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Gray/Portland, ME Local Forecast Office

3NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]

This Afternoon
High: 71 °F
Light Wind
< 1ft
Tonight
Low: 61 °F
Light Wind
< 1ft
Monday
High: 71 °F
⇑SSE 10kt
< 1ft
Monday Night
Low: 63 °F
Light Wind
< 1ft
Tuesday
High: 77 °F
S 10kt
< 1ft
Tuesday Night
Low: 67 °F
SW 10kt
< 1ft
Wednesday
High: 79 °F
WSW 10kt
< 1ft
Wednesday Night
Low: 64 °F
Light Wind
< 1ft
Thursday
High: 77 °F
S 10kt
< 1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 2:13 pm EDT Jun 29, 2025
Forecast Valid: 2pm EDT Jun 29, 2025-6pm EDT Jul 5, 2025

View Nearby Observations

Detailed Forecast

This Afternoon

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

Tonight

Variable winds 5 kt or less. Patchy fog after 2am. Seas 1 ft or less.

Monday

Variable winds less than 5 kt becoming SSE 5 to 10 kt in the afternoon. Patchy fog before 9am. Seas 1 ft or less.

Monday Night

Variable winds 5 kt or less. Patchy fog after midnight. Seas 1 ft or less.

Tuesday

S wind 5 to 10 kt, with gusts as high as 20 kt. A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Areas of fog before 8am. Seas 1 ft or less.

Tuesday Night

SW wind around 10 kt, with gusts as high as 20 kt. A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 2am. Seas 1 ft or less.

Wednesday

WSW wind around 10 kt. Mostly sunny. Seas 1 ft or less.

Wednesday Night

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

Thursday

W wind 5 to 10 kt becoming S in the afternoon. 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.