fzus51 kbox 210505
cwfbox
expires:202607211800;;328533

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
104 am edt tue jul 21 2026

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


anz231-211800-
cape cod bay-
104 am edt tue jul 21 2026

...gale watch in effect from this afternoon through wednesday
evening...

.rest of tonight...s winds 5 to 10 kt. seas 1 foot or less. wave
detail: sw 1 foot at 3 seconds and e 1 foot at 4 seconds. 
.tue...s winds 10 to 15 kt with gusts up to 25 kt. seas 2 to
3 ft. wave detail: s 2 ft at 4 seconds and e 1 foot at
12 seconds. 
.tue night...s winds 15 to 20 kt with gusts up to 30 kt. seas
3 to 4 ft. wave detail: s 4 ft at 4 seconds and e 1 foot at
11 seconds. showers with a chance of tstms in the evening, then
showers after midnight. 
.wed...sw winds 15 to 20 kt with gusts up to 30 kt. seas 3 to
4 ft. wave detail: sw 3 ft at 4 seconds and se 2 ft at 8 seconds.
showers likely, mainly in the morning. 
.wed night...sw winds 15 to 20 kt with gusts up to 25 kt,
becoming w 5 to 10 kt after midnight. seas 2 to 4 ft. wave
detail: se 4 ft at 10 seconds and sw 3 ft at 4 seconds. a chance
of showers. 
.thu and thu night...nw winds 5 to 10 kt. seas around 2 ft. wave
detail: s 2 ft at 7 seconds and s 2 ft at 10 seconds. 
.fri through sat night...s winds around 5 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 210505
cwfbox
expires:202607211800;;328537

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
104 am edt tue jul 21 2026

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


anz232-211800-
nantucket sound-
104 am edt tue jul 21 2026

...gale watch in effect from this afternoon through wednesday
evening...

.rest of tonight...s winds around 10 kt. seas around 2 ft. wave
detail: sw 1 foot at 3 seconds and s 1 foot at 7 seconds. 
.tue...s winds 10 to 15 kt, becoming se 15 to 20 kt in the
afternoon. gusts up to 25 kt. seas 2 to 3 ft. wave detail: s 2 ft
at 4 seconds and e 1 foot at 12 seconds. 
.tue night...s winds 20 to 25 kt, becoming sw 25 to 30 kt after
midnight. seas 3 to 4 ft, building to 4 to 6 ft after midnight.
wave detail: sw 4 ft at 7 seconds and se 3 ft at 4 seconds,
becoming sw 5 ft at 6 seconds and se 2 ft at 6 seconds. a chance
of tstms. showers.
.wed...sw winds 25 to 30 kt, diminishing to 20 to 25 kt in the
afternoon. seas 4 to 6 ft. wave detail: sw 5 ft at 5 seconds and
se 2 ft at 9 seconds. showers likely, mainly in the morning. 
.wed night...sw winds 20 to 25 kt, becoming w 15 to 20 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 9 seconds. a chance of showers. 
.thu...nw winds around 10 kt, becoming n in the afternoon. seas
2 to 4 ft. wave detail: w 2 ft at 3 seconds and sw 2 ft at
8 seconds. a chance of showers in the morning. 
.thu night...se winds 5 to 10 kt, becoming ne after midnight.
seas 2 to 3 ft. 
.fri through sat night...ne 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 210505
cwfbox
expires:202607211800;;328538

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
104 am edt tue jul 21 2026

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


anz233-211800-
vineyard sound-
104 am edt tue jul 21 2026

...gale watch in effect from this afternoon through wednesday
evening...

.rest of tonight...s winds around 10 kt. seas around 2 ft. wave
detail: s 2 ft at 7 seconds and sw 1 foot at 3 seconds. 
.tue...s winds 10 to 15 kt, becoming se 15 to 20 kt in the
afternoon. gusts up to 25 kt. seas 2 to 3 ft. wave detail: s 3 ft
at 6 seconds and e 1 foot at 12 seconds. a chance of showers in
the afternoon. 
.tue night...s winds 20 to 25 kt with gusts up to 30 kt. seas
3 to 4 ft, building to 4 to 6 ft after midnight. wave detail: sw
4 ft at 7 seconds and se 2 ft at 7 seconds, becoming s 6 ft at
7 seconds and w 3 ft at 12 seconds. showers with a chance of
tstms in the evening, then showers after midnight. 
.wed...sw winds 20 to 25 kt with gusts up to 30 kt. seas 5 to
7 ft. wave detail: sw 7 ft at 8 seconds and s 4 ft at 7 seconds.
showers likely, mainly in the morning. 
.wed night...sw winds 15 to 20 kt with gusts up to 30 kt,
becoming w 10 to 15 kt with gusts up to 20 kt after midnight.
seas 4 to 6 ft. wave detail: sw 6 ft at 8 seconds and s 4 ft at
9 seconds. a chance of showers. 
.thu and thu night...ne winds 5 to 10 kt. seas 2 to 4 ft. wave
detail: sw 4 ft at 9 seconds and nw 2 ft at 5 seconds. 
.fri through sat night...e 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 210505
cwfbox
expires:202607211800;;328539

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
104 am edt tue jul 21 2026

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


anz234-211800-
buzzards bay-
104 am edt tue jul 21 2026

...gale watch in effect from this afternoon through wednesday
evening...

