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Gray/Portland, ME Local Forecast Office

3NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]
    • Today

      Today:SSE wind 15 to 18 kt increasing to 17 to 20 kt in the afternoon. Winds could gust as high as 40 kt. Showers likely before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers and possibly a thunderstorm after 2pm. Some of the storms could be severe.   Seas 1 ft or less.

      High: 68 °F

      ⇑SSE 20kt
      < 1ft

    • Tonight

      Tonight:SSW wind 10 to 15 kt becoming WSW after midnight. Winds could gust as high as 25 kt. Showers and thunderstorms likely before 8pm, then a slight chance of showers between 8pm and 9pm. Some of the storms could be severe.   Seas 1 ft or less.

      Low: 60 °F

      WSW 15kt
      < 1ft

    • Juneteenth

      Juneteenth:W wind around 15 kt, with gusts as high as 25 kt. Sunny. Seas 1 ft or less.

      High: 73 °F

      W 15kt
      < 1ft

    • Friday Night

      Friday Night:W wind around 10 kt, with gusts as high as 20 kt. Clear. Seas 1 ft or less.

      Low: 59 °F

      W 10kt
      < 1ft

    • Saturday

      Saturday:W wind around 15 kt, with gusts as high as 25 kt. Sunny. Seas 1 ft or less.

      High: 71 °F

      W 15kt
      < 1ft

    • Saturday Night

      Saturday Night:W wind around 10 kt. Partly cloudy. Seas 1 ft or less.

      Low: 58 °F

      W 10kt
      < 1ft

    • Sunday

      Sunday:Variable winds 5 kt or less. A chance of showers after 2pm.   Seas 1 ft or less.

      High: 69 °F

      Light Wind
      < 1ft

    • Sunday Night

      Sunday Night:Variable winds 5 kt or less. A chance of showers.   Seas around 1 ft.

      Low: 58 °F

      Light Wind
      1ft

    • Monday

      Monday:Variable winds 5 kt or less. A chance of showers.   Seas around 1 ft.

      High: 66 °F

      ⇑Light Wind
      1ft


High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 6:48 am EDT Jun 18, 2026
Forecast Valid: 10am EDT Jun 18, 2026-6pm EDT Jun 24, 2026

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Detailed Forecast


Today
SSE wind 15 to 18 kt increasing to 17 to 20 kt in the afternoon. Winds could gust as high as 40 kt. Showers likely before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers and possibly a thunderstorm after 2pm. Some of the storms could be severe. Seas 1 ft or less.
Tonight
SSW wind 10 to 15 kt becoming WSW after midnight. Winds could gust as high as 25 kt. Showers and thunderstorms likely before 8pm, then a slight chance of showers between 8pm and 9pm. Some of the storms could be severe. Seas 1 ft or less.
Juneteenth
W wind around 15 kt, with gusts as high as 25 kt. Sunny. Seas 1 ft or less.
Friday Night
W wind around 10 kt, with gusts as high as 20 kt. Clear. Seas 1 ft or less.
Saturday
W wind around 15 kt, with gusts as high as 25 kt. Sunny. Seas 1 ft or less.
Saturday Night
W wind around 10 kt. Partly cloudy. Seas 1 ft or less.
Sunday
Variable winds 5 kt or less. A chance of showers after 2pm. Seas 1 ft or less.
Sunday Night
Variable winds 5 kt or less. A chance of showers. Seas around 1 ft.
Monday
Variable winds 5 kt or less. A chance of showers. Seas around 1 ft.

*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: 6:48 am EDT Jun 18, 2026
Forecast Valid: 10am EDT Jun 18, 2026-6pm EDT Jun 24, 2026
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