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Gray/Portland, ME Local Forecast Office

3NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]

Today
High: 69 °F
⇑SSE 10kt
< 1ft
Tonight
Low: 62 °F
Light Wind
< 1ft
Sunday
High: 68 °F
SE 10kt
< 1ft
Sunday Night
Low: 63 °F
S 10kt
< 1ft
Monday
High: 74 °F
Light Wind
< 1ft
Monday Night
Low: 66 °F
Light Wind
< 1ft
Tuesday
High: 81 °F
Light Wind
< 1ft
Tuesday Night
Low: 67 °F
Light Wind
< 1ft
Wednesday
High: 78 °F
Light Wind
< 1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 6:18 am EDT Jul 12, 2025
Forecast Valid: 6am EDT Jul 12, 2025-6pm EDT Jul 18, 2025

View Nearby Observations

Detailed Forecast

Today

Variable winds less than 5 kt becoming SSE 5 to 10 kt in the morning. A slight chance of showers and thunderstorms between 4pm and 5pm. Areas of fog before 10am. Seas 1 ft or less.

Tonight

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

Sunday

SE wind 5 to 10 kt. Patchy fog before 8am. Seas 1 ft or less.

Sunday Night

S wind 5 to 10 kt. Patchy fog after 1am. Seas 1 ft or less.

Monday

Variable winds 5 kt or less. A chance of showers and thunderstorms after 2pm. Patchy fog before 7am. Seas 1 ft or less.

Monday Night

Variable winds 5 kt or less. A chance of showers and thunderstorms before 8pm. Seas 1 ft or less.

Tuesday

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

Tuesday Night

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

Wednesday

Variable winds 5 kt or less. Mostly 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.