fzus51 kbox 212003
cwfbox
expires:202609220900;;835031

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
403 pm edt mon sep 21 2026

coastal waters from the merrimack river ma to watch hill ri out
to 60 nm


anz231-220900-
cape cod bay-
403 pm edt mon sep 21 2026

...small craft advisory in effect until 5 pm edt this afternoon...

.tonight...ne winds 10 to 15 kt, increasing to 15 to 20 kt after
midnight. gusts up to 25 kt. seas 2 to 3 ft. wave detail: s 3 ft
at 16 seconds and n 2 ft at 5 seconds. 
.tue...ne winds 15 to 20 kt with gusts up to 25 kt. seas 3 to
4 ft. wave detail: n 3 ft at 4 seconds and se 1 foot at
17 seconds. 
.tue night...ne winds 15 to 20 kt with gusts up to 30 kt. seas
3 to 4 ft. wave detail: n 3 ft at 4 seconds and se 1 foot at
14 seconds. 
.wed...ne winds 20 to 25 kt with gusts up to 30 kt. seas 3 to
5 ft. wave detail: se 5 ft at 11 seconds and ne 4 ft at
4 seconds. 
.wed night...ne winds 20 to 25 kt with gusts up to 35 kt. seas
3 to 5 ft. wave detail: ne 5 ft at 5 seconds and e 5 ft at
10 seconds. 
.thu...ne winds 20 to 25 kt, increasing to 25 to 30 kt in the
afternoon. seas 4 to 6 ft. wave detail: e 6 ft at 10 seconds and
ne 5 ft at 4 seconds. 
.thu night...ne winds 25 to 30 kt with gusts up to 40 kt. seas
5 to 7 ft. a chance of showers. 
.fri...ne winds 30 to 40 kt with gusts up to 50 kt. seas 5 to
8 ft. showers likely. 
.fri night through sat night...ne winds 30 to 40 kt with gusts up
to 50 kt. seas 6 to 9 ft. showers 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.

$$

fzus51 kbox 212003
cwfbox
expires:202609220900;;835035

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
403 pm edt mon sep 21 2026

coastal waters from the merrimack river ma to watch hill ri out
to 60 nm


anz232-220900-
nantucket sound-
403 pm edt mon sep 21 2026

...small craft advisory in effect until 5 pm edt this afternoon...

.tonight...ne winds 15 to 20 kt. seas 2 to 3 ft. wave detail: ne
3 ft at 4 seconds and nw 1 foot at 5 seconds. 
.tue...ne winds around 20 kt with gusts up to 25 kt. seas 3 to
4 ft. wave detail: ne 4 ft at 4 seconds and se 1 foot at
17 seconds. 
.tue night...ne winds 20 to 25 kt with gusts up to 30 kt. seas
3 to 4 ft. wave detail: ne 4 ft at 5 seconds. 
.wed...ne winds 25 to 30 kt. seas 4 to 6 ft. wave detail: ne 6 ft
at 5 seconds and se 3 ft at 10 seconds. 
.wed night...ne winds 25 to 30 kt with gusts up to 35 kt. seas
4 to 6 ft. wave detail: ne 6 ft at 6 seconds and e 6 ft at
10 seconds. 
.thu...ne winds 25 to 30 kt with gusts up to 40 kt. seas 5 to
7 ft. wave detail: ne 6 ft at 5 seconds and e 6 ft at 10 seconds.
.thu night...ne winds 30 to 40 kt with gusts up to 45 kt. seas
5 to 8 ft. a chance of showers. 
.fri...ne winds 35 to 40 kt with gusts up to 50 kt. seas 5 to
7 ft. showers likely with a chance of tstms. 
.fri night...ne winds 35 to 45 kt with gusts up to 50 kt. seas
6 to 9 ft. showers likely with a chance of tstms. 
.sat...n winds 30 to 40 kt with gusts up to 50 kt. seas 6 to
9 ft. showers likely. 
.sat night...n winds 30 to 35 kt with gusts up to 45 kt. seas
5 to 7 ft. showers likely.  

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.

$$

fzus51 kbox 212003
cwfbox
expires:202609220900;;835036

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
403 pm edt mon sep 21 2026

coastal waters from the merrimack river ma to watch hill ri out
to 60 nm


anz233-220900-
vineyard sound-
403 pm edt mon sep 21 2026

...small craft advisory in effect until 5 pm edt this afternoon...

