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Gray/Portland, ME Local Forecast Office

8NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]

Today
High: 38 °F
W 25kt⇓
2-3ft
Tonight
Low: 35 °F
WSW 15kt
2ft
Tuesday
High: 42 °F
WSW 15kt
1-2ft
Tuesday Night
Low: 40 °F
SSW 20kt
3ft
Wednesday
High: 45 °F
SSW 15kt⇓
2-3ft
Wednesday Night
Low: 38 °F
SSW 10kt
1-2ft
Thursday
High: 41 °F
⇑NNW 15kt
1-2ft
Thursday Night
Low: 24 °F
⇑N 25kt
2-3ft
Friday
High: 31 °F
N 25kt⇓
3-4ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 6:44 am EST Jan 12, 2026
Forecast Valid: 7am EST Jan 12, 2026-6pm EST Jan 18, 2026

View Nearby Observations

Detailed Forecast

Today

W wind 20 to 25 kt decreasing to 15 to 20 kt in the afternoon. Winds could gust as high as 35 kt. Mostly sunny. Seas 2 to 3 ft.

Tonight

WSW wind around 15 kt, with gusts as high as 25 kt. Partly cloudy. Seas around 2 ft.

Tuesday

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

Tuesday Night

SSW wind 15 to 20 kt. Mostly cloudy. Seas 1 ft building to 3 ft.

Wednesday

SSW wind 12 to 15 kt decreasing to 10 to 13 kt in the afternoon. Cloudy. Seas 2 to 3 ft.

Wednesday Night

SSW wind 5 to 10 kt becoming WNW after midnight. A chance of showers after 8pm. Seas 1 to 2 ft.

Thursday

NNW wind 5 to 10 kt increasing to 10 to 15 kt in the afternoon. A chance of rain. Seas 1 to 2 ft.

Thursday Night

N wind 15 to 20 kt increasing to 20 to 25 kt after midnight. A chance of rain before 7pm, then a chance of rain and snow between 7pm and 11pm, then snow likely after 11pm. Seas 2 to 3 ft.

Friday

N wind 20 to 25 kt becoming NW 15 to 20 kt in the afternoon. A chance of snow. Seas 3 to 4 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.