fzus51 kbox 181704
cwfbox
expires:202603190600;;907604

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
104 pm edt wed mar 18 2026

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


anz231-190600-
cape cod bay-
104 pm edt wed mar 18 2026

.this afternoon...ne winds 5 to 10 kt. seas 2 to 3 ft. wave
detail: nw 2 ft at 5 seconds and e 2 ft at 9 seconds. 
.tonight...se winds around 5 kt. seas 2 to 3 ft. wave detail: nw
2 ft at 5 seconds and e 2 ft at 8 seconds. 
.thu...se winds 5 to 10 kt. seas around 2 ft. wave detail: e 2 ft
at 7 seconds and n 1 foot at 4 seconds. 
.thu night...s winds 5 to 10 kt. seas around 2 ft. wave detail:
se 2 ft at 8 seconds and se 1 foot at 2 seconds. 
.fri...sw winds 5 to 10 kt. seas around 2 ft. wave detail: se
2 ft at 6 seconds and sw 1 foot at 2 seconds. 
.fri night...s winds 10 to 15 kt. gusts up to 20 kt after
midnight. seas around 2 ft. wave detail: e 2 ft at 9 seconds and
sw 1 foot at 2 seconds. a chance of rain after midnight. 
.sat...s winds 10 to 15 kt with gusts up to 20 kt. seas 2 to
3 ft. a chance of rain. 
.sat night...sw winds 10 to 15 kt with gusts up to 20 kt. seas
2 to 3 ft. 
.sun and sun night...sw winds 10 to 15 kt, becoming nw 15 to
20 kt. gusts up to 25 kt. seas 2 to 4 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.

$$

fzus51 kbox 181704
cwfbox
expires:202603190600;;907608

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
104 pm edt wed mar 18 2026

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


anz232-190600-
nantucket sound-
104 pm edt wed mar 18 2026

.this afternoon...e winds around 5 kt. seas 2 to 3 ft. wave
detail: se 2 ft at 10 seconds and w 1 foot at 4 seconds. 
.tonight...se winds around 5 kt. seas 2 to 3 ft. wave detail: se
2 ft at 10 seconds and nw 1 foot at 4 seconds. 
.thu...se winds 5 to 10 kt. seas around 2 ft. wave detail: se
2 ft at 9 seconds and w 1 foot at 3 seconds. 
.thu night...s winds around 5 kt. seas around 2 ft. wave detail:
se 1 foot at 2 seconds and se 1 foot at 9 seconds. 
.fri...sw winds 5 to 10 kt. seas around 2 ft. wave detail: sw
1 foot at 3 seconds and se 1 foot at 9 seconds. 
.fri night...s winds 10 to 15 kt. gusts up to 20 kt after
midnight. seas 2 to 3 ft. wave detail: sw 2 ft at 3 seconds and e
2 ft at 9 seconds. a chance of rain after midnight. 
.sat...s winds 15 to 20 kt. seas 2 to 4 ft. a chance of rain. 
.sat night and sun...sw winds 10 to 15 kt. gusts up to 20 kt.
seas 2 to 4 ft. 
.sun night...nw winds 15 to 20 kt. seas 2 to 4 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.

$$

fzus51 kbox 181704
cwfbox
expires:202603190600;;907609

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
104 pm edt wed mar 18 2026

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


anz233-190600-
vineyard sound-
104 pm edt wed mar 18 2026

.this afternoon...s winds 5 to 10 kt. seas 2 to 4 ft. wave
detail: s 3 ft at 10 seconds and w 1 foot at 5 seconds. 
.tonight...se winds around 5 kt. seas 2 to 3 ft. wave detail: s
3 ft at 9 seconds and sw 1 foot at 4 seconds. 
.thu...se winds 5 to 10 kt. seas 2 to 3 ft. wave detail: s 2 ft
at 9 seconds. 
.thu night...s winds 5 to 10 kt. seas around 2 ft. wave detail:
se 2 ft at 8 seconds and se 1 foot at 2 seconds. 
.fri...sw winds 5 to 10 kt. seas around 2 ft. wave detail: se
2 ft at 8 seconds and sw 1 foot at 3 seconds. 
.fri night...sw winds 10 to 15 kt, becoming s 15 to 20 kt after
midnight. seas 2 to 3 ft. wave detail: sw 2 ft at 4 seconds and
se 1 foot at 8 seconds. a chance of rain after midnight. 
.sat...s winds 15 to 20 kt. seas 2 to 4 ft. a chance of rain. 
.sat night and sun...sw winds 10 to 15 kt, increasing to 15 to
20 kt. seas 2 to 4 ft. 
.sun night...nw winds 15 to 20 kt. seas 2 to 4 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.