.tonight...ne winds 15 to 20 kt. seas 2 to 3 ft. wave detail: ne
2 ft at 4 seconds and nw 1 foot at 5 seconds. 
.tue...ne winds 15 to 20 kt with gusts up to 25 kt. seas 2 to
4 ft. wave detail: n 3 ft at 4 seconds and se 1 foot at
15 seconds. 
.tue night...ne winds 15 to 20 kt, increasing to 20 to 25 kt
after midnight. seas 3 to 4 ft. wave detail: ne 3 ft at 4 seconds
and se 1 foot at 9 seconds. 
.wed...ne winds 20 to 25 kt with gusts up to 30 kt. seas 3 to
5 ft. wave detail: ne 4 ft at 5 seconds and e 2 ft at 9 seconds. 
.wed night...ne winds 20 to 25 kt, increasing to 25 to 30 kt
after midnight. seas 3 to 5 ft. wave detail: ne 4 ft at 5 seconds
and se 3 ft at 11 seconds.
.thu...ne winds 25 to 30 kt with gusts up to 35 kt. seas 4 to
6 ft. wave detail: ne 4 ft at 5 seconds and se 3 ft at
13 seconds. 
.thu night...ne winds 25 to 30 kt, increasing to 30 to 35 kt
after midnight. seas 4 to 6 ft. a chance of showers. 
.fri and fri night...n winds 30 to 35 kt with gusts up to 50 kt.
seas 4 to 6 ft. showers likely. 
.sat...n winds 30 to 35 kt with gusts up to 45 kt. seas 5 to
7 ft. showers likely. 
.sat night...n winds 25 to 30 kt with gusts up to 40 kt. seas
4 to 6 ft. showers 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.

$$

fzus51 kbox 212003
cwfbox
expires:202609220900;;835037

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
403 pm edt mon sep 21 2026

coastal waters from the merrimack river ma to watch hill ri out
to 60 nm


anz234-220900-
buzzards bay-
403 pm edt mon sep 21 2026

...small craft advisory in effect until 5 pm edt this afternoon...

.tonight...ne winds 10 to 15 kt with gusts up to 20 kt. seas 2 to
3 ft. wave detail: ne 2 ft at 3 seconds and nw 2 ft at 6 seconds.
.tue...ne winds 15 to 20 kt with gusts up to 25 kt. seas 2 to
4 ft. wave detail: n 3 ft at 4 seconds and se 1 foot at
15 seconds. 
.tue night...ne winds 15 to 20 kt with gusts up to 25 kt. seas
2 to 4 ft. wave detail: n 3 ft at 4 seconds and se 1 foot at
7 seconds. 
.wed...ne winds 20 to 25 kt, increasing to 25 to 30 kt in the
afternoon. seas 3 to 5 ft. wave detail: n 4 ft at 5 seconds and
se 4 ft at 9 seconds. 
.wed night...ne winds 20 to 25 kt with gusts up to 30 kt. seas
3 to 5 ft. wave detail: n 4 ft at 5 seconds and se 2 ft at
12 seconds. 
.thu...ne winds 25 to 30 kt with gusts up to 40 kt. seas 4 to
6 ft. wave detail: e 5 ft at 14 seconds and ne 4 ft at 4 seconds.
.thu night...ne winds 25 to 35 kt with gusts up to 40 kt. seas
4 to 6 ft. a chance of showers. 
.fri through sat...n winds 30 to 40 kt with gusts up to 50 kt.
seas 4 to 6 ft. showers likely. 
.sat night...n winds 25 to 30 kt with gusts up to 40 kt. seas
4 to 6 ft. showers 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.

$$

fzus51 kbox 212003
cwfbox
expires:202609220900;;835038

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
403 pm edt mon sep 21 2026

coastal waters from the merrimack river ma to watch hill ri out
to 60 nm


anz235-220900-
rhode island sound-
403 pm edt mon sep 21 2026

...small craft advisory in effect until 5 pm edt this afternoon...
...gale watch in effect from tuesday afternoon through thursday
afternoon...

