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Gray/Portland, ME Local Forecast Office

18NM NNE Portsmouth NH

Marine Point Forecast

[NOTICE]
    • Today

      Today:SW wind 5 to 10 kt. Sunny. Seas 1 ft or less.

      High: 61 °F

      SW 10kt
      < 1ft

    • Tonight

      Tonight:Variable winds 5 kt or less. A slight chance of rain after 3am.   Seas 1 ft or less.

      Low: 35 °F

      Light Wind
      < 1ft

    • Wednesday

      Wednesday:ENE wind around 10 kt, with gusts as high as 20 kt. Rain likely, mainly after 5pm.  Patchy dense fog between 1pm and 3pm, then Areas of dense fog after 4pm.  Seas 1 ft or less.

      High: 45 °F

      ENE 10kt
      < 1ft

    • Wednesday Night

      Wednesday Night:Variable winds 5 kt or less. Rain likely, mainly between 10pm and 2am.  Areas of dense fog.  Seas 1 ft or less.

      Low: 36 °F

      Light Wind
      < 1ft

    • Thursday

      Thursday:SW wind around 10 kt becoming W in the afternoon. A chance of rain before 5pm.  Patchy fog before 9am.  Seas 1 ft or less.

      High: 53 °F

      W 10kt
      < 1ft

    • Thursday Night

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

      Low: 24 °F

      Light Wind
      < 1ft

    • Friday

      Friday:W wind 5 to 10 kt becoming S in the afternoon. Mostly sunny. Seas 1 ft or less.

      High: 42 °F

      S 10kt
      < 1ft

    • Friday Night

      Friday Night:S wind around 10 kt. A chance of snow before 11pm, then rain likely.   Seas 1 ft or less.

      Low: 30 °F

      S 10kt
      < 1ft

    • Saturday

      Saturday:W wind around 10 kt, with gusts as high as 20 kt. A chance of rain.   Seas 1 ft or less.

      High: 45 °F

      W 10kt
      < 1ft


High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 6:45 am EDT Mar 10, 2026
Forecast Valid: 11am EDT Mar 10, 2026-6pm EDT Mar 16, 2026

View Nearby Observations

Detailed Forecast


Today
SW wind 5 to 10 kt. Sunny. Seas 1 ft or less.
Tonight
Variable winds 5 kt or less. A slight chance of rain after 3am. Seas 1 ft or less.
Wednesday
ENE wind around 10 kt, with gusts as high as 20 kt. Rain likely, mainly after 5pm. Patchy dense fog between 1pm and 3pm, then Areas of dense fog after 4pm. Seas 1 ft or less.
Wednesday Night
Variable winds 5 kt or less. Rain likely, mainly between 10pm and 2am. Areas of dense fog. Seas 1 ft or less.
Thursday
SW wind around 10 kt becoming W in the afternoon. A chance of rain before 5pm. Patchy fog before 9am. Seas 1 ft or less.
Thursday Night
Variable winds 5 kt or less. Partly cloudy. Seas 1 ft or less.
Friday
W wind 5 to 10 kt becoming S in the afternoon. Mostly sunny. Seas 1 ft or less.
Friday Night
S wind around 10 kt. A chance of snow before 11pm, then rain likely. Seas 1 ft or less.
Saturday
W wind around 10 kt, with gusts as high as 20 kt. A chance of rain. Seas 1 ft 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: 43.31°N 70.57°W
Last Update: 6:45 am EDT Mar 10, 2026
Forecast Valid: 11am EDT Mar 10, 2026-6pm EDT Mar 16, 2026
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