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(1/2)
Latest Coastal Waters Forecast by KBOX
Issued 5/20/2026 4:03 PM America/New_York.
Valid through 5/21/2026 5:00 AM America/New_York.
fzus51 kbox 202003
cwfbox
expires:202605210900;;363021
coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
403 pm edt wed may 20 2026
coastal waters from the merrimack river ma to watch hill ri out
to 60 nm
anz230-210900-
boston harbor-
403 pm edt wed may 20 2026
...small craft advisory in effect until 8 pm edt this evening...
.tonight...w winds 10 to 15 kt with gusts up to 20 kt, becoming
nw after midnight. waves around 2 ft this evening, then 1 foot or
less. a slight chance of showers.
.thu...n winds 5 to 10 kt, becoming e in the afternoon. waves
1 foot or less.
.thu night...se winds 5 to 10 kt, becoming n after midnight.
waves 1 foot or less.
.fri...ne winds 5 to 10 kt, becoming se in the afternoon. waves
1 foot or less.
.fri night...s winds 5 to 10 kt, becoming w after midnight. waves
1 foot or less.
.sat...ne winds around 5 kt, becoming e in the afternoon. waves
1 foot or less.
.sat night...se winds 5 to 10 kt, increasing to 10 to 15 kt after
midnight. waves 1 foot or less, then around 2 ft after midnight.
a chance of showers in the evening, then showers likely after
midnight.
.sun...e winds 10 to 15 kt with gusts up to 20 kt. waves 2 to
3 ft. showers likely.
.sun night through mon night...w winds 10 to 15 kt with gusts up
to 20 kt. waves around 2 ft. a chance of showers.
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.
$$
(2/2)
Latest Coastal Waters Forecast by KBOX
Issued 5/20/2026 4:03 PM America/New_York.
Valid through 5/21/2026 5:00 AM America/New_York.
fzus51 kbox 202003
cwfbox
expires:202605210900;;363010
coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
403 pm edt wed may 20 2026
coastal waters from the merrimack river ma to watch hill ri out
to 60 nm
anz250-210900-
coastal waters east of ipswich bay and the stellwagen bank
national marine sanctuary-
403 pm edt wed may 20 2026
.tonight...w winds 10 to 15 kt, becoming n after midnight. gusts
up to 20 kt. seas 2 to 3 ft. wave detail: w 3 ft at 5 seconds. a
slight chance of showers.
.thu...n winds around 10 kt with gusts up to 20 kt, becoming e in
the afternoon. seas 2 to 3 ft. wave detail: n 3 ft at 5 seconds.
.thu night...s winds around 5 kt, becoming n after midnight. seas
around 2 ft. wave detail: ne 2 ft at 6 seconds.
.fri...ne winds 5 to 10 kt, becoming e in the afternoon. seas
around 2 ft. wave detail: ne 2 ft at 5 seconds and se 1 foot at
14 seconds.
.fri night...s winds 5 to 10 kt, becoming w after midnight. seas
around 2 ft. wave detail: e 2 ft at 6 seconds and se 1 foot at
14 seconds.
.sat...n winds around 5 kt, becoming e around 5 kt in the
afternoon. seas 1 foot or less. wave detail: se 1 foot at
8 seconds and se 1 foot at 11 seconds.
.sat night...se winds 5 to 10 kt, increasing to 10 to 15 kt with
gusts up to 20 kt after midnight. seas 1 foot or less, then
around 2 ft after midnight. a chance of showers.
.sun and sun night...e winds 10 to 15 kt with gusts up to 25 kt.
seas 2 to 4 ft. showers likely.
.mon and mon night...e winds 5 to 10 kt, becoming w. seas 3 to
5 ft. a chance of showers.
seas are reported as significant wave height, which is the
average of the highest third of the waves. individual wave
heights may be more than twice the significant wave height.
$$
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