fzus51 kbox 180904
cwfbox
expires:202512182200;;787761

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
403 am est thu dec 18 2025

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


anz231-182200-
cape cod bay-
403 am est thu dec 18 2025

...storm warning in effect from friday morning through friday
afternoon...

.today...sw winds 5 to 10 kt, becoming s 10 to 15 kt with gusts
up to 20 kt this afternoon. seas 1 foot or less, then around 2 ft
this afternoon. wave detail: nw 1 foot at 4 seconds and se 1 foot
at 10 seconds, becoming s 1 foot at 4 seconds and se 1 foot at
8 seconds. 
.tonight...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. a chance of rain after
midnight with vsby 1 to 3 nm. 
.fri...s winds 25 to 35 kt. gusts up to 45 kt, increasing to
55 kt in the afternoon. seas 4 to 6 ft. wave detail: s 6 ft at
5 seconds and s 6 ft at 9 seconds. rain. vsby 1 nm or less. 
.fri night...w winds 25 to 30 kt with gusts up to 40 kt. seas
4 to 6 ft. wave detail: w 5 ft at 5 seconds and s 5 ft at
10 seconds. a chance of rain in the evening. 
.sat...w winds 20 to 25 kt with gusts up to 30 kt, diminishing to
10 to 15 kt with gusts up to 20 kt in the afternoon. seas 3 to
5 ft. wave detail: w 5 ft at 5 seconds and s 3 ft at 11 seconds. 
.sat night...sw winds 15 to 20 kt with gusts up to 30 kt. seas
2 to 4 ft. wave detail: sw 3 ft at 4 seconds and se 2 ft at
9 seconds. 
.sun and sun night...sw winds 15 to 20 kt, becoming w 25 to
30 kt. seas 3 to 5 ft. 
.mon...nw winds 25 to 30 kt. seas 3 to 5 ft. a chance of light
freezing spray. 
.mon night...nw 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 180904
cwfbox
expires:202512182200;;787765

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
403 am est thu dec 18 2025

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


anz232-182200-
nantucket sound-
403 am est thu dec 18 2025

...storm warning in effect from friday morning through friday
afternoon...

.today...sw winds 5 to 10 kt, becoming s 10 to 15 kt this
afternoon. seas 2 to 3 ft. wave detail: s 2 ft at 5 seconds and
se 1 foot at 10 seconds. 
.tonight...s winds 15 to 20 kt, increasing to 20 to 25 kt after
midnight. gusts up to 30 kt. 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 with vsby 1 to 3 nm. 
.fri...s winds 25 to 35 kt, becoming 30 to 35 kt in the
afternoon. gusts up to 50 kt. seas 5 to 7 ft, building to 6 to
9 ft in the afternoon. wave detail: se 7 ft at 13 seconds and s
6 ft at 6 seconds, becoming s 7 ft at 9 seconds and s 6 ft at
5 seconds. rain. vsby 1 nm or less. 
.fri night...w winds 30 to 35 kt with gusts up to 40 kt. seas
6 to 9 ft. wave detail: w 6 ft at 5 seconds and s 4 ft at
10 seconds. a chance of rain in the evening. 
.sat...w winds 25 to 30 kt with gusts up to 35 kt, diminishing to
around 15 kt with gusts up to 20 kt in the afternoon. seas 4 to
6 ft. wave detail: w 6 ft at 5 seconds and s 2 ft at 11 seconds. 
.sat night...sw winds 15 to 20 kt, increasing to 20 to 25 kt
after midnight. gusts up to 30 kt. seas 2 to 4 ft, building to
4 to 6 ft after midnight. wave detail: sw 3 ft at 4 seconds and s
2 ft at 10 seconds, becoming sw 5 ft at 5 seconds and se 1 foot
at 10 seconds. 
.sun and sun night...sw winds 20 to 25 kt, becoming nw 25 to
30 kt. seas 4 to 6 ft. 
.mon...nw winds 25 to 30 kt. seas 4 to 6 ft. a chance of light
freezing spray. 
.mon night...nw winds 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 180904
cwfbox
expires:202512182200;;787766

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
403 am est thu dec 18 2025

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


anz233-182200-
vineyard sound-
403 am est thu dec 18 2025

...storm warning in effect from friday morning through friday
afternoon...

