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Gray/Portland, ME Local Forecast Office

8NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]
    • Tonight

      Tonight:SE wind 15 to 18 kt increasing to 17 to 20 kt after midnight. Winds could gust as high as 25 kt. A chance of rain after 5am.   Seas 1 ft building to 3 ft.

      Low: 37 °F

      ⇑SE 20kt
      Waves Building3ft

    • Monday

      Monday:SE wind around 25 kt becoming S in the afternoon. Winds could gust as high as 35 kt. Rain and possibly a thunderstorm.   Seas 4 to 5 ft.

      High: 49 °F

      SSE 25kt
      4-5ft

    • Monday Night

      Monday Night:S wind around 25 kt, with gusts as high as 45 kt. Rain and possibly a thunderstorm.   Seas 5 ft building to 7 ft.

      Low: 43 °F

      S 25kt
      Waves Building7ft

    • Tuesday

      Tuesday:W wind around 20 kt, with gusts as high as 30 kt. A chance of rain before 10am.   Seas 5 to 6 ft.

      High: 45 °F

      W 20kt
      5-6ft

    • Tuesday Night

      Tuesday Night:W wind 20 to 25 kt, with gusts as high as 30 kt. Mostly clear. Seas 4 to 5 ft.

      Low: 25 °F

      W 25kt
      4-5ft

    • Wednesday

      Wednesday:WNW wind 10 to 15 kt decreasing to 5 to 10 kt in the afternoon. Winds could gust as high as 25 kt. Sunny. Seas 3 to 4 ft.

      High: 36 °F

      WNW 15kt⇓
      3-4ft

    • Wednesday Night

      Wednesday Night:SSW wind 10 to 15 kt. Mostly cloudy. Seas 3 to 4 ft.

      Low: 32 °F

      SSW 15kt
      3-4ft

    • Thursday

      Thursday:SSE wind around 15 kt, with gusts as high as 20 kt. Partly sunny. Seas around 3 ft.

      High: 39 °F

      SSE 15kt
      3ft

    • Thursday Night

      Thursday Night:SSE wind around 15 kt becoming SSW after midnight. Winds could gust as high as 20 kt. Mostly cloudy. Seas around 3 ft.

      Low: 35 °F

      SSE 15kt
      3ft


High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 2:25 pm EDT Mar 15, 2026
Forecast Valid: 4pm EDT Mar 15, 2026-6pm EDT Mar 22, 2026

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Detailed Forecast


Tonight
SE wind 15 to 18 kt increasing to 17 to 20 kt after midnight. Winds could gust as high as 25 kt. A chance of rain after 5am. Seas 1 ft building to 3 ft.
Monday
SE wind around 25 kt becoming S in the afternoon. Winds could gust as high as 35 kt. Rain and possibly a thunderstorm. Seas 4 to 5 ft.
Monday Night
S wind around 25 kt, with gusts as high as 45 kt. Rain and possibly a thunderstorm. Seas 5 ft building to 7 ft.
Tuesday
W wind around 20 kt, with gusts as high as 30 kt. A chance of rain before 10am. Seas 5 to 6 ft.
Tuesday Night
W wind 20 to 25 kt, with gusts as high as 30 kt. Mostly clear. Seas 4 to 5 ft.
Wednesday
WNW wind 10 to 15 kt decreasing to 5 to 10 kt in the afternoon. Winds could gust as high as 25 kt. Sunny. Seas 3 to 4 ft.
Wednesday Night
SSW wind 10 to 15 kt. Mostly cloudy. Seas 3 to 4 ft.
Thursday
SSE wind around 15 kt, with gusts as high as 20 kt. Partly sunny. Seas around 3 ft.
Thursday Night
SSE wind around 15 kt becoming SSW after midnight. Winds could gust as high as 20 kt. Mostly cloudy. Seas around 3 ft.

*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: 2:25 pm EDT Mar 15, 2026
Forecast Valid: 4pm EDT Mar 15, 2026-6pm EDT Mar 22, 2026
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