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Gray/Portland, ME Local Forecast Office

6NM SSE Portsmouth NH

Marine Point Forecast

[NOTICE]

Today
High: 53 °F
Light Wind
1ft
Tonight
Low: 48 °F
Light Wind
1ft
Friday
High: 60 °F
Light Wind
1-2ft
Friday Night
Low: 45 °F
Light Wind
1-2ft
Saturday
High: 50 °F
Light Wind
1-2ft
Saturday Night
Low: 44 °F
Light Wind
1-2ft
Sunday
High: 51 °F
W 10kt
2ft
Sunday Night
Low: 36 °F
W 10kt
2ft
Monday
High: 44 °F
WNW 10kt
2ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 6:30 am EDT Apr 16, 2026
Forecast Valid: 6am EDT Apr 16, 2026-6pm EDT Apr 22, 2026

View Nearby Observations

Detailed Forecast

Today

Variable winds 5 kt or less. A slight chance of showers before 9am, then a slight chance of showers after 3pm. Areas of fog before 3pm. Seas around 1 ft.

Tonight

Variable winds 5 kt or less. Showers and thunderstorms likely before 11pm, then a chance of showers. Patchy fog after 11pm. Seas around 1 ft.

Friday

Variable winds 5 kt or less. A chance of showers, with thunderstorms also possible after 11am. Patchy fog before noon, then Patchy fog between 1pm and 3pm. Seas 1 to 2 ft.

Friday Night

Variable winds 5 kt or less. A chance of showers before 10pm. Seas 1 to 2 ft.

Saturday

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

Saturday Night

Variable winds 5 kt or less. A chance of showers after 5am. Seas 1 to 2 ft.

Sunday

S wind 5 to 10 kt becoming W in the afternoon. Showers likely, mainly after 9am. Seas around 2 ft.

Sunday Night

W wind around 10 kt. Showers likely. Seas around 2 ft.

Monday

WNW wind around 10 kt. Mostly sunny. Seas around 2 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.