fzus51 kbox 210504
cwfbox
expires:202610211800;;919953

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
103 am edt wed oct 21 2026

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


anz231-211800-
cape cod bay-
103 am edt wed oct 21 2026

...gale warning in effect through thursday morning...

.rest of tonight...ne winds 25 to 30 kt. seas 4 to 6 ft. wave
detail: e 6 ft at 10 seconds and n 5 ft at 5 seconds. 
.wed...ne winds 25 to 30 kt, diminishing to 20 to 25 kt in the
afternoon. seas 4 to 6 ft. wave detail: e 6 ft at 9 seconds and n
5 ft at 5 seconds. 
.wed night...ne winds 25 to 30 kt with gusts up to 35 kt. seas
4 to 6 ft. wave detail: e 6 ft at 10 seconds and n 5 ft at
5 seconds. patchy fog. showers. a chance of tstms in the evening,
then tstms likely after midnight. vsby 1 to 3 nm. 
.thu...n winds 25 to 30 kt, diminishing to 20 to 25 kt in the
afternoon. seas 4 to 6 ft. wave detail: n 6 ft at 5 seconds and e
6 ft at 10 seconds. 
.thu night and fri...n winds 25 to 30 kt with gusts up to 35 kt.
seas 4 to 6 ft. wave detail: n 6 ft at 6 seconds and e 5 ft at
9 seconds. 
.fri night...n winds 10 to 15 kt with gusts up to 25 kt. seas
3 to 5 ft. wave detail: n 5 ft at 7 seconds and e 2 ft at
13 seconds. 
.sat and sat night...nw winds 5 to 10 kt, becoming w. seas 2 to
4 ft. 
.sun and sun night...sw winds 5 to 10 kt. seas around 2 ft.  

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 210504
cwfbox
expires:202610211800;;919957

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
103 am edt wed oct 21 2026

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


anz232-211800-
nantucket sound-
103 am edt wed oct 21 2026

...gale warning in effect through thursday morning...

.rest of tonight...ne winds 25 to 30 kt with gusts up to 35 kt.
seas 4 to 6 ft. wave detail: n 5 ft at 5 seconds and e 4 ft at
10 seconds. 
.wed...ne winds 25 to 30 kt with gusts up to 40 kt. seas 4 to
6 ft. wave detail: nw 6 ft at 8 seconds and ne 5 ft at 5 seconds.
patchy fog in the afternoon. a chance of showers and tstms in the
afternoon with vsby 1 to 3 nm. 
.wed night...ne winds 25 to 35 kt, becoming n 30 to 35 kt after
midnight. seas 4 to 6 ft. wave detail: n 6 ft at 6 seconds and e
4 ft at 10 seconds. patchy fog. showers. a chance of tstms in the
evening, then tstms likely after midnight. vsby 1 to 3 nm. 
.thu...n winds 25 to 35 kt with gusts up to 40 kt. seas 4 to
6 ft. wave detail: n 5 ft at 5 seconds and e 4 ft at 10 seconds.
patchy fog in the morning. showers with a chance of tstms in the
morning with vsby 1 to 3 nm.
.thu night and fri...n winds 25 to 35 kt. seas 4 to 6 ft. wave
detail: n 5 ft at 5 seconds and e 3 ft at 9 seconds. 
.fri night...n winds 15 to 20 kt with gusts up to 25 kt,
diminishing to 10 to 15 kt after midnight. seas 3 to 5 ft. wave
detail: n 4 ft at 4 seconds and e 2 ft at 10 seconds. 
.sat through sun night...sw winds 10 to 15 kt. seas 2 to 4 ft.  

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 210504
cwfbox
expires:202610211800;;919958

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
103 am edt wed oct 21 2026

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


anz233-211800-
vineyard sound-
103 am edt wed oct 21 2026

...gale warning in effect through thursday morning...

.rest of tonight...ne winds 25 to 30 kt. seas 3 to 5 ft. wave
detail: n 4 ft at 5 seconds and se 1 foot at 10 seconds. 
.wed...ne winds 25 to 30 kt with gusts up to 35 kt. seas 4 to
6 ft. wave detail: n 4 ft at 8 seconds and ne 3 ft at 4 seconds. 
.wed night...ne winds 25 to 30 kt with gusts up to 35 kt. seas
3 to 5 ft. wave detail: n 5 ft at 5 seconds and se 2 ft at
10 seconds. patchy fog. showers. a chance of tstms in the
evening, then tstms likely after midnight. vsby 1 to 3 nm. 
.thu...n winds 25 to 30 kt with gusts up to 35 kt. seas 4 to
6 ft, subsiding to 3 to 4 ft in the afternoon. wave detail: n
6 ft at 5 seconds and se 2 ft at 10 seconds, becoming n 4 ft at
4 seconds and se 2 ft at 10 seconds. 
.thu night through fri night...n winds 20 to 25 kt with gusts up
to 30 kt. seas 2 to 4 ft. wave detail: n 4 ft at 4 seconds and se
2 ft at 10 seconds. 
.sat through sun night...sw winds 5 to 10 kt. seas around 2 ft.
wave detail: sw 2 ft at 4 seconds and e 2 ft at 6 seconds.  

