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Gray/Portland, ME Local Forecast Office

8NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]

Sunday
High: 49 °F
SE 15kt
2-3ft
Sunday Night
Low: 39 °F
W 15kt
3ft
Monday
High: 46 °F
W 15kt
2ft
Monday Night
Low: 36 °F
W 10kt
1-2ft
Tuesday
High: 41 °F
NE 10kt
1-2ft
Tuesday Night
Low: 30 °F
NW 15kt
2ft
Wednesday
High: 39 °F
SSE 10kt
1ft
Wednesday Night
Low: 36 °F
SSW 15kt
2-3ft
Thursday
High: 47 °F
S 20kt
2-3ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 8:13 pm EDT Apr 4, 2026
Forecast Valid: 2am EDT Apr 5, 2026-6pm EDT Apr 11, 2026

View Nearby Observations

Detailed Forecast

Sunday

SE wind 10 to 15 kt becoming SSW in the afternoon. Showers and thunderstorms. Seas 2 to 3 ft.

Sunday Night

W wind around 15 kt, with gusts as high as 25 kt. Showers likely, mainly before 8pm. Seas around 3 ft.

Monday

W wind around 15 kt, with gusts as high as 25 kt. Mostly sunny. Seas around 2 ft.

Monday Night

W wind 5 to 10 kt. Partly cloudy. Seas 1 to 2 ft.

Tuesday

NW wind around 10 kt becoming ESE in the morning. A chance of rain and snow showers before noon, then a chance of rain showers between noon and 3pm, then a chance of rain and snow showers after 3pm. Seas 1 to 2 ft.

Tuesday Night

NW wind around 15 kt, with gusts as high as 25 kt. A chance of snow showers before 8pm. Seas around 2 ft.

Wednesday

NNW wind 5 to 10 kt becoming SSE in the afternoon. Sunny. Seas around 1 ft.

Wednesday Night

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

Thursday

S wind 15 to 20 kt. Mostly sunny. Seas 2 to 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.