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Gray/Portland, ME Local Forecast Office

8NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]

Tonight
Low: 37 °F
⇑SE 20kt
3ft
Monday
High: 49 °F
SSE 25kt
4-5ft
Monday Night
Low: 43 °F
S 25kt
7ft
Tuesday
High: 45 °F
W 20kt
5-6ft
Tuesday Night
Low: 25 °F
W 25kt
4-5ft
Wednesday
High: 36 °F
WNW 15kt⇓
3-4ft
Wednesday Night
Low: 32 °F
SSW 15kt
3-4ft
Thursday
High: 39 °F
SSE 15kt
3ft
Thursday Night
Low: 35 °F
SSE 15kt
3ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 2:25 pm EDT Mar 15, 2026
Forecast Valid: 4pm EDT Mar 15, 2026-6pm EDT Mar 22, 2026

View Nearby Observations

Detailed Forecast

Tonight

SE wind 15 to 18 kt increasing to 17 to 20 kt after midnight. Winds could gust as high as 25 kt. A chance of rain after 5am. Seas 1 ft building to 3 ft.

Monday

SE wind around 25 kt becoming S in the afternoon. Winds could gust as high as 35 kt. Rain and possibly a thunderstorm. Seas 4 to 5 ft.

Monday Night

S wind around 25 kt, with gusts as high as 45 kt. Rain and possibly a thunderstorm. Seas 5 ft building to 7 ft.

Tuesday

W wind around 20 kt, with gusts as high as 30 kt. A chance of rain before 10am. Seas 5 to 6 ft.

Tuesday Night

W wind 20 to 25 kt, with gusts as high as 30 kt. Mostly clear. Seas 4 to 5 ft.

Wednesday

WNW wind 10 to 15 kt decreasing to 5 to 10 kt in the afternoon. Winds could gust as high as 25 kt. Sunny. Seas 3 to 4 ft.

Wednesday Night

SSW wind 10 to 15 kt. Mostly cloudy. Seas 3 to 4 ft.

Thursday

SSE wind around 15 kt, with gusts as high as 20 kt. Partly sunny. Seas around 3 ft.

Thursday Night

SSE wind around 15 kt becoming SSW after midnight. Winds could gust as high as 20 kt. Mostly cloudy. Seas around 3 ft.

*Notices:

This forecast is for a single location. For safety concerns, mariners should be aware of the weather over a larger area. Forecast information for a larger area can be found within the zone forecast and the NDFD graphics.
The forecast conditions at a particular point may not exceed the criteria of a Small Craft Advisory, Gale, Storm etc. These watches/warnings/advisories are issued for the entire zone in which the point resides and mariners should act accordingly.