Placencia's sand flies decide the trip, and the wind decides the sand flies.

Yes, and on the Placencia peninsula the bites you'll notice most come from sand flies, the tiny biting midges called no-see-ums in the US, at dawn and dusk. Mosquitoes matter too, because dengue is endemic and its mosquito bites by day. The CDC lists no malaria medicine for Belize.

Sand flies on the beach side and the lagoon side

Placencia has the strongest sand-fly reputation in Belize. The biters are midges, weak fliers that go for legs, ankles and feet and come out mostly at dawn and dusk. Forum posters tend to say a breeze helps without reliably driving them off, that they get through most screens, and that most beachfront places rake the sand daily to keep them down. Several posters report few or no bites at all.

The peninsula has two sides. The east side, from Maya Beach and Seine Bight down to Placencia Village, faces the Caribbean, the trade wind and the daily raking. The west side faces the sheltered Placencia Lagoon, with mangrove edges, docks and still air, and one lagoon-side visitor said the flies came out at dusk around the pool. A calm evening on the lagoon side is likely the worst moment of the trip.

Put an EPA-registered repellent on legs, ankles and feet before dawn and dusk and after every swim, and pick a breezy beach-side room or a well-screened, air-conditioned one. Coconut oil, baby oil and Skin So Soft are local favorites, but they aren't EPA-registered repellents, so keep a registered one as the base layer. Our Barbados sand fly guide explains how midges behave, and the Ambergris Caye briefing covers the northern cayes.

Dengue, and what the CDC says about malaria

Dengue is endemic in Belize, and the CDC rates the risk frequent or continuous. Stann Creek, Placencia's district, has carried a large share of recent seasons, with about a quarter of Belize's 2024 cases, local news reported. In October 2026 the Pan American Health Organization reported dengue rising again across Central America. Repellent over sunscreen in the morning and late afternoon covers the dengue mosquito.

The CDC's Belize page names no malaria areas, and its vaccines and medicines list has no malaria entry. Its general travel tips still say, "Malaria is a risk in some parts of Belize." The World Health Organization certified Belize malaria-free in 2023. No yellow fever vaccine is recommended or required. Adding Tikal? The CDC recommends malaria medicine for Guatemala's Petén department, so see a travel clinic 4–6 weeks before departure.

Jungle tours and the reef

Reviewers of the Monkey River trip, a boat ride down the coast and up the river into Toledo district, tend to call the jungle walk the buggy part of the day, with heavy mosquitoes and doctor flies. Cockscomb Basin's forest trails have a similar reputation. Wear long sleeves, trousers and closed shoes, ideally permethrin-treated, carry repellent and check for ticks afterward. The forest also holds a different sand fly, the phlebotomine kind that spreads leishmaniasis and bites mainly from dusk to dawn, so limit time outdoors in the forest at night, as the CDC advises. Snorkel trips to the small, breezy Laughing Bird Caye and Silk Cayes are the easy part.

Where you're going

Scores are for a December–April trip.

The Belize briefing covers the whole country, and the San Ignacio & Cayo briefing covers the jungle lodges and caves inland.

What travelers report

Paraphrased from a TripAdvisor thread and a tour review and linked so you can read them in full. Neither gives a year, so read them as the general picture.

• Placencia · Winter

  A winter visitor bitten repeatedly on the first day asked for help; replies said the biters are sand flies, that DEET works for some people but not all, and suggested antihistamine and hydrocortisone cream. One reply said a visitor who bought a Cutter spray had no more bites, and another poster found sand flies only in Placencia, not in Corozal or Cayo. TripAdvisor ↗

• Monkey River Eco Tours (Monkey River tour from Placencia)

  A reviewer was bitten by a tick on the tour and advised other visitors to cover up and check themselves afterwards. TripAdvisor ↗

One rule outlasts the trip. Any fever during or after the trip means a doctor visit, and you tell the doctor you were in Belize. The same goes for a bite sore that won't heal.

Traveler questions