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Gray/Portland, ME Local Forecast Office

6NM SSE Portsmouth NH

Marine Point Forecast

[NOTICE]

Today
High: 68 °F
Light Wind
1ft
Tonight
Low: 63 °F
Light Wind
1-2ft
Friday
High: 72 °F
Light Wind
2ft
Friday Night
Low: 52 °F
Light Wind
1-2ft
Saturday
High: 62 °F
Light Wind
1ft
Saturday Night
Low: 55 °F
Light Wind
2ft
Sunday
High: 61 °F
SSE 10kt
1-2ft
Sunday Night
Low: 54 °F
Light Wind
2ft
Monday
High: 62 °F
N 10kt
2ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 2:32 am EDT Sep 17, 2026
Forecast Valid: 5am EDT Sep 17, 2026-6pm EDT Sep 23, 2026

View Nearby Observations

Detailed Forecast

Today

Variable winds 5 kt or less. A chance of showers after 5pm. Seas around 1 ft.

Tonight

Variable winds 5 kt or less. Showers and thunderstorms before 1am, then showers likely and possibly a thunderstorm between 1am and 2am, then a chance of showers after 2am. Patchy fog. Seas 1 to 2 ft.

Friday

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

Friday Night

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

Saturday

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

Saturday Night

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

Sunday

SSE wind 5 to 10 kt. Showers likely, mainly after 2pm. Seas 1 to 2 ft.

Sunday Night

Variable winds 5 kt or less. Showers likely. Seas around 2 ft.

Monday

N wind 5 to 10 kt becoming NE in the afternoon. 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.