.tonight...ne winds 15 to 20 kt. seas 2 to 4 ft. wave detail: ne
4 ft at 5 seconds and w 1 foot at 5 seconds. 
.tue...ne winds 20 to 25 kt. seas 3 to 5 ft. wave detail: ne 5 ft
at 5 seconds and se 1 foot at 12 seconds. 
.tue night...ne winds 20 to 25 kt with gusts up to 30 kt. seas
3 to 5 ft. wave detail: e 5 ft at 7 seconds and n 2 ft at
4 seconds. 
.wed...ne winds 25 to 30 kt with gusts up to 35 kt. seas 5 to
7 ft. wave detail: ne 7 ft at 6 seconds and se 5 ft at 9 seconds.
.wed night and thu...ne winds 25 to 30 kt with gusts up to 40 kt.
seas 5 to 8 ft. wave detail: se 8 ft at 12 seconds and ne 7 ft at
7 seconds.
.thu night...ne winds 25 to 30 kt, increasing to 30 to 35 kt
after midnight. seas 5 to 8 ft. wave detail: ne 8 ft at 6 seconds
and se 7 ft at 13 seconds. a chance of showers. 
.fri through sat...n winds 25 to 35 kt with gusts up to 45 kt.
seas 6 to 9 ft. showers likely. 
.sat night...n winds 25 to 30 kt with gusts up to 40 kt. seas
5 to 7 ft. showers 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.

$$

fzus51 kbox 212003
cwfbox
expires:202609220900;;835041

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
403 pm edt mon sep 21 2026

coastal waters from the merrimack river ma to watch hill ri out
to 60 nm


anz236-220900-
narragansett bay-
403 pm edt mon sep 21 2026

.tonight...ne winds 10 to 15 kt with gusts up to 20 kt. waves
around 2 ft. 
.tue...ne winds 15 to 20 kt with gusts up to 25 kt. waves 2 to
3 ft. 
.tue night...ne winds 10 to 15 kt, increasing to 15 to 20 kt
after midnight. gusts up to 25 kt. waves 2 to 3 ft. 
.wed...ne winds 20 to 25 kt with gusts up to 30 kt. waves 2 to
3 ft. 
.wed night and thu...ne winds 20 to 25 kt with gusts up to 35 kt.
waves 2 to 3 ft, except 4 to 6 ft at the bay entrance. 
.thu night...ne winds 20 to 25 kt with gusts up to 35 kt. waves
around 3 ft, except 4 to 6 ft at the bay entrance. a chance of
showers after midnight. 
.fri and fri night...n winds 25 to 30 kt with gusts up to 45 kt.
waves around 3 ft, except 4 to 6 ft at the bay entrance. showers
likely. 
.sat...n winds 25 to 30 kt with gusts up to 45 kt. waves around
3 ft, except 4 to 6 ft at the bay entrance. showers likely. 
.sat night...n winds 20 to 25 kt with gusts up to 35 kt. waves
around 3 ft, except 4 to 6 ft at the bay entrance. showers
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.

$$

fzus51 kbox 212003
cwfbox
expires:202609220900;;835029

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
403 pm edt mon sep 21 2026

coastal waters from the merrimack river ma to watch hill ri out
to 60 nm


anz250-220900-
coastal waters east of ipswich bay and the stellwagen bank
national marine sanctuary-
403 pm edt mon sep 21 2026

.tonight...ne winds 5 to 10 kt, increasing to 15 to 20 kt with
gusts up to 25 kt after midnight. seas 2 to 4 ft. wave detail: ne
4 ft at 6 seconds and se 2 ft at 9 seconds. 
.tue...ne winds 15 to 20 kt with gusts up to 25 kt. seas 4 to
5 ft. wave detail: n 5 ft at 5 seconds and se 1 foot at
15 seconds. 
.tue night...ne winds 10 to 15 kt, increasing to 15 to 20 kt
after midnight. gusts up to 25 kt. seas 4 to 5 ft. wave detail: n
5 ft at 6 seconds and s 1 foot at 14 seconds. 
.wed...ne winds 15 to 20 kt with gusts up to 30 kt. seas 5 to
8 ft. wave detail: e 8 ft at 10 seconds and e 7 ft at 7 seconds. 
.wed night and thu...ne winds 20 to 25 kt with gusts up to 30 kt.
seas 6 to 9 ft. wave detail: e 9 ft at 10 seconds and ne 8 ft at
7 seconds. 
.thu night...ne winds 20 to 25 kt, increasing to 25 to 30 kt
after midnight. gusts up to 40 kt. seas 8 to 11 ft. wave detail:
e 11 ft at 12 seconds and n 9 ft at 6 seconds. a chance of
showers after midnight. 
.fri...ne winds 30 to 40 kt with gusts up to 50 kt. seas 10 to
14 ft. a chance of showers. 
.fri night and sat...ne winds 30 to 35 kt with gusts up to 50 kt.
seas 12 to 15 ft. showers likely. 
.sat night...ne winds 25 to 30 kt with gusts up to 45 kt. seas
9 to 13 ft. showers 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.

$$

fzus51 kbox 212003
cwfbox
expires:202609220900;;835032

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
403 pm edt mon sep 21 2026

coastal waters from the merrimack river ma to watch hill ri out
to 60 nm


anz254-220900-
coastal waters from provincetown ma to chatham ma to nantucket ma
out 20 nm-
403 pm edt mon sep 21 2026

...small craft advisory in effect until 3 am edt tuesday...

