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Mercer Island, Washington Weather

Mercer Island, Washington — live current conditions, hourly and 7-day forecasts, NWS alerts, aviation weather, radar and satellite imagery, tides and marine conditions for Mercer Island, King County.

🌡️ Current Conditions
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24-Hour Forecast
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Current Conditions Detail
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7-Day Forecast
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🌊 Marine & Fishing

Tides, marine forecast and fishing conditions near Mercer Island. Nearest NOAA tide station:

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✈️ Aviation Weather

Flight conditions near Mercer Island — sourced from the FAA Aviation Weather Center. Nearest reporting station: locating…

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🌿 Air Quality
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NWS Extended Forecast
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📡 Precipitation Radar

Live animated radar for Mercer Island and surroundings — RainViewer.

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🛰️ Satellite Imagery

NOAA GOES-16 GEOCOLOR — live animated loop updated every 10 minutes. Shows cloud cover, storm systems and weather patterns across the continental US.

NOAA GOES-16 CONUS GEOCOLOR satellite animated loop
🛰️ GEOCOLOR loop 🌡️ Infrared (IR) 🌀 NHC Hurricane Satellite 🔗 NOAA Full Viewer

Source: NOAA/NESDIS GOES-East · Public domain · Auto-updates on page reload

🌙 Astronomy
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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.

LocationMercer Island, King County, Washington
Coordinates47.570655°N, 122.222067°W
TimezonePacific Time (America/Los_Angeles)
ZIP Code(s)98040
Area Code206, 253
Page generatedJune 2026
Weather dataOpen-Meteo (open-source), NOAA National Weather Service