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Gray/Portland, ME Local Forecast Office

10NM S Portsmouth NH

Marine Point Forecast

[NOTICE]
    • Late Afternoon

      Late Afternoon:Variable winds 5 kt or less. Isolated showers.   Seas around 1 ft.

      High: 80 °F

      Light Wind
      1ft

    • Tonight

      Tonight:Variable winds 5 kt or less. Isolated showers before 8pm.  Patchy fog between 3am and 4am, then Patchy fog after 5am.  Seas around 1 ft.

      Low: 68 °F

      Light Wind
      1ft

    • Wednesday

      Wednesday:Variable winds 5 kt or less. Widespread haze between 9am and noon. Patchy fog between 7am and 9am.  Seas around 1 ft.

      High: 83 °F

      Light Wind
      1ft

    • Wednesday Night

      Wednesday Night:Variable winds 5 kt or less. Patchy fog.  Seas around 1 ft.

      Low: 71 °F

      Light Wind
      1ft

    • Thursday

      Thursday:Variable winds 5 kt or less. A chance of showers between 10am and 2pm, then a chance of showers and thunderstorms after 2pm.  Patchy fog before 9am.  Seas around 1 ft.

      High: 83 °F

      Light Wind
      1ft

    • Thursday Night

      Thursday Night:SSW wind around 10 kt becoming W after midnight. A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 9pm.  Patchy fog.  Seas around 1 ft.

      Low: 72 °F

      SSW 10kt
      1ft

    • Friday

      Friday:WNW wind 5 to 10 kt becoming NNW in the afternoon. Patchy fog before 9am.  Seas around 1 ft.

      High: 80 °F

      WNW 10kt
      1ft

    • Friday Night

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

      Low: 63 °F

      Light Wind
      1ft

    • Saturday

      Saturday:Variable winds 5 kt or less. Mostly sunny. Seas around 1 ft.

      High: 76 °F

      Light Wind
      1ft


High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 1:48 pm EDT Jul 15, 2025
Forecast Valid: 5pm EDT Jul 15, 2025-6pm EDT Jul 22, 2025

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Detailed Forecast


Late Afternoon
Variable winds 5 kt or less. Isolated showers. Seas around 1 ft.
Tonight
Variable winds 5 kt or less. Isolated showers before 8pm. Patchy fog between 3am and 4am, then Patchy fog after 5am. Seas around 1 ft.
Wednesday
Variable winds 5 kt or less. Widespread haze between 9am and noon. Patchy fog between 7am and 9am. Seas around 1 ft.
Wednesday Night
Variable winds 5 kt or less. Patchy fog. Seas around 1 ft.
Thursday
Variable winds 5 kt or less. A chance of showers between 10am and 2pm, then a chance of showers and thunderstorms after 2pm. Patchy fog before 9am. Seas around 1 ft.
Thursday Night
SSW wind around 10 kt becoming W after midnight. A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 9pm. Patchy fog. Seas around 1 ft.
Friday
WNW wind 5 to 10 kt becoming NNW in the afternoon. Patchy fog before 9am. Seas around 1 ft.
Friday Night
Variable winds 5 kt or less. Mostly clear. Seas around 1 ft.
Saturday
Variable winds 5 kt or less. Mostly sunny. Seas around 1 ft.

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: 42.9°N 70.79°W
Last Update: 1:48 pm EDT Jul 15, 2025
Forecast Valid: 5pm EDT Jul 15, 2025-6pm EDT Jul 22, 2025
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