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Gray/Portland, ME Local Forecast Office

3NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]

Overnight
Low: 67 °F
SSE 10kt
< 1ft
Monday
High: 72 °F
S 15kt
< 1ft
Monday Night
Low: 63 °F
SW 15kt
< 1ft
Tuesday
High: 75 °F
Light Wind
< 1ft
Tuesday Night
Low: 63 °F
Light Wind
< 1ft
Wednesday
High: 73 °F
Light Wind
< 1ft
Wednesday Night
Low: 66 °F
Light Wind
< 1ft
Thursday
High: 82 °F
Light Wind
< 1ft
Thursday Night
Low: 69 °F
Light Wind
< 1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 7:32 pm EDT Aug 2, 2026
Forecast Valid: 11pm EDT Aug 2, 2026-6pm EDT Aug 9, 2026

View Nearby Observations

Detailed Forecast

Overnight

SSE wind 5 to 10 kt. A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 3am. Areas of fog after midnight. Seas 1 ft or less.

Monday

S wind 10 to 15 kt, with gusts as high as 25 kt. Showers and possibly a thunderstorm. Patchy fog between 1pm and 2pm. Seas 1 ft or less.

Monday Night

SW wind 10 to 15 kt becoming W after midnight. Winds could gust as high as 20 kt. Showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 9pm. Seas 1 ft or less.

Tuesday

Variable winds 5 kt or less. Sunny. Seas 1 ft or less.

Tuesday Night

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

Wednesday

Variable winds 5 kt or less. Mostly sunny. Seas 1 ft or less.

Wednesday Night

Variable winds 5 kt or less. Partly cloudy. Seas 1 ft or less.

Thursday

Variable winds 5 kt or less. Mostly sunny. Seas 1 ft or less.

Thursday Night

Variable winds 5 kt or less. Partly cloudy. Seas 1 ft or less.

*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.