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Gray/Portland, ME Local Forecast Office

6NM SSE Portsmouth NH

Marine Point Forecast

[NOTICE]

Tonight
Low: 64 °F
Light Wind
2ft
Sunday
High: 72 °F
Light Wind
2ft
Sunday Night
Low: 66 °F
Light Wind
2ft
Monday
High: 78 °F
Light Wind
2ft
Monday Night
Low: 62 °F
Light Wind
2ft
Tuesday
High: 76 °F
Light Wind
2ft
Tuesday Night
Low: 63 °F
Light Wind
1-2ft
Wednesday
High: 78 °F
Light Wind
1ft
Wednesday Night
Low: 65 °F
Light Wind
1-2ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 6:59 pm EDT Aug 22, 2026
Forecast Valid: 9pm EDT Aug 22, 2026-6pm EDT Aug 29, 2026

View Nearby Observations

Detailed Forecast

Tonight

Variable winds 5 kt or less. A chance of showers, mainly after 3am. Patchy fog after 10pm. Seas around 2 ft.

Sunday

Variable winds 5 kt or less. A chance of showers, with thunderstorms also possible after 11am. Patchy fog before 11am. Seas around 2 ft.

Sunday Night

Variable winds 5 kt or less. A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and midnight. Seas around 2 ft.

Monday

Variable winds 5 kt or less. Sunny. Seas around 2 ft.

Monday Night

Variable winds 5 kt or less. Mostly clear. Seas around 2 ft.

Tuesday

Variable winds 5 kt or less. Sunny. Seas around 2 ft.

Tuesday Night

Variable winds 5 kt or less. Mostly clear. Seas 1 to 2 ft.

Wednesday

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

Wednesday Night

Variable winds 5 kt or less. Mostly clear. Seas 1 to 2 ft.

*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.