Montserrat's dengue mosquito bites by day. Put repellent on before you leave Antigua.
- No CDC travel notice for mosquito-borne disease
Dengue and Zika are present, local dengue cases were reported in late 2025, and there is no malaria. December to April is the drier part of the year, and a daytime repellent habit covers a stay or a day trip, with extra spray on the ankles for the sand flies at dusk.
Are there mosquitoes in Montserrat? Yes, including the day-biting Aedes mosquitoes that spread dengue, which the CDC lists for the island along with Zika. Local dengue cases were reported in late 2025. There is no malaria, so for a winter stay or a day trip from Antigua, the routine is repellent in daylight and a little extra at dusk on the beach.
Dengue, Zika and the 2014 chikungunya year
Dengue comes back to Montserrat in small outbreaks. The Pan American Health Organization (PAHO) counted 17 suspected cases in 2014, none in 2015 and 25 probable cases by early December 2016, and local cases were reported again in late 2025. There is no CDC travel notice, and Montserrat isn't on CDC's global dengue list.
Chikungunya hit hard in the 2014 Caribbean epidemic. PAHO's 2017 report for Montserrat counts 105 suspected and 14 confirmed cases that year, a rate of 2,380 per 100,000 people, then 7 suspected cases in 2015 and 5 in 2016. The first local Zika cases came in late 2016, and PAHO counted 23 suspected cases by mid-January 2017. The CDC lists it with past transmission and no current outbreak, so if you're pregnant, talk to a healthcare provider before the trip.
All three viruses travel by the same day-biting mosquito. Put repellent on over sunscreen in the morning, before the ferry or flight if you're coming from Antigua, and again in the late afternoon. Our dengue & Zika routine has the full schedule. The CDC recommends no malaria medicine or yellow fever vaccine, and Montserrat requires proof of yellow fever vaccination only from travelers 1 year or older arriving from a country with yellow fever risk.
Sand flies at dusk, ticks on the trails
Montserrat also has sand flies, the tiny biting midges Americans call no-see-ums. They're weak fliers that go for ankles and lower legs at dawn and dusk, mostly on calm days, so spray your feet and calves before sitting on a beach at sunset. Our Barbados sand fly guide explains their schedule. The CDC also lists African tick-bite fever, so check for ticks after hikes through pasture and goat country, and leptospirosis, so stay out of floodwater and the ghauts after heavy rain.
Where you're going
How the two sides of the island compare for a December–April trip.
Little Bay & Brades
The ferry landing and new town in the island's safe north, where day-trippers from Antigua arrive. Put repellent on before you step ashore, since dengue's mosquito bites in daylight.
Soufrière Hills & the Exclusion Zone
Plymouth, the buried former capital, lies in the volcano's Exclusion Zone, which you enter only on an authorized tour. Few people live near it, so dengue exposure is lower, though repellent still belongs in the bag for the lookouts.
Starting from Antigua? Our Antigua briefing covers the beach sand flies there.
The Montserrat kit
- Picaridin 20% travel sprays: odorless in the heat, layers over sunscreen and quick to reapply after a swim. One 3.4 oz bottle covers about a week of daily use for one person.
- Light long pants or socks for dusk on the beach, when sand flies go for your ankles.
What travelers report
Paraphrased from an older TripAdvisor forum thread and linked so you can read it in full. It isn't dated, and bites vary with the wind and the season.
- Montserrat (general) · night
Asked about a mosquito-sensitive spouse, a reply said mosquitoes are not really bad but there are some, especially at night, and repellent worked well. Another poster said the sand flies were much worse than the mosquitoes and advised bringing itch lotion. This is an older thread. TripAdvisor ↗
One rule outlasts the trip. Any fever during or after your trip means a doctor visit, and you tell them you were in Montserrat. Dengue usually shows up within two weeks of the bite.
Traveler questions
Is there dengue in Montserrat right now?
Dengue is present on the island, and local cases were reported in late 2025. There is no CDC travel notice, and Montserrat isn't on CDC's global dengue list. Before a December or January trip, check the Ministry of Health and Social Services for any update, and wear repellent in the daytime, when the dengue mosquito bites.
Do I need repellent for a day trip from Antigua?
Yes. A day trip is spent mostly in daylight, which is when the Aedes mosquitoes that spread dengue bite. Put it on before you leave Antigua, reapply after a swim or a hot hike, and spray your ankles before any time on the beach at dusk, when sand flies bite.
Do I need any vaccines or malaria pills for Montserrat?
The CDC recommends no malaria medicine and no yellow fever vaccine, and you don't need proof of yellow fever vaccination when you fly in from the US. The CDC lists Zika for Montserrat, so pregnant travelers should talk to a healthcare provider before the trip.
Sources
Health authorities, surveillance reports and news coverage of official bulletins used for this briefing, last checked October 2026. Traveler reports are linked where they appear. This page summarizes public-health guidance and is not medical advice.