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Gray/Portland, ME Local Forecast Office

9NM S Portsmouth NH

Marine Point Forecast

[NOTICE]

Tonight
Low: 54 °F
SE 10kt⇓
< 1ft
Tuesday
High: 64 °F
Light Wind
< 1ft
Tuesday Night
Low: 58 °F
Light Wind
< 1ft
Wednesday
High: 79 °F
Light Wind
< 1ft
Wednesday Night
Low: 65 °F
Light Wind
< 1ft
Juneteenth
High: 87 °F
S 10kt
< 1ft
Thursday Night
Low: 65 °F
W 10kt
< 1ft
Friday
High: 81 °F
W 10kt
< 1ft
Friday Night
Low: 60 °F
Light Wind
< 1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 6:17 pm EDT Jun 16, 2025
Forecast Valid: 7pm EDT Jun 16, 2025-6pm EDT Jun 23, 2025

View Nearby Observations

Detailed Forecast

Tonight

SE wind 5 to 10 kt becoming variable and less than 5 kt in the evening. A chance of showers, mainly after 5am. Areas of fog after 1am. Seas 1 ft or less.

Tuesday

Variable winds 5 kt or less. A chance of showers, mainly after 1pm. Areas of fog. Seas 1 ft or less.

Tuesday Night

Variable winds 5 kt or less. A chance of showers. Areas of fog. Seas 1 ft or less.

Wednesday

Variable winds 5 kt or less. A chance of showers before 2pm. Patchy fog before 9am. Seas 1 ft or less.

Wednesday Night

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

Juneteenth

S wind 5 to 10 kt. A chance of showers after 2pm. Patchy fog before 9am, then Patchy fog after 3pm. Seas 1 ft or less.

Thursday Night

W wind around 10 kt. A chance of showers before 2am. Patchy fog before 9pm. Seas 1 ft or less.

Friday

W wind around 10 kt, with gusts as high as 20 kt. Sunny. Seas 1 ft or less.

Friday Night

Variable winds 5 kt or less. Partly cloudy. 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.