Significant Storm Systems on Both the West and East Coast

A deep plume of moisture will bring several inches of rain to portions of the west coast, with the greatest amounts occurring in Southern California. There is significant threat of mud and debris flows from burn scars in those areas. Several feet of snow is also forecast across the western mountains. Another Nor'easter will bring snow and gusty winds to the Middle Atlantic and Northeast.

For More Weather Information:

Gray/Portland, ME Local Forecast Office

20NM ENE Portsmouth NH

Marine Point Forecast

  • Tonight


    WNW 15kt

    Low: 23 °F

    Small Craft Advisory
    Small Craft Advisory

  • Tuesday


    WNW 10kt
    < 1ft

    High: 37 °F

  • Tuesday

    Partly Cloudy

    Winds IncreasingNE 20kt
    Waves Building2ft

    Low: 27 °F

  • Wednesday

    Rain/Snow Likely

    NE 25kt
    Waves Building9ft

    High: 38 °F

  • Wednesday

    Rain/Snow Likely

    NNE 30kt
    Waves Building13ft

    Low: 33 °F

  • Thursday

    Chance Rain/Snow

    N 25ktWinds Decreasing
    13ftWaves Subsiding

    High: 40 °F

  • Thursday

    Mostly Cloudy

    NNW 15kt
    8ftWaves Subsiding

    Low: 32 °F

  • Friday

    Partly Sunny

    WNW 10ktWinds Decreasing

    High: 40 °F

  • Friday

    Mostly Cloudy

    N 10kt

    Low: 33 °F

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 6:54 pm EDT Mar 19, 2018
Forecast Valid: 9pm EDT Mar 19, 2018-6pm EDT Mar 26, 2018

View Nearby Observations

Detailed Forecast

Synopsis: ANZ100-200915- 304 PM EDT Mon Mar 19 2018 .Synopsis for Stonington ME to Merrimack River MA out to 25 NM... Gusty northwest flow will continue tonight. Low pressure is expected to pass south of the waters Wednesday into Thursday with gales possible. High pressure then builds in toward the weekend. $$

WNW wind 10 to 15 kt. Clear. Seas 1 to 2 ft.
WNW wind 5 to 10 kt becoming S in the afternoon. Sunny. Seas 1 ft or less.
Tuesday Night
Variable winds less than 5 kt becoming NE 15 to 20 kt in the evening. Winds could gust as high as 25 kt. Partly cloudy. Seas 1 ft or less building to 2 ft.
NE wind around 25 kt, with gusts as high as 35 kt. A chance of snow before 2pm, then rain and snow likely. Seas 6 ft building to 9 ft.
Wednesday Night
NNE wind around 30 kt, with gusts as high as 40 kt. Rain and snow likely, becoming all snow after 8pm. Seas 11 ft building to 13 ft.
N wind 22 to 25 kt decreasing to 20 to 23 kt in the afternoon. Winds could gust as high as 35 kt. A chance of rain and snow before noon, then a chance of rain between noon and 2pm. Seas 13 ft subsiding to 9 ft.
Thursday Night
NNW wind 10 to 15 kt, with gusts as high as 25 kt. Mostly cloudy. Seas 8 ft subsiding to 5 ft.
WNW wind 7 to 10 kt decreasing to 5 to 8 kt in the afternoon. Partly sunny. Seas 3 to 4 ft.
Friday Night
SW wind 5 to 10 kt becoming N after midnight. Mostly cloudy. Seas around 2 ft.


  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: 43.17°N 70.36°W
Last Update: 6:54 pm EDT Mar 19, 2018
Forecast Valid: 9pm EDT Mar 19, 2018-6pm EDT Mar 26, 2018
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