fzus51 kbox 171504
cwfbox
expires:202512180400;;742099

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
1004 am est wed dec 17 2025

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


anz231-180400-
cape cod bay-
1004 am est wed dec 17 2025

...gale warning in effect until 7 pm est this evening...

.this afternoon...sw winds 20 to 25 kt with gusts up to 35 kt.
seas 3 to 4 ft. wave detail: sw 3 ft at 4 seconds and se 1 foot
at 10 seconds. 
.tonight...w winds 15 to 20 kt, becoming nw 10 to 15 kt after
midnight. gusts up to 30 kt. seas 2 to 4 ft. wave detail: w 3 ft
at 4 seconds and se 1 foot at 10 seconds. 
.thu...s winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. seas around 2 ft. wave detail: s
2 ft at 3 seconds and se 1 foot at 10 seconds. 
.thu night...s winds 15 to 20 kt, increasing to 20 to 25 kt after
midnight. gusts up to 30 kt. seas 2 to 3 ft. wave detail: s 3 ft
at 4 seconds and se 1 foot at 7 seconds. rain likely after
midnight. 
.fri...s winds 25 to 30 kt with gusts up to 50 kt. seas 3 to
4 ft, building to 4 to 6 ft in the afternoon. wave detail: s 4 ft
at 5 seconds and se 4 ft at 13 seconds, becoming se 6 ft at
9 seconds and s 5 ft at 5 seconds. rain. vsby 1 to 3 nm. 
.fri night...w winds 25 to 30 kt with gusts up to 35 kt. seas
3 to 5 ft. wave detail: w 5 ft at 5 seconds and s 4 ft at
9 seconds. 
.sat through sun night...w winds 20 to 25 kt with gusts up to
30 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 171504
cwfbox
expires:202512180400;;742103

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
1004 am est wed dec 17 2025

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


anz232-180400-
nantucket sound-
1004 am est wed dec 17 2025

...gale warning in effect until 7 pm est this evening...

.this afternoon...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 10 seconds. 
.tonight...w winds 15 to 20 kt with gusts up to 30 kt,
diminishing to 10 to 15 kt with gusts up to 20 kt after midnight.
seas 3 to 5 ft. wave detail: w 4 ft at 5 seconds and se 1 foot at
10 seconds. 
.thu...s 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: s 2 ft
at 5 seconds and se 1 foot at 10 seconds. 
.thu night...s winds 15 to 20 kt with gusts up to 25 kt,
increasing to 25 to 30 kt with gusts up to 35 kt after midnight.
seas 3 to 5 ft. wave detail: s 5 ft at 5 seconds and se 1 foot at
11 seconds. a chance of rain after midnight. 
.fri...s winds 25 to 30 kt with gusts up to 50 kt. seas 5 to
7 ft. wave detail: s 6 ft at 6 seconds and se 5 ft at 14 seconds.
rain. vsby 1 to 3 nm. 
.fri night...w winds 30 to 35 kt, becoming 25 to 35 kt after
midnight. seas 5 to 7 ft. wave detail: w 6 ft at 5 seconds and s
4 ft at 10 seconds. 
.sat...w winds 25 to 30 kt with gusts up to 35 kt. seas 3 to
5 ft. 
.sat night through sun night...nw winds 25 to 30 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 171504
cwfbox
expires:202512180400;;742104

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
1004 am est wed dec 17 2025

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


anz233-180400-
vineyard sound-
1004 am est wed dec 17 2025

...gale warning in effect until 7 pm est this evening...

