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Gray/Portland, ME Local Forecast Office

18NM NNE Portsmouth NH

Marine Point Forecast

[NOTICE]
    • Thursday

      Thursday:S wind 5 to 8 kt increasing to 7 to 10 kt in the afternoon. Winds could gust as high as 20 kt. Showers and thunderstorms likely, mainly before 4pm.  Patchy fog before 9am.  Seas 1 ft or less.

      High: 85 °F

      ⇑S 10kt
      < 1ft

    • Thursday Night

      Thursday Night:SSW wind 5 to 10 kt becoming W after midnight. Mostly cloudy, then gradually becoming clear. Seas 1 ft or less.

      Low: 66 °F

      W 10kt
      < 1ft

    • Friday

      Friday:NW wind 5 to 10 kt, with gusts as high as 20 kt. Sunny. Seas 1 ft or less.

      High: 81 °F

      NW 10kt
      < 1ft

    • Friday Night

      Friday Night:Variable winds 5 kt or less. Mostly clear. Seas 1 ft or less.

      Low: 58 °F

      Light Wind
      < 1ft

    • Saturday

      Saturday:Variable winds 5 kt or less. Sunny. Seas 1 ft or less.

      High: 81 °F

      Light Wind
      < 1ft

    • Saturday Night

      Saturday Night:Variable winds 5 kt or less. Showers likely, mainly after 2am.   Seas 1 ft or less.

      Low: 63 °F

      Light Wind
      < 1ft

    • Sunday

      Sunday:Variable winds 5 kt or less. Showers likely, mainly before 8am.   Seas 1 ft or less.

      High: 79 °F

      Light Wind
      < 1ft

    • Sunday Night

      Sunday Night:Variable winds 5 kt or less. Mostly clear. Seas 1 ft or less.

      Low: 59 °F

      Light Wind
      < 1ft

    • Monday

      Monday:Variable winds 5 kt or less. Sunny. Seas 1 ft or less.

      High: 77 °F

      Light Wind
      < 1ft


High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 1:41 am EDT Jul 17, 2025
Forecast Valid: 2am EDT Jul 17, 2025-6pm EDT Jul 23, 2025

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Detailed Forecast


Thursday
S wind 5 to 8 kt increasing to 7 to 10 kt in the afternoon. Winds could gust as high as 20 kt. Showers and thunderstorms likely, mainly before 4pm. Patchy fog before 9am. Seas 1 ft or less.
Thursday Night
SSW wind 5 to 10 kt becoming W after midnight. Mostly cloudy, then gradually becoming clear. Seas 1 ft or less.
Friday
NW wind 5 to 10 kt, with gusts as high as 20 kt. Sunny. Seas 1 ft or less.
Friday Night
Variable winds 5 kt or less. Mostly clear. Seas 1 ft or less.
Saturday
Variable winds 5 kt or less. Sunny. Seas 1 ft or less.
Saturday Night
Variable winds 5 kt or less. Showers likely, mainly after 2am. Seas 1 ft or less.
Sunday
Variable winds 5 kt or less. Showers likely, mainly before 8am. Seas 1 ft or less.
Sunday Night
Variable winds 5 kt or less. Mostly clear. Seas 1 ft or less.
Monday
Variable winds 5 kt or less. Sunny. 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: 43.31°N 70.57°W
Last Update: 1:41 am EDT Jul 17, 2025
Forecast Valid: 2am EDT Jul 17, 2025-6pm EDT Jul 23, 2025
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