Georgia’s warm, humid climate makes it one of the more mosquito-heavy states in the southeastern U.S., with activity starting as early as February near the coast and lasting through September or even November depending on the region. The state is home to dozens of mosquito species, but a handful cause most of the bites and carry the diseases worth knowing about.
When Mosquito Season Starts and Peaks
In most of Georgia, mosquitoes become active in March as temperatures consistently stay above 50°F. The peak runs from May through September, when heat and summer rainfall create ideal breeding conditions. In southern Georgia and along the coast, the season can stretch from February into November, with June through October being the worst months. Coastal counties with tidal marshes and standing water see some of the heaviest populations in the state.
A warm, wet spring accelerates everything. Mosquitoes breed in standing water, and Georgia’s frequent afternoon thunderstorms from June through August create fresh breeding sites every few days. Even a bottle cap’s worth of water can support larvae. Dry spells offer temporary relief, but populations rebound quickly after rain.
Species That Bite Most Often
Two species cause the majority of backyard misery in Georgia: the Asian tiger mosquito and the yellow fever mosquito. Both breed in artificial containers like old tires, rain barrels, buckets, flower pot saucers, and clogged gutters. Unlike marsh mosquitoes that fly in from a distance, these two develop right on your property, often within a few dozen feet of where they bite you.
The Asian tiger mosquito is the more widespread of the two. It’s recognizable by the bold white stripe down the center of its back and white-banded legs. It bites aggressively during the daytime, especially in the morning and late afternoon, which makes it harder to avoid than species that feed mainly at dusk. The yellow fever mosquito looks similar but is slightly smaller and tends to stay closer to buildings. Both prefer shaded areas and rarely fly far from where they hatched.
Culex mosquitoes, the common house mosquitoes, are the other major group. These are the ones that whine around your bedroom at night. They breed in ditches, storm drains, and any stagnant water with organic matter. Culex species are the primary carriers of West Nile virus in Georgia.
Mosquito-Borne Diseases in Georgia
West Nile virus is the most common mosquito-transmitted disease reported in Georgia. Between 2018 and 2022, the Georgia Department of Public Health recorded 81 human cases. The virus primarily circulates among birds and gets passed to people when a Culex mosquito feeds on an infected bird and then bites a human. Most people who contract West Nile never develop symptoms. Those who do typically experience fever, headache, and body aches that resolve on their own. In rare cases, the virus causes serious neurological illness.
Eastern equine encephalitis, often called “Triple E,” is far rarer but far more dangerous. Georgia reported 4 human cases between 2018 and 2022. The virus follows a similar bird-to-mosquito-to-human cycle. Most infected people show no symptoms, but when the virus reaches the brain, it can cause seizures, confusion, and coma. Roughly one-third of people who develop severe EEE die from it, and many survivors have lasting neurological damage. There is no vaccine for humans, though vaccines are available for horses, which are especially vulnerable.
The risk of contracting either disease from any single mosquito bite is low, but both viruses are present in Georgia every year, particularly from midsummer through early fall when mosquito populations and viral activity peak simultaneously.
Reducing Mosquitoes in Your Yard
Because the most common biting species in Georgia breed in small containers right on your property, eliminating standing water is the single most effective thing you can do. The University of Georgia Extension emphasizes that conventional adult spraying is difficult to use effectively against daytime-biting species like the Asian tiger mosquito, making larval habitat removal the best option. In practical terms, that means this is your problem to solve, not something a county spray truck will fix.
Walk your property once a week and dump, drain, or cover anything holding water:
- Tires: Remove old tires entirely or drill drainage holes in those used as playground equipment.
- Containers: Flip over buckets, wheelbarrows, and flower pot saucers. Empty and refill birdbaths and pet bowls every few days.
- Rain barrels: Cover them with fine mesh screening so mosquitoes can’t reach the water surface.
- Gutters: Clean them regularly so water doesn’t pool in sagging sections or leaf clogs.
- Tarps and covers: Anything draped over firewood, boats, or grills collects pockets of water after rain.
For water features you can’t drain, like ornamental ponds, mosquito dunks containing a naturally occurring bacteria that kills larvae are available at most hardware stores. They’re safe for fish, pets, and wildlife. Keeping the water moving with a pump or fountain also discourages egg-laying.
Yard maintenance matters too. Mosquitoes rest in dense vegetation during the heat of the day. Trimming overgrown shrubs, mowing tall grass, and reducing heavy shade near seating areas makes your yard less hospitable.
Choosing an Effective Repellent
EPA-registered repellents with proven active ingredients are the most reliable personal protection. Four ingredients have the strongest track record:
- DEET: The most widely tested repellent ingredient. Products with 20 to 30 percent concentration provide hours of protection. Going above 50 percent doesn’t work any better or longer.
- Picaridin: A synthetic compound modeled after a molecule found in black pepper. It works comparably to DEET but has almost no odor and feels less oily on skin.
- Oil of lemon eucalyptus (OLE): A plant-derived option that performs well in testing. Not safe for children under 3. This is not the same as pure lemon eucalyptus essential oil, which is not effective as a repellent.
- IR3535: A synthetic ingredient used widely in Europe, available in several U.S. products. Generally well tolerated on skin.
All four are safe for pregnant women and children when used as directed, with the exception of OLE for kids under 3. Apply repellent to exposed skin and over clothing. If you’re also using sunscreen, apply sunscreen first and repellent second.
For your yard, fans on porches and patios are surprisingly effective. Mosquitoes are weak fliers, and even a moderate breeze disrupts their ability to land and feed. Citronella candles and ultrasonic devices, by contrast, have performed poorly in independent testing.
Timing Your Outdoor Activity
Georgia’s most aggressive backyard mosquitoes, the Asian tiger and yellow fever species, bite primarily during daylight hours, with peak activity in the early morning and late afternoon. This is the opposite of what many people expect. If you’re gardening, exercising, or grilling during those windows, repellent and long sleeves make a noticeable difference.
Culex mosquitoes, the West Nile carriers, feed from dusk through dawn. Evening cookouts and early morning walks in areas near standing water carry more disease risk than midday activity. Wearing light-colored clothing helps, since mosquitoes are more attracted to dark colors, and loose-fitting long sleeves and pants provide a physical barrier that repellent alone doesn’t.