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(1/2)
Latest Coastal Waters Forecast by KBOX
Issued 7/21/2026 7:04 AM America/New_York.
Valid through 7/21/2026 8:00 PM America/New_York.
fzus51 kbox 211104
cwfbox
expires:202607220000;;345203
coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
704 am edt tue jul 21 2026
coastal waters from the merrimack river ma to watch hill ri out
to 60 nm
anz230-220000-
boston harbor-
704 am edt tue jul 21 2026
.today...s winds 10 to 15 kt. gusts up to 20 kt this afternoon.
waves 2 to 3 ft. a slight chance of showers this afternoon.
.tonight...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...nw winds 5 to 10 kt, becoming s in the afternoon. waves
1 foot or less.
.thu night...s winds 5 to 10 kt, becoming w after midnight. waves
1 foot or less.
.fri through sat night...e 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.
$$
(2/2)
Latest Coastal Waters Forecast by KBOX
Issued 7/21/2026 7:04 AM America/New_York.
Valid through 7/21/2026 8:00 PM America/New_York.
fzus51 kbox 211104
cwfbox
expires:202607220000;;345192
coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
704 am edt tue jul 21 2026
coastal waters from the merrimack river ma to watch hill ri out
to 60 nm
anz250-220000-
coastal waters east of ipswich bay and the stellwagen bank
national marine sanctuary-
704 am edt tue jul 21 2026
...small craft advisory in effect from this evening through
wednesday evening...
.today...s winds 10 to 15 kt, becoming se 15 to 20 kt this
afternoon. gusts up to 25 kt. seas 2 to 3 ft. wave detail: s 3 ft
at 4 seconds and se 3 ft at 7 seconds.
.tonight...s winds 15 to 20 kt with gusts up to 30 kt. seas 3 to
5 ft. wave detail: s 4 ft at 5 seconds and se 1 foot at
11 seconds. showers with a chance of tstms in the evening, then
showers likely after midnight.
.wed...s winds 15 to 20 kt with gusts up to 30 kt. seas 4 to
6 ft. wave detail: s 5 ft at 7 seconds and sw 3 ft at 4 seconds.
a chance of showers.
.wed night...sw winds 15 to 20 kt with gusts up to 30 kt,
becoming w around 10 kt with gusts up to 20 kt after midnight.
seas 4 to 6 ft. wave detail: s 5 ft at 7 seconds and se 4 ft at
8 seconds. a chance of showers in the evening.
.thu...nw winds 5 to 10 kt, becoming sw in the afternoon. seas
2 to 4 ft. wave detail: se 4 ft at 10 seconds and s 3 ft at
6 seconds.
.thu night...s winds around 5 kt, becoming w after midnight. seas
2 to 3 ft. wave detail: se 3 ft at 8 seconds and nw 1 foot at
3 seconds.
.fri through sat night...e winds around 5 kt. seas 2 to 3 ft.
winds and seas higher in and near tstms.
seas are reported as significant wave height, which is the
average of the highest third of the waves. individual wave
heights may be more than twice the significant wave height.
$$
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