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Gray/Portland, ME Local Forecast Office

3NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]

Today
High: 71 °F
Light Wind
< 1ft
Tonight
Low: 68 °F
S 15kt
< 1ft
Thursday
High: 77 °F
W 10kt
< 1ft
Thursday Night
Low: 61 °F
WNW 10kt
< 1ft
Friday
High: 69 °F
WNW 10kt
< 1ft
Friday Night
Low: 57 °F
Light Wind
< 1ft
Saturday
High: 67 °F
⇑SSE 10kt
< 1ft
Saturday Night
Low: 61 °F
Light Wind
< 1ft
Sunday
High: 74 °F
S 10kt
< 1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 6:42 am EDT Sep 9, 2026
Forecast Valid: 8am EDT Sep 9, 2026-6pm EDT Sep 15, 2026

View Nearby Observations

Detailed Forecast

Today

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

Tonight

S wind around 15 kt, with gusts as high as 30 kt. Showers and thunderstorms likely, then showers and possibly a thunderstorm after 3am. Seas 1 ft or less.

Thursday

W wind around 10 kt, with gusts as high as 20 kt. Showers, mainly before 8am. Seas 1 ft or less.

Thursday Night

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

Friday

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

Friday Night

Variable winds 5 kt or less. Clear. Seas 1 ft or less.

Saturday

Variable winds less than 5 kt becoming SSE 5 to 10 kt in the afternoon. Sunny. Seas 1 ft or less.

Saturday Night

Variable winds 5 kt or less. Partly cloudy. Seas 1 ft or less.

Sunday

S wind 5 to 10 kt. A chance of showers. 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.