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Gray/Portland, ME Local Forecast Office

8NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]

Tonight
Low: 55 °F
NNW 10kt
1ft
Thursday
High: 59 °F
Light Wind
1ft
Thursday Night
Low: 52 °F
Light Wind
1ft
Friday
High: 55 °F
⇑SSE 10kt
1ft
Friday Night
Low: 50 °F
⇑S 15kt
1-2ft
Saturday
High: 52 °F
⇑NNE 25kt
2-3ft
Saturday Night
Low: 47 °F
NNE 20kt⇓
2-3ft
Sunday
High: 54 °F
N 10kt
2ft
Sunday Night
Low: 50 °F
Light Wind
2ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 2:22 pm EDT May 27, 2026
Forecast Valid: 6pm EDT May 27, 2026-6pm EDT Jun 3, 2026

View Nearby Observations

Detailed Forecast

Tonight

NNW wind 5 to 10 kt. Mostly cloudy, then gradually becoming mostly clear. Seas around 1 ft.

Thursday

Variable winds 5 kt or less. Showers likely before 2pm, then showers likely and possibly a thunderstorm between 2pm and 5pm, then scattered showers and thunderstorms after 5pm. Seas around 1 ft.

Thursday Night

Variable winds 5 kt or less. Scattered showers, mainly before 7pm. Seas around 1 ft.

Friday

NNW wind 5 to 8 kt becoming SSE 7 to 10 kt in the afternoon. A chance of showers after 4pm. Seas around 1 ft.

Friday Night

S wind 10 to 13 kt increasing to 12 to 15 kt after midnight. Winds could gust as high as 20 kt. Rain, mainly after 7pm. Seas 1 to 2 ft.

Saturday

NNE wind 15 to 20 kt increasing to 20 to 25 kt in the morning. Winds could gust as high as 35 kt. Rain, mainly before 2pm. Seas 2 to 3 ft.

Saturday Night

NNE wind 17 to 20 kt becoming NNW 15 to 18 kt after midnight. Winds could gust as high as 30 kt. A chance of showers before 11pm. Seas 2 to 3 ft.

Sunday

N wind 5 to 10 kt becoming SE in the afternoon. Mostly sunny. Seas around 2 ft.

Sunday Night

Variable winds 5 kt or less. Partly cloudy. 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.