Coastal Waters Forecast for Massachusetts Bay and Ipswich Bay (ANZ251) (Text-Only)
NWS Forecast for: Massachusetts Bay and Ipswich Bay (ANZ251)
Issued by: National Weather Service Norton, MA
Last Update: 704 PM EDT Mon Aug 18 2025


Tonight: E winds 5 to 10 kt, becoming NE after midnight. Seas 2 to 4 ft. Wave detail: NE 4 ft at 7 seconds and SE 1 foot at 13 seconds.

Tue: E winds 5 to 10 kt. Seas 2 to 3 ft. Wave detail: NE 3 ft at 7 seconds and SE 1 foot at 11 seconds.

Tue Night: SE winds 5 to 10 kt, becoming S after midnight. Seas around 2 ft. Wave detail: E 2 ft at 6 seconds and SE 1 foot at 13 seconds.

Wed: SE winds 5 to 10 kt. Seas around 2 ft. Wave detail: E 2 ft at 7 seconds and SE 2 ft at 16 seconds. A chance of showers in the afternoon.

Wed Night: SE winds around 10 kt. Seas around 2 ft. Wave detail: SE 2 ft at 4 seconds and SE 2 ft at 17 seconds. A chance of showers in the evening.

Thu: NE winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. Wave detail: SE 3 ft at 4 seconds and S 2 ft at 16 seconds.

Thu Night: NE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft.

Fri Through Sat Night: S winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 6 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: Massachusetts Bay and Ipswich Bay (ANZ251)

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