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Gray/Portland, ME Local Forecast Office

8NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]

Today
High: 59 °F
Light Wind
2ft
Tonight
Low: 49 °F
Light Wind
1-2ft
Monday
High: 53 °F
NE 15kt⇓
1-2ft
Monday Night
Low: 49 °F
Light Wind
1ft
Tuesday
High: 58 °F
S 10kt
1ft
Tuesday Night
Low: 52 °F
Light Wind
1ft
Wednesday
High: 58 °F
⇑SSE 10kt
1ft
Wednesday Night
Low: 53 °F
S 10kt
1ft
Thursday
High: 63 °F
⇑SSE 10kt
1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 2:18 am EDT May 31, 2026
Forecast Valid: 5am EDT May 31, 2026-6pm EDT Jun 6, 2026

View Nearby Observations

Detailed Forecast

Today

Variable winds 5 kt or less. Scattered showers before 2pm, then scattered showers and thunderstorms between 2pm and 3pm, then showers likely and possibly a thunderstorm after 3pm. Seas around 2 ft.

Tonight

Variable winds 5 kt or less. Showers likely, mainly before 3am. Seas 1 to 2 ft.

Monday

NE wind 10 to 15 kt becoming ENE 5 to 8 kt in the afternoon. Scattered showers, mainly before 8am. Seas 1 to 2 ft.

Monday Night

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

Tuesday

WSW wind 5 to 10 kt becoming S in the afternoon. Mostly sunny. Seas around 1 ft.

Tuesday Night

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

Wednesday

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

Wednesday Night

S wind 5 to 10 kt becoming SW after midnight. Mostly clear. Seas around 1 ft.

Thursday

SW wind 5 to 8 kt becoming SSE 7 to 10 kt in the afternoon. Sunny. Seas around 1 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.