.today...s winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt this afternoon. seas 2 to 3 ft. wave detail: sw 3 ft
at 7 seconds and se 1 foot at 10 seconds. 
.tonight...se winds 15 to 20 kt with gusts up to 25 kt, becoming
s 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 3 ft
at 6 seconds and se 1 foot at 10 seconds, becoming s 5 ft at
5 seconds and se 1 foot at 13 seconds. a chance of rain after
midnight with vsby 1 nm or less. 
.fri...s winds 30 to 40 kt with gusts up to 50 kt. seas 7 to
10 ft. wave detail: s 10 ft at 12 seconds and s 7 ft at
6 seconds. rain. vsby 1 nm or less. 
.fri night...w winds 30 to 35 kt, becoming 25 to 35 kt after
midnight. seas 7 to 10 ft. wave detail: s 10 ft at 11 seconds and
w 6 ft at 7 seconds. a chance of rain in the evening. 
.sat...w winds 25 to 30 kt with gusts up to 35 kt, diminishing to
10 to 15 kt with gusts up to 20 kt in the afternoon. seas 5 to
7 ft, subsiding to 3 to 5 ft in the afternoon. wave detail: sw
6 ft at 10 seconds and w 5 ft at 7 seconds, becoming sw 5 ft at
10 seconds and w 3 ft at 6 seconds. 
.sat night...sw winds 20 to 25 kt, increasing to 25 to 30 kt
after midnight. seas 4 to 6 ft, building to 5 to 8 ft after
midnight. wave detail: sw 5 ft at 5 seconds and s 3 ft at
10 seconds, becoming sw 7 ft at 7 seconds and se 2 ft at
10 seconds. 
.sun...w winds 25 to 30 kt. seas 5 to 7 ft. 
.sun night...nw winds 25 to 30 kt with gusts up to 35 kt. seas
4 to 6 ft. 
.mon...nw winds 25 to 30 kt. seas 3 to 5 ft. a chance of light
freezing spray. 
.mon night...nw winds 15 to 20 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 180904
cwfbox
expires:202512182200;;787767

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
403 am est thu dec 18 2025

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


anz234-182200-
buzzards bay-
403 am est thu dec 18 2025

...storm warning in effect from friday morning through friday
afternoon...

.today...sw winds around 5 kt, becoming s 10 to 15 kt with gusts
up to 20 kt this afternoon. seas around 2 ft. wave detail: sw
2 ft at 7 seconds and se 1 foot at 10 seconds. 
.tonight...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 2 to
3 ft, building to 3 to 5 ft after midnight. wave detail: s 3 ft
at 5 seconds and se 1 foot at 10 seconds, becoming s 5 ft at
5 seconds and se 1 foot at 13 seconds. a chance of rain after
midnight with vsby 1 nm or less. 
.fri...s winds 30 to 40 kt, becoming sw 25 to 35 kt in the
afternoon. gusts up to 50 kt. seas 5 to 8 ft. wave detail: sw
8 ft at 10 seconds and s 6 ft at 5 seconds. rain. vsby 1 nm or
less. 
.fri night...w winds 25 to 30 kt with gusts up to 40 kt. seas
5 to 7 ft. wave detail: s 7 ft at 10 seconds and sw 6 ft at
6 seconds. a chance of rain in the evening. 
.sat...w winds 20 to 25 kt with gusts up to 30 kt, diminishing to
10 to 15 kt with gusts up to 20 kt in the afternoon. seas 4 to
6 ft, subsiding to 2 to 4 ft in the afternoon. wave detail: w
5 ft at 7 seconds and sw 5 ft at 10 seconds, becoming s 4 ft at
10 seconds and w 3 ft at 6 seconds. 
.sat night...sw winds 20 to 25 kt, increasing to 25 to 30 kt with
gusts up to 35 kt after midnight. seas 4 to 6 ft. wave detail: sw
6 ft at 6 seconds and s 3 ft at 10 seconds. 
.sun...w winds 25 to 30 kt. seas 4 to 6 ft. 
.sun night...nw winds 20 to 25 kt with gusts up to 30 kt. seas
3 to 5 ft. 
.mon...nw winds 20 to 25 kt with gusts up to 30 kt. seas 3 to
4 ft. a chance of light freezing spray. 
.mon night...nw winds 10 to 15 kt with gusts up to 20 kt. seas
around 2 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 180904
cwfbox
expires:202512182200;;787768

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
403 am est thu dec 18 2025

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


anz235-182200-
rhode island sound-
403 am est thu dec 18 2025

...gale warning in effect from late tonight through saturday
morning...