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 210504
cwfbox
expires:202610211800;;919959

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
103 am edt wed oct 21 2026

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


anz234-211800-
buzzards bay-
103 am edt wed oct 21 2026

...gale warning in effect through thursday morning...

.rest of tonight...ne winds 25 to 30 kt. seas 3 to 5 ft. wave
detail: n 4 ft at 5 seconds and e 2 ft at 10 seconds. 
.wed...ne winds 25 to 30 kt with gusts up to 35 kt. seas 4 to
6 ft. wave detail: n 4 ft at 7 seconds and ne 3 ft at 4 seconds. 
.wed night...ne winds 25 to 30 kt. seas 3 to 5 ft. wave detail: n
5 ft at 5 seconds and e 2 ft at 10 seconds. patchy fog. showers.
a chance of tstms in the evening, then tstms likely after
midnight. vsby 1 to 3 nm. 
.thu...n winds 25 to 30 kt with gusts up to 35 kt. seas 3 to
5 ft. wave detail: n 5 ft at 5 seconds and e 2 ft at 10 seconds. 
.thu night through fri night...n winds 20 to 25 kt with gusts up
to 30 kt. seas 2 to 3 ft. wave detail: n 3 ft at 4 seconds and se
1 foot at 10 seconds. 
.sat through sun night...sw winds 5 to 10 kt. seas around 2 ft.
wave detail: n 1 foot at 2 seconds and e 1 foot at 9 seconds.  

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 210504
cwfbox
expires:202610211800;;919960

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
103 am edt wed oct 21 2026

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


anz235-211800-
rhode island sound-
103 am edt wed oct 21 2026

...gale warning in effect through thursday morning...

.rest of tonight...ne winds 25 to 30 kt with gusts up to 35 kt.
seas 4 to 6 ft. wave detail: n 5 ft at 5 seconds and se 5 ft at
10 seconds. 
.wed...ne winds 25 to 30 kt with gusts up to 35 kt. seas 5 to
7 ft. wave detail: n 5 ft at 5 seconds and se 5 ft at 10 seconds.
.wed night...ne winds 25 to 30 kt with gusts up to 35 kt. seas
5 to 7 ft. wave detail: n 5 ft at 5 seconds and se 5 ft at
11 seconds. patchy fog. showers with a chance of tstms. vsby 1 to
3 nm. 
.thu...n winds 25 to 30 kt with gusts up to 35 kt. seas 5 to
7 ft. wave detail: n 7 ft at 6 seconds and se 5 ft at 10 seconds.
.thu night and fri...n winds 20 to 25 kt with gusts up to 30 kt.
seas 3 to 5 ft. wave detail: n 4 ft at 4 seconds and se 3 ft at
10 seconds. 
.fri night...n winds 10 to 15 kt. seas 2 to 4 ft. wave detail: n
2 ft at 4 seconds and se 1 foot at 10 seconds. 
.sat through sun night...sw winds 5 to 10 kt. seas 2 to 3 ft.  

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 210504
cwfbox
expires:202610211800;;919963

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
103 am edt wed oct 21 2026

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


anz236-211800-
narragansett bay-
103 am edt wed oct 21 2026

...small craft advisory in effect through late tonight...

.rest of tonight...ne winds 15 to 20 kt with gusts up to 30 kt.
waves around 3 ft. 
.wed...ne winds 20 to 25 kt with gusts up to 30 kt. waves around
3 ft. 
.wed night...n winds 15 to 20 kt, increasing to 20 to 25 kt after
midnight. gusts up to 30 kt. waves around 3 ft. patchy fog in the
evening. a chance of tstms in the evening. 
.thu...n winds 20 to 25 kt, diminishing to 15 to 20 kt in the
afternoon. gusts up to 30 kt. waves 2 to 3 ft. 
.thu night through fri night...n winds 15 to 20 kt with gusts up
to 25 kt. waves 2 to 3 ft. 
.sat through sun night...sw winds 5 to 10 kt. waves around 2 ft. 

winds and waves 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 210504
cwfbox
expires:202610211800;;919951

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
103 am edt wed oct 21 2026

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


anz250-211800-
coastal waters east of ipswich bay and the stellwagen bank
national marine sanctuary-
103 am edt wed oct 21 2026

...small craft advisory in effect through thursday afternoon...
...gale watch in effect from thursday afternoon through friday
afternoon...

