Excessive Heat From the Midwest to Northeast Today; Heavy Rainfall Threat Increasing Along the western Gulf Coast

Heat Advisories, and in some areas, Excessive Heat Warnings, continue today as hot temperatures and high humidity combine to create dangerous conditions. A slow-moving cold front from the Northeast to the northern Rockies will be the focus for potentially heavy rainfall this week, while tropical moisture moving into the western Gulf Coast will lead to an increased flash flood threat.

For More Weather Information:

Gray/Portland, ME Local Forecast Office

25NM ENE Portsmouth NH

Marine Point Forecast

  • Tonight

    Heavy Rain

    SW 20kt

    Low: 64 °F

    Small Craft Advisory
    Small Craft Advisory

  • Tuesday

    Becoming Sunny

    NNW 10kt

    High: 74 °F

  • Tuesday


    NW 10kt

    Low: 56 °F

  • Wednesday


    Winds IncreasingS 10kt

    High: 67 °F

  • Wednesday

    Partly Cloudy

    SSW 15ktWinds Decreasing

    Low: 58 °F

  • Thursday


    N 10kt

    High: 63 °F

  • Thursday

    Mostly Clear

    Light Wind

    Low: 55 °F

  • Friday


    Winds IncreasingS 10kt

    High: 64 °F

  • Friday

    Mostly Clear

    S 15kt

    Low: 59 °F

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 7:46 pm EDT Jun 18, 2018
Forecast Valid: 9pm EDT Jun 18, 2018-6pm EDT Jun 25, 2018

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Detailed Forecast

Synopsis: ANZ100-191400- 752 PM EDT Mon Jun 18 2018 .Synopsis for Stonington ME to Merrimack River MA out to 25 NM... Showers and thunderstorms will cross the waters this evening ahead of a cold front that will move through the waters after midnight shifting winds to the northwest. High pressure will build into the region on Tuesday and persist into Wednesday before a cold front arrives Wednesday night. $$

SSW wind 15 to 20 kt becoming WSW after midnight. A chance of showers and thunderstorms before midnight, then a chance of showers between midnight and 5am. Some of the storms could produce heavy rain. Patchy fog after midnight. Seas 5 to 6 ft.
NNW wind around 10 kt. Partly sunny, then gradually becoming sunny. Seas 2 to 3 ft.
Tuesday Night
NW wind 5 to 10 kt. Clear. Seas around 2 ft.
W wind 5 to 8 kt becoming S 7 to 10 kt in the afternoon. Sunny. Seas 1 to 2 ft.
Wednesday Night
SSW wind 10 to 15 kt becoming NW 5 to 8 kt after midnight. Partly cloudy. Seas 3 to 4 ft.
N wind 5 to 10 kt becoming E in the afternoon. Sunny. Seas around 2 ft.
Thursday Night
Variable winds 5 kt or less. Mostly clear. Seas around 1 ft.
N wind 5 to 8 kt becoming S 7 to 10 kt in the afternoon. Sunny. Seas around 1 ft.
Friday Night
S wind 10 to 15 kt becoming SW after midnight. Mostly clear. Seas around 3 ft.

Winds and seas higher in and near tstms.


  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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Point Forecast: 43.18°N 70.24°W
Last Update: 7:46 pm EDT Jun 18, 2018
Forecast Valid: 9pm EDT Jun 18, 2018-6pm EDT Jun 25, 2018
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