Negril's sand flies come up as the beach cools.

Are there mosquitoes in Negril? Some, mostly in the resort gardens, though the bite Negril is known for comes from sand flies, tiny midges that come up on Seven Mile Beach at sunrise, at sunset and after rain. The disease side is light this winter, with dengue low in Jamaica since late 2024 and no malaria medicine recommended.

Sand flies on Seven Mile Beach

Jamaicans call them sand flies or sand fleas, and Americans call them no-see-ums. Studies on the island in the 1960s identified them as Culicoides biting midges, two of which breed in tidal mangrove swamps. They are weak fliers that a breeze keeps grounded, and they bite low, on feet, ankles and calves.

Traveler threads from Negril name sunrise, sunset, shade, still evenings and the hours after rain as the worst times, with the sand flies coming up as the sand cools in the late afternoon. Mosquitoes are fewer in the drier December to April months, but the sand flies bite in winter as well as summer, so a January week needs the same plan as a July one. Wind and cool nights keep them down.

Spray feet, ankles and calves before you walk onto the beach at sunrise or sunset, reapply after every swim, and wear light long trousers to beach-level dinners. On still evenings, watch the sunset from a breezy deck or a West End cliff bar rather than from the sand. Picaridin and DEET both deter them, and steady reapplication matters as much as the bottle. Our Barbados sand fly guide explains the insect.

Mosquitoes add to it in the gardens behind the sand, Bloody Bay's resorts included, so put repellent on before dinner and keep balcony doors closed after dark.

Low dengue, and no parish counts

Dengue, chikungunya and Zika are endemic in Jamaica, all spread by the same day-biting Aedes mosquito. Dengue comes in waves, and the last big one, in 2023, reached 3,147 suspected, presumed and confirmed cases nationally by November. In October 2025 the health minister said dengue had stayed below the epidemic threshold since September 2024, and the ministry's bulletin for the week ending May 23, 2026, showed one lab-confirmed case nationwide and no deaths. There are no 2025 or 2026 dengue counts for Westmoreland or Hanover, the parishes around Negril, so the national picture is the guide. Check the CDC's Jamaica page shortly before you fly.

The routine is repellent over sunscreen in the morning and again by late afternoon, which also covers the sand flies' evening shift. Jamaica eliminated malaria in 2012, the CDC recommends no malaria medicine, and Jamaica isn't on the CDC's global dengue notice. The yellow fever vaccine isn't recommended and isn't required when you fly in directly from the US. The CDC considers Zika endemic, so if you're pregnant, talk to a healthcare provider before the trip. One note has nothing to do with insects. Jamaica declared a leptospirosis outbreak after Hurricane Melissa in November 2025, so stay out of floodwater and fresh water after heavy rain. Repellent doesn't help with that one.

Where you're going

Scores are for a December–April trip. Disease risk is the same along the whole strip; the bites change with sand, shade and wind.

Splitting the trip with Montego Bay? Our Montego Bay & Negril briefing compares the two, and the Jamaica briefing covers Ocho Rios and Kingston.

What travelers report

Paraphrased from TripAdvisor reviews and forum threads and linked so you can read them in full. Only one is dated, a December 2015 stay, so read them for when and where the bites happen rather than for this season.

• Couples Negril · December · 2015

  A December 2015 guest got dozens of mosquito bites, which they said ruined the trip, and advised bringing plenty of repellent. TripAdvisor ↗

• Negril (Sandals resort) · sunrise, sunset, after rain

  A traveler was badly bitten by sand fleas at a Sandals resort (large welts, more than 40 bites) even while using DEET. Replies said to reapply repellent consistently and named sunrise, sunset, shade, overnight and after rain as the worst times; several had good results with Avon Skin So Soft products. TripAdvisor ↗

• Negril beach and outdoor restaurants · dawn and dusk

  A longtime Negril visitor said the main biters are mosquitoes and sand fleas. A picaridin lotion worked on both, a lemon-eucalyptus repellent worked on mosquitoes but not sand fleas, and repellent wristbands did not work; another poster said tea tree oil on wrists and ankles kept bites very low. TripAdvisor ↗

• Negril · winter versus summer

  Posters said mosquitoes are fewer in the drier December to April months and worst after rain and at sunset, while sand fleas are not seasonal: they come up as the sand cools in the late afternoon and at dawn, dusk and after rain, and wind and cool nights keep them down. TripAdvisor ↗

One rule outlasts the trip. Any fever during or after your trip means a doctor visit, and you tell them you were in Jamaica, naming Negril. Dengue usually shows up within two weeks.

Traveler questions