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Gray/Portland, ME Local Forecast Office

3NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]

Monday
High: 66 °F
Light Wind
< 1ft
Monday Night
Low: 57 °F
⇑SE 15kt
< 1ft
Tuesday
High: 67 °F
S 10kt
< 1ft
Tuesday Night
Low: 58 °F
WNW 10kt
< 1ft
Wednesday
High: 73 °F
WNW 10kt
< 1ft
Wednesday Night
Low: 59 °F
Light Wind
< 1ft
Thursday
High: 72 °F
Light Wind
< 1ft
Thursday Night
Low: 60 °F
Light Wind
< 1ft
Friday
High: 69 °F
S 10kt
< 1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 2:18 am EDT Jun 22, 2026
Forecast Valid: 2am EDT Jun 22, 2026-6pm EDT Jun 28, 2026

View Nearby Observations

Detailed Forecast

Monday

Variable winds 5 kt or less. Showers likely, mainly after 5pm. Seas 1 ft or less.

Monday Night

SE wind 5 to 8 kt becoming SE 10 to 15 kt after midnight. Winds could gust as high as 25 kt. Rain and possibly a thunderstorm before 11pm, then showers likely and possibly a thunderstorm between 11pm and 1am, then rain and possibly a thunderstorm after 1am. Patchy fog after 4am. Seas 1 ft or less.

Tuesday

S wind 5 to 10 kt becoming NNW in the morning. Showers, mainly before 1pm. Seas 1 ft or less.

Tuesday Night

WNW wind 5 to 10 kt. Partly cloudy. Seas 1 ft or less.

Wednesday

WNW wind 5 to 10 kt. Sunny. Seas 1 ft or less.

Wednesday Night

Variable winds 5 kt or less. Mostly clear. Seas 1 ft or less.

Thursday

Variable winds 5 kt or less. Mostly sunny. Seas 1 ft or less.

Thursday Night

Variable winds 5 kt or less. A chance of showers. Seas 1 ft or less.

Friday

S wind 5 to 10 kt. Showers likely, with thunderstorms also possible after 2pm. Seas 1 ft or less.

Winds and seas higher in and near tstms.

*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.