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Gray/Portland, ME Local Forecast Office

6NM SSE Portsmouth NH

Marine Point Forecast

[NOTICE]

Today
High: 47 °F
⇑S 10kt
2-3ft
Tonight
Low: 38 °F
SSW 15kt⇓
3ft
Saturday
High: 46 °F
⇑NW 15kt
2-3ft
Saturday Night
Low: 35 °F
NW 10kt
2ft
Sunday
High: 42 °F
SSE 10kt
2ft
Sunday Night
Low: 32 °F
NNE 10kt
2-3ft
Monday
High: 38 °F
NNE 15kt
3ft
Monday Night
Low: 27 °F
N 10kt
3-4ft
Tuesday
High: 38 °F
NNW 10kt
4ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 2:12 am EDT Mar 20, 2026
Forecast Valid: 5am EDT Mar 20, 2026-6pm EDT Mar 26, 2026

View Nearby Observations

Detailed Forecast

Today

W wind 5 to 8 kt becoming S 7 to 10 kt in the afternoon. A slight chance of rain after 5pm. Seas 2 to 3 ft.

Tonight

SSW wind 12 to 15 kt becoming WSW 10 to 13 kt after midnight. Winds could gust as high as 20 kt. Rain likely, mainly before 1am. Seas around 3 ft.

Saturday

NW wind 10 to 13 kt increasing to 12 to 15 kt in the afternoon. Winds could gust as high as 20 kt. A slight chance of rain before 8am. Seas 2 to 3 ft.

Saturday Night

NW wind 5 to 10 kt. Increasing clouds. Seas around 2 ft.

Sunday

SSE wind 5 to 10 kt. A chance of rain before 7am, then rain and snow likely between 7am and 2pm, then rain likely after 2pm. Seas around 2 ft.

Sunday Night

NNE wind around 10 kt. Rain likely before 11pm, then rain and snow likely. Seas 2 to 3 ft.

Monday

NNE wind 10 to 15 kt. Snow likely, possibly mixed with rain before 3pm, then a chance of snow. Seas around 3 ft.

Monday Night

N wind around 10 kt. Mostly cloudy. Seas 3 to 4 ft.

Tuesday

NNW wind around 10 kt becoming W in the afternoon. Sunny. Seas around 4 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.