fzus51 kbox 310503
cwfbox
expires:202603311800;;571352

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
103 am edt tue mar 31 2026

coastal waters from the merrimack river ma to watch hill ri out
to 25 nm


anz231-311800-
cape cod bay-
103 am edt tue mar 31 2026

...small craft advisory in effect from 9 am edt this morning
through this evening...

.rest of tonight...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 e 1 foot
at 8 seconds. a chance of showers. 
.tue...sw winds 15 to 20 kt with gusts up to 25 kt. seas around
2 ft. wave detail: sw 2 ft at 3 seconds and e 1 foot at
9 seconds. patchy fog. showers, mainly in the morning. vsby 1 nm
or less, increasing to 1 to 3 nm in the afternoon. 
.tue night...sw winds 15 to 20 kt, increasing to 20 to 25 kt
after midnight. seas 2 to 3 ft. wave detail: sw 3 ft at
4 seconds. a chance of showers after midnight. 
.wed...sw winds 15 to 20 kt, becoming w 10 to 15 kt in the
afternoon. gusts up to 25 kt. seas 2 to 3 ft. wave detail: sw
3 ft at 4 seconds and ne 1 foot at 6 seconds. a chance of showers
in the morning, then showers likely in the afternoon. patchy fog
in the afternoon with vsby 1 to 3 nm. 
.wed night...ne winds 10 to 15 kt with gusts up to 20 kt. seas
around 2 ft. wave detail: n 2 ft at 4 seconds. showers. patchy
fog in the evening with vsby 1 nm or less. 
.thu and thu night...e winds 15 to 20 kt. seas 2 to 3 ft. wave
detail: ne 3 ft at 4 seconds and w 1 foot at 3 seconds. a chance
of showers. 
.fri through sat night...se winds 15 to 20 kt with gusts up to
25 kt. seas 2 to 3 ft.  

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.

$$

fzus51 kbox 310503
cwfbox
expires:202603311800;;571356

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
103 am edt tue mar 31 2026

coastal waters from the merrimack river ma to watch hill ri out
to 25 nm


anz232-311800-
nantucket sound-
103 am edt tue mar 31 2026

...small craft advisory in effect through wednesday evening...

.rest of tonight...sw winds 15 to 20 kt with gusts up to 25 kt.
seas 3 to 5 ft. wave detail: sw 4 ft at 5 seconds and e 1 foot at
8 seconds. a slight chance of showers. 
.tue...sw winds 20 to 25 kt with gusts up to 30 kt. seas 3 to
5 ft. wave detail: sw 4 ft at 5 seconds and se 1 foot at
8 seconds. showers likely, mainly in the morning. patchy fog in
the morning with vsby 1 to 3 nm. 
.tue night...sw winds 20 to 25 kt with gusts up to 30 kt. seas
4 to 6 ft. wave detail: s 5 ft at 6 seconds. 
.wed...sw winds 20 to 25 kt, diminishing to 15 to 20 kt in the
afternoon. gusts up to 30 kt. seas 4 to 6 ft. wave detail: sw
5 ft at 5 seconds. patchy fog. a chance of showers in the
afternoon. vsby 1 to 3 nm. 
.wed night...n winds 10 to 15 kt, becoming ne 15 to 20 kt after
midnight. seas 2 to 4 ft. wave detail: w 3 ft at 6 seconds and ne
2 ft at 3 seconds. showers. patchy fog in the evening with vsby
1 nm or less. 
.thu...ne winds 15 to 20 kt. seas 2 to 3 ft. wave detail: ne 3 ft
at 4 seconds and s 2 ft at 7 seconds. a chance of showers. 
.thu night...e winds 10 to 15 kt. gusts up to 20 kt in the
evening. seas 2 to 3 ft. 
.fri through sat night...se winds 15 to 20 kt with gusts up to
25 kt. seas 2 to 4 ft.  

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.

$$

fzus51 kbox 310503
cwfbox
expires:202603311800;;571357

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
103 am edt tue mar 31 2026

coastal waters from the merrimack river ma to watch hill ri out
to 25 nm


anz233-311800-
vineyard sound-
103 am edt tue mar 31 2026

...small craft advisory in effect through wednesday evening...

