Chart / Forecasts

Boston Harbor

ANZ230 · Coastal Waters Forecast · National Weather Service Boston/Norton MA · Issued 404 PM EDT Sat Oct 3 2026
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Forecast
Tonight
E winds 5 to 10 kt. Waves 1 foot or less.
Sun
E winds around 10 kt. Waves around 2 ft in the morning, then 1 foot or less.
Sun Night
E winds 5 to 10 kt, becoming N after midnight. Waves 1 foot or less. A chance of showers.
Mon
W winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Waves around 2 ft.
Mon Night Through Tue Night
W winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft.
Wed Through Thu Night
SW winds 10 to 15 kt with gusts up to 20 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.
Synopsis
High pressure weakens and moves away from the region Sun with showers returning to the southern waters. Winds from the NE between 15 and 20 kt Sunday afternoon with SCA conditions possible for the outer southern waters overnight. High pres then brings blustery NW winds to the waters into early next week.
Source: National Weather Service Coastal Waters Forecast (CWF), issued 404 PM EDT Sat Oct 3 2026, valid until Sun, 04 Oct 2026 09:00 UTC. Original text · All zones