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Gray/Portland, ME Local Forecast Office

8NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]

Today
High: 68 °F
WSW 15kt
2ft
Tonight
Low: 55 °F
N 15kt
2ft
Monday
High: 63 °F
N 10kt⇓
1-2ft
Monday Night
Low: 57 °F
SSW 10kt
1ft
Tuesday
High: 65 °F
S 10kt
1ft
Tuesday Night
Low: 60 °F
SW 10kt
1ft
Wednesday
High: 69 °F
S 10kt
1ft
Wednesday Night
Low: 62 °F
S 10kt
1ft
Thursday
High: 69 °F
SW 10kt
1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 6:33 am EDT Jun 7, 2026
Forecast Valid: 6am EDT Jun 7, 2026-6pm EDT Jun 13, 2026

View Nearby Observations

Detailed Forecast

Today

WSW wind 10 to 15 kt becoming WNW in the afternoon. A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 4pm. Seas around 2 ft.

Tonight

N wind 10 to 15 kt. Showers likely, mainly before 8pm. Seas around 2 ft.

Monday

N wind 7 to 10 kt becoming SSE 5 to 8 kt in the afternoon. Sunny. Seas 1 to 2 ft.

Monday Night

SSW wind 5 to 10 kt becoming W after midnight. Mostly clear. Seas around 1 ft.

Tuesday

W wind 5 to 10 kt becoming S in the afternoon. Sunny. Seas around 1 ft.

Tuesday Night

SW wind around 10 kt. Partly cloudy. Seas around 1 ft.

Wednesday

SW wind 5 to 10 kt becoming S in the afternoon. Partly sunny. Seas around 1 ft.

Wednesday Night

S wind around 10 kt becoming SW after midnight. A chance of showers. Seas around 1 ft.

Thursday

SW wind 5 to 10 kt becoming SSE in the afternoon. A chance of showers. Seas around 1 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.