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Gray/Portland, ME Local Forecast Office

6NM SSE Portsmouth NH

Marine Point Forecast

[NOTICE]

This Afternoon
High: 36 °F
SE 10kt
1ft
Tonight
Low: 35 °F
SSE 15kt
2ft
Monday
High: 51 °F
SE 15kt
6ft
Monday Night
Low: 40 °F
S 20kt
10ft
Tuesday
High: 45 °F
W 15kt
9ft
Tuesday Night
Low: 23 °F
W 15kt
5ft
Wednesday
High: 36 °F
W 10kt
3-4ft
Wednesday Night
Low: 29 °F
SSW 10kt
3ft
Thursday
High: 41 °F
SSE 10kt
3ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 3:09 am EDT Mar 15, 2026
Forecast Valid: 1pm EDT Mar 15, 2026-6pm EDT Mar 21, 2026

View Nearby Observations

Detailed Forecast

This Afternoon

SE wind 5 to 10 kt. Partly sunny. Seas around 1 ft.

Tonight

SSE wind around 15 kt. A chance of rain, mainly after 5am. Seas around 2 ft.

Monday

SE wind around 15 kt becoming S in the afternoon. Winds could gust as high as 25 kt. Rain, with thunderstorms also possible after 2pm. Seas 4 ft building to 6 ft.

Monday Night

S wind around 20 kt, with gusts as high as 35 kt. Rain. Seas 7 ft building to 10 ft.

Tuesday

W wind around 15 kt, with gusts as high as 30 kt. A chance of showers before 8am. Seas 9 ft subsiding to 6 ft.

Tuesday Night

W wind around 15 kt, with gusts as high as 25 kt. Mostly clear. Seas around 5 ft.

Wednesday

W wind 5 to 10 kt. Sunny. Seas 3 to 4 ft.

Wednesday Night

SSW wind around 10 kt. Mostly cloudy. Seas around 3 ft.

Thursday

SSE wind around 10 kt. Partly sunny. 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.