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Gray/Portland, ME Local Forecast Office

5NM SSE Portsmouth NH

Marine Point Forecast

[NOTICE]

This Afternoon
High: 75 °F
Light Wind
1ft
Tonight
Low: 67 °F
Light Wind
2ft
Sunday
High: 87 °F
SW 10kt
2ft
Sunday Night
Low: 71 °F
SW 10kt
2-3ft
Monday
High: 86 °F
SSW 10kt
2ft
Monday Night
Low: 69 °F
SSW 10kt
2ft
Tuesday
High: 79 °F
Light Wind
2ft
Tuesday Night
Low: 67 °F
Light Wind
2ft
Wednesday
High: 74 °F
Light Wind
1-2ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 1:41 pm EDT Jul 5, 2025
Forecast Valid: 2pm EDT Jul 5, 2025-6pm EDT Jul 11, 2025

View Nearby Observations

Detailed Forecast

This Afternoon

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

Tonight

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

Sunday

SW wind 5 to 10 kt. Mostly sunny. Seas around 2 ft.

Sunday Night

SW wind around 10 kt. Mostly clear. Seas 2 to 3 ft.

Monday

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

Monday Night

SSW wind 5 to 10 kt. A chance of showers after 8pm. Seas around 2 ft.

Tuesday

Variable winds 5 kt or less. A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Seas around 2 ft.

Tuesday Night

Variable winds 5 kt or less. Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Seas around 2 ft.

Wednesday

Variable winds 5 kt or less. A chance of showers. 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.