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Gray/Portland, ME Local Forecast Office

6NM SSE Portsmouth NH

Marine Point Forecast

[NOTICE]

This Afternoon
High: 69 °F
ENE 10kt
2ft
Tonight
Low: 61 °F
Light Wind
3ft
Wednesday
High: 73 °F
Light Wind
3ft
Wednesday Night
Low: 64 °F
Light Wind
3ft
Thursday
High: 84 °F
Light Wind
3ft
Thursday Night
Low: 69 °F
SW 10kt
3ft
Friday
High: 82 °F
Light Wind
2ft
Friday Night
Low: 67 °F
Light Wind
2ft
Saturday
High: 78 °F
Light Wind
1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 6:31 am EDT Jul 7, 2026
Forecast Valid: 12pm EDT Jul 7, 2026-6pm EDT Jul 13, 2026

View Nearby Observations

Detailed Forecast

This Afternoon

ENE wind around 10 kt. Rain likely, with thunderstorms also possible after 5pm. Seas around 2 ft.

Tonight

Variable winds 5 kt or less. A chance of showers and thunderstorms. Patchy fog. Seas around 3 ft.

Wednesday

Variable winds 5 kt or less. A slight chance of showers before 7am. Patchy fog before 11am. Seas around 3 ft.

Wednesday Night

Variable winds 5 kt or less. Clear during the early evening, then becoming mostly cloudy. Seas around 3 ft.

Thursday

Variable winds 5 kt or less. Mostly sunny. Seas around 3 ft.

Thursday Night

SW wind 5 to 10 kt. Mostly cloudy. Seas around 3 ft.

Friday

Variable winds 5 kt or less. A chance of showers and thunderstorms between 2pm and 4pm, then showers likely and possibly a thunderstorm after 4pm. Seas around 2 ft.

Friday Night

Variable winds 5 kt or less. Showers and thunderstorms likely before 8pm, then a chance of showers between 8pm and 10pm. Seas around 2 ft.

Saturday

Variable winds 5 kt or less. Sunny. Seas around 1 ft.

*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.