Mercer Island, Washington Weather
Mercer Island, Washington — live current conditions, hourly and 7-day forecasts, NWS alerts, aviation weather, radar and satellite imagery, tide predictions, marine conditions and a solunar fishing forecast for Mercer Island, King County.
Tides, marine forecast and fishing conditions near Mercer Island. Tide source:
Flight conditions near Mercer Island. Data source: locating…
About Mercer Island, Washington
Mercer Island rises from the deep, cool waters of Lake Washington, a verdant presence between the urban sprawls of Seattle and Bellevue. It lies 2.9 miles south-south-west of Bellevue, WA (from Bellevue, WA: bearing 200°T), and is situated 5.7 miles east-south-east of Seattle. Its undulating terrain, cloaked in Douglas fir and Western red cedar, slopes gently towards the water's edge, creating a mosaic of sun-dappled neighborhoods and secluded coves. The air here often carries the scent of damp earth and pine needles, a refreshing balm that mingles with the fainter, salt-tinged breeze from Puget Sound, even miles inland. The island’s character is one of quiet refinement, a place where manicured lawns meet wilder, forested pockets, and the distant hum of city life is softened by the rustle of leaves and the lapping of waves against its shores. The history of Mercer Island is deeply intertwined with its maritime setting, its shores having long been a gathering place for indigenous peoples before European settlement. Later, its development was spurred by the construction of bridges connecting it to the mainland, transforming it from a somewhat isolated retreat into a sought-after residential haven. The island’s economy, once reliant on logging and some agriculture, has largely shifted to service-based industries and the daily commute of its residents to the larger metropolitan centers. Today, Mercer Island is known for its excellent schools and its commitment to preserving its natural beauty, evident in its numerous parks and protected green spaces, offering a distinctively tranquil counterpoint to the bustling energy of its neighbors.
Live animated radar for Mercer Island 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 | Mercer Island, King County, Washington |
| Coordinates | 47.570655°N, 122.222067°W |
| Timezone | Pacific Time (America/Los_Angeles) |
| ZIP Code(s) | 98040 |
| Area Code | 206, 253 |
| Page generated | July 2026 |
| Weather data | Open-Meteo (open-source), NOAA National Weather Service |
About This Mercer Island, Washington Weather Page
This page provides live weather conditions and forecasts for Mercer Island, Washington, including current conditions, a 24-hour hourly forecast, 7-day outlook, NWS extended text forecast, real-time aviation weather (live METAR and TAF reports from the nearest reporting airport, with a modeled estimate shown when no station is in range), precipitation radar and NOAA GOES-16 satellite imagery. 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 Mercer Island includes coordinates 47.570655°N, 122.222067°W, situated in King County. ZIP code 98040. 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. Aviation data is sourced from aviationweather.gov (NOAA), with a modeled estimate used where no nearby reporting station is available. 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.
