Current Conditions

Mercer Island, Washington

60°F16°C
Clear

Wind

S 3 mph5 km/h

Humidity

89%

Cloud Cover

31%

As of Thursday, August 13, 2026 at 4:34 AM PDT

Today's Outlook

Day

Partly cloudy and warm, with a high of 78°F26°C and morning low of 62°F17°C. Light wind from the W around 3 mph5 km/h.

Night

Mostly clear, with a low around 60°F16°C. Light wind from the SE around 3 mph5 km/h.

7-Day Forecast

DayConditionHigh (°F)Low (°F)Precip (mm)Cloud Cover (%)Wind (mph)
ClearHigh 78°F26°CLow 60°F16°CPrecip 0 in0 mmCloud 26%Wind WSW 3 mph5 km/hThursday: Partly cloudy and warm, with a high of 78°F26°C and morning low of 62°F17°C. Light wind from the W around 3 mph5 km/h. Thursday Night: Mostly clear, with a low around 60°F16°C. Light wind from the SE around 3 mph5 km/h.
ClearHigh 77°F25°CLow 60°F16°CPrecip 0 in0 mmCloud 37%Wind SW 4 mph6 km/hFriday: Mostly cloudy and warm, with a high of 77°F25°C and morning low of 62°F17°C. Light wind from the SW around 4 mph7 km/h. Friday Night: Mostly clear, with a low around 60°F16°C. Light wind from the SSW around 4 mph6 km/h.
Partly CloudyHigh 77°F25°CLow 61°F16°CPrecip 0 in0.1 mm2%Cloud 61%Wind SW 3 mph5 km/hSaturday: Mostly cloudy and warm, with a high of 77°F25°C and morning low of 63°F17°C. Light wind from the SW around 3 mph5 km/h. Saturday Night: Mostly cloudy, with a low around 61°F16°C. Light wind from the SW around 3 mph5 km/h.
Partly CloudyHigh 76°F24°CLow 60°F16°CPrecip 0 in0.1 mm1%Cloud 67%Wind WNW 3 mph5 km/hSunday: Mostly cloudy and warm, with a high of 76°F24°C and morning low of 62°F17°C. Light wind from the W around 3 mph5 km/h. Sunday Night: Mostly cloudy, with a low around 60°F16°C. Light wind from the NW around 3 mph6 km/h.
Partly CloudyHigh 77°F25°CLow 60°F16°CPrecip 0 in0.1 mm2%Cloud 55%Wind NW 3 mph5 km/hMonday: Mostly cloudy and warm, with a high of 77°F25°C and morning low of 62°F16°C. Light wind from the WNW around 3 mph5 km/h. Monday Night: Mostly cloudy, with a low around 60°F16°C. Light wind from the NNE around 3 mph4 km/h.
Partly CloudyHigh 73°F23°CLow 61°F16°CPrecip 0.01 in0.3 mm8%Cloud 67%Wind SSW 4 mph7 km/hTuesday: Mostly cloudy and warm, with a high of 73°F23°C and morning low of 62°F16°C. Light wind from the SW around 4 mph7 km/h. Tuesday Night: Mostly cloudy, with a low around 61°F16°C. Light wind from the SSW around 4 mph6 km/h.
Partly CloudyHigh 75°F24°CLow 60°F16°CPrecip 0.01 in0.3 mm9%Cloud 52%Wind NW 3 mph6 km/hWednesday: Mostly cloudy and warm, with a high of 75°F24°C and morning low of 62°F17°C. Light wind from the NW around 4 mph6 km/h. Wednesday Night: Partly cloudy, with a low around 60°F16°C. Light wind from the NNE around 3 mph5 km/h.

15-Day Forecast

Day High Low Precip Cloud Cover Condition Wind
ThursdayAug 1378°F26°C60°F16°C0 in0 mm· —26%ClearWSW 3 mph5 km/h
FridayAug 1477°F25°C60°F16°C0 in0 mm· —37%ClearSW 4 mph6 km/h
SaturdayAug 1577°F25°C61°F16°C0 in0.1 mm· 2%61%Partly CloudySW 3 mph5 km/h
SundayAug 1676°F24°C60°F16°C0 in0.1 mm· 1%67%Partly CloudyWNW 3 mph5 km/h
MondayAug 1777°F25°C60°F16°C0 in0.1 mm· 2%55%Partly CloudyNW 3 mph5 km/h
TuesdayAug 1873°F23°C61°F16°C0.01 in0.3 mm· 8%67%Partly CloudySSW 4 mph7 km/h
WednesdayAug 1975°F24°C60°F16°C0.01 in0.3 mm· 9%52%Partly CloudyNW 3 mph6 km/h
ThursdayAug 2077°F25°C60°F15°C0.01 in0.2 mm· 5%39%ClearNNW 4 mph6 km/h
FridayAug 2177°F25°C61°F16°C0.02 in0.4 mm· 8%47%Partly CloudyWSW 5 mph7 km/h
SaturdayAug 2276°F25°C61°F16°C0.03 in0.8 mm· 13%51%DrizzleSW 5 mph8 km/h
SundayAug 2375°F24°C61°F16°C0.06 in1.5 mm· 22%46%DrizzleWSW 5 mph8 km/h
MondayAug 2476°F24°C60°F15°C0.03 in0.7 mm· 12%42%DrizzleNW 4 mph7 km/h
TuesdayAug 2576°F24°C59°F15°C0.02 in0.4 mm· 8%34%ClearNW 4 mph7 km/h
WednesdayAug 2676°F24°C59°F15°C0.02 in0.4 mm· 8%36%ClearWNW 4 mph6 km/h
ThursdayAug 2775°F24°C58°F15°C0.03 in0.7 mm· 11%36%DrizzleW 4 mph7 km/h

Nearby Cities

About This Forecast

This forecast is powered by WeatherMesh, the world's most advanced and accurate weather model powered by AI. WeatherMesh is built on proprietary data from WindBorne's Global Sounding Balloon constellation — the world's largest fleet of autonomous, long-duration weather balloons — collecting observations across 100% of Earth, including over oceans and remote regions where no other data exists.

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Coordinates: 47.5707°N, 122.2221°W·Elevation: 102m·Timezone: America/Los_Angeles·Population: 25,042