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Gray/Portland, ME Local Forecast Office

3NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]
    • Tonight

      Tonight:NE wind 5 to 10 kt becoming ESE after midnight. Rain and thunderstorms likely before 11pm, then a chance of rain.   Seas 1 ft or less.

      Low: 41 °F

      NE 10kt
      < 1ft

    • Wednesday

      Wednesday:SW wind around 10 kt becoming NNE in the afternoon. A chance of rain, mainly between 1pm and 3pm.   Seas 1 ft or less.

      High: 55 °F

      SW 10kt
      < 1ft

    • Wednesday Night

      Wednesday Night:ENE wind around 10 kt, with gusts as high as 25 kt. A chance of rain, mainly after 8pm.   Seas 1 ft or less.

      Low: 35 °F

      ENE 10kt
      < 1ft

    • Thursday

      Thursday:ENE wind around 15 kt, with gusts as high as 25 kt. A chance of rain before 10am, then a chance of rain and sleet between 10am and 1pm, then a chance of rain after 1pm.   Seas 1 ft or less.

      High: 38 °F

      ENE 15kt
      < 1ft

    • Thursday Night

      Thursday Night:E wind 5 to 10 kt, with gusts as high as 20 kt. A chance of rain.   Seas 1 ft or less.

      Low: 37 °F

      E 10kt
      < 1ft

    • Friday

      Friday:SSE wind 5 to 10 kt becoming S in the afternoon. Mostly cloudy. Seas 1 ft or less.

      High: 58 °F

      S 10kt
      < 1ft

    • Friday Night

      Friday Night:SW wind around 10 kt, with gusts as high as 20 kt. Mostly cloudy. Seas 1 ft or less.

      Low: 48 °F

      SW 10kt
      < 1ft

    • Saturday

      Saturday:W wind around 10 kt becoming E in the afternoon. Winds could gust as high as 20 kt. Partly sunny. Seas 1 ft or less.

      High: 56 °F

      E 10kt
      < 1ft

    • Saturday Night

      Saturday Night:E wind 5 to 10 kt. A chance of rain.   Seas 1 ft or less.

      Low: 41 °F

      E 10kt
      < 1ft


High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 2:27 pm EDT Mar 31, 2026
Forecast Valid: 6pm EDT Mar 31, 2026-6pm EDT Apr 7, 2026

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Detailed Forecast


Tonight
NE wind 5 to 10 kt becoming ESE after midnight. Rain and thunderstorms likely before 11pm, then a chance of rain. Seas 1 ft or less.
Wednesday
SW wind around 10 kt becoming NNE in the afternoon. A chance of rain, mainly between 1pm and 3pm. Seas 1 ft or less.
Wednesday Night
ENE wind around 10 kt, with gusts as high as 25 kt. A chance of rain, mainly after 8pm. Seas 1 ft or less.
Thursday
ENE wind around 15 kt, with gusts as high as 25 kt. A chance of rain before 10am, then a chance of rain and sleet between 10am and 1pm, then a chance of rain after 1pm. Seas 1 ft or less.
Thursday Night
E wind 5 to 10 kt, with gusts as high as 20 kt. A chance of rain. Seas 1 ft or less.
Friday
SSE wind 5 to 10 kt becoming S in the afternoon. Mostly cloudy. Seas 1 ft or less.
Friday Night
SW wind around 10 kt, with gusts as high as 20 kt. Mostly cloudy. Seas 1 ft or less.
Saturday
W wind around 10 kt becoming E in the afternoon. Winds could gust as high as 20 kt. Partly sunny. Seas 1 ft or less.
Saturday Night
E wind 5 to 10 kt. A chance of rain. Seas 1 ft or less.

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: 43.02°N 70.73°W
Last Update: 2:27 pm EDT Mar 31, 2026
Forecast Valid: 6pm EDT Mar 31, 2026-6pm EDT Apr 7, 2026
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