.rest of tonight...sw winds 15 to 20 kt with gusts up to 25 kt.
seas 4 to 6 ft. wave detail: sw 6 ft at 7 seconds and e 1 foot at
9 seconds. a slight chance of showers. 
.tue...sw winds 20 to 25 kt with gusts up to 30 kt. seas 4 to
6 ft. wave detail: sw 5 ft at 7 seconds and e 1 foot at
8 seconds. showers likely, mainly in the morning. patchy fog in
the morning with vsby 1 to 3 nm.
.tue night...sw winds 20 to 25 kt, increasing to 25 to 30 kt
after midnight. seas 5 to 8 ft. wave detail: sw 7 ft at
7 seconds. a chance of showers after midnight. 
.wed...sw winds 20 to 25 kt, diminishing to 15 to 20 kt in the
afternoon. gusts up to 30 kt. seas 5 to 8 ft. wave detail: sw
7 ft at 8 seconds. patchy fog. showers likely in the afternoon.
vsby 1 to 3 nm. 
.wed night...n winds 10 to 15 kt, becoming ne 15 to 20 kt after
midnight. seas 3 to 5 ft. wave detail: sw 5 ft at 7 seconds and
ne 2 ft at 3 seconds. showers. patchy fog in the evening with
vsby 1 nm or less. 
.thu...ne winds 15 to 20 kt with gusts up to 25 kt. seas 2 to
4 ft. wave detail: sw 3 ft at 7 seconds and ne 2 ft at 4 seconds.
a chance of showers.
.thu night...ne winds 15 to 20 kt, becoming e 10 to 15 kt after
midnight. seas 2 to 3 ft. 
.fri...s winds 15 to 20 kt with gusts up to 25 kt. seas 2 to
3 ft. 
.fri night...sw winds 20 to 25 kt. seas 3 to 5 ft.
.sat and sat night...sw winds 10 to 15 kt, becoming se 15 to
20 kt. seas 2 to 4 ft.  

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.

$$

fzus51 kbox 310503
cwfbox
expires:202603311800;;571358

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
103 am edt tue mar 31 2026

coastal waters from the merrimack river ma to watch hill ri out
to 25 nm


anz234-311800-
buzzards bay-
103 am edt tue mar 31 2026

...small craft advisory in effect through wednesday evening...

.rest of tonight...sw winds 15 to 20 kt with gusts up to 25 kt.
seas 3 to 5 ft. wave detail: sw 5 ft at 7 seconds and e 1 foot at
8 seconds. a chance of showers. 
.tue...sw winds 20 to 25 kt with gusts up to 30 kt. seas 3 to
5 ft. wave detail: sw 5 ft at 6 seconds and e 1 foot at
8 seconds. a chance of showers. patchy fog in the morning with
vsby 1 to 3 nm. 
.tue night...sw winds 20 to 25 kt, increasing to 25 to 30 kt
after midnight. seas 4 to 6 ft. wave detail: sw 6 ft at
7 seconds. a chance of showers after midnight. 
.wed...sw winds 20 to 25 kt, diminishing to 15 to 20 kt in the
afternoon. gusts up to 30 kt. seas 4 to 6 ft. wave detail: sw
6 ft at 8 seconds. a chance of showers in the morning, then
showers likely in the afternoon. patchy fog in the afternoon. 
.wed night...ne winds 10 to 15 kt, increasing to 15 to 20 kt
after midnight. seas 2 to 4 ft. wave detail: sw 4 ft at 7 seconds
and ne 2 ft at 3 seconds. showers. patchy fog in the evening with
vsby 1 nm or less. 
.thu...ne winds 15 to 20 kt with gusts up to 25 kt. seas 2 to
3 ft. wave detail: ne 2 ft at 3 seconds and sw 2 ft at 7 seconds.
a chance of showers.
.thu night...ne winds 15 to 20 kt, becoming e 5 to 10 kt after
midnight. seas 2 to 3 ft. 
.fri through sat night...se winds 20 to 25 kt. seas 2 to 4 ft.  

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.

$$

fzus51 kbox 310503
cwfbox
expires:202603311800;;571359

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
103 am edt tue mar 31 2026

coastal waters from the merrimack river ma to watch hill ri out
to 25 nm


anz235-311800-
rhode island sound-
103 am edt tue mar 31 2026

...small craft advisory in effect through wednesday evening...

.rest of tonight...sw winds around 20 kt with gusts up to 25 kt.
seas 5 to 7 ft. wave detail: sw 7 ft at 8 seconds and e 1 foot at
9 seconds. a chance of showers. 
.tue...sw winds 20 to 25 kt with gusts up to 30 kt. seas 5 to
7 ft. wave detail: s 7 ft at 8 seconds and e 1 foot at 8 seconds.
showers likely, mainly in the morning. patchy fog in the morning
with vsby 1 to 3 nm.
.tue night...sw winds 25 to 30 kt. seas 6 to 9 ft. wave detail:
sw 9 ft at 8 seconds. 
.wed...sw winds 20 to 25 kt, diminishing to 15 to 20 kt in the
afternoon. gusts up to 30 kt. seas 6 to 9 ft. wave detail: sw
9 ft at 8 seconds. patchy fog. showers likely in the afternoon.
vsby 1 to 3 nm, decreasing to 1 nm or less in the afternoon. 
.wed night...ne winds 10 to 15 kt, increasing to 15 to 20 kt
after midnight. seas 4 to 6 ft. wave detail: s 6 ft at 8 seconds
and ne 2 ft at 4 seconds. showers. patchy fog in the evening with
vsby 1 nm or less. 
.thu...ne winds 15 to 20 kt with gusts up to 25 kt. seas 3 to
5 ft. wave detail: s 5 ft at 7 seconds and ne 4 ft at 4 seconds.
a chance of showers.
.thu night...ne winds 15 to 20 kt, becoming e 10 to 15 kt after
midnight. seas 2 to 4 ft. 
.fri...s winds 15 to 20 kt with gusts up to 25 kt. seas 2 to
4 ft. 
.fri night through sat night...se winds 20 to 25 kt. seas 3 to
5 ft.  

