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Gray/Portland, ME Local Forecast Office

8NM SE Portsmouth NH

Marine Point Forecast

[NOTICE]
    • Today

      Today:WSW wind 5 to 10 kt becoming S in the afternoon. Mostly sunny. Seas 3 ft subsiding to 1 ft.

      High: 79 °F

      S 10kt
      3ftWaves Subsiding

    • Tonight

      Tonight:SSW wind 5 to 10 kt. A slight chance of showers and thunderstorms before midnight.  Areas of fog after 5am.  Seas around 2 ft.

      Low: 68 °F

      SSW 10kt
      2ft

    • Friday

      Friday:Variable winds 5 kt or less. Showers likely and possibly a thunderstorm before 3pm, then a chance of showers and thunderstorms between 3pm and 5pm, then showers likely and possibly a thunderstorm after 5pm.   Seas 1 to 2 ft.

      High: 70 °F

      Light Wind
      1-2ft

    • Friday Night

      Friday Night:Variable winds 5 kt or less. A chance of showers before 7pm.   Seas around 1 ft.

      Low: 66 °F

      Light Wind
      1ft

    • Saturday

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

      High: 72 °F

      Light Wind
      1ft

    • Saturday Night

      Saturday Night:Variable winds 5 kt or less. Partly cloudy. Seas around 1 ft.

      Low: 65 °F

      Light Wind
      1ft

    • Sunday

      Sunday:Variable winds 5 kt or less. Sunny. Seas around 1 ft.

      High: 71 °F

      Light Wind
      1ft

    • Sunday Night

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

      Low: 65 °F

      Light Wind
      1ft

    • Monday

      Monday:SW wind 5 to 8 kt becoming S 7 to 10 kt in the afternoon. Sunny. Seas around 1 ft.

      High: 75 °F

      ⇑S 10kt
      1ft


High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 1:33 am EDT Jul 9, 2026
Forecast Valid: 5am EDT Jul 9, 2026-6pm EDT Jul 15, 2026

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Detailed Forecast


Today
WSW wind 5 to 10 kt becoming S in the afternoon. Mostly sunny. Seas 3 ft subsiding to 1 ft.
Tonight
SSW wind 5 to 10 kt. A slight chance of showers and thunderstorms before midnight. Areas of fog after 5am. Seas around 2 ft.
Friday
Variable winds 5 kt or less. Showers likely and possibly a thunderstorm before 3pm, then a chance of showers and thunderstorms between 3pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Seas 1 to 2 ft.
Friday Night
Variable winds 5 kt or less. A chance of showers before 7pm. Seas around 1 ft.
Saturday
Variable winds 5 kt or less. Mostly sunny. Seas around 1 ft.
Saturday Night
Variable winds 5 kt or less. Partly cloudy. Seas around 1 ft.
Sunday
Variable winds 5 kt or less. Sunny. Seas around 1 ft.
Sunday Night
Variable winds 5 kt or less. Mostly clear. Seas around 1 ft.
Monday
SW wind 5 to 8 kt becoming S 7 to 10 kt in the afternoon. 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: 42.99°N 70.62°W
Last Update: 1:33 am EDT Jul 9, 2026
Forecast Valid: 5am EDT Jul 9, 2026-6pm EDT Jul 15, 2026
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