61of 100

Today's score

Mosquitoes in National City, CA

San Diego County

High risk

Mosquitoes are active and biting. Use repellent, cover up at dawn and dusk, and clear any standing water around the yard.

Updated July 19, 2026

Season
Ramping up
Water/wetland
9%
Top species
Asian tiger mosquito

Right now

Latest reading
69°
Temperature
91%
Humidity
0.0"
Recent rain

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Know the evening before National City spikes.

7-day outlook

Risk recalculates daily from the local forecast.

Today
61
Mon
60
Tue
67
Wed
68
Thu
69
Fri
70
Sat
70

What's active right now

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.

Local mosquito habitat

Mosquitoes breed in standing water, so a town's risk tracks how much of that it holds. National City is 1% wetland and marsh, 8% open water, and 81% developed across its 7.35 sq mi, home to about 55,236 people. That makes it the 8th-wettest of the 51 towns in San Diego 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.

Mosquito control in National City, CA

Do I need mosquito control in National City?

Mosquito activity in National City is moderate today (61/100). 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 National City 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 National City?

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.

Get a free mosquito control quote

From a vetted local mosquito control company serving National City. No cost, no obligation.

Are mosquitoes bad in National City right now?

Floodwater and container mosquitoes are active and building toward the summer peak. In National City, today's mosquito risk reads high (61/100). Mosquitoes are active and biting. Use repellent, cover up at dawn and dusk, and clear any standing water around the yard.

Nearby towns

Mosquito pressure is local. Check the towns around you.