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Gray/Portland, ME Local Forecast Office

3NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]
    • Tonight

      Tonight:SSE wind 7 to 10 km/h decreasing to 5 to 8 km/h after midnight. Patchy fog after 3am.  Seas 1 m or less.

      Low: 18 °C

      SSE 10km/h⇓
      < 1m

    • Saturday

      Saturday:S wind 5 to 8 km/h becoming SE 10 to 15 km/h in the afternoon. A slight chance of showers and thunderstorms after 2pm.  Areas of fog before 10am.  Seas 1 m or less.

      High: 21 °C

      ⇑SE 15km/h
      < 1m

    • Saturday Night

      Saturday Night:SSE wind 10 to 15 km/h. Mostly cloudy. Seas 1 m or less.

      Low: 17 °C

      SSE 15km/h
      < 1m

    • Sunday

      Sunday:SSE wind 10 to 13 km/h increasing to 12 to 15 km/h in the afternoon. Winds could gust as high as 30 km/h. Partly sunny. Seas 1 m or less.

      High: 21 °C

      ⇑SSE 15km/h
      < 1m

    • Sunday Night

      Sunday Night:S wind 12 to 15 km/h decreasing to 10 to 13 km/h after midnight. Winds could gust as high as 30 km/h. Patchy fog after 1am.  Seas 1 m or less.

      Low: 17 °C

      S 15km/h⇓
      < 1m

    • Monday

      Monday:SSE wind 10 to 15 km/h. A chance of showers and thunderstorms after 2pm.  Patchy fog before 7am.  Seas 1 m or less.

      High: 23 °C

      SSE 15km/h
      < 1m

    • Monday Night

      Monday Night:S wind around 10 km/h becoming WSW after midnight. A chance of showers and thunderstorms before 8pm.   Seas 1 m or less.

      Low: 18 °C

      S 10km/h
      < 1m

    • Tuesday

      Tuesday:W wind 5 to 10 km/h becoming S in the afternoon. Mostly sunny. Seas 1 m or less.

      High: 27 °C

      S 10km/h
      < 1m

    • Tuesday Night

      Tuesday Night:S wind around 10 km/h becoming W after midnight. Mostly clear. Seas 1 m or less.

      Low: 19 °C

      S 10km/h
      < 1m


High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 8:05 pm EDT Jul 11, 2025
Forecast Valid: 9pm EDT Jul 11, 2025-6pm EDT Jul 18, 2025

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Detailed Forecast


Tonight
SSE wind 7 to 10 km/h decreasing to 5 to 8 km/h after midnight. Patchy fog after 3am. Seas 1 m or less.
Saturday
S wind 5 to 8 km/h becoming SE 10 to 15 km/h in the afternoon. A slight chance of showers and thunderstorms after 2pm. Areas of fog before 10am. Seas 1 m or less.
Saturday Night
SSE wind 10 to 15 km/h. Mostly cloudy. Seas 1 m or less.
Sunday
SSE wind 10 to 13 km/h increasing to 12 to 15 km/h in the afternoon. Winds could gust as high as 30 km/h. Partly sunny. Seas 1 m or less.
Sunday Night
S wind 12 to 15 km/h decreasing to 10 to 13 km/h after midnight. Winds could gust as high as 30 km/h. Patchy fog after 1am. Seas 1 m or less.
Monday
SSE wind 10 to 15 km/h. A chance of showers and thunderstorms after 2pm. Patchy fog before 7am. Seas 1 m or less.
Monday Night
S wind around 10 km/h becoming WSW after midnight. A chance of showers and thunderstorms before 8pm. Seas 1 m or less.
Tuesday
W wind 5 to 10 km/h becoming S in the afternoon. Mostly sunny. Seas 1 m or less.
Tuesday Night
S wind around 10 km/h becoming W after midnight. Mostly clear. Seas 1 m 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: 8:05 pm EDT Jul 11, 2025
Forecast Valid: 9pm EDT Jul 11, 2025-6pm EDT Jul 18, 2025
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