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Gray/Portland, ME Local Forecast Office

8NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]

Tonight
Low: 58 °F
S 10kt⇓
1ft
Wednesday
High: 66 °F
⇑SSE 10kt
1ft
Wednesday Night
Low: 59 °F
S 15kt
1-2ft
Thursday
High: 68 °F
⇑SSE 20kt
3ft
Thursday Night
Low: 61 °F
SSW 20kt
3-4ft
Juneteenth
High: 71 °F
WSW 15kt
2ft
Friday Night
Low: 60 °F
W 15kt
2ft
Saturday
High: 70 °F
W 15kt
2ft
Saturday Night
Low: 60 °F
W 10kt
1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 7:35 pm EDT Jun 16, 2026
Forecast Valid: 7pm EDT Jun 16, 2026-6pm EDT Jun 23, 2026

View Nearby Observations

Detailed Forecast

Tonight

S wind 7 to 10 kt becoming WSW 5 to 8 kt after midnight. Mostly clear. Seas around 1 ft.

Wednesday

Variable winds less than 5 kt becoming SSE 5 to 10 kt in the afternoon. Mostly sunny. Seas around 1 ft.

Wednesday Night

S wind 10 to 15 kt. Patchy fog after 3am. Seas 1 to 2 ft.

Thursday

SSE wind 10 to 15 kt increasing to 15 to 20 kt in the afternoon. Winds could gust as high as 30 kt. Showers. Patchy fog before 10am. Seas 1 ft building to 3 ft.

Thursday Night

SSW wind 15 to 20 kt becoming WSW after midnight. A chance of showers before 10pm. Seas 3 to 4 ft.

Juneteenth

WSW wind 10 to 15 kt. Mostly sunny. Seas around 2 ft.

Friday Night

W wind 10 to 15 kt. Mostly clear. Seas around 2 ft.

Saturday

W wind 10 to 15 kt. Sunny. Seas around 2 ft.

Saturday Night

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