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.

$$

fzus51 kbox 310503
cwfbox
expires:202603311800;;571362

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
103 am edt tue mar 31 2026

coastal waters from the merrimack river ma to watch hill ri out
to 25 nm


anz236-311800-
narragansett bay-
103 am edt tue mar 31 2026

...small craft advisory in effect from 8 am edt this morning
through wednesday afternoon...

.rest of tonight...sw winds 10 to 15 kt with gusts up to 20 kt.
waves 2 to 4 ft. a chance of showers. 
.tue...sw winds 15 to 20 kt with gusts up to 25 kt. waves 3 to
5 ft. showers likely, mainly in the morning. patchy fog in the
morning with vsby 1 to 3 nm. 
.tue night...sw winds 15 to 20 kt, increasing to 20 to 25 kt
after midnight. gusts up to 30 kt. waves 3 to 5 ft. a chance of
showers after midnight. 
.wed...sw winds 15 to 20 kt, diminishing to 10 to 15 kt in the
afternoon. gusts up to 25 kt. waves 3 to 5 ft. a chance of
showers in the morning, then showers likely in the afternoon.
patchy fog in the afternoon. 
.wed night...ne winds 10 to 15 kt. gusts up to 20 kt after
midnight. waves 2 to 4 ft. showers. patchy fog in the evening
with vsby 1 nm or less. 
.thu...ne winds 15 to 20 kt. waves 2 to 3 ft. a chance of showers
in the morning. 
.thu night...ne winds 10 to 15 kt with gusts up to 20 kt,
becoming e 5 to 10 kt after midnight. waves 2 to 3 ft. 
.fri through sat night...se winds 15 to 20 kt with gusts up to
25 kt. waves 2 to 3 ft.  

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.

$$

fzus51 kbox 310503
cwfbox
expires:202603311800;;571350

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
103 am edt tue mar 31 2026

coastal waters from the merrimack river ma to watch hill ri out
to 25 nm


anz250-311800-
coastal waters east of ipswich bay and the stellwagen bank
national marine sanctuary-
103 am edt tue mar 31 2026

...small craft advisory in effect from 9 am edt this morning
through this evening...

.rest of tonight...sw winds 10 to 15 kt with gusts up to 25 kt.
seas 2 to 4 ft. wave detail: sw 4 ft at 5 seconds and e 1 foot at
8 seconds. a chance of showers. 
.tue...sw winds 10 to 15 kt, becoming w in the afternoon. gusts
up to 25 kt. seas 2 to 3 ft. wave detail: sw 3 ft at 5 seconds
and e 1 foot at 8 seconds. patchy fog. showers in the morning. a
chance of showers in the afternoon. vsby 1 nm or less. 
.tue night...ne winds 10 to 15 kt, becoming sw 15 to 20 kt after
midnight. gusts up to 25 kt. seas 3 to 5 ft. wave detail: s 4 ft
at 6 seconds and ne 2 ft at 5 seconds. patchy fog. a chance of
showers. vsby 1 to 3 nm. 
.wed...sw winds 15 to 20 kt, becoming n in the afternoon. gusts
up to 25 kt. seas 3 to 5 ft. wave detail: sw 5 ft at 5 seconds
and ne 2 ft at 6 seconds. a chance of showers in the morning,
then showers likely in the afternoon. patchy fog in the
afternoon. 
.wed night...ne winds 15 to 20 kt. seas 2 to 4 ft. wave detail:
ne 4 ft at 6 seconds and s 3 ft at 6 seconds. showers likely.
patchy fog in the evening with vsby 1 nm or less. 
.thu and thu night...e winds 15 to 20 kt with gusts up to 25 kt.
seas 3 to 5 ft. wave detail: ne 5 ft at 6 seconds and s 2 ft at
7 seconds. a chance of showers. 
.fri...s winds 15 to 20 kt with gusts up to 25 kt. seas 3 to
4 ft. a chance of showers. 
.fri night and sat...sw winds 15 to 20 kt, becoming n. gusts up
to 25 kt. seas 2 to 4 ft. 
.sat night...se winds 15 to 20 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.

$$

fzus51 kbox 310503
cwfbox
expires:202603311800;;571353

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
103 am edt tue mar 31 2026

coastal waters from the merrimack river ma to watch hill ri out
to 25 nm


anz254-311800-
coastal waters from provincetown ma to chatham ma to nantucket ma
out 20 nm-
103 am edt tue mar 31 2026

...small craft advisory in effect through late wednesday night...

