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Gray/Portland, ME Local Forecast Office

8NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]
    • Today

      Today:NW wind 35 to 40 km/h decreasing to 25 to 30 km/h. Winds could gust as high as 50 km/h. Sunny. Seas around 1 m.

      High: -4 °C

      NW 40km/h⇓
      1m

    • Tonight

      Tonight:NW wind 22 to 25 km/h decreasing to 20 to 23 km/h after midnight. Winds could gust as high as 35 km/h. Mostly clear. Seas around 1 m.

      Low: -8 °C

      NW 25km/h⇓
      1m

    • Tuesday

      Tuesday:W wind 15 to 20 km/h becoming SSW 20 to 25 km/h in the afternoon. Winds could gust as high as 35 km/h. Increasing clouds. Seas 1 m or less.

      High: 2 °C

      ⇑SSW 25km/h
      < 1m

    • Tuesday Night

      Tuesday Night:SSW wind 30 to 35 km/h, with gusts as high as 45 km/h. A chance of snow before midnight, then a chance of rain and snow between midnight and 1am, then a chance of rain after 1am.   Seas around 1 m.

      Low: 0 °C

      SSW 35km/h
      1m

    • Wednesday

      Wednesday:SSW wind 25 to 30 km/h increasing to 30 to 35 km/h in the afternoon. Winds could gust as high as 45 km/h. Rain likely, mainly after 2pm.   Seas around 1 m.

      High: 7 °C

      ⇑SSW 35km/h
      1m

    • Wednesday Night

      Wednesday Night:SW wind 30 to 35 km/h, with gusts as high as 45 km/h. Rain likely, mainly before 8pm.   Seas around 1 m.

      Low: 1 °C

      SW 35km/h
      1m

    • Thursday

      Thursday:W wind around 30 km/h, with gusts as high as 45 km/h. Mostly sunny. Seas around 1 m.

      High: 3 °C

      W 30km/h
      1m

    • Thursday Night

      Thursday Night:W wind around 30 km/h, with gusts as high as 40 km/h. Partly cloudy. Seas around 1 m.

      Low: -2 °C

      W 30km/h
      1m

    • Friday

      Friday:W wind 25 to 30 km/h, with gusts as high as 40 km/h. Mostly sunny. Seas around 1 m.

      High: 1 °C

      W 30km/h
      1m


High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 5:53 am EST Dec 8, 2025
Forecast Valid: 6am EST Dec 8, 2025-6pm EST Dec 14, 2025

View Nearby Observations

Detailed Forecast


Today
NW wind 35 to 40 km/h decreasing to 25 to 30 km/h. Winds could gust as high as 50 km/h. Sunny. Seas around 1 m.
Tonight
NW wind 22 to 25 km/h decreasing to 20 to 23 km/h after midnight. Winds could gust as high as 35 km/h. Mostly clear. Seas around 1 m.
Tuesday
W wind 15 to 20 km/h becoming SSW 20 to 25 km/h in the afternoon. Winds could gust as high as 35 km/h. Increasing clouds. Seas 1 m or less.
Tuesday Night
SSW wind 30 to 35 km/h, with gusts as high as 45 km/h. A chance of snow before midnight, then a chance of rain and snow between midnight and 1am, then a chance of rain after 1am. Seas around 1 m.
Wednesday
SSW wind 25 to 30 km/h increasing to 30 to 35 km/h in the afternoon. Winds could gust as high as 45 km/h. Rain likely, mainly after 2pm. Seas around 1 m.
Wednesday Night
SW wind 30 to 35 km/h, with gusts as high as 45 km/h. Rain likely, mainly before 8pm. Seas around 1 m.
Thursday
W wind around 30 km/h, with gusts as high as 45 km/h. Mostly sunny. Seas around 1 m.
Thursday Night
W wind around 30 km/h, with gusts as high as 40 km/h. Partly cloudy. Seas around 1 m.
Friday
W wind 25 to 30 km/h, with gusts as high as 40 km/h. Mostly sunny. Seas around 1 m.

*Notices:

  1. 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.
  2. 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.
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ABOUT THIS FORECAST

Point Forecast: 42.99°N 70.62°W
Last Update: 5:53 am EST Dec 8, 2025
Forecast Valid: 6am EST Dec 8, 2025-6pm EST Dec 14, 2025
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