fzus51 kbox 182004
cwfbox
expires:202603190900;;916357

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
404 pm edt wed mar 18 2026

coastal waters from the merrimack river ma to watch hill ri out
to 25 nm


anz230-190900-
boston harbor-
404 pm edt wed mar 18 2026

.tonight...s winds 5 to 10 kt. waves 1 foot or less. 
.thu...se winds 5 to 10 kt. waves 1 foot or less. 
.thu night...s winds around 10 kt. waves 1 foot or less. 
.fri...sw winds 5 to 10 kt, becoming s in the afternoon. waves
1 foot or less. 
.fri night and sat...sw winds 10 to 15 kt with gusts up to 20 kt.
waves around 2 ft. a chance of rain in the evening, then rain
likely through the day. a chance of rain in the afternoon. 
.sat night...sw winds 15 to 20 kt. waves around 2 ft. 
.sun and sun night...w winds 15 to 20 kt, becoming n 20 to 25 kt.
waves around 2 ft. a chance of rain. 
.mon and mon night...n winds 20 to 25 kt, diminishing to 15 to
20 kt. waves around 2 ft, except 3 to 5 ft at the outer harbor
entrance.  

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 182004
cwfbox
expires:202603190900;;916346

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
404 pm edt wed mar 18 2026

coastal waters from the merrimack river ma to watch hill ri out
to 25 nm


anz250-190900-
coastal waters east of ipswich bay and the stellwagen bank
national marine sanctuary-
404 pm edt wed mar 18 2026

...small craft advisory in effect through thursday afternoon...

.tonight...s winds 5 to 10 kt. seas 3 to 5 ft. wave detail: se
5 ft at 10 seconds and nw 2 ft at 4 seconds. 
.thu...se winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. seas 3 to 4 ft. wave detail: se 4 ft at 10 seconds and
s 2 ft at 3 seconds. 
.thu night...s winds 10 to 15 kt. seas 2 to 4 ft. wave detail: se
3 ft at 9 seconds and s 2 ft at 3 seconds. 
.fri...sw winds 5 to 10 kt. seas 2 to 4 ft. wave detail: se 3 ft
at 8 seconds and sw 2 ft at 3 seconds. 
.fri night...s winds 10 to 15 kt with gusts up to 20 kt. seas
3 to 5 ft. wave detail: e 4 ft at 9 seconds and s 3 ft at
4 seconds. rain likely after midnight. 
.sat...s winds 15 to 20 kt with gusts up to 25 kt. seas 3 to
5 ft. wave detail: s 4 ft at 4 seconds and e 4 ft at 9 seconds. a
chance of rain. 
.sat night...sw winds 15 to 20 kt with gusts up to 25 kt. seas
3 to 5 ft. 
.sun and sun night...sw winds 15 to 20 kt, becoming nw 20 to
25 kt. gusts up to 30 kt. seas 3 to 5 ft. a chance of rain. 
.mon and mon night...n winds 20 to 25 kt with gusts up to 30 kt.
seas 4 to 6 ft.  

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.

$$