.rest of tonight...s winds around 10 kt. seas around 2 ft. wave
detail: s 2 ft at 6 seconds and sw 1 foot at 3 seconds. 
.tue...s winds 10 to 15 kt, becoming se 15 to 20 kt in the
afternoon. gusts up to 25 kt. seas 2 to 3 ft. wave detail: s 2 ft
at 3 seconds and s 2 ft at 6 seconds. a chance of showers in the
afternoon. 
.tue night...s winds 20 to 25 kt with gusts up to 30 kt. seas
3 to 5 ft. wave detail: s 5 ft at 6 seconds and se 1 foot at
12 seconds. showers with a chance of tstms in the evening, then
showers after midnight. 
.wed...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 sw 5 ft at 9 seconds.
showers likely, mainly in the morning. 
.wed night...sw winds 15 to 20 kt with gusts up to 30 kt,
becoming nw around 10 kt after midnight. seas 3 to 5 ft. wave
detail: w 5 ft at 6 seconds and s 4 ft at 9 seconds. a chance of
showers. 
.thu and thu night...n winds 5 to 10 kt. seas 2 to 3 ft. wave
detail: se 3 ft at 7 seconds and sw 3 ft at 9 seconds. 
.fri through sat night...e 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 210505
cwfbox
expires:202607211800;;328540

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
104 am edt tue jul 21 2026

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


anz235-211800-
rhode island sound-
104 am edt tue jul 21 2026

...gale watch in effect from this afternoon through wednesday
evening...

.rest of tonight...s winds around 10 kt. seas 2 to 3 ft. wave
detail: s 3 ft at 7 seconds and w 1 foot at 3 seconds. 
.tue...s winds 10 to 15 kt, becoming se 15 to 20 kt in the
afternoon. gusts up to 25 kt. seas 2 to 4 ft. wave detail: s 4 ft
at 7 seconds and e 1 foot at 12 seconds. a chance of showers in
the afternoon. 
.tue night...s winds 20 to 25 kt with gusts up to 30 kt. seas
3 to 5 ft, building to 5 to 7 ft after midnight. wave detail: s
5 ft at 7 seconds and w 2 ft at 7 seconds, becoming s 7 ft at
7 seconds and e 1 foot at 12 seconds. showers. a chance of tstms
in the evening.
.wed...sw winds 20 to 25 kt with gusts up to 30 kt. seas 5 to
8 ft. wave detail: s 8 ft at 8 seconds and se 5 ft at 9 seconds.
showers likely, mainly in the morning. 
.wed night...sw winds 15 to 20 kt, becoming nw 10 to 15 kt after
midnight. gusts up to 25 kt. seas 5 to 8 ft. wave detail: s 8 ft
at 9 seconds and se 4 ft at 9 seconds. a chance of showers. 
.thu...nw winds around 10 kt, becoming sw in the afternoon. seas
4 to 6 ft. wave detail: s 6 ft at 9 seconds and e 4 ft at
10 seconds. 
.thu night...s winds 5 to 10 kt, becoming ne after midnight. seas
3 to 4 ft. 
.fri through sat night...e 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 210505
cwfbox
expires:202607211800;;328543

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
104 am edt tue jul 21 2026

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


anz236-211800-
narragansett bay-
104 am edt tue jul 21 2026

.rest of tonight...s winds 5 to 10 kt. waves around 2 ft. 
.tue...s winds 10 to 15 kt, becoming se 15 to 20 kt in the
afternoon. gusts up to 25 kt. waves 2 to 3 ft. a chance of
showers in the afternoon. 
.tue night...s winds 15 to 20 kt with gusts up to 30 kt. waves
2 to 3 ft, building to 3 to 5 ft after midnight. showers with a
chance of tstms in the evening, then showers likely after
midnight. 
.wed...sw winds 15 to 20 kt with gusts up to 30 kt. waves 3 to
5 ft. a chance of showers. 
.wed night...sw winds 10 to 15 kt with gusts up to 25 kt,
becoming nw 5 to 10 kt after midnight. waves 2 to 4 ft. a chance
of showers in the evening. 
.thu and thu night...n winds 5 to 10 kt. waves 2 to 3 ft. 
.fri through sat night...s 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 210505
cwfbox
expires:202607211800;;328531

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
104 am edt tue jul 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-
104 am edt tue jul 21 2026

...gale watch in effect from this afternoon through wednesday
evening...

