The Coastal Pest Calendar
Pest pressure here is seasonal and predictable. Knowing the pattern lets you get ahead of it.
Mild winters mean pests here never fully shut down — but they do follow a rhythm.
In colder regions there's a genuine off-season. On this coast, pressure eases in January and picks back up quickly. What changes through the year is which pest is the problem, and knowing that lets you prevent instead of react.
Winter — December to February
Quietest stretch, but not zero.
- Rodents are the main indoor issue. Anything that moved in during fall is now established and breeding in your walls or attic.
- Roaches and silverfish stay active indoors where it's warm and humid.
- Warm spells bring brief resurgences — ants and mosquitoes can reappear during a mild week.
Get ahead: This is the window to seal entry points and address crawlspace moisture, while activity is low.
Spring — March to May
The busiest transition of the year.
- Termite swarms. Eastern subterranean termites swarm roughly February through May, typically on warm days after rain. This is the season most people discover they have a problem.
- Ants surge as colonies become active, and heavy spring rain floods nests and pushes them indoors.
- Fire ant mounds appear across yards, especially after rain.
- Wasps begin nesting — single queens starting small nests under eaves.
- Mosquitoes start as temperatures climb and spring rain fills breeding sites.
Get ahead: Knock down starter wasp nests now, when it's one queen and not a colony. Get the termite inspection done during swarm season.
Spring is termite season, and it's the cheapest time to find out
A swarm near your home means a colony is established nearby. Finding that in March costs you an inspection. Finding it in three years costs you structural repair that insurance almost certainly won't cover.
Summer — June to August
Peak everything.
- Mosquitoes at maximum — heat plus afternoon thunderstorms refilling breeding sites constantly.
- Palmetto bugs most visible; heavy rain floods mulch beds and drains and pushes them indoors.
- Fleas and ticks peak, with pets bringing them inside.
- Formosan termites swarm later than Eastern subterraneans, generally May into June, often at dusk around lights.
- Fire ants highly active; mounds rebuild fast after mowing.
Get ahead: Standing water is the whole mosquito fight. Walk the property after rain and empty everything holding water.
Fall — September to November
The season people underestimate.
- Rodents move in. As nights cool, mice and rats look for warmth. In rural areas near Loris and Aynor, harvest pushes them out of fields at the same time.
- Yellow jackets turn aggressive — colonies are at maximum size while their food sources decline.
- Spiders most visible, having reached full size, and moving toward structures as it cools.
- Crickets and beetles push toward foundations.
- Armyworms can strip a lawn in days in late summer and early fall.
Get ahead: September is the month to seal gaps. A dime-sized opening is enough for a mouse, and exclusion now beats trapping in January.
Why Quarterly Service Is Timed, Not Just Scheduled
Four services a year isn't an arbitrary number — it's one per seasonal shift. Each visit targets what's actually happening at that point in the year rather than applying the same treatment four times.
Homes backing to woods or water often do better on bi-monthly, because the shorter interval keeps pressure from rebuilding between visits. That's most of Little River, Murrells Inlet, and the wooded edges of Carolina Forest.
The Short Version
- Winter: seal gaps, fix moisture
- Spring: termite inspection, knock down starter wasp nests
- Summer: eliminate standing water
- Fall: exclusion work before the first cold snap