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Gray/Portland, ME Local Forecast Office

6NM SSE Portsmouth NH

Marine Point Forecast

[NOTICE]

Tonight
Low: 63 °F
S 15kt
3ft
Monday
High: 77 °F
Light Wind
2ft
Monday Night
Low: 58 °F
Light Wind
1ft
Tuesday
High: 71 °F
⇑SSE 10kt
1ft
Tuesday Night
Low: 58 °F
Light Wind
2ft
Wednesday
High: 71 °F
⇑SSE 10kt
1-2ft
Wednesday Night
Low: 59 °F
S 10kt
2ft
Thursday
High: 73 °F
⇑SSE 15kt
1-2ft
Thursday Night
Low: 63 °F
S 15kt
3ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 2:24 pm EDT Jun 14, 2026
Forecast Valid: 6pm EDT Jun 14, 2026-6pm EDT Jun 21, 2026

View Nearby Observations

Detailed Forecast

Tonight

S wind 10 to 15 kt. A chance of showers and thunderstorms before 3am, then showers and possibly a thunderstorm between 3am and 5am, then a chance of showers and thunderstorms after 5am. Seas around 3 ft.

Monday

Variable winds 5 kt or less. A chance of showers, mainly before 8am. Seas around 2 ft.

Monday Night

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

Tuesday

Variable winds less than 5 kt becoming SSE 5 to 10 kt in the afternoon. Sunny. Seas around 1 ft.

Tuesday Night

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

Wednesday

Variable winds less than 5 kt becoming SSE 5 to 10 kt in the afternoon. Mostly sunny. Seas 1 to 2 ft.

Wednesday Night

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

Thursday

SSE wind 5 to 10 kt increasing to 10 to 15 kt in the afternoon. Showers likely. Seas 1 to 2 ft.

Thursday Night

S wind 10 to 15 kt becoming WSW after midnight. Showers likely. Seas around 3 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.