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Gray/Portland, ME Local Forecast Office

3NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]

Tonight
Low: 64 °F
SSE 10kt
< 1ft
Wednesday
High: 66 °F
E 10kt
< 1ft
Wednesday Night
Low: 60 °F
ENE 20kt
< 1ft
Thursday
High: 64 °F
NNE 15kt
< 1ft
Thursday Night
Low: 61 °F
NNE 10kt
< 1ft
Friday
High: 70 °F
Light Wind
< 1ft
Friday Night
Low: 62 °F
Light Wind
< 1ft
Saturday
High: 76 °F
Light Wind
< 1ft
Saturday Night
Low: 65 °F
Light Wind
< 1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 2:35 pm EDT Jul 28, 2026
Forecast Valid: 7pm EDT Jul 28, 2026-6pm EDT Aug 4, 2026

View Nearby Observations

Detailed Forecast

Tonight

SSE wind 5 to 10 kt, with gusts as high as 20 kt. Patchy fog after 11pm. Seas 1 ft or less.

Wednesday

SE wind around 10 kt becoming E in the afternoon. Winds could gust as high as 20 kt. A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4pm. Patchy fog before 10am. Seas 1 ft or less.

Wednesday Night

ENE wind 15 to 20 kt, with gusts as high as 30 kt. Showers and possibly a thunderstorm. Seas 1 ft or less.

Thursday

NNE wind around 15 kt, with gusts as high as 30 kt. Showers. Seas 1 ft or less.

Thursday Night

NNE wind around 10 kt. Showers likely before midnight. Seas 1 ft or less.

Friday

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

Friday Night

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

Saturday

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

Saturday 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.