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Gray/Portland, ME Local Forecast Office

4NM E Portsmouth NH

Marine Point Forecast

[NOTICE]

Today
High: 75 °F
W 10kt
1ft
Tonight
Low: 52 °F
NW 10kt
1ft
Thursday
High: 57 °F
Light Wind
1ft
Thursday Night
Low: 46 °F
Light Wind
1ft
Friday
High: 56 °F
S 10kt
1ft
Friday Night
Low: 48 °F
S 10kt⇓
1ft
Saturday
High: 54 °F
Light Wind
1ft
Saturday Night
Low: 47 °F
Light Wind
1ft
Sunday
High: 52 °F
E 10kt
1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 2:33 am EDT May 20, 2026
Forecast Valid: 6am EDT May 20, 2026-6pm EDT May 26, 2026

View Nearby Observations

Detailed Forecast

Today

SW wind around 10 kt becoming W in the afternoon. Winds could gust as high as 25 kt. A chance of showers and thunderstorms, mainly between 3pm and 4pm. Seas around 1 ft.

Tonight

NW wind around 10 kt. A slight chance of showers before 7pm. Seas around 1 ft.

Thursday

Variable winds 5 kt or less. Partly sunny. Seas around 1 ft.

Thursday Night

Variable winds 5 kt or less. Mostly clear. Seas around 1 ft.

Friday

NNW wind 5 to 10 kt becoming SSE in the morning. Sunny. Seas around 1 ft.

Friday Night

S wind 5 to 10 kt becoming variable and less than 5 kt after midnight. Mostly cloudy. Seas around 1 ft.

Saturday

Variable winds 5 kt or less. Mostly cloudy. Seas around 1 ft.

Saturday Night

Variable winds 5 kt or less. Mostly cloudy. Seas around 1 ft.

Sunday

E wind 5 to 10 kt. A chance of showers. 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.