NWS Forecast for: Boston Harbor (ANZ230) Issued by: National Weather Service Norton, MA Last Update: 405 PM EDT Sat Jun 20 2026

Small Craft Advisory Tonight: W winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Waves around 2 ft this evening, then 1 foot or less. A slight chance of showers and tstms this evening. Sun: W winds 5 to 10 kt, becoming S in the afternoon. Waves 1 foot or less. Sun Night: SW winds around 5 kt. Waves 1 foot or less. A chance of showers in the evening. Mon: W winds around 5 kt, becoming S in the afternoon. Waves 1 foot or less, then around 2 ft in the afternoon. A chance of showers in the afternoon. Mon Night: SE winds 10 to 15 kt. Waves 2 to 3 ft. Showers. Tue: N winds 10 to 15 kt, diminishing to 5 to 10 kt in the afternoon. Waves around 2 ft in the morning, then 1 foot or less. Showers in the morning. A chance of showers in the afternoon. Tue Night: NW winds around 5 kt. Waves 1 foot or less. Wed Through Thu: S winds 5 to 10 kt. Waves around 2 ft. Thu Night: S winds 5 to 10 kt. Waves 1 foot or less. A chance of showers. winds and waves higher in and near tstms. 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)

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