.this afternoon...sw winds 20 to 25 kt with gusts up to 35 kt.
seas 5 to 7 ft. wave detail: sw 6 ft at 7 seconds and se 1 foot
at 10 seconds. 
.tonight...w winds 20 to 25 kt with gusts up to 30 kt, becoming
nw 10 to 15 kt with gusts up to 20 kt after midnight. seas 4 to
6 ft. wave detail: sw 5 ft at 7 seconds and se 1 foot at
10 seconds. 
.thu...s 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: sw
3 ft at 7 seconds and se 1 foot at 10 seconds. 
.thu night...s winds 20 to 25 kt, increasing to 25 to 30 kt with
gusts up to 35 kt after midnight. seas 2 to 4 ft, building to
4 to 6 ft after midnight. wave detail: s 4 ft at 6 seconds and se
1 foot at 10 seconds, becoming s 6 ft at 6 seconds and se 1 foot
at 13 seconds. rain likely after midnight. 
.fri...s winds 30 to 35 kt, becoming sw 25 to 30 kt in the
afternoon. gusts up to 45 kt. seas 6 to 9 ft. wave detail: se
9 ft at 13 seconds and sw 8 ft at 8 seconds. rain. vsby 1 to
3 nm. 
.fri night...w winds 25 to 35 kt with gusts up to 40 kt. seas
6 to 9 ft. wave detail: s 9 ft at 11 seconds and w 6 ft at
8 seconds. 
.sat...w winds 25 to 30 kt. seas 4 to 6 ft. 
.sat night through sun night...nw winds 25 to 30 kt with gusts up
to 35 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 171504
cwfbox
expires:202512180400;;742105

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
1004 am est wed dec 17 2025

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


anz234-180400-
buzzards bay-
1004 am est wed dec 17 2025

...gale warning in effect until 7 pm est this evening...

.this afternoon...sw winds 20 to 25 kt with gusts up to 35 kt.
seas 3 to 5 ft. wave detail: sw 5 ft at 6 seconds and se 1 foot
at 10 seconds. 
.tonight...w winds 15 to 20 kt with gusts up to 30 kt,
diminishing to 10 to 15 kt with gusts up to 20 kt after midnight.
seas 3 to 5 ft. wave detail: sw 5 ft at 7 seconds and se 1 foot
at 10 seconds. 
.thu...s 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: sw
2 ft at 7 seconds and se 1 foot at 10 seconds. 
.thu night...s winds 20 to 25 kt, increasing to 25 to 30 kt with
gusts up to 35 kt after midnight. seas 3 to 5 ft. wave detail: s
5 ft at 5 seconds and se 1 foot at 10 seconds. rain likely after
midnight. 
.fri...s winds 30 to 35 kt, becoming sw 25 to 30 kt in the
afternoon. gusts up to 50 kt. seas 4 to 6 ft. wave detail: sw
6 ft at 7 seconds and se 6 ft at 13 seconds. rain. vsby 1 to
3 nm. 
.fri night...w winds 25 to 30 kt with gusts up to 40 kt. seas
4 to 6 ft. wave detail: sw 6 ft at 7 seconds and s 6 ft at
10 seconds. 
.sat through sun night...nw winds 25 to 30 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 171504
cwfbox
expires:202512180400;;742106

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
1004 am est wed dec 17 2025

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


anz235-180400-
rhode island sound-
1004 am est wed dec 17 2025

...gale warning in effect until 7 pm est this evening...

.this afternoon...sw winds 20 to 25 kt with gusts up to 35 kt.
seas 5 to 8 ft. wave detail: sw 7 ft at 7 seconds and se 1 foot
at 10 seconds. 
.tonight...w winds 20 to 25 kt, becoming nw 10 to 15 kt after
midnight. gusts up to 30 kt. seas 5 to 7 ft. wave detail: sw 7 ft
at 8 seconds and se 1 foot at 10 seconds. 
.thu...s winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. seas 2 to 4 ft. wave detail: sw
4 ft at 8 seconds and se 1 foot at 10 seconds. 
.thu night...s winds 20 to 25 kt, increasing to 25 to 30 kt with
gusts up to 40 kt after midnight. seas 3 to 5 ft, building to
5 to 7 ft after midnight. wave detail: s 5 ft at 7 seconds and se
1 foot at 10 seconds, becoming s 7 ft at 7 seconds and se 1 foot
at 12 seconds. a chance of rain in the evening, then rain likely
after midnight with vsby 1 to 3 nm. 
.fri...s winds 30 to 35 kt, becoming sw in the afternoon. gusts
up to 45 kt. seas 8 to 11 ft. wave detail: sw 11 ft at 8 seconds
and se 11 ft at 12 seconds. rain. vsby 1 to 3 nm. 
.fri night...w winds 30 to 35 kt, becoming 25 to 35 kt after
midnight. seas 8 to 11 ft. wave detail: s 11 ft at 11 seconds and
w 6 ft at 6 seconds. 
.sat...w winds 25 to 30 kt with gusts up to 35 kt. seas 5 to
8 ft. 
.sat night and sun...sw winds 25 to 30 kt with gusts up to 35 kt.
seas 4 to 6 ft. 
.sun night...nw 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 171504
cwfbox
expires:202512180400;;742109

