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Gray/Portland, ME Local Forecast Office

8NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]

Today
High: 67 °F
⇑SSE 25kt
4ft
Tonight
Low: 61 °F
WSW 15kt
3-4ft
Juneteenth
High: 71 °F
WSW 15kt
2ft
Friday Night
Low: 61 °F
W 15kt
2ft
Saturday
High: 69 °F
W 15kt
2ft
Saturday Night
Low: 59 °F
W 10kt
1-2ft
Sunday
High: 66 °F
Light Wind
1ft
Sunday Night
Low: 59 °F
Light Wind
1ft
Monday
High: 65 °F
⇑ESE 10kt
1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 2:23 am EDT Jun 18, 2026
Forecast Valid: 5am EDT Jun 18, 2026-6pm EDT Jun 24, 2026

View Nearby Observations

Detailed Forecast

Today

SSE wind 10 to 15 kt increasing to 20 to 25 kt. Winds could gust as high as 35 kt. Showers likely, then showers and possibly a thunderstorm after 2pm. Some of the storms could be severe. Patchy fog between 8am and 10am. Seas 2 ft building to 4 ft.

Tonight

SSW wind 10 to 15 kt becoming WSW after midnight. Showers and thunderstorms likely before 8pm, then a slight chance of showers between 8pm and 10pm. Some of the storms could be severe. Seas 3 to 4 ft.

Juneteenth

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

Friday Night

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

Saturday

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

Saturday Night

W wind around 10 kt. Partly cloudy. Seas 1 to 2 ft.

Sunday

Variable winds 5 kt or less. A chance of showers after 2pm. Seas around 1 ft.

Sunday Night

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

Monday

Variable winds less than 5 kt becoming ESE 5 to 10 kt 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.