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Gray/Portland, ME Local Forecast Office

6NM SSE Portsmouth NH

Marine Point Forecast

[NOTICE]

Tonight
Low: 63 °F
SSW 10kt
1-2ft
Tuesday
High: 72 °F
SSE 15kt
1-2ft
Tuesday Night
Low: 65 °F
S 15kt
3ft
Wednesday
High: 78 °F
SSW 10kt
3ft
Wednesday Night
Low: 63 °F
Light Wind
3ft
Thursday
High: 75 °F
Light Wind
2ft
Thursday Night
Low: 61 °F
Light Wind
2ft
Friday
High: 73 °F
Light Wind
2ft
Friday Night
Low: 62 °F
Light Wind
2ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 6:41 pm EDT Jul 20, 2026
Forecast Valid: 8pm EDT Jul 20, 2026-6pm EDT Jul 27, 2026

View Nearby Observations

Detailed Forecast

Tonight

SSW wind around 10 kt. Partly cloudy. Seas 1 to 2 ft.

Tuesday

SSE wind 10 to 15 kt, with gusts as high as 20 kt. Increasing clouds. Seas 1 to 2 ft.

Tuesday Night

S wind 10 to 15 kt, with gusts as high as 20 kt. Showers and thunderstorms, mainly before 1am, then a chance of thunderstorms after 4am. Seas around 3 ft.

Wednesday

SSW wind 5 to 10 kt. Showers likely, with thunderstorms also possible after 5pm. Seas around 3 ft.

Wednesday Night

Variable winds 5 kt or less. Showers likely and possibly a thunderstorm before 7pm, then a chance of showers and thunderstorms between 7pm and 8pm. Seas around 3 ft.

Thursday

Variable winds 5 kt or less. Sunny. Seas around 2 ft.

Thursday Night

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

Friday

Variable winds 5 kt or less. Sunny. Seas around 2 ft.

Friday Night

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