Newcastle, Washington Weather
Newcastle, Washington — live current conditions, hourly and 7-day forecasts, NWS alerts, radar and satellite imagery, tide predictions, marine conditions and a solunar fishing forecast for Newcastle, King County.
Tides, marine forecast and fishing conditions near Newcastle. Tide source:
Full aviation weather for Newcastle is published on the Renton Municipal Airport (KRNT) page, 7 km away. It carries the current METAR decoded into plain language — surface wind, visibility, cloud layers and ceiling, temperature and dewpoint, and altimeter setting — alongside the raw observation as transmitted. 6 airfields within reach of Newcastle have their own pages, listed below.
The Terminal Aerodrome Forecast (TAF) is shown across its full validity period, with each change group broken out so you can see when conditions are expected to shift. Flight category is derived automatically — VFR, MVFR, IFR or LIFR — from reported ceiling and visibility, with runway details and field elevation alongside. Observations update roughly hourly and forecasts several times a day.
Other airports near Newcastle: King County International Airport - Boeing Field (KBFI) 11 km · Seattle–Tacoma International Airport (KSEA) 15 km · Auburn Municipal Airport (KS50) 24 km · Seattle Paine Field International Airport (KPAE) 42 km · Tacoma Narrows Airport (KTIW) 44 km
Conditions reported at KRNT describe the airfield itself. Weather 7 km away can differ, particularly in terrain or near the coast. For conditions at Newcastle specifically, see the current conditions and forecast above.
About Newcastle, Washington
Newcastle rests on slopes that tumble towards the broad, shimmering expanse of Lake Washington, its avenues tracing the generous contours of the land. It lies 3.8 miles south-east of Mercer Island, WA (from Mercer Island, WA: bearing 125°T), and is situated 9.4 miles east-south-east of Seattle. The air here, especially as the day begins to soften towards evening, carries a cool, damp kiss from the water, a scent of pine needles and distant, damp earth. Sunlight, when it breaks through the frequent Pacific Northwest clouds, can be startlingly bright, illuminating the verdant tapestry of firs and cedars that still cling to the steeper inclines, hinting at a wilder past just beyond the manicured lawns and quiet cul-de-sacs. The character of Newcastle is one of elegant repose, a place where the natural world has been thoughtfully integrated into the rhythm of modern life, a continuous conversation between the built environment and the ancient, breathing landscape. The story of Newcastle is deeply entwined with the earth beneath its feet, once a rich vein of coal that fueled the early growth of the region and drew a diverse population of miners to its steep hillsides. This industrial past, though largely dormant now, has left its imprint, a subtle resilience in the community's spirit. Today, Newcastle’s economy has broadened, embracing technology and a service sector that supports its growing residential base, yet the echoes of its mining heritage remain, a quiet reminder of the labor that shaped its foundations. The town’s connection to Lake Washington is paramount, offering residents not just scenic vistas but also recreational opportunities, a watery artery that pulses with life and connects Newcastle to the larger Puget Sound.
Live animated radar for Newcastle and surroundings — RainViewer.
NOAA GOES-16 GEOCOLOR — live animated loop updated every 10 minutes. Shows cloud cover, storm systems and weather patterns across the continental US.
Source: NOAA/NESDIS GOES-East · Public domain · Auto-updates on page reload
| Location | Newcastle, King County, Washington |
| Coordinates | 47.538989°N, 122.155677°W |
| Timezone | Pacific Time (America/Los_Angeles) |
| ZIP Code(s) | 98059 |
| Area Code | 206, 253 |
| Page generated | September 2026 |
| Weather data | Open-Meteo (open-source), NOAA National Weather Service |
About This Newcastle, Washington Weather Page
This page provides live weather conditions and forecasts for Newcastle, Washington, including current conditions, a 24-hour hourly forecast, 7-day outlook, NWS extended text forecast, precipitation radar and NOAA GOES-16 satellite imagery. Aviation weather — live METAR observations and TAF forecasts — is published separately on the pages for the nearest reporting airports, linked from the aviation section above. Additional sections may include tide predictions, wave height, wave direction and sea-surface temperature, a barometric pressure trend, and a solunar-based fishing forecast with a fishing-conditions rating for coastal localities, and soil temperature, crop weather and live USGS river gauge data for agricultural areas near a monitored waterway. All data updates automatically on every page visit.
Location data for Newcastle includes coordinates 47.538989°N, 122.155677°W, situated in King County. ZIP code 98059. Telephone area code: 206, 253. Timezone: Pacific Time (America/Los_Angeles).
Weather data is sourced from the NOAA National Weather Service (NWS) and the open-source Open-Meteo API. River and stream data is sourced from the USGS National Water Information System. Tide predictions are sourced from NOAA CO-OPS; marine and solunar data are modeled from Open-Meteo and public sunrise/moon calculations and should be treated as a general guide alongside on-the-water conditions. Radar is provided by RainViewer. Satellite imagery is sourced from NOAA/NESDIS GOES-East and is public domain.
