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Gray/Portland, ME Local Forecast Office

6NM SSE Portsmouth NH

Marine Point Forecast

[NOTICE]

Today
High: 56 °F
Light Wind
2ft
Tonight
Low: 39 °F
SSW 10kt⇓
2ft
Wednesday
High: 48 °F
NE 15kt
2ft
Wednesday Night
Low: 39 °F
⇑SSW 15kt
2-3ft
Thursday
High: 52 °F
W 15kt
3-4ft
Thursday Night
Low: 30 °F
WNW 15kt
2ft
Friday
High: 42 °F
S 10kt
1-2ft
Friday Night
Low: 35 °F
S 15kt
4ft
Saturday
High: 44 °F
W 15kt
3-4ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 6:45 am EDT Mar 10, 2026
Forecast Valid: 7am EDT Mar 10, 2026-6pm EDT Mar 16, 2026

View Nearby Observations

Detailed Forecast

Today

Variable winds 5 kt or less. Sunny. Seas around 2 ft.

Tonight

SSW wind 5 to 10 kt becoming variable and less than 5 kt after midnight. A slight chance of rain after 4am. Seas around 2 ft.

Wednesday

NE wind 10 to 15 kt. A chance of rain, mainly after 7am. Patchy fog after 1pm. Seas around 2 ft.

Wednesday Night

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

Thursday

SW wind around 15 kt becoming W in the afternoon. 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 5 to 10 kt becoming S in the afternoon. Mostly sunny. Seas 1 to 2 ft.

Friday Night

S wind around 15 kt, with gusts as high as 25 kt. A chance of snow between 9pm and 11pm, then a chance of rain after 11pm. Seas 2 ft building to 4 ft.

Saturday

W wind around 15 kt, with gusts as high as 25 kt. A chance of rain and snow before 9am. 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.