Mosquito larvae become adults in 5-7 days when it’s hot.

Mosquito larvae can develop into biting adults in as little as 5 to 7 days when the weather is warm (above 70°F or 21°C). At cooler temperatures, that timeline stretches to 2–4 weeks or more.

The whole lifecycle goes: egg → larva → pupa → adult. In warm water, the larval stage zips through because mosquitoes are cold-blooded — their metabolism speeds up with heat. Constant temps between 75–90°F are basically a fast-forward button. Hot, still water with a little organic matter? That’s prime spawning grounds.

The pupal stage only lasts about 2 days before the adult emerges. So if you see standing water, you’ve got about a week before that water starts launching new mosquitoes.

Drain it now. Not tomorrow.