fzus51 kbox 210505
cwfbox
expires:202607211800;;328542

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


anz230-211800-
boston harbor-
104 am edt tue jul 21 2026

.rest of tonight...s winds 5 to 10 kt. waves 1 foot or less. 
.tue...s winds 10 to 15 kt. gusts up to 20 kt in the afternoon.
waves 2 to 3 ft. 
.tue night...s winds 15 to 20 kt with gusts up to 25 kt. waves
2 to 3 ft. showers. a chance of tstms in the evening. 
.wed...sw winds 10 to 15 kt with gusts up to 20 kt. waves around
2 ft. a chance of showers in the morning, then showers likely in
the afternoon. 
.wed night...w winds 10 to 15 kt with gusts up to 20 kt,
diminishing to 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 and thu night...w winds 5 to 10 kt. waves 1 foot or less. 
.fri through sat night...s winds 5 to 10 kt. waves 1 foot or
less.  

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.

$$