fzus51 kbox 181705
cwfbox
expires:202604190600;;588957

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
104 pm edt sat apr 18 2026

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


anz230-190600-
boston harbor-
104 pm edt sat apr 18 2026

.this afternoon...ne winds around 10 kt. waves around 2 ft.
patchy fog. vsby 1 to 3 nm. 
.tonight...e winds 5 to 10 kt, becoming se after midnight. waves
1 foot or less. patchy fog. patchy drizzle after midnight. vsby
1 to 3 nm, decreasing to 1 nm or less after midnight. 
.sun...se winds 5 to 10 kt, becoming nw 15 to 20 kt with gusts up
to 25 kt in the afternoon. waves 1 foot or less, then around 2 ft
in the afternoon. patchy fog. showers. vsby 1 nm or less,
increasing to 1 to 3 nm in the afternoon. 
.sun night...nw winds 15 to 20 kt with gusts up to 25 kt,
becoming w 10 to 15 kt after midnight. waves around 2 ft. a
chance of showers in the evening. 
.mon...w winds around 10 kt. waves 1 foot or less. 
.mon night...n winds 10 to 15 kt. waves 1 foot or less, then
around 2 ft after midnight. 
.tue through wed night...w winds 10 to 15 kt. waves around 2 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.

$$

fzus51 kbox 181705
cwfbox
expires:202604190600;;588946

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
104 pm edt sat apr 18 2026

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


anz250-190600-
coastal waters east of ipswich bay and the stellwagen bank
national marine sanctuary-
104 pm edt sat apr 18 2026

.this afternoon...ne winds around 10 kt. seas 3 to 4 ft. wave
detail: e 3 ft at 7 seconds and n 1 foot at 3 seconds. patchy
fog. vsby 1 to 3 nm. 
.tonight...e winds 5 to 10 kt, becoming se after midnight. seas
3 to 4 ft. wave detail: e 4 ft at 7 seconds and n 1 foot at
3 seconds. patchy fog. patchy drizzle. vsby 1 nm or less. 
.sun...s winds 10 to 15 kt, becoming w 15 to 20 kt in the
afternoon. gusts up to 25 kt. seas 3 to 4 ft. wave detail: e 4 ft
at 8 seconds and s 1 foot at 8 seconds. patchy fog. a chance of
showers in the morning, then showers in the afternoon. vsby 1 nm
or less. 
.sun night...nw winds 15 to 20 kt, becoming w 10 to 15 kt after
midnight. gusts up to 25 kt. seas 3 to 4 ft. wave detail: se 4 ft
at 7 seconds and nw 3 ft at 4 seconds. patchy fog in the evening.
showers likely in the evening. 
.mon...w winds 10 to 15 kt, diminishing to 5 to 10 kt in the
afternoon. seas 2 to 4 ft. wave detail: w 2 ft at 4 seconds and
se 2 ft at 7 seconds. 
.mon night...n winds 10 to 15 kt. gusts up to 20 kt after
midnight. seas 2 to 3 ft. wave detail: n 3 ft at 4 seconds and e
3 ft at 8 seconds. 
.tue through wed night...w winds 15 to 20 kt. seas 2 to 4 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.

$$