft.
.WED...E winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
5 ft. A chance of rain.
.WED NIGHT...SW winds 5 to 10 kt. Seas 2 to 4 ft. A chance of
rain.
.THU AND THU NIGHT...N winds 5 to 10 kt with gusts up to 20 kt,
increasing to 15 to 20 kt with gusts up to 30 kt. Seas 2 to 4 ft.
Rain likely. Vsby 1 to 3 NM.

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.

$$

ANZ233-241800-
Vineyard Sound-
101 AM EDT Sun Mar 24 2024

...GALE WARNING IN EFFECT THROUGH THIS AFTERNOON...

.REST OF TONIGHT...N winds 25 to 30 kt with gusts up to 35 kt.
Seas 6 to 8 ft. A chance of rain.
.SUN...N winds 25 to 30 kt with gusts up to 40 kt. Seas 5 to
8 ft, subsiding to 5 to 6 ft in the afternoon.
.SUN NIGHT...NE winds 25 to 30 kt with gusts up to 40 kt. Seas
5 to 6 ft.
.MON...NE winds 25 to 30 kt with gusts up to 40 kt. Seas 5 to
7 ft.
.MON NIGHT AND TUE...NE winds 25 to 30 kt with gusts up to 40 kt.
Seas 4 to 6 ft.
.TUE NIGHT...NE winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Gusts up to 30 kt. Seas 4 to 6 ft, subsiding to
2 to 4 ft after midnight.
.WED AND WED NIGHT...E winds around 10 kt with gusts up to 20 kt,
becoming SW. Seas 2 to 3 ft. A chance of rain.
.THU AND THU NIGHT...N winds 5 to 10 kt, increasing to 10 to
15 kt with gusts up to 25 kt. Seas 2 to 3 ft. Rain likely. Vsby
1 to 3 NM.

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.

$$

ANZ234-241800-
Buzzards Bay-
101 AM EDT Sun Mar 24 2024

...GALE WARNING IN EFFECT THROUGH THIS AFTERNOON...

.REST OF TONIGHT...N winds 20 to 25 kt with gusts up to 30 kt.
Seas 5 to 7 ft. A chance of rain.
.SUN...N winds 20 to 25 kt with gusts up to 35 kt. Seas 5 to
7 ft.
.SUN NIGHT...NE winds 20 to 25 kt, increasing to 25 to 30 kt
after midnight. Seas 4 to 6 ft.
.MON...NE winds 25 to 30 kt with gusts up to 40 kt. Seas 5 to
7 ft.
.MON NIGHT AND TUE...NE winds 25 to 30 kt with gusts up to 35 kt.
Seas 4 to 6 ft.
.TUE NIGHT...NE winds 10 to 15 kt with gusts up to 30 kt. Seas
3 to 5 ft. A chance of rain after midnight.
.WED AND WED NIGHT...E winds around 10 kt with gusts up to 20 kt,
becoming SW. Seas 2 to 3 ft. A chance of rain.
.THU AND THU NIGHT...N winds 5 to 10 kt, increasing to 10 to
15 kt with gusts up to 25 kt. Seas 2 to 3 ft. Rain likely.

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.

$$

ANZ235-241800-
Rhode Island Sound-
101 AM EDT Sun Mar 24 2024

...GALE WARNING IN EFFECT THROUGH THIS AFTERNOON...

.REST OF TONIGHT...N winds 25 to 30 kt with gusts up to 35 kt.
Seas 8 to 10 ft. A slight chance of rain.
.SUN...N winds 25 to 30 kt, diminishing to 20 to 25 kt in the
afternoon. Gusts up to 40 kt. Seas 7 to 10 ft, subsiding to 6 to
8 ft in the afternoon.
.SUN NIGHT...NE winds 25 to 30 kt with gusts up to 40 kt. Seas
6 to 7 ft.
.MON...NE winds 25 to 30 kt with gusts up to 40 kt. Seas 7 to
9 ft.
.MON NIGHT AND TUE...NE winds 25 to 30 kt with gusts up to 40 kt.
Seas 6 to 8 ft.
.TUE NIGHT...NE winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Gusts up to 30 kt. Seas 4 to 6 ft.
.WED AND WED NIGHT...E winds 10 to 15 kt with gusts up to 20 kt,
becoming SW 5 to 10 kt. Seas 3 to 5 ft. A chance of rain.
.THU AND THU NIGHT...N winds 5 to 10 kt, increasing to 10 to
15 kt with gusts up to 25 kt. Seas 3 to 4 ft. Rain likely. Vsby
1 to 3 NM.

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.

$$

ANZ237-241800-
Block Island Sound-
101 AM EDT Sun Mar 24 2024

...GALE WARNING IN EFFECT THROUGH THIS AFTERNOON...

