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National Weather Service Marine Forecast FZUS51 KBOX

FZUS51 KBOX 020304
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1004 PM EST Thu Jan 1 2026

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

ANZ200-021600
1004 PM EST Thu Jan 1 2026

Synopsis for Massachusetts and Rhode Island coastal waters

Gale Force NW wind gusts continue into tonight with areas of light to moderate freezing spray developing as well. High pres builds S of the waters Fri. Another cold front moves across the region Fri night, followed by high pres for Sat. Low pres will likely then track well SE of the 40N/70W benchmark on Sun, followed by another high pres for Mon. Low pressure may return Tuesday.

ANZ250-021600
Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary
1004 PM EST Thu Jan 1 2026

GALE WARNING IN EFFECT UNTIL 7 AM EST FRIDAY

FREEZING SPRAY ADVISORY IN EFFECT THROUGH FRIDAY AFTERNOON

OVERNIGHT
W winds 25 to 30 kt, diminishing to 20 to 25 kt. Seas 5 to 8 ft. Wave Detail: W 8 ft at 6 seconds and E 2 ft at 12 seconds. Light freezing spray.

FRI
W winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 7 ft, subsiding to 3 to 5 ft in the afternoon. Wave Detail: W 6 ft at 5 seconds and E 1 foot at 12 seconds, becoming W 4 ft at 5 seconds and E 1 foot at 12 seconds. Light freezing spray.

FRI NIGHT
W winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: W 5 ft at 5 seconds and E 1 foot at 11 seconds. Light freezing spray.

SAT
W winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: W 4 ft at 5 seconds and E 1 foot at 11 seconds. Light freezing spray in the morning.

SAT NIGHT
W winds 10 to 15 kt with gusts up to 20 kt, becoming NW 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave Detail: W 3 ft at 4 seconds and E 1 foot at 11 seconds.

SUN
NW 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 2 ft at 3 seconds and E 1 foot at 10 seconds. A chance of snow in the morning.

SUN NIGHT
NW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. A chance of light freezing spray.

MON
NW winds 15 to 20 kt. Seas 2 to 4 ft.

MON NIGHT
SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of snow.

TUE
SW winds 5 to 10 kt. Seas around 2 ft. A chance of rain and snow.

TUE NIGHT
S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of rain.

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.

ANZ251-021600
Massachusetts Bay and Ipswich Bay
1004 PM EST Thu Jan 1 2026

GALE WARNING IN EFFECT UNTIL 1 AM EST FRIDAY

FREEZING SPRAY ADVISORY IN EFFECT THROUGH FRIDAY AFTERNOON

OVERNIGHT
W winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to 5 ft. Wave Detail: W 5 ft at 5 seconds and E 1 foot at 13 seconds. Light freezing spray.

FRI
W winds 15 to 20 kt. Seas 2 to 4 ft. Wave Detail: W 3 ft at 4 seconds and E 1 foot at 12 seconds. Light freezing spray in the morning.

FRI NIGHT
W winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: W 3 ft at 4 seconds and E 1 foot at 11 seconds. Light freezing spray.

SAT
W winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: W 3 ft at 4 seconds and E 1 foot at 11 seconds. Light freezing spray in the morning.

SAT NIGHT THROUGH SUN NIGHT
NW winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail: NW 3 ft at 4 seconds and E 1 foot at 11 seconds.

MON
NW winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail: NW 3 ft at 4 seconds and NE 2 ft at 7 seconds.

MON NIGHT
SW winds 5 to 10 kt. Seas around 2 ft. A chance of snow.

TUE
SW winds 5 to 10 kt. Seas around 2 ft. A chance of snow.

TUE NIGHT
S winds 5 to 10 kt. Seas around 2 ft. A chance of rain.

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.

ANZ231-021600
Cape Cod Bay
1004 PM EST Thu Jan 1 2026

GALE WARNING IN EFFECT UNTIL 1 AM EST FRIDAY

OVERNIGHT
W winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to 5 ft. Wave Detail: NW 5 ft at 5 seconds and E 1 foot at 13 seconds. Light freezing spray.

FRI
W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: W 3 ft at 5 seconds and NE 1 foot at 11 seconds.

FRI NIGHT
W winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: W 3 ft at 4 seconds and E 1 foot at 11 seconds. Light freezing spray after midnight.

SAT
W winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: W 3 ft at 4 seconds and E 1 foot at 11 seconds.

SAT NIGHT THROUGH SUN NIGHT
NW winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail: NW 3 ft at 4 seconds and E 1 foot at 11 seconds.

MON
NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: N 3 ft at 6 seconds.

