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Gray/Portland, ME Local Forecast Office

3NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]

Tonight
Low: 63 °F
SSE 10kt
< 1ft
Thursday
High: 70 °F
SSE 10kt⇓
< 1ft
Thursday Night
Low: 64 °F
Light Wind
< 1ft
Friday
High: 74 °F
Light Wind
< 1ft
Friday Night
Low: 63 °F
Light Wind
< 1ft
Saturday
High: 67 °F
NE 10kt
< 1ft
Saturday Night
Low: 58 °F
Light Wind
< 1ft
Sunday
High: 69 °F
N 10kt
< 1ft
Sunday Night
Low: 57 °F
Light Wind
< 1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 2:23 pm EDT Sep 2, 2026
Forecast Valid: 7pm EDT Sep 2, 2026-6pm EDT Sep 9, 2026

View Nearby Observations

Detailed Forecast

Tonight

ESE wind 5 to 10 kt becoming SSE in the evening. Rain, with thunderstorms also possible after 5am. Patchy fog after midnight. Seas 1 ft or less.

Thursday

SSE wind 7 to 10 kt becoming SSE 5 to 8 kt in the afternoon. Winds could gust as high as 20 kt. Rain and thunderstorms before 4pm, then a slight chance of showers and thunderstorms between 4pm and 5pm, then a slight chance of thunderstorms after 5pm. Patchy fog before 10am. Seas 1 ft or less.

Thursday Night

Variable winds 5 kt or less. A slight chance of showers between 8pm and 10pm. 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

NE wind 5 to 10 kt. A chance of showers after 5pm. Seas 1 ft or less.

Saturday Night

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

Sunday

N wind 5 to 10 kt becoming NE in the afternoon. Sunny. Seas 1 ft or less.

Sunday Night

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

Winds and seas higher in and near tstms.

*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.