fzus51 kbox 212004
cwfbox
expires:202607220900;;367093

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

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


anz230-220900-
boston harbor-
404 pm edt tue jul 21 2026

.tonight...s winds 10 to 15 kt with gusts up to 25 kt. waves 2 to
3 ft. showers with a chance of tstms this evening, then a chance
of showers with a slight chance of tstms after midnight. patchy
fog after midnight with vsby 1 to 3 nm. 
.wed...sw winds 10 to 15 kt with gusts up to 20 kt. waves around
2 ft. a chance of showers. a chance of tstms in the afternoon.
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 w 5 to 10 kt after midnight. waves around 2 ft in the
evening, then 1 foot or less. a chance of showers in the evening.
.thu...nw winds 5 to 10 kt, becoming ne in the afternoon. waves
1 foot or less. 
.thu night...s winds 5 to 10 kt, becoming sw after midnight.
waves 1 foot or less. 
.fri and fri night...sw winds 5 to 10 kt. waves 1 foot or less. 
.sat through sun 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 212004
cwfbox
expires:202607220900;;367082

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

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


anz250-220900-
coastal waters east of ipswich bay and the stellwagen bank
national marine sanctuary-
404 pm edt tue jul 21 2026

...small craft advisory in effect from 8 pm edt this evening
through wednesday evening...

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

$$