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Gray/Portland, ME Local Forecast Office

8NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]

Tonight
Low: 63 °F
Light Wind
1ft
Sunday
High: 72 °F
⇑SSE 15kt
1-2ft
Sunday Night
Low: 61 °F
S 15kt
3ft
Monday
High: 69 °F
WSW 10kt
2ft
Monday Night
Low: 58 °F
WNW 10kt
1-2ft
Tuesday
High: 64 °F
⇑S 10kt
1ft
Tuesday Night
Low: 58 °F
S 10kt
2ft
Wednesday
High: 65 °F
⇑SSE 10kt
1-2ft
Wednesday Night
Low: 59 °F
S 15kt⇓
2ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 2:52 pm EDT Jun 13, 2026
Forecast Valid: 4pm EDT Jun 13, 2026-6pm EDT Jun 20, 2026

View Nearby Observations

Detailed Forecast

Tonight

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

Sunday

SW wind 5 to 8 kt becoming SSE 10 to 15 kt in the afternoon. Winds could gust as high as 20 kt. Increasing clouds. Seas 1 to 2 ft.

Sunday Night

S wind around 15 kt, with gusts as high as 20 kt. A chance of showers and thunderstorms between midnight and 2am, then showers likely after 2am. Seas around 3 ft.

Monday

WSW wind 5 to 10 kt becoming WNW in the morning. A chance of showers before 7am. Seas around 2 ft.

Monday Night

WNW wind 5 to 10 kt. Partly cloudy. Seas 1 to 2 ft.

Tuesday

W wind 5 to 8 kt becoming S 7 to 10 kt in the afternoon. Sunny. Seas around 1 ft.

Tuesday Night

S wind 5 to 10 kt. Partly cloudy. Seas around 2 ft.

Wednesday

SSW wind 5 to 8 kt becoming SSE 7 to 10 kt in the afternoon. Mostly sunny. Seas 1 to 2 ft.

Wednesday Night

S wind 10 to 15 kt decreasing to 5 to 10 kt after midnight. Mostly cloudy. Seas around 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.