.rest of tonight...ne winds 20 to 25 kt with gusts up to 30 kt.
seas 7 to 9 ft. wave detail: ne 9 ft at 8 seconds and nw 2 ft at
5 seconds. 
.wed...ne winds 20 to 25 kt with gusts up to 30 kt. seas 7 to
9 ft. wave detail: ne 9 ft at 8 seconds and nw 2 ft at 5 seconds.
.wed night...ne winds 20 to 25 kt with gusts up to 30 kt. seas
7 to 9 ft. wave detail: e 9 ft at 10 seconds and n 7 ft at
6 seconds. a chance of showers. 
.thu...n winds 20 to 25 kt with gusts up to 30 kt. seas 6 to
9 ft. wave detail: e 8 ft at 10 seconds and ne 7 ft at 9 seconds.
.thu night and fri...n winds 25 to 30 kt with gusts up to 35 kt.
seas 6 to 9 ft. wave detail: ne 9 ft at 15 seconds and e 7 ft at
9 seconds. 
.fri night...n winds 10 to 15 kt with gusts up to 20 kt. seas
5 to 8 ft. wave detail: ne 7 ft at 8 seconds and nw 4 ft at
5 seconds. 
.sat...w winds 5 to 10 kt. seas 4 to 6 ft. 
.sat night through sun night...sw winds 5 to 10 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 210504
cwfbox
expires:202610211800;;919954

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
103 am edt wed oct 21 2026

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


anz254-211800-
coastal waters from provincetown ma to chatham ma to nantucket ma
out 20 nm-
103 am edt wed oct 21 2026

...gale warning in effect through thursday evening...

.rest of tonight...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 ne 7 ft at
7 seconds. 
.wed...ne winds 25 to 30 kt with gusts up to 40 kt. seas 8 to
11 ft. wave detail: e 11 ft at 10 seconds and ne 7 ft at
8 seconds. patchy fog in the afternoon. a chance of showers and
tstms in the afternoon with vsby 1 nm or less. 
.wed night...ne winds 25 to 30 kt with gusts up to 40 kt. seas
8 to 11 ft. wave detail: e 11 ft at 10 seconds and n 5 ft at
5 seconds. patchy fog. showers. a chance of tstms in the evening,
then tstms likely after midnight. vsby 1 to 3 nm. 
.thu...n winds 25 to 35 kt with gusts up to 40 kt. seas 8 to
11 ft. wave detail: e 10 ft at 10 seconds and ne 8 ft at
8 seconds. patchy fog in the morning. showers with a chance of
tstms in the morning with vsby 1 to 3 nm. 
.thu night and fri...n winds 25 to 30 kt with gusts up to 35 kt.
seas 7 to 10 ft. wave detail: ne 10 ft at 9 seconds and e 7 ft at
10 seconds. 
.fri night...n winds 20 to 25 kt, diminishing to 10 to 15 kt
after midnight. seas 6 to 9 ft. wave detail: ne 9 ft at 9 seconds
and e 8 ft at 9 seconds. 
.sat...nw winds 10 to 15 kt. seas 5 to 8 ft. 
.sat night and sun...w winds 5 to 10 kt. seas 4 to 6 ft. 
.sun night...sw winds 5 to 10 kt. seas 2 to 4 ft.  

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 210504
cwfbox
expires:202610211800;;919955

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
103 am edt wed oct 21 2026

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


anz255-211800-
coastal waters extending out to 25 nm south of marthas vineyard
and nantucket-
103 am edt wed oct 21 2026

...gale warning in effect through thursday evening...

.rest of tonight...ne winds 30 to 35 kt with gusts up to 40 kt.
seas 7 to 10 ft. wave detail: e 9 ft at 9 seconds and n 7 ft at
6 seconds. 
.wed...ne winds 30 to 35 kt with gusts up to 40 kt. seas 7 to
10 ft. wave detail: e 10 ft at 10 seconds and ne 7 ft at
6 seconds. patchy fog in the afternoon. showers with a chance of
tstms in the afternoon with vsby 1 nm or less. 
.wed night...ne winds 30 to 40 kt. seas 8 to 11 ft. wave detail:
e 10 ft at 10 seconds and n 7 ft at 7 seconds. patchy fog.
showers. a chance of tstms in the evening, then tstms likely
after midnight. vsby 1 nm or less, increasing to 1 to 3 nm after
midnight. 
.thu...n winds 30 to 40 kt, diminishing to 25 to 35 kt in the
afternoon. seas 8 to 11 ft, subsiding to 6 to 9 ft in the
afternoon. wave detail: e 10 ft at 10 seconds and n 8 ft at
6 seconds, becoming n 8 ft at 6 seconds and e 7 ft at 10 seconds.
patchy fog in the morning. showers with a chance of tstms in the
morning with vsby 1 to 3 nm. 
.thu night and fri...n winds 25 to 35 kt with gusts up to 40 kt.
seas 6 to 9 ft. wave detail: n 8 ft at 6 seconds and e 6 ft at
9 seconds. 
.fri night...n winds 20 to 25 kt, diminishing to around 15 kt
after midnight. seas 5 to 7 ft. wave detail: n 6 ft at 6 seconds
and e 6 ft at 10 seconds. 
.sat and sat night...nw winds 10 to 15 kt, becoming w around
5 kt. seas 4 to 6 ft. 
.sun...w winds 5 to 10 kt. seas 3 to 5 ft. 
.sun night...sw winds 5 to 10 kt. seas 2 to 4 ft.  

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.

$$