Panama City needs a daytime routine. Bocas and San Blas add a clinic visit.

A first trip to Panama usually pairs a few nights in Panama City and a Canal visit with time on the water, most often in the Bocas del Toro islands on the Caribbean side or the San Blas islands of the Guna Yala comarca. Some travelers add the cool highlands around Boquete. Two things matter before you book. Dengue has surged since late June, and the CDC's malaria map draws a line between Panama City and those islands.

Dengue jumped in the second half of 2026

Panama is on the CDC's Global Dengue travel notice. After a slight rise in the first half of the year, cases jumped from late June. In its October 20 update, the Pan American Health Organization counted 11,772 suspected dengue cases in Panama so far in 2026, 9,679 of them confirmed, and 20 deaths. That is already more than in all of 2025. All four dengue types are circulating.

The mosquito behind it, Aedes aegypti, breeds in small pools of standing water and bites in daylight, with peaks after sunrise and before sunset. It thrives in towns and cities, so the habit starts on your first morning in Panama City. Our dengue & Zika daily routine has the full schedule; on a Panama trip it comes down to three habits.

Chikungunya, spread by the same mosquito, is barely present. PAHO counted 7 confirmed cases in Panama this year, and the CDC generally does not recommend the chikungunya vaccine for travelers here. Costa Rica, by contrast, has an active CDC Level 2 chikungunya notice for its northwest.

Where the malaria line falls

The CDC says malaria transmission occurs in Bocas del Toro, Chiriquí, Colón, Darién, Panamá, Panamá Oeste and Veraguas provinces and in the Emberá, Guna Yala and Ngäbe-Buglé comarcas, the indigenous territories. It recommends prevention medicine for all of them. There is no transmission in Panama City or the Canal Zone, and there the CDC recommends bite precautions only. That puts both classic island add-ons on the list, along with Chiriquí, the province that includes Boquete.

Malaria worsened between March and June, and the health ministry counted 4,588 cases through late June 2026, concentrated in rural areas and indigenous comarcas. Health officials describe malaria as endemic in Guna Yala, Darién, Panamá Este, northern Veraguas and Ngäbe-Buglé. Most cases are P. vivax. The CDC's medicine options also differ on either side of the Canal, because chloroquine resistance occurs to the east.

Whatever the clinic decides, start repellent and long sleeves in the late afternoon on the islands. A study in Guna Yala found that its malaria mosquitoes bite outdoors in the early evening. At night, a screened or air-conditioned room or a bed net covers the rest.

Yellow fever applies east of the Canal

The CDC recommends yellow fever vaccine for travelers 9 months and older going to Darién and the other mainland areas east of the Canal Zone. It does not recommend it for travel limited to Panama City, the Canal Zone, the San Blas islands, the Balboa islands, or anywhere west of the Canal, which includes Bocas del Toro and Boquete. Travelers arriving directly from the US need no proof of vaccination.

A two-country trip can change that. Panama requires proof of vaccination from travelers aged 1 and older arriving from countries with yellow fever risk, such as Colombia. If Colombia comes first, check the rule and ask a travel clinic about the vaccine before you go. Our Colombia briefing covers that side, including Colombia's own entry rule.

Bocas del Toro and the chitras

Bocas del Toro has a reputation for chitras, the local name for tiny biting midges also called no-see-ums or sand flies. The traveler reports further down back that up. Midges are weak fliers, so a steady breeze grounds them. They come out at dawn and dusk and in still air, and they go for ankles and lower legs. The San Blas islands tend to have the same problem at dusk and in calm weather.

Timing does most of the work. Spend beach time in the breezy middle of the day, put repellent on feet, ankles and calves before late afternoon, wear light trousers for evenings by the water, and shower after the beach. Our sand fly guide explains the insect.

Boquete, the rainforest and Darién

Boquete, a cool highland town at about 1,200 m, is comparatively light on bites. Chiriquí is a CDC malaria province, and the CDC lists provinces rather than towns, so raise a highland-only stay with the clinic. Day hikes in the rainforest along the Canal, around Gamboa and Soberanía, bring jungle mosquitoes, so wear long sleeves and repellent.

Darién is not a typical tourist area. The CDC recommends malaria prevention medicine and yellow fever vaccine there, and it was the center of Panama's first large Oropouche outbreak in 2025. Oropouche is spread mainly by biting midges, and the CDC notice that listed Panama for it has since been removed. Forested rural areas also carry some risk of leishmaniasis, a skin infection spread by tiny forest sand flies that bite from dusk to dawn. See a doctor about any bite sore that won't heal after the trip.

Where you're staying

Here is how the main stops compare for a December–April trip.

Dry in the city, damp on the islands

Mid-December to April is the dry season on the Pacific side, so Panama City and the Pacific beaches have fewer places for Aedes to breed. Bocas del Toro and San Blas stay humid with frequent showers, so bites continue there, and the malaria advice applies in every month. In October the Pan American Health Organization warned that El Niño could bring outbreaks outside the usual season, so keep the daytime habit even in the dry months.

What travelers report

Paraphrased from traveler reviews and linked so you can read them in full. Both come from Bocas del Toro, and neither is dated to this season. Individual trips vary with weather, wind and where you stay.

• Playa Estrella (Starfish Beach), Bocas del Toro · October · 2016

  A reviewer warned that the sand is full of sand flies and that the bites were severe, advising visitors to bring a towel, though they still liked the beach. TripAdvisor ↗

• Eclypse de Mar, Isla Bastimentos, Bocas del Toro

  Guests at this overwater lodge said chitras (tiny biting midges) were everywhere and they ended up with more than a hundred bites between them, after staff had told them there was nothing to worry about. TripAdvisor ↗

One more rule outlasts the trip. Any fever during your trip or in the year after it means a doctor visit, and you tell them you were in Panama, naming Bocas del Toro, San Blas or Darién if you went. Dengue usually shows up within two weeks; malaria can take longer.

Traveler questions