.tonight...ne winds 10 to 15 kt, increasing to 15 to 20 kt after
midnight. seas 3 to 5 ft. wave detail: ne 4 ft at 6 seconds and
nw 1 foot at 5 seconds. 
.tue...ne winds 15 to 20 kt with gusts up to 25 kt. seas 4 to
5 ft. wave detail: ne 5 ft at 6 seconds and se 1 foot at
15 seconds. 
.tue night...ne winds 15 to 20 kt, increasing to 20 to 25 kt
after midnight. gusts up to 30 kt. seas 5 to 7 ft. wave detail: e
7 ft at 7 seconds and n 1 foot at 4 seconds. 
.wed...ne winds 20 to 25 kt with gusts up to 30 kt. seas 6 to
9 ft. wave detail: e 9 ft at 9 seconds and n 1 foot at 4 seconds.
.wed night...ne winds 20 to 25 kt, increasing to 25 to 30 kt
after midnight. seas 7 to 10 ft. wave detail: e 10 ft at
10 seconds and n 1 foot at 4 seconds. 
.thu...ne winds 25 to 30 kt with gusts up to 35 kt. seas 8 to
11 ft. wave detail: e 11 ft at 11 seconds and n 6 ft at
5 seconds. 
.thu night...ne winds 25 to 35 kt with gusts up to 40 kt. seas
10 to 14 ft. a chance of showers. 
.fri through sat...ne winds 30 to 40 kt with gusts up to 50 kt.
seas 12 to 16 ft. showers likely. 
.sat night...ne winds 25 to 30 kt with gusts up to 45 kt. seas
9 to 13 ft. showers 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.

$$

fzus51 kbox 212003
cwfbox
expires:202609220900;;835033

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
403 pm edt mon sep 21 2026

coastal waters from the merrimack river ma to watch hill ri out
to 60 nm


anz255-220900-
coastal waters extending out to 25 nm south of marthas vineyard
and nantucket-
403 pm edt mon sep 21 2026

...small craft advisory in effect until 3 am edt tuesday...
...gale watch in effect from tuesday afternoon through thursday
afternoon...

.tonight...ne winds 15 to 20 kt with gusts up to 25 kt. seas 3 to
5 ft. wave detail: e 5 ft at 7 seconds and w 1 foot at 6 seconds.
.tue...ne winds 20 to 25 kt. seas 4 to 6 ft. wave detail: ne 6 ft
at 7 seconds and n 1 foot at 4 seconds. 
.tue night...ne winds 20 to 25 kt, increasing to 25 to 30 kt
after midnight. seas 5 to 7 ft. wave detail: ne 7 ft at 7 seconds
and n 2 ft at 4 seconds. 
.wed...ne winds 25 to 30 kt with gusts up to 35 kt. seas 6 to
9 ft. wave detail: e 8 ft at 7 seconds and e 7 ft at 9 seconds. 
.wed night...ne winds 25 to 30 kt with gusts up to 35 kt. seas
7 to 10 ft. wave detail: e 10 ft at 9 seconds and n 1 foot at
5 seconds. 
.thu...ne winds 30 to 35 kt with gusts up to 40 kt. seas 8 to
11 ft. wave detail: e 11 ft at 11 seconds and ne 8 ft at
7 seconds. 
.thu night...ne winds 35 to 40 kt with gusts up to 45 kt. seas
9 to 13 ft. a chance of showers. 
.fri...ne winds 35 to 40 kt with gusts up to 50 kt. seas 9 to
13 ft, except 12 to 17 ft s and e of nantucket. showers likely. 
.fri night...ne winds around 40 kt with gusts up to 50 kt. seas
10 to 14 ft, except 14 to 17 ft s and e of nantucket. showers
likely. 
.sat...n winds 30 to 40 kt with gusts up to 50 kt. seas 10 to
14 ft. showers likely. 
.sat night...n winds 25 to 35 kt with gusts up to 40 kt. seas
7 to 10 ft. showers 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.

$$