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Gray/Portland, ME Local Forecast Office

6NM SSE Portsmouth NH

Marine Point Forecast

[NOTICE]
    • Today

      Today:S wind 5 to 10 kt increasing to 10 to 15 kt. Winds could gust as high as 25 kt. Rain, mainly after 2pm.   Seas 1 ft building to 3 ft.

      High: 47 °F

      ⇑S 15kt
      Waves Building3ft

    • Tonight

      Tonight:SSW wind 10 to 15 kt becoming W after midnight. Winds could gust as high as 25 kt. Rain, mainly before midnight.   Seas 3 to 4 ft.

      Low: 37 °F

      SSW 15kt
      3-4ft

    • Monday

      Monday:W wind 10 to 15 kt becoming NW in the afternoon. Sunny. Seas 3 ft subsiding to 1 ft.

      High: 39 °F

      WNW 15kt
      3ftWaves Subsiding

    • Monday Night

      Monday Night:Variable winds 5 kt or less. Increasing clouds. Seas around 1 ft.

      Low: 27 °F

      Light Wind
      1ft

    • Tuesday

      Tuesday:Variable winds 5 kt or less. Snow likely before 1pm, then rain.   Seas around 1 ft.

      High: 40 °F

      Light Wind
      1ft

    • Tuesday Night

      Tuesday Night:NNE wind around 10 kt becoming NNW after midnight. Rain and snow likely, becoming all snow after 9pm, then gradually ending.   Seas 1 to 2 ft.

      Low: 27 °F

      N 10kt
      1-2ft

    • Wednesday

      Wednesday:NW wind 5 to 10 kt becoming W in the afternoon. Sunny. Seas around 3 ft.

      High: 37 °F

      NW 10kt
      3ft

    • Wednesday Night

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

      Low: 31 °F

      SW 10kt
      3ft

    • Thursday

      Thursday:SW wind 10 to 15 kt, with gusts as high as 25 kt. Mostly cloudy. Seas around 3 ft.

      High: 39 °F

      SW 15kt
      3ft


High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 6:02 am EST Nov 30, 2025
Forecast Valid: 7am EST Nov 30, 2025-6pm EST Dec 6, 2025

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Detailed Forecast


Today
S wind 5 to 10 kt increasing to 10 to 15 kt. Winds could gust as high as 25 kt. Rain, mainly after 2pm. Seas 1 ft building to 3 ft.
Tonight
SSW wind 10 to 15 kt becoming W after midnight. Winds could gust as high as 25 kt. Rain, mainly before midnight. Seas 3 to 4 ft.
Monday
W wind 10 to 15 kt becoming NW in the afternoon. Sunny. Seas 3 ft subsiding to 1 ft.
Monday Night
Variable winds 5 kt or less. Increasing clouds. Seas around 1 ft.
Tuesday
Variable winds 5 kt or less. Snow likely before 1pm, then rain. Seas around 1 ft.
Tuesday Night
NNE wind around 10 kt becoming NNW after midnight. Rain and snow likely, becoming all snow after 9pm, then gradually ending. Seas 1 to 2 ft.
Wednesday
NW wind 5 to 10 kt becoming W in the afternoon. Sunny. Seas around 3 ft.
Wednesday Night
SW wind 5 to 10 kt. Mostly cloudy. Seas around 3 ft.
Thursday
SW wind 10 to 15 kt, with gusts as high as 25 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: 6:02 am EST Nov 30, 2025
Forecast Valid: 7am EST Nov 30, 2025-6pm EST Dec 6, 2025
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