Newcastle, WA Weather Forecast
King County, Washington
Live radar, warnings and storm tracking for Newcastle, with free alerts the moment it counts.
The next few hours
Taller, warmer bars mean heavier rain. Dotted means no reading for that hour.
Hour by hour
Sunrise and sunset
Next five days, scored 0 to 100The first day or two use the HRRR and NBM cloud layers. Later days only have total cloud, so treat them as a rough guide.
Know when sunset at this place will be worth a photo
We score every sunrise and sunset here from the cloud, haze and smoke forecast, and let you know when one is likely to light up. Sunrise the evening before, sunset a few hours ahead.
Seven-day outlook
Free alerts for Newcastle
Every NWS warning, pushed to your phone, inbox or webhook the moment it is issued.
Newcastle, WA at a glance
Newcastle is home to about 12,761 people in King County, across 4.4 square miles. It ranks 77th by population of 152 places in Washington with a forecast here. The nearest neighbour with its own forecast is Mercer Island, 4 miles away.
- County
- King County
- Population
- 12,761 2023 est.
- Land area
- 4.4 sq mi
- People per sq mi
- 2,877
- Forecast point
- 47.5315°N, 122.1656°W
How well can the network see Newcastle?
The nearest Doppler radar is KATX (Seattle/Tacoma, WA), to the NNW. Its lowest scan passes about 3,400 ft above Newcastle. Close enough to see rotation in the low part of a storm, where tornadoes form.
The closest weather station is KRNT (Renton Muni). Close enough that its readings are the conditions in town.
Forecasts near Newcastle
- Mercer Island, WA4 mi
- Renton, WA4 mi
- Bellevue, WA5 mi
- Issaquah, WA6 mi
- Tukwila, WA6 mi
- Clyde Hill, WA7 mi
- Sammamish, WA7 mi
- Medina, WA7 mi
Elsewhere in Washington
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