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Gray/Portland, ME Local Forecast Office

6NM SSE Portsmouth NH

Marine Point Forecast

[NOTICE]

Today
High: 76 °F
S 15kt
2ft
Tonight
Low: 64 °F
SW 10kt
3ft
Tuesday
High: 79 °F
Light Wind
1-2ft
Tuesday Night
Low: 64 °F
Light Wind
1ft
Wednesday
High: 77 °F
Light Wind
1ft
Wednesday Night
Low: 67 °F
Light Wind
1ft
Thursday
High: 81 °F
Light Wind
1-2ft
Thursday Night
Low: 71 °F
Light Wind
1-2ft
Friday
High: 84 °F
Light Wind
1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 4:49 am EDT Aug 3, 2026
Forecast Valid: 9am EDT Aug 3, 2026-6pm EDT Aug 9, 2026

View Nearby Observations

Detailed Forecast

Today

S wind 10 to 15 kt. Showers and possibly a thunderstorm. Areas of fog. Seas around 2 ft.

Tonight

SW wind around 10 kt becoming W after midnight. Showers and thunderstorms likely before 8pm, then a chance of showers between 8pm and 9pm. Seas around 3 ft.

Tuesday

Variable winds 5 kt or less. Sunny. Seas 1 to 2 ft.

Tuesday Night

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

Wednesday

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

Wednesday Night

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

Thursday

Variable winds 5 kt or less. Mostly sunny. Seas 1 to 2 ft.

Thursday Night

Variable winds 5 kt or less. Partly cloudy. Seas 1 to 2 ft.

Friday

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