Why Jamaica's pest activity has a calendar
Jamaican pest activity isn't random. It follows our weather patterns — the dry season, the rainy season, hurricane season, cooler months. Different pests peak at different times. Knowing what to expect month-by-month means you can get ahead of problems instead of reacting after you've already had the sleepless nights or the kitchen invasion.
Here's the Sim T's Pest Control & Fumigation seasonal calendar based on 15+ years of field experience across the island.
January — February: Rodent peak season
Cooler, drier weather drives rats and mice indoors looking for food and shelter. This is when most "there's a rat in the roof" calls come in.
- Watch for: scratching sounds at night, droppings in cupboards, gnaw marks on food packaging
- Do now: seal exterior entry points, store food in sealed containers, consider a rodent control programme if signs appear
March — April: Termite swarm season begins
As the weather warms, termite colonies release winged reproductives (swarmers) to start new colonies. If you see them, your property or your neighbour's already has an established colony.
- Watch for: flying "ants" near windows and lights (usually after warm, humid days), discarded wings in piles, mud tubes on foundations
- Do now: inspect the foundation perimeter, book a termite inspection if you see any signs — don't spray swarmers yourself
May — June: Ant invasion season
Early rains drive outdoor ant colonies indoors looking for dry nesting sites and reliable food sources. Sugar ants in the kitchen, carpenter ants in wooden structures.
- Watch for: trails of ants into the kitchen, small piles of sawdust-like material near wood (carpenter ants), ants coming through outlets or window frames
- Do now: clean up every crumb and spill, store sweet food in sealed containers, treat trails with professional bait, not spray
June — November: Mosquito and dengue season
The rainy season is prime mosquito time. Breeding sites multiply, and dengue, chikungunya and Zika risk rises. This is the longest "stay vigilant" window of the year.
- Watch for: any standing water around the property, mosquitoes active in your yard during daytime, cases of fever in the community
- Do now: weekly yard walk to dump standing water (see our rainy-season guide), consider monthly yard treatments, review our dengue protection guide
July — August: Cockroach peak
Hot, humid weather combined with heavy rain drives cockroach reproduction into high gear. German cockroaches in kitchens, American cockroaches (palmetto bugs) from drains and outdoors.
- Watch for: live roaches during the day (sign of heavy infestation), droppings that look like coffee grounds, a sweet musty smell in the kitchen
- Do now: fix any water leaks (roaches need water more than food), store food in sealed containers, call for professional treatment if you see them in daytime — see our kitchen roach guide
August — October: Hurricane season preparation
Hurricane season has its own pest implications. Flooding drives rodents and insects to higher ground (your house). Damaged roofs and walls create entry points. Debris creates breeding and harbourage sites.
- Watch for: any structural damage that creates new pest entry points, standing water from flooding that needs draining fast
- Do now: after any storm, do a full perimeter inspection, drain pooled water within 24 hours, repair screens and door sweeps immediately
November — December: Stored-product pest season
Holiday baking and bulk food purchases bring stored-product pests out of hiding. Weevils in flour and rice, Indian meal moths in cereals and dry goods.
- Watch for: small moths flying in the pantry, webbing in corners of dry-goods containers, tiny beetles in flour or rice
- Do now: inspect dry goods before storing, use sealed containers (not original bags), freeze suspicious products for 72 hours to kill eggs, consider professional fumigation for commercial stored food
Year-round basics for every Jamaican home
- Weekly yard inspection for standing water (rainy season) or structural issues (dry season)
- Monthly check of door sweeps, screens, and entry points
- Immediate repair of any water leaks
- Trash in sealed bins, emptied regularly
- Food in sealed containers
- Vegetation trimmed back from the house
The one-visit-per-season plan
The simplest way to stay ahead of all of this is a quarterly pest control programme — one visit each season, timed to prevent that season's main pest issues. For most Jamaican homes, this costs less per year than reacting to individual outbreaks and keeps the property pest-free year-round.
Want to get on a seasonal programme? See our general pest control programme or request a quote. Residential plans starting from quarterly, with free re-service between visits if a problem shows up.
Published 2026-10-23 · Sim T's Pest Control & Fumigation