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Gray/Portland, ME Local Forecast Office

8NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]

Thursday
High: 36 °F
⇑ENE 20kt
2ft
Thursday Night
Low: 31 °F
ENE 20kt
2-3ft
Friday
High: 37 °F
ENE 20kt
3ft
Friday Night
Low: 37 °F
ENE 10kt
3ft
Saturday
High: 45 °F
⇑SSW 15kt
2-3ft
Saturday Night
Low: 45 °F
SW 20kt
4ft
Sunday
High: 49 °F
W 15kt
2-3ft
Sunday Night
Low: 40 °F
WSW 15kt
2ft
Monday
High: 51 °F
SSW 15kt
2ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 1:28 am EST Mar 5, 2026
Forecast Valid: 1am EST Mar 5, 2026-6pm EDT Mar 11, 2026

View Nearby Observations

Detailed Forecast

Thursday

N wind 10 to 15 kt becoming ENE 15 to 20 kt. Winds could gust as high as 30 kt. A slight chance of snow after 4pm. Seas around 2 ft.

Thursday Night

ENE wind around 20 kt, with gusts as high as 30 kt. Snow, possibly mixed with sleet before 3am, then snow between 3am and 4am, then snow, possibly mixed with sleet after 4am. Seas 2 to 3 ft.

Friday

ENE wind 15 to 20 kt, with gusts as high as 30 kt. Snow before 4pm, then a slight chance of rain. Seas around 3 ft.

Friday Night

ENE wind 5 to 10 kt becoming SSE after midnight. Cloudy. Seas around 3 ft.

Saturday

SSW wind 5 to 10 kt increasing to 10 to 15 kt in the afternoon. Winds could gust as high as 25 kt. Cloudy. Seas 2 to 3 ft.

Saturday Night

SW wind 15 to 20 kt, with gusts as high as 30 kt. A chance of rain after 8pm. Seas around 4 ft.

Sunday

W wind 10 to 15 kt. Partly sunny. Seas 2 to 3 ft.

Sunday Night

WSW wind 10 to 15 kt. Mostly clear. Seas around 2 ft.

Monday

SSW wind around 15 kt. Sunny. Seas around 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.