MON NIGHT
SW winds around 5 kt. Seas around 2 ft. A chance of snow.

TUE
SW winds 5 to 10 kt. Seas around 2 ft. A chance of rain and snow.

TUE NIGHT
S winds 5 to 10 kt. Seas around 2 ft. A chance of rain.

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.

ANZ254-021600
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm
1004 PM EST Thu Jan 1 2026

GALE WARNING IN EFFECT UNTIL 7 AM EST FRIDAY

OVERNIGHT
W winds 25 to 30 kt. Seas 6 to 9 ft. Wave Detail: NW 8 ft at 6 seconds and E 2 ft at 12 seconds. Light freezing spray.

FRI
W winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 7 ft. Wave Detail: W 6 ft at 7 seconds and E 2 ft at 12 seconds. Light freezing spray in the morning.

FRI NIGHT
W winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: W 5 ft at 5 seconds and E 1 foot at 11 seconds. Light freezing spray after midnight.

SAT
W winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: W 4 ft at 5 seconds and E 1 foot at 11 seconds.

SAT NIGHT
NW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: W 3 ft at 6 seconds and E 1 foot at 11 seconds.

SUN
NW winds 5 to 10 kt, increasing to 15 to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: NW 3 ft at 4 seconds and E 1 foot at 9 seconds. A chance of snow.

SUN NIGHT
NW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. A chance of light freezing spray after midnight.

MON
NW winds 15 to 20 kt. Seas 3 to 4 ft.

MON NIGHT
SW winds 5 to 10 kt. Seas 2 to 4 ft. A chance of rain.

TUE
SW winds 5 to 10 kt. Seas 2 to 3 ft.

TUE NIGHT
S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of rain.

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.

ANZ255-021600
Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket
1004 PM EST Thu Jan 1 2026

GALE WARNING IN EFFECT UNTIL 7 AM EST FRIDAY

OVERNIGHT
W winds 25 to 30 kt with gusts up to 35 kt. Seas 8 to 10 ft, subsiding to 6 to 9 ft. Wave Detail: W 10 ft at 8 seconds and E 2 ft at 13 seconds, becoming W 9 ft at 8 seconds and E 2 ft at 13 seconds. Light freezing spray. A slight chance of snow.

FRI
W winds 15 to 20 kt. Seas 5 to 7 ft. Wave Detail: W 6 ft at 7 seconds and E 2 ft at 12 seconds. Light freezing spray in the morning. A chance of snow in the morning.

FRI NIGHT
NW winds around 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. Wave Detail: W 5 ft at 7 seconds and E 1 foot at 12 seconds.

SAT
W winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Seas 3 to 5 ft. Wave Detail: W 5 ft at 6 seconds and E 1 foot at 11 seconds.

SAT NIGHT AND SUN
NW winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail: W 3 ft at 6 seconds and E 1 foot at 11 seconds.

SUN NIGHT
NW winds 15 to 20 kt, increasing to 20 to 25 kt after midnight. Seas 3 to 5 ft. Wave Detail: NW 5 ft at 5 seconds and E 1 foot at 11 seconds. A chance of light freezing spray after midnight.

MON
NW winds 15 to 20 kt. Seas 2 to 4 ft. A chance of light freezing spray.

MON NIGHT AND TUE
SW winds 5 to 10 kt. Seas 2 to 3 ft.

TUE NIGHT
S winds 10 to 15 kt. Seas 2 to 3 ft. A chance of rain.

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.

ANZ256-021600
Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island
1004 PM EST Thu Jan 1 2026

GALE WARNING IN EFFECT UNTIL 1 AM EST FRIDAY

OVERNIGHT
W winds 25 to 30 kt, diminishing to 20 to 25 kt. Seas 6 to 9 ft, subsiding to 5 to 7 ft. Wave Detail: NW 8 ft at 7 seconds and E 1 foot at 13 seconds, becoming W 7 ft at 7 seconds and E 1 foot at 13 seconds. Light freezing spray. A slight chance of snow.

FRI
W winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. Wave Detail: W 5 ft at 7 seconds and E 1 foot at 13 seconds.

FRI NIGHT
W winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. Wave Detail: W 5 ft at 6 seconds and E 1 foot at 12 seconds.

SAT
W winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Seas 3 to 5 ft. Wave Detail: NW 4 ft at 5 seconds and E 1 foot at 11 seconds.

SAT NIGHT AND SUN
NW winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail: NW 3 ft at 6 seconds and E 1 foot at 11 seconds.

