Are there mosquitoes in Roatán? Some, but sand flies are the bite you'll remember.

Some, though the bite most visitors remember comes from sand flies, tiny biting midges that leave itchy welts on the legs at West End and West Bay. The CDC recommends malaria prevention medicine for the whole island. How much that matters depends on whether you're here for a cruise day or a week.

Sand flies, the island's real bite

Sand flies are biting midges, also called no-see-ums or sand fleas. They bite low, on feet, ankles and calves, and the welts often show up hours later. West End and West Bay draw the most complaints, and Utila's are just as real. Island regulars describe them as cyclical, nearly absent some weeks and heavy in others, especially after rain, and no part of the island is immune. They are weak fliers, so a steady breeze grounds them, and dusk on a calm day is the worst time. Mosquito repellent alone doesn't always stop them.

Put repellent on feet, ankles and calves before the beach and again before late afternoon. Use a lounger instead of lying on the sand, pick the breezy end of the beach, and rinse off salt water and sand soon after a swim. Our Barbados sand fly guide explains their schedule, and picaridin vs DEET compares the two repellents most used here.

Malaria: a cruise day versus a week

The CDC's Honduras page describes malaria transmission "Throughout the country and on the island of Roatán and other Bay Islands," with "No malaria transmission in the cities of San Pedro Sula or Tegucigalpa (the capital)." For travel there it recommends prevention medicine and lists "Atovaquone-proguanil, chloroquine, doxycycline, mefloquine, tafenoquine." It doesn't separate a cruise day from an overnight stay. The CDC puts the species mix at 70% P. vivax and 30% P. falciparum.

Recorded island cases are small but real. A Pan American Health Organization report counted 149 confirmed cases in Roatán municipality in 2012 and 80 in 2014, and the Bay Islands department had 10 in the first half of 2022. Malaria mosquitoes bite from dusk to dawn, so an overnight stay carries far more exposure than a daylight port call.

After sunset, wear light trousers and long sleeves for dinner and sleep in a screened or air-conditioned room. That covers the evening sand flies too.

Dengue is busiest on the mainland

The Pan American Health Organization counted 9,782 dengue cases in Honduras through mid-September 2026, with the highest counts in Tegucigalpa's Central District and in Cortés, around San Pedro Sula. On October 13 the newspaper La Tribuna put the count at 10,749 with five severe-dengue deaths, and said a sixth death, a 19-year-old woman in Roatán, was under investigation. There's no separate 2026 figure for the Bay Islands. The dengue mosquito bites in daylight, so morning repellent over sunscreen covers it and the sand flies.

Where you're going

Scores are for a December–April trip.

Adding Copán, La Ceiba or the mainland? Our Honduras briefing covers the whole country.

What travelers report

Paraphrased from cruise and travel forums and reviews, newest dated first, and linked so you can read them in full. Most are undated, and sand-fly weeks on Roatán come and go with rain and wind.

• Roatán (incl. West Bay) · Thread from January · 2019

  Replies in a January 2019 thread said Roatán's sand flies are cyclical, nearly absent some weeks and heavy in others, especially after rain, and that no part of the island is immune. Posters recommended DEET spray or oil-based products, rinsing off salt water quickly, and noted that West Bay beach is raked in the mornings. Cruise Critic ↗

• West Bay Beach, Roatán · Review posted August · 2017

  A visitor staying in West End lay on the sand at West Bay in the late afternoon and came back covered in itchy red bites, having been warned only about nighttime pests. Topical antihistamine cleared them in about two days, and the reviewer advised using loungers instead of the sand and layering bug spray with sunscreen. TripAdvisor ↗

• Roatán

  Cruise forum commenters described sand flies as a nuisance in shady spots and said friends who went onto the beach got bitten. Their fix was DEET repellent. Source ↗

• Mahogany Bay cruise port, Roatán

  A cruise visitor reported that their group spent the day on the Mahogany Bay beach and nobody got a single bite, including a member with significant insect-bite allergies. Cruise Critic ↗

• Roatán

  Replies said mosquitoes on Roatán are a moderate problem and sand flies (no-see-ums) are the bigger nuisance, with dusk the worst time. One poster said mosquito repellents did not stop the sand flies, another said a steady breeze kept bugs away, and DEET and picaridin were the products mentioned. TripAdvisor ↗

• Roatán (West End)

  Asked whether bug complaints were exaggerated, replies said reactions vary widely, with some people bitten heavily while their partners are not. Suggestions included covering up at night, not lying directly on the sand, a 30% DEET spray, a natural repellent sold locally in West End, and antihistamines and cortisone cream for bites. TripAdvisor ↗

The CDC doesn't recommend a yellow fever vaccine for Honduras, and none is required when you fly from the US. One rule outlasts the trip. Any fever during the trip or in the year after it means a doctor visit, and you tell the doctor you were in Honduras.

Traveler questions