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Gray/Portland, ME Local Forecast Office

8NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]

Tonight
Low: 64 °F
NW 10kt
1ft
Sunday
High: 70 °F
Light Wind
1ft
Sunday Night
Low: 62 °F
Light Wind
1ft
Monday
High: 67 °F
Light Wind
1ft
Monday Night
Low: 61 °F
E 10kt
1ft
Tuesday
High: 66 °F
E 15kt
1-2ft
Tuesday Night
Low: 60 °F
NNE 10kt
2-3ft
Wednesday
High: 68 °F
N 10kt
2ft
Wednesday Night
Low: 63 °F
Light Wind
2ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 2:40 pm EDT Jul 4, 2026
Forecast Valid: 6pm EDT Jul 4, 2026-6pm EDT Jul 11, 2026

View Nearby Observations

Detailed Forecast

Tonight

NW wind 5 to 10 kt becoming N after midnight. Scattered showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 10pm. Seas around 1 ft.

Sunday

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

Sunday Night

Variable winds 5 kt or less. Partly cloudy during the early evening, then becoming cloudy. Seas around 1 ft.

Monday

Variable winds 5 kt or less. Mostly cloudy. Seas around 1 ft.

Monday Night

E wind 5 to 10 kt. A chance of showers. Seas around 1 ft.

Tuesday

E wind 10 to 15 kt. Showers likely, with thunderstorms also possible after 2pm. Seas 1 to 2 ft.

Tuesday Night

NNE wind around 10 kt. A chance of showers and thunderstorms. Seas 2 to 3 ft.

Wednesday

N wind 5 to 10 kt becoming ESE in the afternoon. Mostly sunny. Seas around 2 ft.

Wednesday Night

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