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Gray/Portland, ME Local Forecast Office

3NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]

This Afternoon
High: 59 °F
SSE 10kt
< 1ft
Tonight
Low: 45 °F
WNW 10kt
< 1ft
Monday
High: 54 °F
Light Wind
< 1ft
Monday Night
Low: 44 °F
Light Wind
< 1ft
Tuesday
High: 52 °F
Light Wind
< 1ft
Tuesday Night
Low: 43 °F
Light Wind
< 1ft
Wednesday
High: 51 °F
⇑SSE 10kt
< 1ft
Wednesday Night
Low: 46 °F
S 10kt
< 1ft
Thursday
High: 54 °F
SE 10kt
< 1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 10:57 am EDT May 10, 2026
Forecast Valid: 12pm EDT May 10, 2026-6pm EDT May 16, 2026

View Nearby Observations

Detailed Forecast

This Afternoon

SSE wind 5 to 10 kt. Scattered showers and thunderstorms after 4pm. Seas 1 ft or less.

Tonight

W wind 5 to 10 kt becoming NW after midnight. Scattered showers and thunderstorms before 7pm, then isolated showers between 7pm and 8pm. Seas 1 ft or less.

Monday

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

Monday Night

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

Wednesday

Variable winds less than 5 kt becoming SSE 5 to 10 kt in the morning. Winds could gust as high as 20 kt. A chance of showers after 3pm. Seas 1 ft or less.

Wednesday Night

S wind around 10 kt. Showers likely. Seas 1 ft or less.

Thursday

SE wind around 10 kt. Showers. 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.