For More Weather Information:

Gray/Portland, ME Local Forecast Office

8NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]

Overnight
Low: 61 °F
S 15kt
3ft
Monday
High: 70 °F
SW 10kt
1-2ft
Monday Night
Low: 58 °F
NW 10kt
1ft
Tuesday
High: 65 °F
⇑SSE 10kt
1ft
Tuesday Night
Low: 58 °F
S 10kt⇓
1-2ft
Wednesday
High: 64 °F
⇑SSE 10kt
1-2ft
Wednesday Night
Low: 59 °F
S 10kt⇓
2ft
Thursday
High: 67 °F
⇑SSE 20kt
3ft
Thursday Night
Low: 62 °F
S 20kt⇓
3ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 8:04 pm EDT Jun 14, 2026
Forecast Valid: 12am EDT Jun 15, 2026-6pm EDT Jun 21, 2026

View Nearby Observations

Detailed Forecast

Overnight

S wind around 15 kt, with gusts as high as 20 kt. Showers and thunderstorms likely before 4am, then rain and possibly a thunderstorm between 4am and 5am, then scattered showers and thunderstorms after 5am. Seas around 3 ft.

Monday

SW wind 5 to 10 kt becoming WNW in the morning. Scattered showers, mainly before 8am. Patchy fog between 7am and 8am. Seas 1 to 2 ft.

Monday Night

NW wind 5 to 10 kt. Mostly clear. Seas around 1 ft.

Tuesday

WNW wind 5 to 8 kt becoming SSE 7 to 10 kt in the afternoon. Sunny. Seas around 1 ft.

Tuesday Night

S wind 7 to 10 kt becoming SW 5 to 8 kt after midnight. Mostly clear. Seas 1 to 2 ft.

Wednesday

Variable winds less than 5 kt becoming SSE 5 to 10 kt in the afternoon. Mostly sunny. Seas 1 to 2 ft.

Wednesday Night

S wind 7 to 10 kt decreasing to 5 to 8 kt after midnight. Mostly cloudy. Seas around 2 ft.

Thursday

SSE wind 5 to 10 kt increasing to 15 to 20 kt. Showers likely. Seas 1 ft building to 3 ft.

Thursday Night

S wind 17 to 20 kt becoming WSW 15 to 18 kt after midnight. Showers likely. Seas around 3 ft.

Winds and seas higher in and near tstms.

*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.