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Gray/Portland, ME Local Forecast Office

6NM SSE Portsmouth NH

Marine Point Forecast

[NOTICE]
    • Tonight

      Tonight:WNW wind 5 to 10 kt becoming variable and less than 5 kt in the evening. Increasing clouds. Seas around 1 ft.

      Low: 32 °F

      WNW 10kt⇓
      1ft

    • Sunday

      Sunday:S wind 5 to 10 kt increasing to 10 to 15 kt. Winds could gust as high as 25 kt. Rain, mainly after 3pm.   Seas 1 ft building to 3 ft.

      High: 48 °F

      ⇑S 15kt
      Waves Building3ft

    • Sunday Night

      Sunday Night:S wind 10 to 15 kt becoming W after midnight. Winds could gust as high as 20 kt. Rain, mainly before midnight.   Seas 3 to 4 ft.

      Low: 36 °F

      S 15kt
      3-4ft

    • Monday

      Monday:W wind 10 to 15 kt becoming NW in the afternoon. Winds could gust as high as 20 kt. Sunny. Seas 2 to 3 ft.

      High: 40 °F

      WNW 15kt
      2-3ft

    • Monday Night

      Monday Night:NW wind 5 to 10 kt becoming variable and less than 5 kt in the evening. Mostly cloudy. Seas around 1 ft.

      Low: 27 °F

      NW 10kt⇓
      1ft

    • Tuesday

      Tuesday:Variable winds 5 kt or less. A chance of snow before 11am, then rain and snow.   Seas around 1 ft.

      High: 39 °F

      Light Wind
      1ft

    • Tuesday Night

      Tuesday Night:N wind 10 to 13 kt increasing to 12 to 15 kt after midnight. Rain and snow before 3am, then a chance of snow.   Seas 1 ft building to 3 ft.

      Low: 30 °F

      ⇑N 15kt
      Waves Building3ft

    • Wednesday

      Wednesday:NNW wind 5 to 10 kt becoming W in the afternoon. Mostly sunny. Seas around 3 ft.

      High: 38 °F

      NNW 10kt
      3ft

    • Wednesday Night

      Wednesday Night:SW wind 5 to 10 kt. Mostly cloudy. Seas around 3 ft.

      Low: 31 °F

      SW 10kt
      3ft


High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 6:51 pm EST Nov 29, 2025
Forecast Valid: 6pm EST Nov 29, 2025-6pm EST Dec 6, 2025

View Nearby Observations

Detailed Forecast


Tonight
WNW wind 5 to 10 kt becoming variable and less than 5 kt in the evening. Increasing clouds. Seas around 1 ft.
Sunday
S wind 5 to 10 kt increasing to 10 to 15 kt. Winds could gust as high as 25 kt. Rain, mainly after 3pm. Seas 1 ft building to 3 ft.
Sunday Night
S wind 10 to 15 kt becoming W after midnight. Winds could gust as high as 20 kt. Rain, mainly before midnight. Seas 3 to 4 ft.
Monday
W wind 10 to 15 kt becoming NW in the afternoon. Winds could gust as high as 20 kt. Sunny. Seas 2 to 3 ft.
Monday Night
NW wind 5 to 10 kt becoming variable and less than 5 kt in the evening. Mostly cloudy. Seas around 1 ft.
Tuesday
Variable winds 5 kt or less. A chance of snow before 11am, then rain and snow. Seas around 1 ft.
Tuesday Night
N wind 10 to 13 kt increasing to 12 to 15 kt after midnight. Rain and snow before 3am, then a chance of snow. Seas 1 ft building to 3 ft.
Wednesday
NNW wind 5 to 10 kt becoming W in the afternoon. Mostly sunny. Seas around 3 ft.
Wednesday Night
SW wind 5 to 10 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: 42.98°N 70.74°W
Last Update: 6:51 pm EST Nov 29, 2025
Forecast Valid: 6pm EST Nov 29, 2025-6pm EST Dec 6, 2025
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