For More Weather Information:

Gray/Portland, ME Local Forecast Office

6NM SSE Portsmouth NH

Marine Point Forecast

[NOTICE]

Today
High: 48 °F
⇑SSW 10kt
2-3ft
Tonight
Low: 41 °F
SW 10kt
3ft
Tuesday
High: 58 °F
Light Wind
2ft
Tuesday Night
Low: 39 °F
Light Wind
2ft
Wednesday
High: 47 °F
E 10kt
2ft
Wednesday Night
Low: 41 °F
S 15kt
3-4ft
Thursday
High: 51 °F
W 15kt
4ft
Thursday Night
Low: 27 °F
WNW 15kt
2ft
Friday
High: 40 °F
SSW 10kt
2ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 2:40 am EDT Mar 9, 2026
Forecast Valid: 5am EDT Mar 9, 2026-6pm EDT Mar 15, 2026

View Nearby Observations

Detailed Forecast

Today

SW wind 5 to 8 kt becoming SSW 7 to 10 kt in the afternoon. Winds could gust as high as 20 kt. Mostly sunny. Seas 2 to 3 ft.

Tonight

SW wind around 10 kt. Mostly clear. Seas around 3 ft.

Tuesday

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

Tuesday Night

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

Wednesday

E wind around 10 kt. A chance of rain. Seas around 2 ft.

Wednesday Night

S wind 10 to 15 kt. Rain likely, mainly before 2am. Seas 3 to 4 ft.

Thursday

SW wind around 15 kt becoming W in the afternoon. Winds could gust as high as 20 kt. Rain likely before 5pm, then a chance of rain and snow. Seas around 4 ft.

Thursday Night

WNW wind around 15 kt, with gusts as high as 20 kt. A chance of snow. Seas around 2 ft.

Friday

W wind around 10 kt becoming SSW in the afternoon. Mostly sunny. Seas around 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.