Mosquitoes in Seattle, WA

Floodwater and container mosquitoes are active and building toward the summer peak. Aedes vexans (the floodwater biter) surges about a week after heavy rain, and the Asian tiger mosquito is out biting during the day around homes. Early summer is when nuisance biting takes off.

Mosquitoes breed in standing water, so a town's risk tracks how much of that it holds. Seattle is 0% wetland and marsh, 47% open water, and 54% developed across its 84 sq mi, home to about 755,078 people. That makes it the 2nd-wettest of the 59 towns in King County. Marshes and floodplains breed the floodwater and cattail mosquitoes; developed areas breed the house mosquito in storm-drain catch basins and backyard containers.

The single biggest thing a homeowner controls is standing water: empty anything that holds it, keep gutters clear, and change bird baths weekly. A licensed mosquito service handles the breeding sites you can't reach and treats the shady resting spots where adults wait out the day.

Do I need mosquito control in Seattle?

Mosquito activity in Seattle is moderate today (35/100). Mosquitoes are out, especially at dawn and dusk and in shady, humid corners. A seasonal treatment plan keeps numbers down before peak weeks hit.

Professional mosquito control in Seattle usually pairs a barrier treatment, misted onto shrubs, tall grass, and shady borders where adults rest, with larval control that targets standing water and catch basins so new broods never hatch. Treatments are typically applied every three to four weeks through the season by a licensed company.

How much does mosquito control cost in Seattle?

Most homeowners pay about $80 to $150 per visit for professional mosquito barrier spraying, or roughly $350 to $600 for a full season of treatments, depending on lot size and how much shade and standing water the property has. Quotes are free, so it costs nothing to get a real number for your yard.

Floodwater and container mosquitoes are active and building toward the summer peak. In Seattle, today's mosquito risk reads moderate (35/100). Mosquitoes are out, mostly around dawn and dusk. Use repellent in the evening and tip out any standing water around the yard.