.today...s winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt this afternoon. seas 2 to 4 ft. wave detail: s 4 ft
at 8 seconds and se 2 ft at 10 seconds. 
.tonight...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, 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 13 seconds. a chance of rain after
midnight with vsby 1 nm or less. 
.fri...s winds 30 to 40 kt with gusts up to 50 kt. seas 8 to
11 ft, building to 9 to 13 ft in the afternoon. wave detail: s
11 ft at 12 seconds and s 10 ft at 7 seconds, becoming s 13 ft at
10 seconds and sw 3 ft at 6 seconds. rain. vsby 1 nm or less. 
.fri night...w winds 30 to 35 kt, becoming 25 to 35 kt after
midnight. seas 9 to 12 ft. wave detail: s 12 ft at 11 seconds and
w 6 ft at 6 seconds. 
.sat...w winds 25 to 30 kt with gusts up to 35 kt, diminishing to
around 15 kt with gusts up to 20 kt in the afternoon. seas 6 to
9 ft, subsiding to 4 to 6 ft in the afternoon. wave detail: s
9 ft at 10 seconds and w 6 ft at 6 seconds, becoming s 6 ft at
10 seconds and w 3 ft at 6 seconds. 
.sat night...sw winds 20 to 25 kt, increasing to 25 to 30 kt
after midnight. seas 4 to 6 ft, building to 6 to 9 ft after
midnight. wave detail: sw 6 ft at 5 seconds and s 5 ft at
10 seconds, becoming sw 9 ft at 7 seconds and se 3 ft at
10 seconds. 
.sun...w winds 25 to 30 kt. seas 6 to 9 ft. 
.sun night...nw winds 25 to 30 kt with gusts up to 35 kt. seas
5 to 7 ft. 
.mon...nw winds 20 to 25 kt with gusts up to 30 kt. seas 4 to
6 ft. 
.mon night...nw winds 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 180904
cwfbox
expires:202512182200;;787771

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
403 am est thu dec 18 2025

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


anz236-182200-
narragansett bay-
403 am est thu dec 18 2025

...gale warning in effect from late tonight through late friday
night...

.today...sw winds around 5 kt, becoming s 10 to 15 kt this
afternoon. waves around 2 ft. 
.tonight...s winds 15 to 20 kt with gusts up to 25 kt, increasing
to 20 to 25 kt with gusts up to 35 kt after midnight. waves 2 to
3 ft, building to 3 to 5 ft after midnight. a chance of rain
after midnight with vsby 1 nm or less. 
.fri...s winds 25 to 35 kt with gusts up to 45 kt. waves 5 to
7 ft, except 7 to 10 ft at the bay entrance. rain. vsby 1 nm or
less. 
.fri night...w winds 20 to 25 kt with gusts up to 35 kt. waves
5 to 7 ft. 
.sat...w winds 15 to 20 kt with gusts up to 30 kt, diminishing to
10 to 15 kt with gusts up to 20 kt in the afternoon. waves 2 to
3 ft. at the bay entrance, waves 4 to 6 ft, subsiding to 3 to
4 ft in the afternoon. 
.sat 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. 
.sun...w winds 20 to 25 kt with gusts up to 30 kt. waves 3 to
5 ft. 
.sun night through mon night...nw 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 180904
cwfbox
expires:202512182200;;787759

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
403 am est thu dec 18 2025

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


anz250-182200-
coastal waters east of ipswich bay and the stellwagen bank
national marine sanctuary-
403 am est thu dec 18 2025

...gale warning in effect from late tonight through saturday
morning...

.today...sw winds 5 to 10 kt, becoming s 15 to 20 kt with gusts
up to 25 kt this afternoon. seas 2 to 4 ft. wave detail: s 3 ft
at 4 seconds and se 1 foot at 10 seconds. 
.tonight...s winds 15 to 20 kt with gusts up to 25 kt, increasing
to 20 to 25 kt with gusts up to 35 kt after midnight. seas 3 to
5 ft, building to 5 to 7 ft after midnight. wave detail: s 4 ft
at 5 seconds and se 1 foot at 10 seconds, becoming s 6 ft at
5 seconds and se 1 foot at 11 seconds. a chance of rain after
midnight with vsby 1 nm or less. 
.fri...s winds 25 to 35 kt, increasing to 30 to 40 kt in the
afternoon. gusts up to 50 kt. seas 6 to 9 ft, building to 8 to
11 ft in the afternoon. wave detail: se 9 ft at 11 seconds and s
7 ft at 6 seconds, becoming se 11 ft at 9 seconds and s 7 ft at
7 seconds. rain. vsby 1 nm or less. 
.fri night...w winds 25 to 30 kt with gusts up to 40 kt. seas
8 to 11 ft. wave detail: se 9 ft at 10 seconds and w 8 ft at
6 seconds. a chance of rain in the evening. 
.sat...w winds 25 to 30 kt with gusts up to 35 kt, diminishing to
around 15 kt with gusts up to 20 kt in the afternoon. seas 6 to
9 ft, subsiding to 5 to 7 ft in the afternoon. wave detail: w
8 ft at 6 seconds and se 5 ft at 11 seconds, becoming w 5 ft at
6 seconds and se 4 ft at 11 seconds. 
.sat night...sw 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:
sw 5 ft at 5 seconds and se 3 ft at 11 seconds. 
.sun...w winds 20 to 25 kt with gusts up to 30 kt. seas 4 to
6 ft. 
.sun night and mon...nw winds 25 to 30 kt with gusts up to 35 kt.
seas 5 to 8 ft. 
.mon night...nw winds 15 to 20 kt with gusts up to 25 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 180904
cwfbox
expires:202512182200;;787762

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
403 am est thu dec 18 2025

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


anz254-182200-
coastal waters from provincetown ma to chatham ma to nantucket ma
out 20 nm-
403 am est thu dec 18 2025

...storm warning in effect from friday morning through friday
afternoon...

