Coastal Waters Forecast for Boston Harbor (ANZ230) (Text-Only)
NWS Forecast for: Boston Harbor (ANZ230)
Issued by: National Weather Service Norton, MA
Last Update: 704 AM EST Fri Feb 20 2026
Print


Today: SE winds 5 to 10 kt, becoming E 10 to 15 kt this afternoon. Waves 1 foot or less, then around 2 ft this afternoon. Rain and snow this afternoon.

Tonight: E winds 15 to 20 kt, becoming NE 10 to 15 kt after midnight. Waves 2 to 3 ft. Snow and rain, mainly in the evening.

Sat: N winds 10 to 15 kt with gusts up to 20 kt, becoming NE 5 to 10 kt in the afternoon. Waves around 2 ft in the morning, then 1 foot or less. A chance of snow.

Sat Night: N winds 5 to 10 kt. Waves 1 foot or less.

Sun: NE winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Waves 2 to 3 ft.

Sun Night: NE winds 20 to 25 kt, increasing to 25 to 30 kt after midnight. Waves 2 to 3 ft. At the outer harbor entrance, waves 3 to 4 ft, building to 4 to 6 ft after midnight. A chance of snow and rain in the evening, then snow likely after midnight.

Mon And Mon Night: NE winds 25 to 30 kt with gusts up to 35 kt, becoming NW 20 to 25 kt. Waves 2 to 3 ft, except 5 to 7 ft at the outer harbor entrance. A chance of snow.

Tue And Tue Night: NW winds 10 to 15 kt, becoming W 5 to 10 kt. Waves around 2 ft, then 1 foot or less. At the outer harbor entrance, waves 4 to 6 ft, subsiding to 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.







Zone Forecast: Boston Harbor (ANZ230)

Visit your local NWS office at: https://www.weather.gov/boston