.REST OF TONIGHT...N winds 20 to 25 kt with gusts up to 30 kt.
Seas 8 to 10 ft.
.SUN...N winds 20 to 25 kt, diminishing to 15 to 20 kt in the
afternoon. Gusts up to 30 kt. Seas 7 to 9 ft, subsiding to 5 to
8 ft in the afternoon.
.SUN NIGHT...NE winds 15 to 20 kt, increasing to 20 to 25 kt
after midnight. Gusts up to 35 kt. Seas 5 to 7 ft.
.MON...NE winds 20 to 25 kt with gusts up to 35 kt. Seas 6 to
8 ft.
.MON NIGHT AND TUE...NE winds 20 to 25 kt with gusts up to 35 kt.
Seas 5 to 8 ft.
.TUE NIGHT...NE winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Gusts up to 30 kt. Seas 4 to 6 ft.
.WED AND WED NIGHT...E winds 10 to 15 kt with gusts up to 20 kt,
becoming SW 5 to 10 kt. Seas 3 to 5 ft. A chance of rain.
.THU AND THU NIGHT...N winds 5 to 10 kt, increasing to 10 to
15 kt with gusts up to 25 kt. Seas 3 to 4 ft. Rain likely. Vsby
1 to 3 NM.

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.

$$

ANZ230-241800-
Boston Harbor-
101 AM EDT Sun Mar 24 2024

...GALE WARNING IN EFFECT THROUGH THIS AFTERNOON...

.REST OF TONIGHT...NW winds 20 to 25 kt with gusts up to 30 kt.
Waves around 2 ft, except 3 to 5 ft at the outer harbor entrance.
A slight chance of rain.
.SUN...N winds 20 to 25 kt, diminishing to 15 to 20 kt in the
afternoon. Gusts up to 30 kt. Waves around 2 ft, except 3 to 5 ft
at the outer harbor entrance.
.SUN NIGHT...N winds 20 to 25 kt, becoming NE 25 to 30 kt after
midnight. Waves 2 to 3 ft, except 4 to 6 ft at the outer harbor
entrance.
.MON...NE winds 20 to 25 kt with gusts up to 30 kt. Waves 2 to
3 ft, except 5 to 7 ft at the outer harbor entrance.
.MON NIGHT AND TUE...NE winds 20 to 25 kt with gusts up to 30 kt.
Waves 2 to 3 ft, except 5 to 8 ft at the outer harbor entrance.
.TUE NIGHT...NE winds 10 to 15 kt with gusts up to 25 kt. Waves
2 to 3 ft, except 5 to 8 ft at the outer harbor entrance. A
chance of rain.
.WED AND WED NIGHT...NE winds around 10 kt, becoming SW. Waves
2 to 3 ft, then 1 foot or less. At the outer harbor entrance,
waves 3 to 5 ft. A chance of rain.
.THU AND THU NIGHT...N winds 5 to 10 kt, increasing to 10 to
15 kt with gusts up to 20 kt. Waves 1 foot or less, then around
2 ft. At the outer harbor entrance, waves 2 to 4 ft. Rain likely.


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.

$$

ANZ236-241800-
Narragansett Bay-
101 AM EDT Sun Mar 24 2024

...GALE WARNING IN EFFECT UNTIL 2 AM EDT EARLY THIS MORNING...

.REST OF TONIGHT...N winds 20 to 25 kt with gusts up to 30 kt.
Waves around 3 ft, except 5 to 7 ft at the bay entrance.
.SUN...N winds 20 to 25 kt, diminishing to 15 to 20 kt in the
afternoon. Gusts up to 30 kt. Waves around 3 ft, except 5 to 7 ft
at the bay entrance.
.SUN NIGHT...N winds 15 to 20 kt with gusts up to 30 kt. Waves
around 3 ft, except 4 to 6 ft at the bay entrance.
.MON...NE winds 15 to 20 kt with gusts up to 30 kt. Waves around
3 ft, except 5 to 7 ft at the bay entrance.
.MON NIGHT AND TUE...NE winds 15 to 20 kt with gusts up to 35 kt.
Waves around 3 ft, except 4 to 6 ft at the bay entrance.
.TUE NIGHT...NE winds 10 to 15 kt with gusts up to 25 kt. Waves
2 to 3 ft, except 4 to 6 ft at the bay entrance. A chance of rain
after midnight.
.WED AND WED NIGHT...E winds around 10 kt, becoming SW. Waves
2 to 4 ft. A chance of rain.
.THU AND THU NIGHT...N winds 5 to 10 kt, increasing to 10 to
15 kt with gusts up to 25 kt. Waves 2 to 3 ft. Rain likely.

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.

$$

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