National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Flooding Possible in the Southwest U.S.; Coastal Storm to Impact the East

Heavy to excessive rainfall is expected today into Wednesday over New Mexico into far west Texas. Flash flooding and debris flows in wildfire burn areas will be possible. A strong coastal storm will develop off the Mid-Atlantic coast Wednesday, intensifying toward southern New England this weekend. Significant coastal flooding, strong rip currents, and beach erosion from high surf expected. Read More >

Current conditions at

Renton Municipal Airport (KRNT)

Lat: 47.49509°NLon: 122.21437°WElev: 23.0ft.

Clear

55°F

13°C

Humidity 82%
Wind Speed SE 3 MPH
Barometer 30.08 in (1018.63 mb)
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 23 Sep 12:00 AM PDT
Extended Forecast for

Newcastle WA

  • Overnight

    Overnight: Mostly cloudy, with a low around 52. South southeast wind around 5 mph.

    Low: 52 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Cloudy, then gradually becoming mostly sunny, with a high near 65. Light and variable wind.

    High: 65 °F

    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 50. North northeast wind 3 to 5 mph.

    Low: 50 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Mostly cloudy, with a high near 61. North northeast wind 3 to 5 mph.

    High: 61 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Rain. Low around 52. Light and variable wind. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 52 °F

    Rain

  • Friday

    Friday: Rain before 11am, then showers and possibly a thunderstorm after 11am. High near 59. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 59 °F

    Showers

  • Friday Night

    Friday Night: Rain likely before 11pm. Mostly cloudy, with a low around 49. Chance of precipitation is 60%.

    Low: 49 °F

    Rain Likely
    then Partly
    Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 62.

    High: 62 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 47.

    Low: 47 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 52. South southeast wind around 5 mph.
Wednesday
Cloudy, then gradually becoming mostly sunny, with a high near 65. Light and variable wind.
Wednesday Night
Increasing clouds, with a low around 50. North northeast wind 3 to 5 mph.
Thursday
Mostly cloudy, with a high near 61. North northeast wind 3 to 5 mph.
Thursday Night
Rain. Low around 52. Light and variable wind. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Friday
Rain before 11am, then showers and possibly a thunderstorm after 11am. High near 59. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Friday Night
Rain likely before 11pm. Mostly cloudy, with a low around 49. Chance of precipitation is 60%.
Saturday
Mostly sunny, with a high near 62.
Saturday Night
Mostly cloudy, with a low around 47.
Sunday
Partly sunny, with a high near 62.
Sunday Night
Partly cloudy, with a low around 48.
Monday
Partly sunny, with a high near 62.
Monday Night
A slight chance of rain. Mostly cloudy, with a low around 50.
Tuesday
A chance of rain. Mostly cloudy, with a high near 63.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WA
 47.52°N 122.17°W (Elev. 400 ft)
Last Update:
11:26 pm PDT Sep 22, 2026
Forecast Valid:
12am PDT Sep 23, 2026-6pm PDT Sep 29, 2026
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

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Chance of Precipitation