$$

fzus51 kbox 181704
cwfbox
expires:202603190600;;907610

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
104 pm edt wed mar 18 2026

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


anz234-190600-
buzzards bay-
104 pm edt wed mar 18 2026

.this afternoon...se winds 5 to 10 kt. seas 2 to 3 ft. wave
detail: s 2 ft at 10 seconds and w 1 foot at 5 seconds. 
.tonight...s winds 5 to 10 kt. seas around 2 ft. wave detail: s
2 ft at 9 seconds and s 1 foot at 4 seconds. 
.thu...se winds 5 to 10 kt. seas around 2 ft. wave detail: s 2 ft
at 9 seconds. 
.thu night...s winds 5 to 10 kt. seas around 2 ft. wave detail: s
2 ft at 8 seconds and se 1 foot at 2 seconds. 
.fri...sw winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. seas around 2 ft. wave detail: sw 1 foot at 2 seconds
and se 1 foot at 8 seconds. 
.fri night...sw winds 10 to 15 kt, becoming s 15 to 20 kt after
midnight. seas around 2 ft. wave detail: sw 2 ft at 3 seconds and
se 1 foot at 8 seconds. a chance of rain after midnight. 
.sat...sw winds 15 to 20 kt. seas 2 to 3 ft. a chance of rain. 
.sat night...sw winds 10 to 15 kt. seas 2 to 3 ft. 
.sun and sun night...sw winds 15 to 20 kt, becoming nw. 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.

$$

fzus51 kbox 181704
cwfbox
expires:202603190600;;907611

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
104 pm edt wed mar 18 2026

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


anz235-190600-
rhode island sound-
104 pm edt wed mar 18 2026

...small craft advisory in effect until 8 pm edt this evening...

.this afternoon...se winds 5 to 10 kt. seas 3 to 5 ft. wave
detail: s 5 ft at 10 seconds and w 1 foot at 5 seconds. 
.tonight...se winds 5 to 10 kt. seas 3 to 5 ft. wave detail: s
5 ft at 10 seconds. 
.thu...se winds 5 to 10 kt. seas 2 to 4 ft. wave detail: s 4 ft
at 9 seconds. 
.thu night...s winds 5 to 10 kt, becoming sw after midnight. seas
2 to 3 ft. wave detail: se 3 ft at 9 seconds. 
.fri...sw winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. seas 2 to 3 ft. wave detail: se 3 ft at 8 seconds and
sw 2 ft at 3 seconds. 
.fri night...s winds 10 to 15 kt. gusts up to 20 kt after
midnight. seas 2 to 3 ft. wave detail: s 3 ft at 4 seconds and se
3 ft at 9 seconds. rain likely after midnight. 
.sat...sw winds 15 to 20 kt. seas 3 to 5 ft. a chance of rain. 
.sat night and sun...sw winds 15 to 20 kt. seas 3 to 5 ft. 
.sun night...nw winds 15 to 20 kt. seas 3 to 4 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.

$$

fzus51 kbox 181704
cwfbox
expires:202603190600;;907614

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
104 pm edt wed mar 18 2026

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


anz236-190600-
narragansett bay-
104 pm edt wed mar 18 2026

.this afternoon...s winds 5 to 10 kt. waves 2 to 3 ft. 
.tonight...s winds 5 to 10 kt, becoming se after midnight. waves
2 to 3 ft. 
.thu...se winds around 5 kt, becoming s in the afternoon. waves
2 to 3 ft. 
.thu night...s winds 5 to 10 kt. waves around 2 ft.
.fri...sw winds 5 to 10 kt. waves around 2 ft. 
.fri night...s winds 10 to 15 kt. gusts up to 20 kt after
midnight. waves around 2 ft. a chance of rain in the evening,
then rain likely after midnight. 
.sat...sw winds 10 to 15 kt with gusts up to 20 kt. waves 2 to
3 ft. rain likely. 
.sat night...sw winds 10 to 15 kt. waves 2 to 3 ft. 
.sun and sun night...sw winds 10 to 15 kt, becoming nw. gusts up
to 20 kt. waves 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.

$$

fzus51 kbox 181704
cwfbox
expires:202603190600;;907602

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
104 pm edt wed mar 18 2026

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


anz250-190600-
coastal waters east of ipswich bay and the stellwagen bank
national marine sanctuary-
104 pm edt wed mar 18 2026

...small craft advisory in effect through thursday afternoon...

