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Gray/Portland, ME Local Forecast Office

3NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]

Wednesday
High: 54 °F
⇑SSE 10kt
< 1ft
Wednesday Night
Low: 47 °F
S 15kt
< 1ft
Thursday
High: 51 °F
SE 10kt
< 1ft
Thursday Night
Low: 46 °F
ENE 15kt
< 1ft
Friday
High: 50 °F
NE 10kt
< 1ft
Friday Night
Low: 46 °F
Light Wind
< 1ft
Saturday
High: 62 °F
SSW 10kt
< 1ft
Saturday Night
Low: 54 °F
SW 10kt
< 1ft
Sunday
High: 70 °F
W 10kt
< 1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 2:25 am EDT May 13, 2026
Forecast Valid: 3am EDT May 13, 2026-6pm EDT May 19, 2026

View Nearby Observations

Detailed Forecast

Wednesday

Variable winds less than 5 kt becoming SSE 5 to 10 kt in the morning. Winds could gust as high as 20 kt. A chance of showers, mainly before 1pm. Seas 1 ft or less.

Wednesday Night

S wind 10 to 15 kt, with gusts as high as 30 kt. Mostly cloudy. Seas 1 ft or less.

Thursday

SSE wind around 10 kt becoming E in the afternoon. Winds could gust as high as 20 kt. Rain likely, then rain and possibly a thunderstorm after 2pm. Seas 1 ft or less.

Thursday Night

ENE wind 10 to 15 kt, with gusts as high as 25 kt. Rain. Seas 1 ft or less.

Friday

NE wind 5 to 10 kt, with gusts as high as 20 kt. Rain, mainly before 1pm. Seas 1 ft or less.

Friday Night

Variable winds 5 kt or less. Patchy fog between 7pm and 8pm. 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

SW wind 5 to 10 kt. Mostly clear. Seas 1 ft or less.

Sunday

W wind 5 to 10 kt. Sunny. 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.