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Gray/Portland, ME Local Forecast Office

3NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]

Late Afternoon
High: 52 °F
ENE 10kt
< 1ft
Tonight
Low: 46 °F
ENE 15kt
< 1ft
Friday
High: 51 °F
NE 10kt⇓
< 1ft
Friday Night
Low: 47 °F
Light Wind
< 1ft
Saturday
High: 63 °F
SW 10kt
< 1ft
Saturday Night
Low: 54 °F
SSW 10kt
< 1ft
Sunday
High: 67 °F
WSW 10kt
< 1ft
Sunday Night
Low: 51 °F
Light Wind
< 1ft
Monday
High: 62 °F
⇑Light Wind
< 1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 2:40 pm EDT May 14, 2026
Forecast Valid: 4pm EDT May 14, 2026-6pm EDT May 21, 2026

View Nearby Observations

Detailed Forecast

Late Afternoon

ENE wind around 10 kt. Rain and possibly a thunderstorm. Seas 1 ft or less.

Tonight

E wind around 15 kt becoming NE after midnight. Winds could gust as high as 25 kt. Rain and possibly a thunderstorm. Areas of fog after 7pm. Seas 1 ft or less.

Friday

NE wind 7 to 10 kt decreasing to 5 to 8 kt in the afternoon. Winds could gust as high as 20 kt. Rain, mainly before 2pm. Patchy fog before 9am. Seas 1 ft or less.

Friday Night

Variable winds 5 kt or less. Mostly cloudy, then gradually becoming mostly clear. Seas 1 ft or less.

Saturday

WSW wind 5 to 10 kt becoming SSW in the afternoon. Sunny. Seas 1 ft or less.

Saturday Night

SSW wind around 10 kt, with gusts as high as 20 kt. Partly cloudy. Seas 1 ft or less.

Sunday

WSW wind around 10 kt. Sunny. Seas 1 ft or less.

Sunday Night

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

Monday

Variable winds 5 kt or less. Mostly sunny. 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.