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Gray/Portland, ME Local Forecast Office

6NM SSE Portsmouth NH

Marine Point Forecast

[NOTICE]

Today
High: 84 °F
Light Wind
3ft
Tonight
Low: 69 °F
Light Wind
3ft
Friday
High: 77 °F
Light Wind
2-3ft
Friday Night
Low: 67 °F
Light Wind
2ft
Saturday
High: 77 °F
Light Wind
2ft
Saturday Night
Low: 65 °F
Light Wind
1ft
Sunday
High: 77 °F
Light Wind
1ft
Sunday Night
Low: 64 °F
Light Wind
1ft
Monday
High: 80 °F
⇑S 10kt
1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 1:33 am EDT Jul 9, 2026
Forecast Valid: 10am EDT Jul 9, 2026-6pm EDT Jul 15, 2026

View Nearby Observations

Detailed Forecast

Today

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

Tonight

Variable winds 5 kt or less. A slight chance of showers and thunderstorms before midnight. Areas of fog after 5am. Seas around 3 ft.

Friday

Variable winds 5 kt or less. Showers likely and possibly a thunderstorm before 3pm, then a chance of showers and thunderstorms between 3pm and 4pm, then showers likely and possibly a thunderstorm after 4pm. Seas 2 to 3 ft.

Friday Night

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

Saturday

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

Saturday Night

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

Sunday

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

Sunday Night

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

Monday

Variable winds less than 5 kt becoming S 5 to 10 kt in the afternoon. 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.