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Gray/Portland, ME Local Forecast Office

6NM SSE Portsmouth NH

Marine Point Forecast

[NOTICE]

Saturday
High: 23 °C
⇑SE 15km/h
< 1m
Saturday Night
Low: 18 °C
SSE 10km/h
1m
Sunday
High: 23 °C
⇑SE 15km/h
1m
Sunday Night
Low: 18 °C
S 15km/h
1m
Monday
High: 26 °C
SSE 10km/h
1m
Monday Night
Low: 19 °C
S 10km/h
1m
Tuesday
High: 29 °C
S 10km/h
1m
Tuesday Night
Low: 20 °C
S 10km/h
1m
Wednesday
High: 28 °C
⇑SE 10km/h
< 1m

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 1:43 am EDT Jul 12, 2025
Forecast Valid: 4am EDT Jul 12, 2025-6pm EDT Jul 18, 2025

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Detailed Forecast

Saturday

SE wind 5 to 10 km/h increasing to 10 to 15 km/h in the afternoon. A slight chance of showers and thunderstorms between 4pm and 5pm. Areas of dense fog before 10am. Seas 1 m or less.

Saturday Night

SSE wind around 10 km/h. Patchy fog after 3am. Seas around 1 m.

Sunday

SE wind 10 to 13 km/h increasing to 12 to 15 km/h in the afternoon. Patchy fog before 8am. Seas around 1 m.

Sunday Night

S wind 10 to 15 km/h. Patchy fog after 1am. Seas around 1 m.

Monday

SSE wind around 10 km/h. A chance of showers and thunderstorms after 2pm. Patchy fog before 7am. Seas around 1 m.

Monday Night

S wind around 10 km/h becoming SW after midnight. A chance of showers and thunderstorms before 8pm. Seas around 1 m.

Tuesday

W wind 5 to 10 km/h becoming S in the afternoon. Mostly sunny. Seas around 1 m.

Tuesday Night

S wind 5 to 10 km/h becoming W after midnight. Mostly clear. Seas around 1 m.

Wednesday

W wind 5 to 8 km/h becoming SE 7 to 10 km/h in the afternoon. Mostly sunny. Seas 1 m or less.

*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.