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Gray/Portland, ME Local Forecast Office

6NM SSE Portsmouth NH

Marine Point Forecast

[NOTICE]

Tonight
Low: 37 °F
NNE 10kt
2ft
Wednesday
High: 40 °F
NE 10kt
2ft
Wednesday Night
Low: 37 °F
⇑SSW 15kt
2-3ft
Thursday
High: 51 °F
W 15kt
3-4ft
Thursday Night
Low: 30 °F
WNW 15kt
2ft
Friday
High: 42 °F
S 10kt
2ft
Friday Night
Low: 35 °F
S 15kt
3-4ft
Saturday
High: 44 °F
W 15kt
3-4ft
Saturday Night
Low: 30 °F
W 10kt
1-2ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 2:44 pm EDT Mar 10, 2026
Forecast Valid: 7pm EDT Mar 10, 2026-6pm EDT Mar 17, 2026

View Nearby Observations

Detailed Forecast

Tonight

SSW wind 5 to 10 kt becoming NNE after midnight. Partly cloudy. Seas around 2 ft.

Wednesday

NE wind around 10 kt. A slight chance of rain. Patchy dense fog after 1pm. Seas around 2 ft.

Wednesday Night

ESE wind 5 to 8 kt becoming SSW 10 to 15 kt after midnight. A chance of rain. Areas of dense fog. Seas 2 to 3 ft.

Thursday

WSW wind around 15 kt becoming W in the afternoon. Winds could gust as high as 20 kt. A chance of rain before 5pm. Patchy fog before 9am. Seas 3 to 4 ft.

Thursday Night

WNW wind 10 to 15 kt. Partly cloudy. Seas around 2 ft.

Friday

W wind around 10 kt becoming S in the afternoon. Mostly sunny. Seas around 2 ft.

Friday Night

S wind around 15 kt, with gusts as high as 20 kt. Rain and snow likely before 2am, then a chance of rain. Seas 3 to 4 ft.

Saturday

W wind around 15 kt, with gusts as high as 25 kt. A chance of rain. Seas 3 to 4 ft.

Saturday Night

W wind around 10 kt. Partly cloudy. Seas 1 to 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.