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Gray/Portland, ME Local Forecast Office

3NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]
    • Overnight

      Overnight:W wind 5 to 10 kt becoming NNE. Mostly cloudy. Seas 1 ft or less.

      Low: 37 °F

      NNE 10kt
      < 1ft

    • Wednesday

      Wednesday:NE wind 12 to 15 kt decreasing to 10 to 13 kt in the afternoon. A chance of rain, mainly after 5pm.  Patchy fog between 1pm and 2pm, then Patchy fog after 3pm.  Seas 1 ft or less.

      High: 40 °F

      NE 15kt⇓
      < 1ft

    • Wednesday Night

      Wednesday Night:SE wind 5 to 10 kt becoming SSW after midnight. Rain likely, mainly between 8pm and midnight.  Areas of dense fog.  Seas 1 ft or less.

      Low: 40 °FRising Temperatures

      SSW 10kt
      < 1ft

    • Thursday

      Thursday:WSW wind 10 to 15 kt becoming WNW in the afternoon. Winds could gust as high as 30 kt. A chance of showers before 10am.  Patchy fog before 9am.  Seas 1 ft or less.

      High: 51 °F

      W 15kt
      < 1ft

    • Thursday Night

      Thursday Night:WNW wind around 15 kt, with gusts as high as 25 kt. Partly cloudy. Seas 1 ft or less.

      Low: 30 °FRising Temperatures

      WNW 15kt
      < 1ft

    • Friday

      Friday:W wind 10 to 15 kt becoming S in the afternoon. Winds could gust as high as 25 kt. Mostly sunny. Seas 1 ft or less.

      High: 42 °F

      S 15kt
      < 1ft

    • Friday Night

      Friday Night:S wind 10 to 15 kt, with gusts as high as 25 kt. Rain and snow likely before 2am, then a chance of rain.   Seas 1 ft or less.

      Low: 35 °FRising Temperatures

      S 15kt
      < 1ft

    • Saturday

      Saturday:W wind around 15 kt, with gusts as high as 30 kt. A chance of rain.   Seas 1 ft or less.

      High: 45 °F

      W 15kt
      < 1ft

    • Saturday Night

      Saturday Night:W wind 5 to 10 kt, with gusts as high as 20 kt. Partly cloudy. Seas 1 ft or less.

      Low: 30 °FRising Temperatures

      W 10kt
      < 1ft


High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 10:27 pm EDT Mar 10, 2026
Forecast Valid: 12am EDT Mar 11, 2026-6pm EDT Mar 17, 2026

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Detailed Forecast


Overnight
W wind 5 to 10 kt becoming NNE. Mostly cloudy. Seas 1 ft or less.
Wednesday
NE wind 12 to 15 kt decreasing to 10 to 13 kt in the afternoon. A chance of rain, mainly after 5pm. Patchy fog between 1pm and 2pm, then Patchy fog after 3pm. Seas 1 ft or less.
Wednesday Night
SE wind 5 to 10 kt becoming SSW after midnight. Rain likely, mainly between 8pm and midnight. Areas of dense fog. Seas 1 ft or less.
Thursday
WSW wind 10 to 15 kt becoming WNW in the afternoon. Winds could gust as high as 30 kt. A chance of showers before 10am. Patchy fog before 9am. Seas 1 ft or less.
Thursday Night
WNW wind around 15 kt, with gusts as high as 25 kt. Partly cloudy. Seas 1 ft or less.
Friday
W wind 10 to 15 kt becoming S in the afternoon. Winds could gust as high as 25 kt. Mostly sunny. Seas 1 ft or less.
Friday Night
S wind 10 to 15 kt, with gusts as high as 25 kt. Rain and snow likely before 2am, then a chance of rain. Seas 1 ft or less.
Saturday
W wind around 15 kt, with gusts as high as 30 kt. A chance of rain. Seas 1 ft or less.
Saturday Night
W wind 5 to 10 kt, with gusts as high as 20 kt. Partly cloudy. Seas 1 ft or less.

*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: 10:27 pm EDT Mar 10, 2026
Forecast Valid: 12am EDT Mar 11, 2026-6pm EDT Mar 17, 2026
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