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Gray/Portland, ME Local Forecast Office

8NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]

This Afternoon
High: 36 °F
Light Wind
2ft
Tonight
Low: 30 °F
NNE 15kt
2ft
M.L.King Day
High: 35 °F
⇑WSW 20kt
2-3ft
Monday Night
Low: 21 °F
WSW 25kt
3-4ft
Tuesday
High: 25 °F
W 20kt
3ft
Tuesday Night
Low: 18 °F
W 20kt
2-3ft
Wednesday
High: 34 °F
SSW 15kt
2ft
Wednesday Night
Low: 29 °F
SSW 20kt
3-4ft
Thursday
High: 40 °F
WSW 20kt
3ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 1:02 pm EST Jan 18, 2026
Forecast Valid: 3pm EST Jan 18, 2026-6pm EST Jan 25, 2026

View Nearby Observations

Detailed Forecast

This Afternoon

Variable winds 5 kt or less. A chance of rain and snow showers. Seas around 2 ft.

Tonight

NE wind 10 to 15 kt becoming N after midnight. Winds could gust as high as 20 kt. Rain and snow, becoming all snow after 11pm. Seas around 2 ft.

M.L.King Day

N wind 10 to 15 kt becoming WSW 15 to 20 kt in the afternoon. Snow likely, mainly before noon. Seas 2 to 3 ft.

Monday Night

WSW wind 20 to 25 kt, with gusts as high as 30 kt. Widespread freezing spray after 4am. Partly cloudy. Seas 3 to 4 ft.

Tuesday

W wind around 20 kt, with gusts as high as 30 kt. Widespread freezing spray. Mostly sunny. Seas around 3 ft.

Tuesday Night

W wind 15 to 20 kt, with gusts as high as 30 kt. Widespread freezing spray. Mostly clear. Seas 2 to 3 ft.

Wednesday

W wind around 15 kt becoming SSW in the afternoon. Winds could gust as high as 20 kt. Widespread freezing spray before noon. Mostly sunny. Seas around 2 ft.

Wednesday Night

SSW wind 15 to 20 kt, with gusts as high as 25 kt. A chance of snow between 10pm and 4am, then a chance of rain after 4am. Seas 3 to 4 ft.

Thursday

SSW wind 15 to 20 kt becoming WSW in the afternoon. A chance of rain before 4pm, then a chance of snow between 4pm and 5pm. Seas around 3 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.