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Gray/Portland, ME Local Forecast Office

8NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]

Today
High: 45 °F
WSW 15kt
1-2ft
Tonight
Low: 39 °F
SSW 20kt
2-3ft
Wednesday
High: 46 °F
SSW 15kt⇓
2-3ft
Wednesday Night
Low: 37 °F
S 10kt
1-2ft
Thursday
High: 42 °F
⇑W 20kt
2ft
Thursday Night
Low: 20 °F
W 20kt
2-3ft
Friday
High: 32 °F
WNW 15kt
2-3ft
Friday Night
Low: 30 °F
SW 15kt
2ft
Saturday
High: 41 °F
SW 15kt
2ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 6:28 am EST Jan 13, 2026
Forecast Valid: 9am EST Jan 13, 2026-6pm EST Jan 19, 2026

View Nearby Observations

Detailed Forecast

Today

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

Tonight

SSW wind 15 to 20 kt, with gusts as high as 30 kt. A slight chance of showers between 10pm and 4am. Seas 2 to 3 ft.

Wednesday

SSW wind 12 to 15 kt decreasing to 10 to 13 kt in the afternoon. Winds could gust as high as 25 kt. A slight chance of showers after 5pm. Seas 2 to 3 ft.

Wednesday Night

S wind 5 to 10 kt. A chance of rain after 7pm. Seas 1 to 2 ft.

Thursday

SW wind 10 to 15 kt becoming W 15 to 20 kt in the afternoon. A chance of rain before 9am. Seas around 2 ft.

Thursday Night

W wind around 20 kt. Partly cloudy. Seas 2 to 3 ft.

Friday

WNW wind around 15 kt becoming WSW in the afternoon. Winds could gust as high as 20 kt. Sunny. Seas 2 to 3 ft.

Friday Night

SW wind around 15 kt. Mostly cloudy. Seas around 2 ft.

Saturday

SW wind 10 to 15 kt. Mostly sunny. Seas around 2 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.