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Gray/Portland, ME Local Forecast Office

5NM SSE Portsmouth NH

Marine Point Forecast

[NOTICE]

Tonight
Low: 63 °F
Light Wind
3ft
Tuesday
High: 80 °F
S 10kt
3ft
Tuesday Night
Low: 69 °F
WSW 10kt
2-3ft
Wednesday
High: 82 °F
Light Wind
2ft
Wednesday Night
Low: 66 °F
Light Wind
2ft
Thursday
High: 81 °F
Light Wind
2ft
Thursday Night
Low: 63 °F
Light Wind
2ft
Independence Day
High: 76 °F
Light Wind
1-2ft
Friday Night
Low: 61 °F
Light Wind
1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 1:57 pm EDT Jun 30, 2025
Forecast Valid: 7pm EDT Jun 30, 2025-6pm EDT Jul 7, 2025

View Nearby Observations

Detailed Forecast

Tonight

Variable winds 5 kt or less. Patchy fog between 8pm and 9pm, then Patchy fog after 10pm. Seas around 3 ft.

Tuesday

S wind 5 to 10 kt. Scattered showers and thunderstorms before 2pm, then showers likely and possibly a thunderstorm between 2pm and 3pm, then scattered showers and thunderstorms after 3pm. Some of the storms could be severe. Areas of fog before 11am. Seas around 3 ft.

Tuesday Night

WSW wind 5 to 10 kt. Scattered showers and thunderstorms before 11pm, then isolated showers. Some of the storms could be severe. Seas 2 to 3 ft.

Wednesday

Variable winds 5 kt or less. Partly sunny. Seas around 2 ft.

Wednesday Night

Variable winds 5 kt or less. Partly cloudy. Seas around 2 ft.

Thursday

Variable winds 5 kt or less. A chance of showers after 2pm. Seas around 2 ft.

Thursday Night

Variable winds 5 kt or less. A chance of showers before 8pm. Seas around 2 ft.

Independence Day

Variable winds 5 kt or less. Sunny. Seas 1 to 2 ft.

Friday Night

Variable winds 5 kt or less. Mostly clear. 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.