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Gray/Portland, ME Local Forecast Office

6NM SSE Portsmouth NH

Marine Point Forecast

[NOTICE]

Tonight
Low: 45 °F
Light Wind
1ft
Friday
High: 57 °F
Light Wind
1ft
Friday Night
Low: 45 °F
Light Wind
1ft
Saturday
High: 48 °F
E 10kt
1ft
Saturday Night
Low: 44 °F
Light Wind
1-2ft
Sunday
High: 50 °F
SW 10kt
2-3ft
Sunday Night
Low: 37 °F
WNW 10kt
3ft
Monday
High: 44 °F
WNW 10kt
2-3ft
Monday Night
Low: 32 °F
NW 10kt
1-2ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 6:33 pm EDT Apr 16, 2026
Forecast Valid: 10pm EDT Apr 16, 2026-6pm EDT Apr 23, 2026

View Nearby Observations

Detailed Forecast

Tonight

Variable winds 5 kt or less. A chance of showers and thunderstorms. Patchy fog. Seas around 1 ft.

Friday

Variable winds 5 kt or less. A chance of showers, mainly between 11am and 3pm. Patchy fog before noon, then Patchy fog between 1pm and 3pm. Seas around 1 ft.

Friday Night

Variable winds 5 kt or less. A slight chance of showers before 7pm. Seas around 1 ft.

Saturday

E wind 5 to 10 kt. Mostly cloudy. Seas around 1 ft.

Saturday Night

Variable winds 5 kt or less. A chance of showers after 4am. Seas 1 to 2 ft.

Sunday

S wind 5 to 10 kt becoming WSW in the afternoon. Rain, mainly after 9am. Seas 2 to 3 ft.

Sunday Night

WNW wind around 10 kt. Rain likely, mainly before 11pm. Seas around 3 ft.

Monday

WNW wind around 10 kt. Mostly sunny. Seas 2 to 3 ft.

Monday Night

NW wind around 10 kt. Mostly clear. Seas 1 to 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.