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Gray/Portland, ME Local Forecast Office

18NM NNE Portsmouth NH

Marine Point Forecast

[NOTICE]
    • Tuesday

      Tuesday:S wind 5 to 8 kt increasing to 7 to 10 kt in the afternoon. Winds could gust as high as 20 kt. A slight chance of showers between 3pm and 5pm, then a chance of showers and thunderstorms after 5pm.   Seas 1 ft or less.

      High: 77 °F

      ⇑S 10kt
      < 1ft

    • Tuesday Night

      Tuesday Night:SSE wind 5 to 10 kt becoming SSW after midnight. Showers and thunderstorms before 2am, then a chance of showers.  Patchy fog between 10pm and 3am.  Seas 1 ft or less.

      Low: 62 °F

      SSE 10kt
      < 1ft

    • Wednesday

      Wednesday:S wind 5 to 10 kt. A slight chance of showers, then a chance of showers and thunderstorms after 8am.   Seas 1 ft or less.

      High: 84 °F

      S 10kt
      < 1ft

    • Wednesday Night

      Wednesday Night:Variable winds 5 kt or less. Partly cloudy. Seas 1 ft or less.

      Low: 59 °F

      Light Wind
      < 1ft

    • Thursday

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

      High: 79 °F

      Light Wind
      < 1ft

    • Thursday Night

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

      Low: 57 °F

      Light Wind
      < 1ft

    • Friday

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

      High: 79 °F

      Light Wind
      < 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: 77 °F

      Light Wind
      < 1ft


High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 2:26 am EDT Jul 21, 2026
Forecast Valid: 3am EDT Jul 21, 2026-6pm EDT Jul 27, 2026

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Detailed Forecast


Tuesday
S wind 5 to 8 kt increasing to 7 to 10 kt in the afternoon. Winds could gust as high as 20 kt. A slight chance of showers between 3pm and 5pm, then a chance of showers and thunderstorms after 5pm. Seas 1 ft or less.
Tuesday Night
SSE wind 5 to 10 kt becoming SSW after midnight. Showers and thunderstorms before 2am, then a chance of showers. Patchy fog between 10pm and 3am. Seas 1 ft or less.
Wednesday
S wind 5 to 10 kt. A slight chance of showers, then a chance of showers and thunderstorms after 8am. Seas 1 ft or less.
Wednesday Night
Variable winds 5 kt or less. Partly cloudy. Seas 1 ft or less.
Thursday
Variable winds 5 kt or less. Sunny. Seas 1 ft or less.
Thursday Night
Variable winds 5 kt or less. Mostly clear. Seas 1 ft or less.
Friday
Variable winds 5 kt or less. 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.

*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: 2:26 am EDT Jul 21, 2026
Forecast Valid: 3am EDT Jul 21, 2026-6pm EDT Jul 27, 2026
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