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Gray/Portland, ME Local Forecast Office

18NM NNE Portsmouth NH

Marine Point Forecast

[NOTICE]

Today
High: 23 °C
⇑E 10km/h
< 1m
Tonight
Low: 16 °C
⇑SW 10km/h
< 1m
Sunday
High: 28 °C
W 15km/h
< 1m
Sunday Night
Low: 12 °C
N 15km/h
< 1m
Monday
High: 25 °C
N 10km/h
< 1m
Monday Night
Low: 13 °C
Light Wind
< 1m
Tuesday
High: 30 °C
SW 10km/h
< 1m
Tuesday Night
Low: 16 °C
Light Wind
< 1m
Wednesday
High: 29 °C
⇑S 10km/h
< 1m

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 6:27 am EDT Jun 6, 2026
Forecast Valid: 6am EDT Jun 6, 2026-6pm EDT Jun 12, 2026

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Detailed Forecast

Today

Variable winds less than 5 km/h becoming E 5 to 10 km/h in the morning. A slight chance of showers between 1pm and 2pm, then a slight chance of showers and thunderstorms after 2pm. Seas 1 m or less.

Tonight

NE wind 5 to 8 km/h becoming SW 7 to 10 km/h in the evening. A chance of showers and thunderstorms before 1am, then a slight chance of showers between 1am and 2am. Seas 1 m or less.

Sunday

W wind 10 to 15 km/h becoming WNW in the afternoon. A chance of showers, with thunderstorms also possible after 2pm. Seas 1 m or less.

Sunday Night

N wind 10 to 15 km/h. A chance of showers before 7pm. Seas 1 m or less.

Monday

N wind around 10 km/h becoming ENE in the afternoon. Sunny. Seas 1 m or less.

Monday Night

Variable winds 5 km/h or less. Mostly clear. Seas 1 m or less.

Tuesday

W wind 5 to 10 km/h becoming SSW in the afternoon. Sunny. Seas 1 m or less.

Tuesday Night

Variable winds 5 km/h or less. Mostly clear. Seas 1 m or less.

Wednesday

Variable winds less than 5 km/h becoming S 5 to 10 km/h in the afternoon. Sunny. Seas 1 m or less.

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.