Croatia's coast bites in the evening. The disease risk stays low.
Summer evenings in Dubrovnik, Split and on the islands bring mosquitoes, and the tiger mosquito adds a daytime shift. Croatia has had no local dengue since 2010, and every one of 2026's West Nile cases was inland.
Yes. Croatia's coast has mosquitoes in summer, and they bite mostly in the evening in towns like Dubrovnik and Split and on islands like Hvar and Korčula. The Asian tiger mosquito, a daytime biter, lives here too. Disease risk on the Dalmatian coast is low, and the one virus that rose in 2026, West Nile, stayed inland.
Evenings on the Dalmatian coast
June to September is mosquito season on the coast, and evening is when most visitors notice it: dinner on a stone terrace, a walk along the harbor after sunset, a night with the shutters open in an old-town apartment. Reports from Hvar and Dubrovnik are mixed, so plan for bites and count yourself lucky if they don't come. Bites tend to pick up after rain.
The tiger mosquito adds a daytime shift. The European Centre for Disease Prevention and Control (ECDC) lists it as present in Croatia and links it to the country's 2010 dengue cases. It bites in daylight, with peaks in the morning and late afternoon, so a garden lunch or a shady courtyard can bring bites too. CDC's Croatia page also lists leishmaniasis, spread by sand flies that bite from dusk to dawn.
One routine covers all three. Put repellent on before you head out for the evening, top it up after a swim, and run a plug-in vaporizer in the room on nights with open windows. Late spring and early fall are lighter as the nights cool.
West Nile stayed inland in 2026
Croatia's only local dengue outbreak was in 2010, when ECDC recorded 10 cases on Korčula and the Pelješac peninsula between August and October. There have been none since, and no local chikungunya in 2025 or 2026.
West Nile, spread by Culex mosquitoes that bite in the evening and at night, rose in 2026. ECDC counted 18 cases by October 21, all inland: 11 in the City of Zagreb and Zagreb county and the rest in counties to the north and east. In 2025, Split-Dalmatia county had its first-ever case, one of four nationwide. For a coastal trip the risk is low, and dusk repellent covers it.
Hikers and anyone staying in rural inland areas should check for ticks every day; CDC's advice on the tick-borne encephalitis vaccine is in the questions below. CDC lists no malaria medicine for Croatia, and the yellow fever vaccine is neither recommended nor required.
Where you're going
How the main stops compare for a June–September trip.
Split & Hvar
Expect some evening mosquitoes around harbors, gardens and old-town lanes, though Hvar's reputation is mixed from one trip to the next. Split-Dalmatia county had its first-ever local West Nile case in 2025 and none in 2026.
Dubrovnik, Korčula & Pelješac
Korčula and Pelješac were the site of Croatia's only local dengue outbreak, 10 cases in 2010, with nothing since. Evenings in Dubrovnik's old town and on the islands tend to be when the bites come.
Zagreb & inland Croatia
Home to most of Croatia's West Nile cases, with 11 of 2026's 18 in the City of Zagreb and Zagreb county. Hikers in the hills and forests should check for ticks every day.
The Croatia kit
- Picaridin 20% travel sprays: odorless for terrace dinners and easy to reapply after a swim. One 3.4 oz bottle covers about a week of daily use for one person.
- A plug-in vaporizer for old-town apartments and island rooms where the windows stay open at night.
- A light long-sleeved layer for harbor dinners after sunset.
What travelers report
Paraphrased from forum threads and linked so you can read them in full. Neither is dated to this season, and evenings on the coast vary a lot with weather, wind and where you stay.
- Hvar · June
One poster said mosquitoes attack after about 4 pm; a later June visitor saw none, noticed only a few people with bites and felt repellent was unnecessary. TripAdvisor ↗
- Croatia (coast and inland) · April to October
A Destination Expert's rule of thumb was that mosquito season starts when night temperatures rise above 15C and ends when they fall below, which means about May to September inland and April to October on the coast. TripAdvisor ↗
And the rule that outlasts every trip: any fever during or after your trip means a doctor visit, and you tell them you were in Croatia.
Traveler questions
Are there mosquitoes in Dubrovnik?
Yes, mostly in the evening in summer. Traveler reports from the coast are mixed, so some visitors notice few and others get bitten at dinner. Repellent before you head out for the evening and a plug-in vaporizer for nights with the windows open cover most of it. The disease risk is low: Croatia has had no local dengue since 2010.
Is there West Nile on the Croatian coast?
Very rarely. All 18 of Croatia's cases in 2026, counted by the European Centre for Disease Prevention and Control through October 21, were inland, mostly in and around Zagreb. Split-Dalmatia county had its first-ever case in 2025. West Nile is spread by mosquitoes that bite in the evening and at night, so the dusk repellent you'd wear anyway covers the small risk on the coast.
Do I need a tick-borne encephalitis vaccine for Croatia?
For a coast-and-islands trip, ticks are rarely the issue. CDC recommends the TBE vaccine for travelers with extensive tick exposure in areas where TBE occurs and says it may be considered for other outdoor activities. If you're planning long hikes or rural stays inland, ask a travel clinic 4–6 weeks before departure whether your plans fit, and check for ticks every day.
Is Croatia buggier than Italy?
Usually a little less. The tiger mosquito is established in most of Italy below about 2,000 feet (600 m), and Italy has had local dengue, chikungunya and record West Nile in recent summers. Croatia's coast has evening mosquitoes and a low disease risk. Our Italy briefing covers the other side of the Adriatic, and our Greece briefing covers the next stop south.
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.
- European Centre for Disease Prevention and Control
- European Centre for Disease Prevention and Control
- European Centre for Disease Prevention and Control
- CDC destination page for travelers
- European Centre for Disease Prevention and Control
- European Centre for Disease Prevention and Control
- European Centre for Disease Prevention and Control
- European Centre for Disease Prevention and Control
- European Centre for Disease Prevention and Control
- European Centre for Disease Prevention and Control
- European Centre for Disease Prevention and Control
- European Centre for Disease Prevention and Control