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Gray/Portland, ME Local Forecast Office

10NM S Portsmouth NH

Marine Point Forecast

[NOTICE]

Wednesday
High: 80 °F
⇑SSE 10kt
1ft
Wednesday Night
Low: 71 °F
SSW 10kt
1-2ft
Thursday
High: 81 °F
S 10kt
1ft
Thursday Night
Low: 72 °F
SSW 10kt
1-2ft
Friday
High: 78 °F
NW 10kt
1ft
Friday Night
Low: 63 °F
Light Wind
1ft
Saturday
High: 75 °F
Light Wind
1ft
Saturday Night
Low: 65 °F
SSE 10kt
2ft
Sunday
High: 75 °F
S 10kt
1-2ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 1:36 am EDT Jul 16, 2025
Forecast Valid: 3am EDT Jul 16, 2025-6pm EDT Jul 22, 2025

View Nearby Observations

Detailed Forecast

Wednesday

Variable winds less than 5 kt becoming SSE 5 to 10 kt in the afternoon. Patchy fog before 8am. Seas around 1 ft.

Wednesday Night

SSW wind 5 to 10 kt. Increasing clouds. Seas 1 to 2 ft.

Thursday

S wind around 10 kt. Isolated showers between 9am and 11am, then scattered showers and thunderstorms after 11am. Seas around 1 ft.

Thursday Night

SSW wind around 10 kt becoming WSW after midnight. A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 9pm. Patchy fog. Seas 1 to 2 ft.

Friday

NW wind around 10 kt. Sunny. Seas around 1 ft.

Friday Night

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

Saturday

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

Saturday Night

SSE wind 5 to 10 kt becoming SSW after midnight. Mostly cloudy. Seas around 2 ft.

Sunday

SW wind 5 to 10 kt becoming S in the afternoon. A chance of showers. Seas 1 to 2 ft.

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.