fzus51 kbox 212305
cwfbox
expires:202607221200;;375614

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

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


anz235-221200-
rhode island sound-
704 pm edt tue jul 21 2026

...small craft advisory in effect through wednesday evening...

.tonight...s winds 20 to 25 kt with gusts up to 30 kt. seas 4 to
6 ft, building to 5 to 8 ft after midnight. wave detail: s 6 ft
at 7 seconds, becoming sw 8 ft at 7 seconds and se 4 ft at
8 seconds. showers with a chance of tstms. patchy fog after
midnight. 
.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 4 ft at 7 seconds.
a chance of showers. patchy fog in the morning with vsby 1 to
3 nm. 
.wed night...sw winds 15 to 20 kt with gusts up to 25 kt,
becoming nw around 10 kt after midnight. seas 5 to 7 ft. wave
detail: s 7 ft at 9 seconds and se 4 ft at 9 seconds. a chance of
showers. patchy fog in the evening with vsby 1 to 3 nm. 
.thu...n winds 5 to 10 kt, becoming e in the afternoon. seas 4 to
6 ft. wave detail: s 6 ft at 9 seconds and e 4 ft at 10 seconds.
a chance of showers in the morning. 
.thu night...s winds 5 to 10 kt, becoming nw after midnight. seas
3 to 4 ft. wave detail: s 4 ft at 8 seconds and se 3 ft at
7 seconds. 
.fri and fri night...e winds 5 to 10 kt. seas 2 to 4 ft. wave
detail: se 4 ft at 7 seconds and w 1 foot at 7 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 212305
cwfbox
expires:202607221200;;375617

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

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


anz236-221200-
narragansett bay-
704 pm edt tue jul 21 2026

.tonight...s winds 15 to 20 kt with gusts up to 25 kt. waves 3 to
5 ft. a chance of tstms. showers this evening, then a chance of
showers after midnight. patchy fog after midnight. 
.wed...sw winds 15 to 20 kt with gusts up to 25 kt. waves 3 to
5 ft. a chance of showers. patchy fog in the morning with vsby
1 to 3 nm. 
.wed night...sw winds 10 to 15 kt with gusts up to 20 kt,
becoming nw 5 to 10 kt after midnight. waves 2 to 4 ft. a chance
of showers in the evening. 
.thu...n winds 5 to 10 kt, becoming ne in the afternoon. waves
2 to 3 ft. 
.thu night...s winds 5 to 10 kt, becoming nw after midnight.
waves 2 to 3 ft. 
.fri and fri night...ne winds 5 to 10 kt. waves around 2 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 212305
cwfbox
expires:202607221200;;375615

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

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


anz237-221200-
block island sound-
704 pm edt tue jul 21 2026

...small craft advisory in effect through wednesday evening...

.tonight...s winds 15 to 20 kt with gusts up to 30 kt. seas 5 to
7 ft. wave detail: se 6 ft at 6 seconds and w 2 ft at 5 seconds.
showers with a chance of tstms. patchy fog after midnight with
vsby 1 to 3 nm. 
.wed...sw winds 15 to 20 kt with gusts up to 30 kt. seas 5 to
7 ft. wave detail: s 6 ft at 8 seconds and w 2 ft at 5 seconds. a
chance of showers. patchy fog in the morning with vsby 1 to 3 nm.
.wed night...sw winds 10 to 15 kt with gusts up to 25 kt,
becoming nw 5 to 10 kt after midnight. seas 4 to 6 ft. wave
detail: s 6 ft at 9 seconds and e 3 ft at 10 seconds. a chance of
showers. 
.thu...n winds 5 to 10 kt, becoming se in the afternoon. seas
3 to 5 ft. wave detail: s 5 ft at 9 seconds and nw 1 foot at
7 seconds. a chance of showers in the morning. 
.thu night...s winds around 5 kt, becoming n after midnight. seas
3 to 4 ft. wave detail: s 4 ft at 8 seconds and w 1 foot at
8 seconds. 
.fri and fri night...e winds 5 to 10 kt. seas 2 to 4 ft. wave
detail: se 3 ft at 7 seconds and sw 1 foot at 4 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 212305
cwfbox
expires:202607221200;;375609

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

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


anz255-221200-
coastal waters extending out to 25 nm south of marthas vineyard
and nantucket-
704 pm edt tue jul 21 2026

...small craft advisory in effect through wednesday evening...

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

$$