SUN NIGHT
NW winds 15 to 20 kt, increasing to 20 to 25 kt after midnight. Seas 2 to 4 ft. Wave Detail: NW 4 ft at 4 seconds and E 1 foot at 10 seconds. A chance of light freezing spray after midnight.

MON THROUGH TUE
SW winds 15 to 20 kt. Seas 2 to 4 ft.

TUE NIGHT
S winds 10 to 15 kt. Seas 2 to 3 ft. A chance of rain.

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.

ANZ232-021600
Nantucket Sound
1004 PM EST Thu Jan 1 2026

GALE WARNING IN EFFECT UNTIL 1 AM EST FRIDAY

FREEZING SPRAY ADVISORY IN EFFECT THROUGH FRIDAY AFTERNOON

OVERNIGHT
W winds 25 to 30 kt, diminishing to 20 to 25 kt. Seas 4 to 6 ft. Wave Detail: W 5 ft at 5 seconds and E 1 foot at 13 seconds. Light freezing spray. A slight chance of snow.

FRI
W winds around 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: W 3 ft at 5 seconds and E 1 foot at 12 seconds.

FRI NIGHT
W winds 15 to 20 kt. Seas 2 to 4 ft. Wave Detail: W 3 ft at 4 seconds and E 1 foot at 12 seconds. Light freezing spray after midnight.

SAT
W winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: W 3 ft at 4 seconds and E 1 foot at 11 seconds.

SAT NIGHT THROUGH SUN NIGHT
NW winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail: NW 3 ft at 4 seconds and E 1 foot at 11 seconds.

MON
NW winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 4 seconds and E 1 foot at 9 seconds.

MON NIGHT
SW winds 5 to 10 kt. Seas around 2 ft. A chance of rain.

TUE
S winds 5 to 10 kt. Seas around 2 ft.

TUE NIGHT
S winds 5 to 10 kt. Seas around 2 ft. A chance of rain.

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.

ANZ233-021600
Vineyard Sound
1004 PM EST Thu Jan 1 2026

GALE WARNING IN EFFECT UNTIL 1 AM EST FRIDAY

FREEZING SPRAY ADVISORY IN EFFECT THROUGH FRIDAY AFTERNOON

OVERNIGHT
W winds 25 to 30 kt, diminishing to 20 to 25 kt. Seas 4 to 6 ft. Wave Detail: W 5 ft at 7 seconds and E 1 foot at 14 seconds. Light freezing spray. A slight chance of snow.

FRI
W winds 15 to 20 kt. Seas 3 to 4 ft. Wave Detail: W 3 ft at 6 seconds and E 1 foot at 13 seconds.

FRI NIGHT
W winds 15 to 20 kt. Seas 2 to 4 ft. Wave Detail: W 3 ft at 6 seconds and E 1 foot at 12 seconds. Light freezing spray after midnight.

SAT
W winds 10 to 15 kt. Gusts up to 20 kt in the morning. Seas 2 to 3 ft. Wave Detail: W 3 ft at 5 seconds and E 1 foot at 11 seconds.

SAT NIGHT THROUGH SUN NIGHT
NW winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft at 5 seconds and E 1 foot at 11 seconds.

MON
NW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: NW 2 ft at 4 seconds and S 1 foot at 9 seconds.

MON NIGHT
SW winds 5 to 10 kt. Seas around 2 ft. A chance of rain.

TUE
SW winds 5 to 10 kt. Seas around 2 ft.

TUE NIGHT
S winds 5 to 10 kt. Seas around 2 ft. A chance of rain.

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.

ANZ234-021600
Buzzards Bay
1004 PM EST Thu Jan 1 2026

GALE WARNING IN EFFECT UNTIL 1 AM EST FRIDAY

FREEZING SPRAY ADVISORY IN EFFECT THROUGH FRIDAY AFTERNOON

OVERNIGHT
W winds 20 to 25 kt with gusts up to 30 kt. Seas 2 to 4 ft. Wave Detail: W 4 ft at 6 seconds and E 1 foot at 13 seconds. Light freezing spray.

FRI
W winds around 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 6 seconds and E 1 foot at 13 seconds.

FRI NIGHT
W winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail: W 3 ft at 6 seconds and E 1 foot at 12 seconds.

SAT
W winds 10 to 15 kt. Gusts up to 20 kt in the morning. Seas around 2 ft. Wave Detail: W 2 ft at 5 seconds and E 1 foot at 11 seconds.

SAT NIGHT THROUGH SUN NIGHT
NW winds 15 to 20 kt. Seas around 2 ft. Wave Detail: W 2 ft at 5 seconds and E 1 foot at 11 seconds.

