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Gray/Portland, ME Local Forecast Office

3NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]

Today
High: 36 °F
ENE 10kt
< 1ft
Tonight
Low: 27 °F
⇑ENE 30kt
< 1ft
Monday
High: 32 °F
NE 30kt
< 1ft
Monday Night
Low: 24 °F
N 25kt⇓
< 1ft
Tuesday
High: 31 °F
WNW 15kt
< 1ft
Tuesday Night
Low: 16 °F
WNW 10kt
< 1ft
Wednesday
High: 36 °F
S 10kt
< 1ft
Wednesday Night
Low: 29 °F
SW 10kt
< 1ft
Thursday
High: 40 °F
W 10kt
< 1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 6:26 am EST Feb 22, 2026
Forecast Valid: 7am EST Feb 22, 2026-6pm EST Feb 28, 2026

View Nearby Observations

Detailed Forecast

Today

NNE wind around 10 kt becoming ENE in the afternoon. Winds could gust as high as 20 kt. Mostly cloudy. Seas 1 ft or less.

Tonight

ENE wind 15 to 20 kt increasing to 25 to 30 kt. Winds could gust as high as 45 kt. A slight chance of snow before 11pm, then a chance of snow between 11pm and 3am, then snow likely with areas of blowing snow after 3am. Seas 1 ft or less.

Monday

NE wind around 30 kt becoming N in the afternoon. Winds could gust as high as 50 kt. Snow with widespread blowing snow. Seas 1 ft or less.

Monday Night

N wind 20 to 25 kt becoming NW 15 to 20 kt after midnight. Winds could gust as high as 40 kt. Snow likely with areas of blowing snow before midnight, then patchy blowing snow between midnight and 2am, then patchy blowing snow after 2am. Seas 1 ft or less.

Tuesday

WNW wind around 15 kt, with gusts as high as 25 kt. Patchy blowing snow between 10am and 11am. Seas 1 ft or less.

Tuesday Night

WNW wind around 10 kt becoming WSW after midnight. Winds could gust as high as 20 kt. Partly cloudy. Seas 1 ft or less.

Wednesday

SW wind 5 to 10 kt becoming S in the morning. Snow likely, mainly after 9am. Seas 1 ft or less.

Wednesday Night

SW wind 5 to 10 kt. A chance of snow. Seas 1 ft or less.

Thursday

W wind 5 to 10 kt. A chance of rain and snow between 3pm and 4pm, then a chance of snow after 4pm. Seas 1 ft or less.

*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.