Port Update
Boston, MA
October 23, 2025
Notices
BOSTON Harbor is at MARSEC Level 1
BOSTON CBP has noted the following:
Crew changes are being permitted. Offsigner flights need to be vetted by CBP in advance.
Shore leave is permitted.
Tides / Currents
Weather / Marine Zone Forecast
Current weather
Partly sunny, 49° F
Feels Like 43° F
Today’s High 61° F
Wind, SSW 10 mph
Humidity 65%
Visibility 10.0 mi
Pressure 29.83 in
Partly sunny and cooler.
Synopsis for Massachusetts and Rhode Island coastal waters:
Gusty SW winds will result in one more day of choppy seas today.
Winds and seas diminish Fri into the weekend. Winds will shift to
the W and then a NW direction as high pres noses down from Quebec.
This high pres system shifting further east into Quebec will result
in winds becoming NE and also see speeds and seas increase given
stronger pressure gradient. Winds and seas may increase further by
mid to late next week with the potential for a coastal storm..
Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary:
...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING...
.TODAY...SW winds around 15 kt with gusts up to 25 kt. Seas 3 to
4 ft. Wave Detail: SW 3 ft at 4 seconds and SE 2 ft at 7 seconds.
Isolated showers this afternoon.
.TONIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to
4 ft. Wave Detail: S 3 ft at 5 seconds and E 2 ft at 10 seconds.
.FRI...W winds around 10 kt, diminishing to around 5 kt in the
afternoon. Seas 2 to 3 ft. Wave Detail: W 2 ft at 3 seconds and
SE 2 ft at 9 seconds.
.FRI NIGHT...W winds 5 to 10 kt, becoming NW 10 to 15 kt after
midnight. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 3 seconds and
SE 2 ft at 9 seconds.
.SAT AND SAT NIGHT...N winds 10 to 15 kt. Seas 2 to 3 ft. Wave
Detail: N 2 ft at 4 seconds and SE 2 ft at 8 seconds.
.SUN...N winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N 2 ft
at 4 seconds and SE 1 foot at 8 seconds.
.SUN NIGHT AND MON...N winds 10 to 15 kt with gusts up to 25 kt.
Seas 2 to 4 ft. A chance of showers.
.MON NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas
4 to 6 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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MSA Useful Links
MSA Useful Links
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Army Corp of Engineers
Boston Harbor Pilot Association, LLC
NOAA
Chart viewer - handy tool for chart reference
Weather WEB Sites
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