MON
NW winds 10 to 15 kt. Seas around 2 ft. Wave Detail: NW 2 ft at 3 seconds and SE 1 foot at 9 seconds.

MON NIGHT
SW winds around 5 kt. Seas 1 foot or less. A chance of snow.

TUE
SW winds 5 to 10 kt. Seas 1 foot or less.

TUE NIGHT
S winds 5 to 10 kt. Seas 1 foot or less. A chance of rain.

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.

ANZ235-021600
Rhode Island Sound
1004 PM EST Thu Jan 1 2026

GALE WARNING IN EFFECT UNTIL 1 AM EST FRIDAY

OVERNIGHT
W winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to 6 ft. Wave Detail: W 6 ft at 6 seconds and E 1 foot at 14 seconds. Light freezing spray. A slight chance of snow.

FRI
W winds 15 to 20 kt. Seas 3 to 4 ft. Wave Detail: W 4 ft at 7 seconds and E 1 foot at 13 seconds.

FRI NIGHT
W winds 15 to 20 kt. Seas 2 to 4 ft. Wave Detail: W 4 ft at 7 seconds and E 1 foot at 12 seconds. Light freezing spray after midnight.

SAT
W winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: W 3 ft at 5 seconds and E 1 foot at 11 seconds.

SAT NIGHT THROUGH SUN NIGHT
NW winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail: NW 3 ft at 4 seconds and E 1 foot at 11 seconds.

MON
NW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: NW 2 ft at 4 seconds and S 2 ft at 9 seconds.

MON NIGHT
SW winds 5 to 10 kt. Seas around 2 ft. A chance of rain.

TUE
SW winds 5 to 10 kt. Seas around 2 ft.

TUE NIGHT
S winds 10 to 15 kt. Seas around 2 ft. A chance of rain.

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.

ANZ237-021600
Block Island Sound
1004 PM EST Thu Jan 1 2026

GALE WARNING IN EFFECT UNTIL 1 AM EST FRIDAY

OVERNIGHT
W winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: W 4 ft at 6 seconds and SE 1 foot at 14 seconds. Light freezing spray. A slight chance of snow.

FRI
W winds around 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: W 3 ft at 5 seconds and E 1 foot at 13 seconds.

FRI NIGHT
W winds around 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: W 3 ft at 5 seconds and E 1 foot at 12 seconds.

SAT
W winds 10 to 15 kt. Gusts up to 20 kt in the morning. Seas 2 to 3 ft. Wave Detail: W 2 ft at 5 seconds and E 1 foot at 12 seconds.

SAT NIGHT THROUGH SUN NIGHT
NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft at 6 seconds and SE 1 foot at 11 seconds.

MON THROUGH TUE
SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: NW 2 ft at 3 seconds and S 1 foot at 10 seconds.

TUE NIGHT
S winds 5 to 10 kt. Seas around 2 ft. A chance of rain.

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.

ANZ230-021600
Boston Harbor
1004 PM EST Thu Jan 1 2026

SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 AM EST FRIDAY

OVERNIGHT
W winds 20 to 25 kt, diminishing to 15 to 20 kt. Waves around 2 ft.

FRI
W winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft.

FRI NIGHT
W winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Waves around 2 ft.

SAT
W winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft.

SAT NIGHT THROUGH SUN NIGHT
NW winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft.

MON
NW winds 10 to 15 kt. Waves around 2 ft.

MON NIGHT
SW winds around 5 kt. Waves 1 foot or less. A chance of snow.

TUE
SW winds around 5 kt. Waves 1 foot or less. A chance of snow.

TUE NIGHT
S winds 5 to 10 kt. Waves 1 foot or less. A chance of rain.

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.

ANZ236-021600
Narragansett Bay
1004 PM EST Thu Jan 1 2026

SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 AM EST FRIDAY

OVERNIGHT
W winds 15 to 20 kt, diminishing to 10 to 15 kt. Gusts up to 25 kt. Waves 2 to 3 ft. Light freezing spray.

FRI
W winds 10 to 15 kt. Waves around 2 ft.

FRI NIGHT
W winds 10 to 15 kt. Waves around 2 ft.

SAT
W winds 5 to 10 kt. Waves around 2 ft.

SAT NIGHT THROUGH SUN NIGHT
NW winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft.

MON
NW winds 5 to 10 kt. Waves around 2 ft.

MON NIGHT
SW winds around 5 kt. Waves 1 foot or less. A chance of snow.

TUE
SW winds 5 to 10 kt. Waves 1 foot or less.

TUE NIGHT
S winds 5 to 10 kt. Waves around 2 ft. A chance of rain.

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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