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Gray/Portland, ME Local Forecast Office

8NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]

Wednesday
High: 50 °F
E 10kt
1-2ft
Wednesday Night
Low: 47 °F
Light Wind
1ft
Thursday
High: 52 °F
ESE 10kt
1ft
Thursday Night
Low: 45 °F
ESE 10kt
1-2ft
Friday
High: 53 °F
NE 10kt
1ft
Friday Night
Low: 46 °F
NE 10kt
1ft
Saturday
High: 46 °F
NE 10kt
1ft
Saturday Night
Low: 44 °F
E 10kt
1-2ft
Sunday
High: 53 °F
S 15kt
1-2ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 6:41 pm EDT Apr 14, 2026
Forecast Valid: 1am EDT Apr 15, 2026-6pm EDT Apr 21, 2026

View Nearby Observations

Detailed Forecast

Wednesday

NW wind 5 to 10 kt becoming E in the morning. A chance of showers and thunderstorms between 2pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Patchy fog before 9am. Seas 1 to 2 ft.

Wednesday Night

Variable winds 5 kt or less. A chance of showers and thunderstorms, then showers likely after 11pm. Seas around 1 ft.

Thursday

ENE wind 5 to 10 kt becoming SSE in the morning. Showers likely, with thunderstorms also possible after 5pm. Seas around 1 ft.

Thursday Night

ESE wind 5 to 10 kt becoming NW after midnight. A chance of showers. Seas 1 to 2 ft.

Friday

N wind 5 to 10 kt becoming NE in the morning. Showers likely, mainly after 5pm. Seas around 1 ft.

Friday Night

NE wind around 10 kt. A chance of showers before 3am. Seas around 1 ft.

Saturday

NE wind around 10 kt. Mostly cloudy. Seas around 1 ft.

Saturday Night

E wind 5 to 10 kt becoming SE after midnight. Mostly cloudy. Seas 1 to 2 ft.

Sunday

S wind 10 to 15 kt. A chance of showers. Seas 1 to 2 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.