.this afternoon...ne winds 5 to 10 kt. seas 4 to 6 ft. wave
detail: se 5 ft at 10 seconds and nw 3 ft at 5 seconds. 
.tonight...s winds 5 to 10 kt. seas 3 to 5 ft. wave detail: se
5 ft at 10 seconds and nw 2 ft at 4 seconds. 
.thu...se winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. seas 3 to 4 ft. wave detail: se 4 ft at 10 seconds and
se 2 ft at 3 seconds.
.thu night...s winds 10 to 15 kt. seas 2 to 4 ft. wave detail: se
3 ft at 9 seconds and se 2 ft at 3 seconds. 
.fri...sw winds 5 to 10 kt. seas 2 to 4 ft. wave detail: se 3 ft
at 8 seconds and sw 2 ft at 3 seconds. 
.fri night...s winds 10 to 15 kt with gusts up to 20 kt. seas
3 to 5 ft. wave detail: e 4 ft at 9 seconds and sw 2 ft at
3 seconds. rain likely after midnight. 
.sat...s winds 15 to 20 kt with gusts up to 25 kt. seas 3 to
5 ft. a chance of rain. 
.sat night...sw winds 15 to 20 kt. seas 4 to 5 ft. 
.sun...sw winds 15 to 20 kt with gusts up to 25 kt. seas 3 to
5 ft. a chance of rain. 
.sun night...nw winds 20 to 25 kt. seas 4 to 6 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.

$$

fzus51 kbox 181704
cwfbox
expires:202603190600;;907605

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
104 pm edt wed mar 18 2026

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


anz254-190600-
coastal waters from provincetown ma to chatham ma to nantucket ma
out 20 nm-
104 pm edt wed mar 18 2026

...small craft advisory in effect through thursday afternoon...

.this afternoon...ne winds 5 to 10 kt. seas 5 to 7 ft. wave
detail: se 6 ft at 10 seconds and nw 3 ft at 6 seconds. 
.tonight...se winds around 5 kt. seas 4 to 6 ft. wave detail: se
5 ft at 10 seconds and nw 2 ft at 6 seconds. 
.thu...se winds around 5 kt. seas 3 to 5 ft. wave detail: se 5 ft
at 9 seconds and n 1 foot at 5 seconds. 
.thu night...s winds 5 to 10 kt. seas 2 to 4 ft. wave detail: se
4 ft at 9 seconds and n 1 foot at 3 seconds. 
.fri...sw winds 5 to 10 kt. seas 2 to 4 ft. wave detail: se 4 ft
at 9 seconds and sw 1 foot at 2 seconds. 
.fri night...s winds 10 to 15 kt. gusts up to 20 kt after
midnight. seas 3 to 4 ft. wave detail: e 4 ft at 9 seconds and sw
2 ft at 3 seconds. a chance of rain after midnight. 
.sat...s winds 15 to 20 kt. seas 3 to 5 ft. a chance of rain. 
.sat night...sw winds 10 to 15 kt with gusts up to 20 kt. seas
4 to 5 ft. 
.sun...sw winds 15 to 20 kt. seas 3 to 5 ft. a chance of rain. 
.sun night...nw winds 20 to 25 kt. seas 4 to 6 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.

$$

fzus51 kbox 181704
cwfbox
expires:202603190600;;907606

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
104 pm edt wed mar 18 2026

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


anz255-190600-
coastal waters extending out to 25 nm south of marthas vineyard
and nantucket-
104 pm edt wed mar 18 2026

...small craft advisory in effect through thursday afternoon...

.this afternoon...e winds 5 to 10 kt. seas 4 to 6 ft. wave
detail: s 6 ft at 10 seconds and w 2 ft at 6 seconds. 
.tonight...se winds around 5 kt. seas 3 to 5 ft. wave detail: s
5 ft at 10 seconds and w 1 foot at 6 seconds. 
.thu...se winds 5 to 10 kt. seas 3 to 4 ft. wave detail: se 4 ft
at 9 seconds. 
.thu night...s winds around 5 kt. seas 2 to 3 ft. wave detail: se
3 ft at 9 seconds. 
.fri...sw winds 5 to 10 kt. seas 2 to 3 ft. wave detail: se 3 ft
at 8 seconds and sw 1 foot at 2 seconds. 
.fri night...s winds 10 to 15 kt. gusts up to 20 kt after
midnight. seas 3 to 4 ft. wave detail: se 4 ft at 9 seconds and
sw 3 ft at 4 seconds. a chance of rain after midnight. 
.sat...s winds 15 to 20 kt with gusts up to 25 kt. seas 4 to
6 ft. a chance of rain. 
.sat night and sun...sw winds 15 to 20 kt. seas 4 to 6 ft. 
.sun night...nw winds 20 to 25 kt. seas 5 to 7 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.

$$