.rest of tonight...sw winds 15 to 20 kt with gusts up to 25 kt.
seas 5 to 7 ft. wave detail: sw 7 ft at 8 seconds and e 1 foot at
8 seconds. a slight chance of showers. 
.tue...sw winds 15 to 20 kt, increasing to 20 to 25 kt in the
afternoon. gusts up to 30 kt. seas 5 to 7 ft. wave detail: sw
6 ft at 8 seconds and e 1 foot at 8 seconds. patchy fog. showers
likely in the morning. a chance of showers in the afternoon. vsby
1 nm or less. 
.tue night...sw winds 20 to 25 kt with gusts up to 30 kt. seas
5 to 8 ft. wave detail: sw 8 ft at 8 seconds. patchy fog. vsby
1 to 3 nm, decreasing to 1 nm or less after midnight. 
.wed...sw winds 20 to 25 kt, diminishing to 15 to 20 kt in the
afternoon. gusts up to 30 kt. seas 6 to 9 ft, subsiding to 5 to
7 ft in the afternoon. wave detail: sw 8 ft at 8 seconds and ne
1 foot at 6 seconds, becoming sw 7 ft at 8 seconds and ne 1 foot
at 6 seconds. patchy fog. a chance of showers in the afternoon.
vsby 1 nm or less, increasing to 1 to 3 nm in the afternoon. 
.wed night...ne winds 10 to 15 kt with gusts up to 20 kt. seas
4 to 6 ft. wave detail: sw 6 ft at 8 seconds and ne 3 ft at
4 seconds. showers. patchy fog in the evening with vsby 1 nm or
less. 
.thu...ne winds 15 to 20 kt. seas 3 to 5 ft. wave detail: ne 4 ft
at 6 seconds and s 3 ft at 7 seconds. a chance of showers. 
.thu night...e winds 10 to 15 kt. gusts up to 20 kt in the
evening. seas 3 to 5 ft. 
.fri through sat night...se winds 20 to 25 kt. seas 3 to 5 ft.  

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.

$$

fzus51 kbox 310503
cwfbox
expires:202603311800;;571354

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
103 am edt tue mar 31 2026

coastal waters from the merrimack river ma to watch hill ri out
to 25 nm


anz255-311800-
coastal waters extending out to 25 nm south of marthas vineyard
and nantucket-
103 am edt tue mar 31 2026

...small craft advisory in effect through late wednesday night...

.rest of tonight...sw winds 20 to 25 kt with gusts up to 30 kt.
seas 6 to 9 ft. wave detail: sw 9 ft at 8 seconds and e 1 foot at
8 seconds. a slight chance of showers. 
.tue...sw winds 20 to 25 kt with gusts up to 30 kt. seas 6 to
9 ft. wave detail: sw 9 ft at 8 seconds and e 1 foot at
8 seconds. patchy fog in the morning. a chance of showers in the
morning with vsby 1 to 3 nm. 
.tue night...sw winds 25 to 30 kt with gusts up to 35 kt. seas
8 to 11 ft. wave detail: sw 11 ft at 8 seconds. patchy fog after
midnight with vsby 1 to 3 nm. 
.wed...sw winds 25 to 30 kt, diminishing to 20 to 25 kt in the
afternoon. seas 8 to 11 ft. wave detail: sw 11 ft at 8 seconds.
patchy fog. a chance of showers in the afternoon. vsby 1 nm or
less. 
.wed night...nw winds 15 to 20 kt, becoming ne after midnight.
seas 5 to 7 ft. wave detail: sw 7 ft at 8 seconds. showers
likely. patchy fog in the evening with vsby 1 nm or less. 
.thu...ne winds 15 to 20 kt with gusts up to 25 kt. seas 4 to
5 ft. wave detail: s 5 ft at 7 seconds and ne 4 ft at 5 seconds.
a chance of showers in the morning. 
.thu night...e winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. seas 3 to 5 ft. 
.fri...s winds 15 to 20 kt with gusts up to 25 kt. seas 3 to
5 ft. 
.fri night and sat...sw winds 20 to 25 kt with gusts up to 30 kt,
becoming w 15 to 20 kt. seas 4 to 6 ft. 
.sat night...se winds 15 to 20 kt. seas 3 to 5 ft.  

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.

$$