.rest of tonight...s winds around 10 kt. seas around 2 ft. wave
detail: s 2 ft at 5 seconds and e 1 foot at 12 seconds. 
.tue...s winds 10 to 15 kt, becoming se 15 to 20 kt in the
afternoon. gusts up to 25 kt. seas 2 to 3 ft. wave detail: s 3 ft
at 4 seconds and e 1 foot at 12 seconds. 
.tue night...s winds 15 to 20 kt with gusts up to 30 kt. seas
3 to 5 ft. wave detail: s 4 ft at 5 seconds and se 1 foot at
11 seconds. showers with a chance of tstms in the evening, then
showers likely after midnight. 
.wed...s winds 15 to 20 kt with gusts up to 30 kt. seas 3 to
5 ft. wave detail: s 5 ft at 6 seconds and e 2 ft at 10 seconds.
a chance of showers. 
.wed night...sw winds 15 to 20 kt with gusts up to 30 kt,
becoming w around 10 kt with gusts up to 20 kt after midnight.
seas 4 to 6 ft. wave detail: s 5 ft at 7 seconds and se 5 ft at
10 seconds. a chance of showers in the evening. 
.thu and thu night...w winds 5 to 10 kt. seas 2 to 4 ft. wave
detail: se 4 ft at 7 seconds and e 2 ft at 10 seconds. 
.fri through sat night...s winds around 5 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 210505
cwfbox
expires:202607211800;;328534

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
104 am edt tue jul 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-
104 am edt tue jul 21 2026

...gale watch in effect from this afternoon through wednesday
evening...

.rest of tonight...s winds around 10 kt. seas 2 to 3 ft. wave
detail: se 2 ft at 7 seconds and w 1 foot at 3 seconds. 
.tue...se winds 10 to 15 kt with gusts up to 25 kt. seas 2 to
3 ft. wave detail: s 2 ft at 7 seconds and se 2 ft at 8 seconds. 
.tue night...s winds 20 to 25 kt with gusts up to 35 kt. seas
3 to 5 ft, building to 5 to 7 ft after midnight. wave detail: s
4 ft at 6 seconds and se 1 foot at 11 seconds, becoming s 7 ft at
7 seconds. showers with a chance of tstms in the evening, then
showers after midnight. 
.wed...s winds 20 to 25 kt with gusts up to 35 kt. seas 6 to
9 ft. wave detail: s 8 ft at 8 seconds and se 4 ft at 9 seconds.
showers likely in the morning. a chance of showers in the
afternoon. 
.wed night...sw winds 20 to 25 kt, becoming w 15 to 20 kt after
midnight. gusts up to 30 kt. seas 6 to 9 ft, subsiding to 5 to
7 ft after midnight. wave detail: s 8 ft at 9 seconds and se 4 ft
at 10 seconds, becoming s 7 ft at 9 seconds and se 5 ft at
10 seconds. a chance of showers. 
.thu...nw winds 10 to 15 kt with gusts up to 20 kt, becoming n
5 to 10 kt in the afternoon. seas 5 to 7 ft. wave detail: s 7 ft
at 9 seconds and se 4 ft at 10 seconds. a chance of showers. 
.thu night...se winds 5 to 10 kt, becoming ne after midnight.
seas 3 to 5 ft. a chance of showers in the evening. 
.fri through sat night...e 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 210505
cwfbox
expires:202607211800;;328535

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
104 am edt tue jul 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-
104 am edt tue jul 21 2026

...gale watch in effect from this afternoon through wednesday
evening...

.rest of tonight...s winds around 10 kt. seas 2 to 3 ft. wave
detail: s 3 ft at 7 seconds and nw 1 foot at 4 seconds. 
.tue...se winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. gusts up to 25 kt. seas 2 to 4 ft. wave detail: s 3 ft
at 7 seconds and nw 1 foot at 5 seconds. a chance of showers in
the afternoon. 
.tue night...s winds 20 to 25 kt, becoming sw 25 to 30 kt after
midnight. seas 4 to 6 ft, building to 6 to 9 ft after midnight.
wave detail: s 6 ft at 7 seconds and se 3 ft at 8 seconds,
becoming s 9 ft at 8 seconds and w 3 ft at 8 seconds. showers
with a chance of tstms. 
.wed...sw winds 25 to 30 kt, diminishing to 20 to 25 kt in the
afternoon. seas 7 to 10 ft. wave detail: sw 10 ft at 8 seconds
and w 4 ft at 5 seconds. showers with a chance of tstms in the
morning, then a chance of showers in the afternoon. 
.wed night...sw winds 20 to 25 kt, becoming w 15 to 20 kt after
midnight. gusts up to 30 kt. seas 7 to 10 ft, subsiding to 5 to
8 ft after midnight. wave detail: s 9 ft at 9 seconds and se 4 ft
at 9 seconds, becoming s 8 ft at 9 seconds and w 3 ft at
5 seconds. a chance of showers in the evening. showers likely
after midnight. 
.thu...nw winds 10 to 15 kt. seas 5 to 7 ft. wave detail: s 7 ft
at 9 seconds and nw 4 ft at 4 seconds. a chance of showers. 
.thu night...e winds 5 to 10 kt, becoming ne after midnight. seas
3 to 5 ft. a chance of showers. 
.fri through sat night...ne 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.

$$