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Gray/Portland, ME Local Forecast Office

6NM SSE Portsmouth NH

Marine Point Forecast

[NOTICE]

Wednesday
High: 47 °F
Light Wind
2-3ft
Wednesday Night
Low: 30 °F
Light Wind
2-3ft
Thursday
High: 37 °F
⇑ENE 10kt
2ft
Thursday Night
Low: 33 °F
ENE 15kt
2-3ft
Friday
High: 37 °F
ENE 15kt
3-4ft
Friday Night
Low: 35 °F
Light Wind
4-5ft
Saturday
High: 50 °F
⇑SSW 10kt
5ft
Saturday Night
Low: 42 °F
SSW 15kt
5ft
Sunday
High: 50 °F
W 10kt
3-4ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 1:48 am EST Mar 4, 2026
Forecast Valid: 2am EST Mar 4, 2026-6pm EDT Mar 10, 2026

View Nearby Observations

Detailed Forecast

Wednesday

Variable winds 5 kt or less. Sunny. Seas 2 to 3 ft.

Wednesday Night

Variable winds 5 kt or less. Partly cloudy. Seas 2 to 3 ft.

Thursday

N wind 5 to 8 kt becoming ENE 7 to 10 kt in the afternoon. A slight chance of rain after 4pm. Seas around 2 ft.

Thursday Night

ENE wind around 15 kt. Rain, snow, and sleet likely before 1am, then snow and sleet likely between 1am and 2am, then rain, snow, and sleet after 2am. Seas 2 to 3 ft.

Friday

ENE wind 10 to 15 kt. Rain, snow, and sleet before noon, then a chance of rain and sleet between noon and 1pm. Seas 3 to 4 ft.

Friday Night

Variable winds 5 kt or less. Cloudy. Seas 4 to 5 ft.

Saturday

SSW wind 5 to 8 kt increasing to 7 to 10 kt in the afternoon. Mostly cloudy. Seas around 5 ft.

Saturday Night

SSW wind 10 to 15 kt becoming W after midnight. A chance of rain. Seas around 5 ft.

Sunday

W wind 5 to 10 kt. Mostly sunny. Seas 3 to 4 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.