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Gray/Portland, ME Local Forecast Office

8NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]

Today
High: 44 °F
SSW 15kt
1-2ft
Tonight
Low: 40 °F
SSW 15kt
2-3ft
Monday
High: 52 °F
SW 15kt
2-3ft
Monday Night
Low: 46 °F
SW 15kt
2-3ft
Tuesday
High: 51 °F
SSE 15kt
2ft
Tuesday Night
Low: 44 °F
SSW 20kt
4ft
Wednesday
High: 58 °F
SW 20kt
3-4ft
Wednesday Night
Low: 36 °F
NW 15kt
2-3ft
Thursday
High: 40 °F
NNE 20kt⇓
2ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 2:27 am EDT Mar 29, 2026
Forecast Valid: 5am EDT Mar 29, 2026-6pm EDT Apr 4, 2026

View Nearby Observations

Detailed Forecast

Today

W wind 10 to 15 kt becoming SSW in the afternoon. Sunny. Seas 1 to 2 ft.

Tonight

SSW wind around 15 kt, with gusts as high as 25 kt. Increasing clouds. Seas 2 to 3 ft.

Monday

SW wind around 15 kt, with gusts as high as 25 kt. Mostly cloudy. Seas 2 to 3 ft.

Monday Night

SW wind 10 to 15 kt. Mostly cloudy. Seas 2 to 3 ft.

Tuesday

SSE wind 10 to 15 kt. A chance of rain after 7am. Seas around 2 ft.

Tuesday Night

E wind 15 to 20 kt becoming SSW after midnight. Winds could gust as high as 30 kt. A chance of rain. Seas 2 ft building to 4 ft.

Wednesday

SW wind around 20 kt, with gusts as high as 30 kt. A chance of rain. Seas 3 to 4 ft.

Wednesday Night

NW wind around 15 kt becoming N after midnight. Winds could gust as high as 25 kt. A chance of rain before 5am. Seas 2 to 3 ft.

Thursday

NNE wind 15 to 20 kt decreasing to 10 to 15 kt in the afternoon. Winds could gust as high as 25 kt. A chance of snow before 11am, then a chance of rain and snow between 11am and 2pm, then a chance of snow after 2pm. Seas around 2 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.