Galápagos cruises see few bugs. The island towns had a dengue outbreak in 2026.

Yes, mostly in the towns. The Galápagos had Ecuador's highest dengue incidence in 2026, with 660 cases by October 17, and the day-biting mosquito that spreads it lives around Puerto Ayora, Puerto Baquerizo Moreno and Puerto Villamil. Visitors who sleep aboard a cruise and land on uninhabited islands see few mosquitoes, while a land-based stay calls for daytime repellent.

The 2026 dengue outbreak

Ecuador's health ministry counted 660 dengue cases in the Galápagos through October 17, 2026, about 2,168 per 100,000 people. That is the highest rate among the country's 24 provinces and more than three times Manabí's, the next highest. The province's one dengue death this year was in Puerto Baquerizo Moreno, on San Cristóbal. The ministry's bulletins give only the provincial total, so the split between the islands isn't known.

The outbreak took off in late April after a quiet first quarter. New cases ran at about 25 to 35 a week from May to early September, then slowed to 8 to 22 a week, with 10 in the week to October 17. Ecuador is on the CDC's global dengue list.

The dengue mosquito, Aedes aegypti, bites in daylight, with peaks after sunrise and in the late afternoon. In town, put repellent on over sunscreen in the morning, again after swimming and before dinner outdoors, and pick an air-conditioned or screened room. Our dengue & Zika routine has the full schedule.

Cruise or town stay

The native black salt marsh mosquito breeds in brackish water and mangroves and will bite people, and mangrove panga rides have a reputation for mosquitoes. Horse flies bite at some beaches, especially right after a swim, with La Lobería on San Cristóbal and Las Bachas on Santa Cruz both named by visitors. San Cristóbal's streams also breed a biting black fly.

When to go

The worst months depend on the risk. Island visitors call December to April the buggiest stretch for nuisance insects. Dengue in 2026 took off in late April and ran highest from May to early September, after almost no cases from January to March. September to November fell between the two this year, though new cases hadn't stopped by mid-October. On a liveaboard cruise, exposure stays low in any month.

Malaria, yellow fever and the Amazon

The CDC reports "No malaria transmission on the Galápagos Islands," and says yellow fever vaccine "is not recommended for travel limited to areas >2,300 m (7,550 ft) elevation, the cities of Guayaquil or Quito (the capital), or the Galápagos Islands." Ecuador requires proof of vaccination from travelers aged 1 to 60 who have spent more than 10 days in Colombia, Peru, Brazil or Bolivia, and the dose must be at least 10 days old. Adding an Amazon lodge? See a travel clinic 4–6 weeks before departure. Our Ecuador briefing covers the mainland and the Amazon, and our Peru briefing covers Machu Picchu.

Where you're staying

What travelers report

Paraphrased from TripAdvisor threads and reviews and linked so you can read them in full. Most aren't dated, and what you notice depends a lot on whether you sleep aboard or in town.

• Galápagos cruise · early June · 2022

  A cruise passenger's trip report said they had no problem with insects and saw no mosquitoes. TripAdvisor ↗

• Galápagos (Puerto Ayora) · May

  A May visitor said the introduced mosquitoes and flies concentrate around the inhabited islands of Santa Cruz, San Cristóbal and Isabela, and that the main nuisance in Puerto Ayora was non-native paper wasps rather than mosquitoes. TripAdvisor ↗

• Santa Cruz (Puerto Ayora) · rainy season

  In a thread about bugs in the rainy season, a poster who had lived on Santa Cruz for four years said the only time mosquitoes were even a slight nuisance was at an outdoor restaurant in the evening. TripAdvisor ↗

• La Lobería beach, San Cristóbal

  A reviewer of La Lobería beach headlined the review 'rough sea and horseflies'. TripAdvisor ↗

One rule outlasts the trip. Any fever during or after your trip means a doctor visit, and you tell them you were in the Galápagos and anywhere else on the route. If you were bitten in town, bitten in a dengue zone covers what to watch for.

Traveler questions