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
1004 am est wed dec 17 2025

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


anz236-180400-
narragansett bay-
1004 am est wed dec 17 2025

...gale warning in effect until 7 pm est this evening...

.this afternoon...sw winds 15 to 20 kt with gusts up to 35 kt.
waves 2 to 4 ft. 
.tonight...w winds 15 to 20 kt, diminishing to 5 to 10 kt after
midnight. gusts up to 25 kt. waves 2 to 4 ft.
.thu...s winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. waves around 2 ft. 
.thu night...s winds 15 to 20 kt with gusts up to 25 kt,
increasing to 25 to 30 kt with gusts up to 40 kt after midnight.
waves 3 to 5 ft. a chance of rain in the evening, then rain
likely after midnight with vsby 1 to 3 nm. 
.fri...s winds 25 to 30 kt, becoming sw in the afternoon. gusts
up to 45 kt. waves 4 to 6 ft. rain. vsby 1 to 3 nm. 
.fri night...w winds 20 to 25 kt with gusts up to 35 kt. waves
4 to 6 ft, subsiding to 3 ft after midnight. at the bay entrance,
waves 5 to 7 ft. 
.sat through sun night...nw winds 20 to 25 kt with gusts up to
30 kt. waves 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 171504
cwfbox
expires:202512180400;;742097

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
1004 am est wed dec 17 2025

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


anz250-180400-
coastal waters east of ipswich bay and the stellwagen bank
national marine sanctuary-
1004 am est wed dec 17 2025

...gale warning in effect through late tonight...

.this afternoon...sw winds 20 to 25 kt with gusts up to 40 kt.
seas 4 to 6 ft. wave detail: sw 6 ft at 5 seconds and se 1 foot
at 10 seconds. 
.tonight...w winds 20 to 25 kt, becoming nw 15 to 20 kt after
midnight. gusts up to 35 kt. seas 4 to 6 ft. wave detail: w 5 ft
at 5 seconds and se 1 foot at 10 seconds. 
.thu...sw winds 5 to 10 kt, becoming s 15 to 20 kt with gusts up
to 25 kt in the afternoon. seas 2 to 3 ft. wave detail: s 3 ft at
4 seconds and se 1 foot at 10 seconds. 
.thu night...s winds 15 to 20 kt with gusts up to 25 kt,
increasing to 25 to 30 kt with gusts up to 35 kt after midnight.
seas 4 to 6 ft. wave detail: s 6 ft at 6 seconds and se 1 foot at
10 seconds. rain likely after midnight. 
.fri...s winds 25 to 35 kt with gusts up to 45 kt. seas 5 to
8 ft. wave detail: s 8 ft at 6 seconds and se 8 ft at 11 seconds.
rain. vsby 1 to 3 nm. 
.fri night...w winds around 30 kt with gusts up to 40 kt. seas
7 to 10 ft. wave detail: w 8 ft at 6 seconds and se 7 ft at
10 seconds. a chance of rain in the evening with vsby 1 to 3 nm. 
.sat...w winds 25 to 30 kt with gusts up to 35 kt. seas 5 to
8 ft. 
.sat night through sun night...w winds 20 to 25 kt with gusts up
to 30 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 171504
cwfbox
expires:202512180400;;742100

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
1004 am est wed dec 17 2025

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


anz254-180400-
coastal waters from provincetown ma to chatham ma to nantucket ma
out 20 nm-
1004 am est wed dec 17 2025

...gale warning in effect through late tonight...

