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Gray/Portland, ME Local Forecast Office

8NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]

Today
High: 41 °F
ENE 15kt⇓
2ft
Tonight
Low: 40 °F
⇑SSW 20kt
2-3ft
Thursday
High: 45 °F
W 20kt
3ft
Thursday Night
Low: 32 °F
WNW 20kt
3ft
Friday
High: 41 °F
SSW 15kt
2-3ft
Friday Night
Low: 38 °F
S 25kt
4-5ft
Saturday
High: 43 °F
W 25kt
4-5ft
Saturday Night
Low: 32 °F
WNW 20kt
2-3ft
Sunday
High: 42 °F
SSE 10kt
1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 8:25 am EDT Mar 11, 2026
Forecast Valid: 10am EDT Mar 11, 2026-6pm EDT Mar 17, 2026

View Nearby Observations

Detailed Forecast

Today

ENE wind 12 to 15 kt decreasing to 10 to 13 kt in the afternoon. Winds could gust as high as 25 kt. A chance of showers, mainly after 2pm. Areas of dense fog after 1pm. Seas around 2 ft.

Tonight

SSE wind 10 to 15 kt becoming SSW 15 to 20 kt after midnight. Winds could gust as high as 30 kt. A chance of showers before 11pm, then a chance of showers and thunderstorms between 11pm and 2am, then a chance of showers after 2am. Areas of dense fog. Seas 2 to 3 ft.

Thursday

W wind around 20 kt, with gusts as high as 30 kt. A chance of rain. Patchy fog before 10am. Seas around 3 ft.

Thursday Night

WNW wind around 20 kt, with gusts as high as 30 kt. A chance of snow before 8pm. Seas around 3 ft.

Friday

W wind 10 to 15 kt becoming SSW in the afternoon. Winds could gust as high as 25 kt. Mostly sunny. Seas 2 to 3 ft.

Friday Night

S wind 20 to 25 kt, with gusts as high as 35 kt. A chance of rain. Seas 4 to 5 ft.

Saturday

W wind around 25 kt, with gusts as high as 35 kt. Partly sunny. Seas 4 to 5 ft.

Saturday Night

WNW wind 15 to 20 kt, with gusts as high as 30 kt. Partly cloudy. Seas 2 to 3 ft.

Sunday

WNW wind around 10 kt becoming SE in the afternoon. Mostly cloudy. Seas around 1 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.