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Gray/Portland, ME Local Forecast Office

3NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]

This Afternoon
High: 56 °F
SE 10kt
< 1ft
Tonight
Low: 48 °F
SE 10kt
< 1ft
Wednesday
High: 55 °F
E 10kt
< 1ft
Wednesday Night
Low: 47 °F
Light Wind
< 1ft
Thursday
High: 57 °F
Light Wind
< 1ft
Thursday Night
Low: 49 °F
Light Wind
< 1ft
Friday
High: 58 °F
E 10kt
< 1ft
Friday Night
Low: 44 °F
Light Wind
< 1ft
Saturday
High: 49 °F
ENE 10kt
< 1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 6:43 am EDT Apr 14, 2026
Forecast Valid: 12pm EDT Apr 14, 2026-6pm EDT Apr 20, 2026

View Nearby Observations

Detailed Forecast

This Afternoon

SE wind 5 to 10 kt. A slight chance of showers between 4pm and 5pm, then a chance of showers and thunderstorms after 5pm. Seas 1 ft or less.

Tonight

SE wind around 10 kt becoming NW after midnight. A chance of showers and thunderstorms, mainly before 9pm. Patchy fog between 9pm and 1am. Seas 1 ft or less.

Wednesday

NE wind 5 to 10 kt becoming E in the morning. A chance of showers, mainly after 1pm. Seas 1 ft or less.

Wednesday Night

Variable winds 5 kt or less. Showers likely, mainly between 10pm and midnight. Seas 1 ft or less.

Thursday

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

Thursday Night

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

Friday

NNW wind 5 to 10 kt becoming E in the afternoon. Showers likely, mainly after 5pm. Seas 1 ft or less.

Friday Night

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

Saturday

ENE wind around 10 kt. Mostly cloudy. 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.