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Corpus Christi Mosquito Forecast

Today's mosquito activity in Corpus Christi, the week ahead, and what to do about it. Updated hourly.

Bite Index · Sunday, November 8

High

High mosquito activity in Corpus Christi today and climbing toward very high by Nov 14. Cover up or use repellent after 6 pm.

Bites within a few minutes outdoors at dusk. Repellent or long sleeves pay off.

Quieter than a typical November in Nueces County (usually around 66).

  • Only 0.2 in. of rain Oct 24–Nov 1, so few new breeding sites; what's biting is coming from irrigation, pools and creeks.
  • Two weeks averaging 76°F is ideal breeding weather: egg to biting adult in about a week.
  • Tonight: a 70°F evening, 19 mph wind that keeps them grounded, rain around dusk — average conditions for biting.

The week ahead

Each day's Bite Index, from this week's weather and the rain that is still hatching. Forecast days get less certain as the week goes on.

  1. Today
    49High79°/69°3.1 in
  2. Mon
    58High71°/62°0.2 in
  3. Tue
    60High73°/64°0.1 in
  4. Wed
    60High75°/70°dry
  5. Thu
    53High77°/69°dry
  6. Fri
    51High70°/61°dry
  7. Sat
    67V·High72°/63°dry

Protect tonight

Use repellent for any time outside after about 6 pm.

  1. 20% picaridin or 20–30% DEET for the evening; follow the label's reapplication window.
  2. Long sleeves and pants in light colors cut bites roughly in half on their own.
  3. Skip the yard work at dusk: the hour around sunset is the heaviest biting of the day.
Which repellent, and how much: DEET vs picaridinBest natural repellents

Why Corpus Christi's mosquitoes do what they do

Corpus Christi has the Gulf on one side, the bays and marshes on the other, and a steady sea breeze in between. The salt-marsh mosquitoes that come off the flats after a high tide or a tropical rain can fly miles into town, and the city's Vector Control program posts spraying routes by neighborhood through the season.

  • Salt-marsh Aedes: Oso Bay, the Nueces delta and the barrier-island flats produce huge broods after flooding tides and tropical rain.
  • Wind: the Coastal Bend's persistent 15–20 mph breeze grounds mosquitoes more evenings than anywhere else in Texas, and the index accounts for it.
  • Tropical systems: a single storm can mean weeks of elevated activity.
  • Year-round warmth: Nueces County rarely sees a mosquito-ending freeze.

A typical year in Nueces County

The long-run mosquito index by month from our season map (NOAA climate normals plus effort-corrected sightings). Today's Bite Index is the live version of this; the month you're in is marked.

  1. JJanuary: 31
  2. FFebruary: 30
  3. MMarch: 39
  4. AApril: 59
  5. MMay: 91
  6. JJune: 100
  7. JJuly: 95
  8. AAugust: 86
  9. SSeptember: 92
  10. OOctober: 86
  11. NNovember: 66
  12. DDecember: 44

Local surveillance and West Nile virus

The Bite Index measures nuisance biting, not disease. Nueces County's health department traps and tests mosquitoes through the season and publishes positive West Nile pools by ZIP code. When your ZIP has an active advisory, follow it regardless of today's number.

How the Bite Index is scored

The index is a model of conditions, not a mosquito count. Four weather factors are combined on a 0–100 scale, then scaled by the season. Every factor and today's value for it is listed here so you can check the number yourself. It uses the same temperature curve and rain logic as our county-level mosquito season map, which has been validated against effort-corrected sighting data across 41 states.

BBreeding pressure

Rain 7–14 days ago (0.2 in. between Oct 24 and Nov 1). Eggs need water to hatch, and at summer temperatures the egg-to-biting-adult cycle takes about a week, so today's mosquitoes are last week's rain. Cool weather stretches the window; hot dry days shrink it as shallow water evaporates.

Weight 40%
Today 0%

DDevelopment

The trailing two-week average temperature, on the same curve as our national season map: nothing below 50°F, full speed at 78–88°F, a small penalty in extreme heat.

Weight 25%
Today 93%

ATonight's activity

Whether the population that exists will actually fly and bite this evening: dusk temperature (65–85°F is ideal), wind (they stop flying around 10 mph), humidity, and rain around sunset.

Weight 25%
Today 50%

GGround truth

A nudge from local trap counts and reports when we have them. For Corpus Christi this is neutral today; the health department's surveillance is linked above and will feed this factor as we wire it in.

Weight 10%
Today neutral

SSeason gate

A multiplier from the calendar: fully open in the city's season months, half-open in the shoulder months, nearly closed in deep winter unless the week is warm. Below a 50°F weekly average the index is simply 0.

Weight ×
Today 100%

index = 100 × S × (0.40 × (0.2 + 0.8·B) + 0.25 × D + 0.25 × A + 0.10 × (0.5 + 0.5·G))

Bands: Low 0–20 · Moderate 21–40 · High 41–60 · Very High 61–80 · Severe 81–100. Weather is from Open-Meteo (observations and the 7-day forecast), refreshed hourly. The lag and temperature thresholds follow published work on Culex and Aedes development (Rueda et al. 1990; Cornell NRCC degree-day emergence; JAMCA 2024 on rainfall two to four weeks before trap peaks).

Questions people ask about mosquitoes in Corpus Christi

When is mosquito season in Corpus Christi?
Nearly all year. The biggest surges follow spring rains, tropical systems in late summer, and the fall cold-front rains; a calm, humid evening after any of those is the worst case.
Why are the mosquitoes so bad on calm evenings?
The Coastal Bend's constant wind usually keeps them grounded. When it drops below about 10 mph at dusk, the population that was already there comes out all at once, which is why the index weights wind heavily here.
Is West Nile virus a risk in Corpus Christi?
Yes. The health district detects West Nile in local pools most years and schedules spraying in response. Follow its advisories over this page, which measures nuisance biting.
Where does this forecast's data come from?
Open-Meteo weather for central Corpus Christi, scored with our documented model. It does not yet include tide data, which matters for salt-marsh broods, so treat big tides as an extra reason for caution.

Also covers Portland, Port Aransas, Padre Island, Flour Bluff, Robstown, Rockport, Oso Bay, North Beach: the forecast point is central Corpus Christi, and conditions within about 30 miles track it closely. Weather fetched Nov 8, 12:38 PM local time.

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