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Gray/Portland, ME Local Forecast Office

6NM SSE Portsmouth NH

Marine Point Forecast

[NOTICE]

Today
High: 48 °F
⇑S 10kt
2ft
Tonight
Low: 40 °F
S 15kt
3ft
Saturday
High: 44 °F
W 10kt⇓
1-2ft
Saturday Night
Low: 38 °F
⇑E 10kt
1-2ft
Sunday
High: 41 °F
WNW 10kt
2-3ft
Sunday Night
Low: 29 °F
⇑W 20kt
2-3ft
Monday
High: 36 °F
W 15kt
2ft
Monday Night
Low: 31 °F
WSW 10kt
1-2ft
Tuesday
High: 42 °F
WSW 10kt
1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 12:33 am EST Jan 9, 2026
Forecast Valid: 5am EST Jan 9, 2026-6pm EST Jan 15, 2026

View Nearby Observations

Detailed Forecast

Today

Variable winds less than 5 kt becoming S 5 to 10 kt in the morning. A slight chance of showers after 5pm. Patchy freezing fog before 10am. Seas around 2 ft.

Tonight

S wind 10 to 15 kt becoming W after midnight. Showers likely, mainly before 10pm. Seas around 3 ft.

Saturday

W wind 7 to 10 kt becoming NNE 5 to 8 kt in the afternoon. A chance of showers, mainly after 5pm. Seas 1 to 2 ft.

Saturday Night

E wind 5 to 8 kt increasing to 7 to 10 kt after midnight. Rain, mainly after 7pm. Seas 1 to 2 ft.

Sunday

NE wind around 10 kt becoming WNW in the afternoon. Rain likely, mainly before 11am. Seas 2 to 3 ft.

Sunday Night

W wind 10 to 15 kt increasing to 15 to 20 kt after midnight. Mostly cloudy. Seas 2 to 3 ft.

Monday

W wind around 15 kt, with gusts as high as 20 kt. Mostly sunny. Seas around 2 ft.

Monday Night

WSW wind around 10 kt. Mostly cloudy. Seas 1 to 2 ft.

Tuesday

WSW wind around 10 kt. Mostly sunny. Seas around 1 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.