Hazardous Coastal Conditions for the Mid-Atlantic; Storm System Approaching Southern Alaska

A Nor'easter will create hazardous marine and coastal conditions along the Mid-Atlantic coast through mid-week, with significant coastal flooding and beach erosion possible. Meanwhile, another strong storm system is forecast to bring high winds and heavy precipitation to portions of southern Alaska. Elsewhere, relatively benign weather is expected through the first half of the work week. Read More >

Current conditions at

Boeing Field - King County International Airport (KBFI)

Lat: 47.54548°NLon: 122.3147°WElev: 20.0ft.

Clear

57°F

14°C

Humidity 62%
Wind Speed NW 6 MPH
Barometer 30.03 in (1016.93 mb)
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Last update 18 Oct 04:15 PM PDT
Extended Forecast for

Mercer Island WA

  • Tonight

    Tonight: Partly cloudy during the early evening, then becoming cloudy, with a low around 48. North wind around 5 mph becoming calm  in the evening.

    Low: 48 °F

    Becoming
    Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 60. Calm wind.

    High: 60 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Cloudy, then gradually becoming partly cloudy, with a low around 49. Calm wind becoming north northeast around 5 mph after midnight.

    Low: 49 °F

    Decreasing
    Clouds

  • Tuesday

    Tuesday: Mostly sunny, with a high near 60. North northeast wind 6 to 9 mph.

    High: 60 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 48. Northeast wind 3 to 7 mph.

    Low: 48 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 63.

    High: 63 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 47.

    Low: 47 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 59.

    High: 59 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: A chance of showers.  Mostly cloudy, with a low around 46.

    Low: 46 °F

    Chance
    Showers

Detailed Forecast

Tonight
Partly cloudy during the early evening, then becoming cloudy, with a low around 48. North wind around 5 mph becoming calm in the evening.
Monday
Mostly cloudy, with a high near 60. Calm wind.
Monday Night
Cloudy, then gradually becoming partly cloudy, with a low around 49. Calm wind becoming north northeast around 5 mph after midnight.
Tuesday
Mostly sunny, with a high near 60. North northeast wind 6 to 9 mph.
Tuesday Night
Mostly clear, with a low around 48. Northeast wind 3 to 7 mph.
Wednesday
Sunny, with a high near 63.
Wednesday Night
Partly cloudy, with a low around 47.
Thursday
Mostly cloudy, with a high near 59.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 46.
Friday
A slight chance of showers. Partly sunny, with a high near 58.
Friday Night
A slight chance of showers. Partly cloudy, with a low around 43.
Saturday
A slight chance of showers. Mostly cloudy, with a high near 57.
Saturday Night
A slight chance of showers. Mostly cloudy, with a low around 44.
Sunday
A slight chance of showers. Partly sunny, with a high near 58.
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ABOUT THIS FORECAST

 
Point Forecast:
Mercer Island WA
 47.58°N 122.25°W (Elev. 105 ft)
11:25 am PDT Oct 18, 2026
4pm PDT Oct 18, 2026-6pm PDT Oct 25, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database