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Gray/Portland, ME Local Forecast Office

8NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]

Tonight
Low: 37 °F
NE 10kt
2ft
Wednesday
High: 39 °F
ENE 20kt⇓
2ft
Wednesday Night
Low: 37 °F
⇑SSW 20kt
4ft
Thursday
High: 49 °F
SW 20kt
3-4ft
Thursday Night
Low: 32 °F
WNW 20kt
3ft
Friday
High: 42 °F
S 15kt
2-3ft
Friday Night
Low: 37 °F
S 25kt
4-5ft
Saturday
High: 44 °F
W 25kt
3-4ft
Saturday Night
Low: 33 °F
W 20kt
2-3ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 2:44 pm EDT Mar 10, 2026
Forecast Valid: 4pm EDT Mar 10, 2026-6pm EDT Mar 17, 2026

View Nearby Observations

Detailed Forecast

Tonight

S wind around 10 kt becoming N after midnight. Increasing clouds. Seas around 2 ft.

Wednesday

ENE wind 15 to 20 kt decreasing to 10 to 15 kt in the afternoon. A slight chance of rain. Areas of dense fog after 1pm. Seas around 2 ft.

Wednesday Night

SE wind 10 to 15 kt becoming SSW 15 to 20 kt in the evening. Winds could gust as high as 30 kt. A chance of rain. Areas of dense fog. Seas 1 ft building to 4 ft.

Thursday

SW wind around 20 kt becoming W in the afternoon. Winds could gust as high as 30 kt. A chance of rain before 5pm. Patchy fog before 10am. Seas 3 to 4 ft.

Thursday Night

WNW wind 15 to 20 kt, with gusts as high as 25 kt. Partly cloudy. Seas around 3 ft.

Friday

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

Friday Night

S wind around 25 kt, with gusts as high as 35 kt. A chance of snow before 11pm, then a chance of rain and snow between 11pm and 2am, then a chance of rain after 2am. Seas 4 to 5 ft.

Saturday

W wind 20 to 25 kt, with gusts as high as 35 kt. A chance of rain. Seas 3 to 4 ft.

Saturday Night

W wind 15 to 20 kt, with gusts as high as 25 kt. Partly cloudy. 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.