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Gray/Portland, ME Local Forecast Office

25NM ENE Portsmouth NH

Marine Point Forecast

[NOTICE]
    • Today

      Today:S wind around 25 km/h, with gusts as high as 35 km/h. Scattered showers and thunderstorms, then showers likely and possibly a thunderstorm after 5pm. Some of the storms could be severe.   Seas around 1 m.

      High: 21 °C

      S 25km/h
      1m

    • Tonight

      Tonight:SSW wind around 15 km/h becoming NW in the evening. Showers and thunderstorms likely, mainly before 8pm. Some of the storms could be severe.   Seas around 1 m.

      Low: 18 °C

      NW 15km/h
      1m

    • Monday

      Monday:NNW wind 15 to 20 km/h. Sunny. Seas around 1 m.

      High: 21 °C

      NNW 20km/h
      1m

    • Monday Night

      Monday Night:NNW wind 20 to 25 km/h, with gusts as high as 35 km/h. Mostly clear. Seas around 1 m.

      Low: 16 °C

      NNW 25km/h
      1m

    • Tuesday

      Tuesday:NNW wind 12 to 15 km/h becoming WSW 10 to 13 km/h in the afternoon. Sunny. Seas 1 m or less.

      High: 20 °C

      NNW 15km/h⇓
      < 1m

    • Tuesday Night

      Tuesday Night:SSW wind 10 to 15 km/h becoming WSW after midnight. Partly cloudy. Seas 1 m or less.

      Low: 17 °C

      SSW 15km/h
      < 1m

    • Wednesday

      Wednesday:SW wind 10 to 13 km/h becoming S 12 to 15 km/h in the afternoon. Sunny. Seas 1 m or less.

      High: 21 °C

      ⇑S 15km/h
      < 1m

    • Wednesday Night

      Wednesday Night:SSW wind around 25 km/h, with gusts as high as 35 km/h. Partly cloudy. Seas around 1 m.

      Low: 18 °C

      SSW 25km/h
      1m

    • Thursday

      Thursday:SSW wind around 25 km/h, with gusts as high as 40 km/h. Mostly sunny. Seas around 1 m.

      High: 23 °C

      SSW 25km/h
      1m


High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 6:21 am EDT Jul 20, 2025
Forecast Valid: 11am EDT Jul 20, 2025-6pm EDT Jul 26, 2025

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Detailed Forecast


Today
S wind around 25 km/h, with gusts as high as 35 km/h. Scattered showers and thunderstorms, then showers likely and possibly a thunderstorm after 5pm. Some of the storms could be severe. Seas around 1 m.
Tonight
SSW wind around 15 km/h becoming NW in the evening. Showers and thunderstorms likely, mainly before 8pm. Some of the storms could be severe. Seas around 1 m.
Monday
NNW wind 15 to 20 km/h. Sunny. Seas around 1 m.
Monday Night
NNW wind 20 to 25 km/h, with gusts as high as 35 km/h. Mostly clear. Seas around 1 m.
Tuesday
NNW wind 12 to 15 km/h becoming WSW 10 to 13 km/h in the afternoon. Sunny. Seas 1 m or less.
Tuesday Night
SSW wind 10 to 15 km/h becoming WSW after midnight. Partly cloudy. Seas 1 m or less.
Wednesday
SW wind 10 to 13 km/h becoming S 12 to 15 km/h in the afternoon. Sunny. Seas 1 m or less.
Wednesday Night
SSW wind around 25 km/h, with gusts as high as 35 km/h. Partly cloudy. Seas around 1 m.
Thursday
SSW wind around 25 km/h, with gusts as high as 40 km/h. Mostly sunny. Seas around 1 m.

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: 43.18°N 70.24°W
Last Update: 6:21 am EDT Jul 20, 2025
Forecast Valid: 11am EDT Jul 20, 2025-6pm EDT Jul 26, 2025
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