Singapore fights dengue hard. Pack repellent anyway.
Dengue cases in 2026 are near multi-year lows, helped by Wolbachia mosquito releases and strict control. It is still reported in every month, recent weeks ran above 2025, and the bites concentrate in gardens and parks.
Are there mosquitoes in Singapore? Yes. The city runs one of the most organized dengue-control programs anywhere, and dengue is still reported year-round. For a typical visit the risk is low: 2026 cases are near multi-year lows, there is no malaria, and most bites happen in gardens, parks and nature reserves.
Dengue in a city that fights it hard
Singapore's National Environment Agency (NEA) runs Project Wolbachia, which releases male Aedes aegypti mosquitoes carrying Wolbachia bacteria, designed so that the eggs they fertilize don't hatch. By March 2026 the releases covered about 740,000 households, up from 580,000 in April 2025. Five more areas, including Little India, Toa Payoh and Ang Mo Kio, were added from April to October, toward half of all households by the end of 2026. NEA's own studies found dengue risk more than 70% lower at release sites. Some experts say Wolbachia's share of the decline is hard to separate from immunity and a global downturn.
Either way, the numbers are low. Singapore had about 4,000 dengue cases in 2025, roughly 70% below 2024's 13,655 and the lowest year since 2018. WHO counted 2,564 cases in 2026 through October 3. The recent weeks are the part to watch. The 74 cases in the week of September 13–19 were 51% above the same week of 2025, and the 71 cases in the week to October 3 were 78% above it. It's too early to say whether that's the start of a rebound.
Where and when they bite
The dengue mosquito bites by day, with peaks after sunrise and in the late afternoon. Around Marina Bay and the built-up center, bites are few. They concentrate in shaded greenery: the Botanic Gardens, the zoo, nature reserves such as Sungei Buloh and wooded corners of Sentosa like Fort Siloso. Put repellent on before a garden walk or a trail, over sunscreen, and top it up toward dusk. Our dengue & Zika daily routine has the full schedule.
Dengue turns up in every month. Roughly December to March tends to be quieter and about May to October tends to be the peak, and in 2026 the September and October weeks ran above last year. Carry repellent whatever the month.
The CDC has no travel notice for Singapore and lists no malaria areas and no Japanese encephalitis vaccine for it. It does list Zika among the diseases for travelers, so if you're pregnant, talk to your healthcare provider before the trip. Adding a neighbor? Our Malaysia briefing covers dengue and the Borneo malaria question, and our Bali briefing covers the CDC's Level 2 Zika notice, which says pregnant travelers should avoid travel to Bali.
Where you're going
Marina Bay & Gardens by the Bay
The open, built-up center is light on bites. At Gardens by the Bay, the planted areas near water tend to have more mosquitoes than the open walkways.
Sentosa
The beaches and resorts are usually fine. Wooded corners such as Fort Siloso, at the island's western tip, are where bites pick up, so spray before you visit.
Botanic Gardens, the zoo & nature reserves
Singapore's most-cited bite spots, with shade, tree cover and water. Put repellent on before you start a walk at the Botanic Gardens, the zoo or a reserve like Sungei Buloh.
The Singapore kit
- Picaridin 20% travel sprays: odorless in the humidity, layers over sunscreen and fits a day bag for the Botanic Gardens or Sentosa. One 3.4 oz bottle covers about a week of daily use for one person.
- Oil of lemon eucalyptus 30% if you'd rather use a plant-based repellent. It's an EPA-registered option, and our natural repellents guide compares it with the rest.
What travelers report
Paraphrased from reviews and linked so you can read them in full. Neither is dated, so read them as a guide to which spots bite.
- Fort Siloso, Sentosa
A reviewer warned that mosquitoes at Fort Siloso bite a lot. TripAdvisor ↗
- Singapore Botanic Gardens
A reviewer called the gardens lovely but warned visitors to beware of mosquitoes. TripAdvisor ↗
One last rule. Any fever during or after your trip means a doctor visit, and you tell them you were in Singapore.
Traveler questions
Is there malaria in Singapore?
The CDC's Singapore page lists no malaria transmission areas and no malaria prevention medicine. The mosquito-borne disease to plan for is dengue, and the protection is daytime repellent.
Is dengue a risk for tourists in Singapore?
Low. WHO counted 2,564 cases in Singapore in 2026 through October 3, and 2025 was the lowest year since 2018. Weekly cases in September and early October ran above the same weeks of 2025, so carry repellent and use it in gardens, parks and nature reserves during the day.
I'm pregnant. Is Zika a concern in Singapore?
There is no CDC Zika notice for Singapore. The CDC does list Zika among the diseases for travelers there, including spread from a pregnant woman to her baby, so talk to your healthcare provider before the trip. If you're combining Singapore with Bali, the CDC's Level 2 notice for Bali says pregnant travelers should avoid travel there; our Bali briefing has the details.
Do I need a yellow fever vaccine for Singapore?
The CDC doesn't recommend it, and it isn't required when you fly from the US. Singapore does require proof of vaccination from travelers aged 1 and older arriving from a country with yellow fever risk, including airport layovers of more than 12 hours there, which matters on a multi-country 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.