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Gray/Portland, ME Local Forecast Office

8NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]
    • Tonight

      Tonight:ESE wind 5 to 8 kt becoming S 15 to 20 kt. Winds could gust as high as 30 kt. Showers and thunderstorms likely, mainly before 3am.   Seas 2 ft building to 4 ft.

      Low: 40 °FRising Temperatures

      ⇑S 20kt
      Waves Building4ft

    • Thursday

      Thursday:SSW wind around 20 kt becoming W in the afternoon. Winds could gust as high as 25 kt. Rain showers likely before 5pm, then a chance of rain and snow showers.   Seas 3 to 4 ft.

      High: 46 °FFalling Temperatures

      SSW 20kt
      3-4ft

    • Thursday Night

      Thursday Night:WNW wind 15 to 20 kt, with gusts as high as 30 kt. A chance of snow showers, mainly before 7pm.   Seas around 3 ft.

      Low: 31 °F

      WNW 20kt
      3ft

    • Friday

      Friday:W wind 10 to 13 kt becoming S 12 to 15 kt in the afternoon. Winds could gust as high as 20 kt. Increasing clouds. Seas 2 to 3 ft.

      High: 41 °F

      ⇑S 15kt
      2-3ft

    • Friday Night

      Friday Night:S wind 20 to 25 kt. A chance of rain and snow before midnight, then a chance of rain between midnight and 1am.   Seas 4 to 5 ft.

      Low: 39 °F

      S 25kt
      4-5ft

    • Saturday

      Saturday:W wind 20 to 25 kt, with gusts as high as 30 kt. Mostly sunny. Seas 4 to 5 ft.

      High: 43 °F

      W 25kt
      4-5ft

    • Saturday Night

      Saturday Night:W wind 20 to 25 kt decreasing to 15 to 20 kt after midnight. Winds could gust as high as 30 kt. Partly cloudy. Seas 2 to 3 ft.

      Low: 31 °F

      W 25kt⇓
      2-3ft

    • Sunday

      Sunday:WNW wind 5 to 10 kt becoming SSE in the afternoon. Mostly cloudy. Seas around 1 ft.

      High: 41 °F

      WNW 10kt
      1ft

    • Sunday Night

      Sunday Night:SE wind 15 to 20 kt increasing to 20 to 25 kt after midnight. Winds could gust as high as 30 kt. Rain likely.   Seas 2 ft building to 5 ft.

      Low: 38 °F

      ⇑SE 25kt
      Waves Building5ft


High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 2:38 pm EDT Mar 11, 2026
Forecast Valid: 6pm EDT Mar 11, 2026-6pm EDT Mar 18, 2026

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Detailed Forecast


Tonight
ESE wind 5 to 8 kt becoming S 15 to 20 kt. Winds could gust as high as 30 kt. Showers and thunderstorms likely, mainly before 3am. Seas 2 ft building to 4 ft.
Thursday
SSW wind around 20 kt becoming W in the afternoon. Winds could gust as high as 25 kt. Rain showers likely before 5pm, then a chance of rain and snow showers. Seas 3 to 4 ft.
Thursday Night
WNW wind 15 to 20 kt, with gusts as high as 30 kt. A chance of snow showers, mainly before 7pm. Seas around 3 ft.
Friday
W wind 10 to 13 kt becoming S 12 to 15 kt in the afternoon. Winds could gust as high as 20 kt. Increasing clouds. Seas 2 to 3 ft.
Friday Night
S wind 20 to 25 kt. A chance of rain and snow before midnight, then a chance of rain between midnight and 1am. Seas 4 to 5 ft.
Saturday
W wind 20 to 25 kt, with gusts as high as 30 kt. Mostly sunny. Seas 4 to 5 ft.
Saturday Night
W wind 20 to 25 kt decreasing to 15 to 20 kt after midnight. Winds could gust as high as 30 kt. Partly cloudy. Seas 2 to 3 ft.
Sunday
WNW wind 5 to 10 kt becoming SSE in the afternoon. Mostly cloudy. Seas around 1 ft.
Sunday Night
SE wind 15 to 20 kt increasing to 20 to 25 kt after midnight. Winds could gust as high as 30 kt. Rain likely. Seas 2 ft building to 5 ft.

Winds and seas higher in and near tstms.

*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: 2:38 pm EDT Mar 11, 2026
Forecast Valid: 6pm EDT Mar 11, 2026-6pm EDT Mar 18, 2026
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