.this afternoon...sw winds 20 to 25 kt with gusts up to 35 kt.
seas 5 to 7 ft. wave detail: sw 6 ft at 6 seconds and se 1 foot
at 10 seconds. 
.tonight...w winds 20 to 25 kt with gusts up to 35 kt, becoming
nw 15 to 20 kt with gusts up to 25 kt after midnight. seas 5 to
7 ft. wave detail: w 6 ft at 6 seconds and se 2 ft at 10 seconds.
.thu...sw winds 5 to 10 kt, becoming s 10 to 15 kt with gusts up
to 20 kt in the afternoon. seas 2 to 4 ft. wave detail: sw 3 ft
at 7 seconds and se 2 ft at 10 seconds. 
.thu night...s winds 15 to 20 kt, increasing to 20 to 25 kt after
midnight. gusts up to 30 kt. seas 4 to 6 ft. wave detail: s 6 ft
at 6 seconds and se 1 foot at 10 seconds. a chance of rain after
midnight. 
.fri...s winds 25 to 30 kt with gusts up to 50 kt. seas 7 to
10 ft. s and e of nantucket, seas 7 to 10 ft, building to 10 to
14 ft in the afternoon. wave detail: s 10 ft at 8 seconds. rain.
vsby 1 to 3 nm. 
.fri night...w winds 25 to 30 kt with gusts up to 40 kt. seas
8 to 11 ft, except 11 to 14 ft s and e of nantucket. wave detail:
s 11 ft at 10 seconds and w 8 ft at 6 seconds. rain likely in the
evening with vsby 1 to 3 nm. 
.sat...w winds 25 to 30 kt with gusts up to 35 kt. seas 6 to
9 ft. 
.sat night through sun night...nw winds 20 to 25 kt with gusts up
to 30 kt. seas 4 to 6 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 171504
cwfbox
expires:202512180400;;742101

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
1004 am est wed dec 17 2025

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


anz255-180400-
coastal waters extending out to 25 nm south of marthas vineyard
and nantucket-
1004 am est wed dec 17 2025

...gale warning in effect through late tonight...

.this afternoon...sw winds 20 to 25 kt with gusts up to 35 kt.
seas 6 to 9 ft. wave detail: sw 9 ft at 7 seconds and se 1 foot
at 10 seconds. 
.tonight...w winds 20 to 25 kt with gusts up to 35 kt, becoming
nw 15 to 20 kt with gusts up to 25 kt after midnight. seas 6 to
9 ft, subsiding to 5 to 7 ft after midnight. wave detail: sw 9 ft
at 8 seconds, becoming sw 7 ft at 8 seconds and se 1 foot at
10 seconds.
.thu...se winds 5 to 10 kt, becoming s 10 to 15 kt with gusts up
to 20 kt in the afternoon. seas 3 to 5 ft. wave detail: sw 4 ft
at 8 seconds and se 1 foot at 10 seconds. 
.thu night...s winds 20 to 25 kt, increasing to 25 to 30 kt with
gusts up to 35 kt after midnight. seas 4 to 6 ft, building to
5 to 8 ft after midnight. wave detail: s 6 ft at 7 seconds and se
1 foot at 10 seconds, becoming s 8 ft at 7 seconds and se 1 foot
at 14 seconds. a chance of rain after midnight. 
.fri...s winds 30 to 35 kt with gusts up to 50 kt. seas 7 to
10 ft, building to 10 to 14 ft in the afternoon. wave detail: s
10 ft at 7 seconds and se 7 ft at 13 seconds, becoming s 14 ft at
9 seconds. rain. vsby 1 to 3 nm. 
.fri night...w winds 30 to 40 kt with gusts up to 45 kt. seas
10 to 14 ft. wave detail: sw 14 ft at 11 seconds and w 12 ft at
9 seconds. 
.sat...w winds 25 to 30 kt with gusts up to 40 kt. seas 7 to
10 ft. 
.sat night through sun night...nw winds 25 to 30 kt with gusts up
to 35 kt. seas 5 to 7 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.

$$