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Gray/Portland, ME Local Forecast Office

9NM ESE Portsmouth NH

Marine Point Forecast

[NOTICE]
    • Today

      Today:SE wind around 25 km/h becoming E in the afternoon. Winds could gust as high as 35 km/h. Rain likely, with thunderstorms also possible after 5pm.   Seas around 1 m.

      High: 11 °C

      SE 25km/h
      1m

    • Tonight

      Tonight:E wind 25 to 30 km/h, with gusts as high as 45 km/h. Rain and possibly a thunderstorm.   Seas around 1 m.

      Low: 8 °C

      E 30km/h
      1m

    • Friday

      Friday:NE wind 20 to 25 km/h decreasing to 15 to 20 km/h in the afternoon. Winds could gust as high as 35 km/h. Rain, mainly before 1pm.   Seas around 1 m.

      High: 10 °C

      NE 25km/h⇓
      1m

    • Friday Night

      Friday Night:NW wind 10 to 13 km/h becoming W 12 to 15 km/h after midnight. Cloudy during the early evening, then gradual clearing. Seas around 1 m.

      Low: 9 °C

      ⇑W 15km/h
      1m

    • Saturday

      Saturday:WSW wind 10 to 15 km/h becoming SSW 15 to 20 km/h in the afternoon. Sunny. Seas around 1 m.

      High: 14 °C

      ⇑SSW 20km/h
      1m

    • Saturday Night

      Saturday Night:SSW wind 20 to 23 km/h increasing to 22 to 25 km/h in the evening. Winds could gust as high as 35 km/h. Partly cloudy. Seas around 1 m.

      Low: 12 °C

      ⇑SSW 25km/h
      1m

    • Sunday

      Sunday:WSW wind around 20 km/h. A chance of showers between 11am and 2pm.   Seas around 1 m.

      High: 17 °C

      WSW 20km/h
      1m

    • Sunday Night

      Sunday Night:W wind 10 to 15 km/h becoming NNW after midnight. Mostly clear. Seas 1 m or less.

      Low: 11 °C

      W 15km/h
      < 1m

    • Monday

      Monday:NNE wind 10 to 13 km/h becoming SSE 12 to 15 km/h in the afternoon. Sunny. Seas 1 m or less.

      High: 13 °C

      ⇑SSE 15km/h
      < 1m


High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 6:20 am EDT May 14, 2026
Forecast Valid: 9am EDT May 14, 2026-6pm EDT May 20, 2026

View Nearby Observations

Detailed Forecast


Today
SE wind around 25 km/h becoming E in the afternoon. Winds could gust as high as 35 km/h. Rain likely, with thunderstorms also possible after 5pm. Seas around 1 m.
Tonight
E wind 25 to 30 km/h, with gusts as high as 45 km/h. Rain and possibly a thunderstorm. Seas around 1 m.
Friday
NE wind 20 to 25 km/h decreasing to 15 to 20 km/h in the afternoon. Winds could gust as high as 35 km/h. Rain, mainly before 1pm. Seas around 1 m.
Friday Night
NW wind 10 to 13 km/h becoming W 12 to 15 km/h after midnight. Cloudy during the early evening, then gradual clearing. Seas around 1 m.
Saturday
WSW wind 10 to 15 km/h becoming SSW 15 to 20 km/h in the afternoon. Sunny. Seas around 1 m.
Saturday Night
SSW wind 20 to 23 km/h increasing to 22 to 25 km/h in the evening. Winds could gust as high as 35 km/h. Partly cloudy. Seas around 1 m.
Sunday
WSW wind around 20 km/h. A chance of showers between 11am and 2pm. Seas around 1 m.
Sunday Night
W wind 10 to 15 km/h becoming NNW after midnight. Mostly clear. Seas 1 m or less.
Monday
NNE wind 10 to 13 km/h becoming SSE 12 to 15 km/h in the afternoon. Sunny. 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: 42.99°N 70.62°W
Last Update: 6:20 am EDT May 14, 2026
Forecast Valid: 9am EDT May 14, 2026-6pm EDT May 20, 2026
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