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Gray/Portland, ME Local Forecast Office

6NM SSE Portsmouth NH

Marine Point Forecast

[NOTICE]

Today
High: 77 °F
SSE 10kt
1-2ft
Tonight
Low: 67 °F
SSE 10kt
2ft
Monday
High: 75 °F
S 10kt
1-2ft
Monday Night
Low: 66 °F
Light Wind
1-2ft
Tuesday
High: 77 °F
Light Wind
1-2ft
Tuesday Night
Low: 65 °F
Light Wind
1-2ft
Wednesday
High: 77 °F
Light Wind
1ft
Wednesday Night
Low: 68 °F
Light Wind
2ft
Thursday
High: 82 °F
Light Wind
1-2ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 6:35 am EDT Aug 2, 2026
Forecast Valid: 11am EDT Aug 2, 2026-6pm EDT Aug 8, 2026

View Nearby Observations

Detailed Forecast

Today

SSE wind 5 to 10 kt. Partly sunny. Seas 1 to 2 ft.

Tonight

SSE wind 5 to 10 kt. A chance of showers and thunderstorms before 2am, then showers likely and possibly a thunderstorm between 2am and 3am, then a chance of showers and thunderstorms after 3am. Areas of fog after 2am. Seas around 2 ft.

Monday

S wind around 10 kt. Showers and thunderstorms before 4pm, then showers and possibly a thunderstorm, mainly after 4pm. Areas of fog before 9am. Seas 1 to 2 ft.

Monday Night

Variable winds 5 kt or less. Showers before midnight. Seas 1 to 2 ft.

Tuesday

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

Tuesday Night

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

Thursday

Variable winds 5 kt or less. A chance of showers. Seas 1 to 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.