.today...sw winds 5 to 10 kt, becoming s 10 to 15 kt with gusts
up to 20 kt this afternoon. seas 2 to 4 ft. wave detail: w 3 ft
at 5 seconds and s 2 ft at 9 seconds. 
.tonight...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 2 ft at 10 seconds. 
.fri...s winds 25 to 30 kt, increasing to 30 to 35 kt in the
afternoon. gusts up to 50 kt. seas 6 to 9 ft, building to 9 to
13 ft in the afternoon. wave detail: s 9 ft at 7 seconds and se
9 ft at 12 seconds, becoming s 13 ft at 9 seconds and s 3 ft at
5 seconds. rain. vsby 1 nm or less. 
.fri night...w winds 25 to 30 kt with gusts up to 45 kt. seas
9 to 13 ft, except 12 to 16 ft s and e of nantucket. wave detail:
s 13 ft at 11 seconds and w 8 ft at 6 seconds. a chance of rain
in the evening. 
.sat...w winds 25 to 30 kt with gusts up to 35 kt, diminishing to
10 to 15 kt with gusts up to 20 kt in the afternoon. seas 7 to
10 ft, subsiding to 5 to 7 ft in the afternoon. wave detail: w
8 ft at 7 seconds and s 7 ft at 11 seconds, becoming w 5 ft at
7 seconds and s 5 ft at 10 seconds. 
.sat night...sw 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: s
6 ft at 6 seconds and s 4 ft at 10 seconds. 
.sun...sw winds 20 to 25 kt with gusts up to 30 kt. seas 5 to
7 ft. 
.sun night and mon...nw winds 25 to 30 kt with gusts up to 35 kt.
seas 6 to 9 ft. 
.mon night...nw winds 15 to 20 kt with gusts up to 25 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 180904
cwfbox
expires:202512182200;;787763

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
403 am est thu dec 18 2025

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


anz255-182200-
coastal waters extending out to 25 nm south of marthas vineyard
and nantucket-
403 am est thu dec 18 2025

...storm warning in effect from friday morning through friday
afternoon...

.today...s winds 5 to 10 kt, becoming se 10 to 15 kt with gusts
up to 20 kt this afternoon. seas 3 to 4 ft. wave detail: sw 4 ft
at 8 seconds and se 1 foot at 10 seconds. 
.tonight...se winds 20 to 25 kt, becoming s 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 5 ft at 7 seconds and se
1 foot at 10 seconds, becoming s 8 ft at 7 seconds and se 1 foot
at 13 seconds. 
.fri...s winds 30 to 40 kt with gusts up to 50 kt. seas 8 to
11 ft, building to 11 to 15 ft in the afternoon. wave detail: s
11 ft at 7 seconds and s 11 ft at 14 seconds, becoming s 15 ft at
10 seconds and s 2 ft at 5 seconds. rain. vsby 1 nm or less. 
.fri night...w winds 30 to 40 kt with gusts up to 45 kt. seas
11 to 15 ft. wave detail: s 15 ft at 11 seconds and w 13 ft at
9 seconds. a chance of rain in the evening. 
.sat...w winds 25 to 30 kt with gusts up to 35 kt, diminishing to
15 to 20 kt in the afternoon. seas 9 to 12 ft, subsiding to 5 to
8 ft in the afternoon. wave detail: w 11 ft at 9 seconds and s
10 ft at 10 seconds, becoming w 6 ft at 8 seconds and s 6 ft at
10 seconds.
.sat night...sw winds 20 to 25 kt, increasing to 25 to 30 kt
after midnight. seas 5 to 7 ft, building to 7 to 10 ft after
midnight. wave detail: sw 6 ft at 6 seconds and s 5 ft at
10 seconds, becoming sw 10 ft at 7 seconds and se 4 ft at
9 seconds. 
.sun and sun night...w winds 25 to 30 kt, becoming nw 25 to
35 kt. seas 8 to 11 ft. 
.mon...nw winds 25 to 35 kt. seas 7 to 10 ft. 
.mon night...nw winds 20 to 25 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.

$$