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Gray/Portland, ME Local Forecast Office

9NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]

Today
High: 73 °F
Light Wind
1ft
Tonight
Low: 66 °F
S 10kt
1ft
Wednesday
High: 76 °F
⇑SSE 10kt
1ft
Wednesday Night
Low: 69 °F
SSW 10kt
1-2ft
Thursday
High: 77 °F
S 10kt
1ft
Thursday Night
Low: 70 °F
SSW 10kt
2ft
Friday
High: 77 °F
W 10kt
1-2ft
Friday Night
Low: 64 °F
Light Wind
1ft
Saturday
High: 72 °F
Light Wind
1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 8:18 am EDT Jul 15, 2025
Forecast Valid: 8am EDT Jul 15, 2025-6pm EDT Jul 21, 2025

View Nearby Observations

Detailed Forecast

Today

Variable winds 5 kt or less. Patchy fog before 9am. Seas around 1 ft.

Tonight

S wind 5 to 10 kt. Partly cloudy. Seas around 1 ft.

Wednesday

SW wind 5 to 8 kt becoming SSE 7 to 10 kt in the afternoon. Mostly sunny. Seas around 1 ft.

Wednesday Night

SSW wind around 10 kt. Patchy fog. Seas 1 to 2 ft.

Thursday

S wind around 10 kt. A chance of showers between 8am and 11am, then a chance of showers and thunderstorms after 11am. Patchy fog before 9am. Seas around 1 ft.

Thursday Night

SSW wind around 10 kt becoming WSW after midnight. Scattered thunderstorms before 8pm. Patchy fog. Seas around 2 ft.

Friday

W wind 5 to 10 kt becoming N in the afternoon. Patchy fog before 9am. Seas 1 to 2 ft.

Friday Night

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

Saturday

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