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Gray/Portland, ME Local Forecast Office

10NM S Portsmouth NH

Marine Point Forecast

[NOTICE]

Tonight
Low: 68 °F
S 10kt
1-2ft
Tuesday
High: 81 °F
Light Wind
1-2ft
Tuesday Night
Low: 69 °F
Light Wind
1ft
Wednesday
High: 83 °F
SSE 10kt
1ft
Wednesday Night
Low: 72 °F
SSW 10kt
1-2ft
Thursday
High: 82 °F
S 10kt
1ft
Thursday Night
Low: 72 °F
SSW 10kt
2ft
Friday
High: 81 °F
Light Wind
1ft
Friday Night
Low: 66 °F
Light Wind
1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 1:50 pm EDT Jul 14, 2025
Forecast Valid: 6pm EDT Jul 14, 2025-6pm EDT Jul 21, 2025

View Nearby Observations

Detailed Forecast

Tonight

S wind 5 to 10 kt becoming SW after midnight. Showers and thunderstorms likely before 2am, then scattered showers. Some of the storms could produce heavy rainfall. Seas 1 to 2 ft.

Tuesday

Variable winds 5 kt or less. Isolated showers before 7am, then a slight chance of showers after 2pm. Seas 1 to 2 ft.

Tuesday Night

Variable winds 5 kt or less. Patchy fog after 5am. Seas around 1 ft.

Wednesday

SW wind 5 to 10 kt becoming SSE in the afternoon. Mostly sunny. Seas around 1 ft.

Wednesday Night

SSW wind around 10 kt. Patchy fog. Seas 1 to 2 ft.

Thursday

S wind around 10 kt. A chance of showers and thunderstorms after 2pm. Patchy fog before 10am. Seas around 1 ft.

Thursday Night

SSW wind around 10 kt becoming WSW after midnight. A chance of showers and thunderstorms before 8pm. Patchy fog. Seas around 2 ft.

Friday

Variable winds 5 kt or less. A chance of showers. Patchy fog before 10am. Seas around 1 ft.

Friday Night

Variable winds 5 kt or less. A chance of showers. Seas around 1 ft.

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.