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Gray/Portland, ME Local Forecast Office

6NM SSE Portsmouth NH

Marine Point Forecast

[NOTICE]

Wednesday
High: 68 °F
Light Wind
3-4ft
Wednesday Night
Low: 50 °F
NW 10kt
2-3ft
Thursday
High: 59 °F
NNW 10kt⇓
2ft
Thursday Night
Low: 49 °F
Light Wind
1ft
Friday
High: 60 °F
SSE 15kt
3ft
Friday Night
Low: 43 °F
⇑WNW 15kt
3ft
Saturday
High: 48 °F
WNW 20kt
2ft
Saturday Night
Low: 37 °F
WNW 10kt
1ft
Sunday
High: 54 °F
W 10kt
1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 2:32 am EDT Oct 14, 2026
Forecast Valid: 4am EDT Oct 14, 2026-6pm EDT Oct 20, 2026

View Nearby Observations

Detailed Forecast

Wednesday

Variable winds 5 kt or less. Patchy dense fog before 9am. Seas 3 to 4 ft.

Wednesday Night

NW wind around 10 kt, with gusts as high as 20 kt. Mostly clear. Seas 2 to 3 ft.

Thursday

NNW wind 7 to 10 kt decreasing to 5 to 8 kt in the afternoon. Sunny. Seas around 2 ft.

Thursday Night

Variable winds 5 kt or less. A chance of showers after 3am. Seas around 1 ft.

Friday

SSE wind 10 to 15 kt. Showers. Seas 1 ft building to 3 ft.

Friday Night

WSW wind 10 to 13 kt becoming WNW 12 to 15 kt after midnight. Winds could gust as high as 25 kt. Showers likely, mainly before midnight. Seas around 3 ft.

Saturday

WNW wind 15 to 20 kt, with gusts as high as 25 kt. Mostly sunny. Seas around 2 ft.

Saturday Night

WNW wind around 10 kt. Mostly clear. Seas around 1 ft.

Sunday

W wind around 10 kt. Sunny. 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.