Yes. The Asian tiger mosquito has been established along the Croatian coast, Split included, for well over a decade. Here is what the ECDC and Croatian data actually say about where it lives, the short seasonal risk window, how to recognise it, and the cheap barrier-first steps that keep it off you.
Yes. The Asian tiger mosquito (Aedes albopictus) is established along the Croatian coast, including Split and the wider Dalmatian coast and islands, and has been for well over a decade. The European Centre for Disease Prevention and Control classifies Croatia as a country where the species is established, meaning it breeds and overwinters there rather than merely turning up (ECDC invasive mosquito maps, current known distribution, April 2026). If you are on a terrace in Split at four in the afternoon and a small striped mosquito is biting your ankles, that is almost certainly it.
That is the plain answer to the question most people are actually asking. The rest of this page keeps it in proportion: where the mosquito lives, how short the risk window really is, how to recognise it, and the handful of cheap, barrier-first steps that keep it off you and your family.
Q: Are there mosquitoes in Croatia, and is the tiger mosquito one of them?
A: Yes to both. Croatia has native night-biting mosquitoes (mainly Culex pipiens) and, since the mid-2000s, the day-biting Asian tiger mosquito (Aedes albopictus), which is now the dominant nuisance species on the coast and islands (Klobucar et al., Tropical Medicine and Infectious Disease, 2024). Around Split and the rest of Dalmatia the tiger mosquito is the one you are most likely to notice, because it bites in daylight and goes for the lower legs.
How the tiger mosquito settled in Croatia
This is not a new arrival. Aedes albopictus was first recorded in Croatia in Zagreb in October 2004, and the following year, 2005, it was already being found in the city of Split and other coastal localities (Klobucar et al., Journal of the American Mosquito Control Association, 2006). It spread fast. By 2008 it had reached most of the coastal areas and islands and had become a dominant nuisance across almost all of the urban areas of Split, and by the end of 2017 it had been recorded in every Croatian county (Klobucar et al., Tropical Medicine and Infectious Disease, 2024).
The reason it stays, rather than dying out each winter, is one unglamorous trait: unlike its purely tropical cousin Aedes aegypti, the tiger mosquito tolerates a cool European winter and its eggs survive the cold season (ECDC Aedes albopictus factsheet). On the warm Adriatic coast that tolerance is more than enough, which is why Split and Dalmatia now have a resident population rather than an occasional visitor.
The seasonal window is shorter than the summer
The tiger mosquito is a warm-weather insect. In Croatia it is active from roughly late spring through to autumn, peaking across the hot Adriatic summer months when both temperature and holiday water containers are at their most abundant. Outside that window it is not biting anyone; the eggs simply wait out the winter.
The disease-relevant window is narrower still. West Nile virus, carried by the native Culex mosquito rather than the tiger, has a Croatian season that in 2025 ran from about mid-May to late October across Europe as a whole (ECDC West Nile virus surveillance, 2025). For a traveller this means the practical answer to "when do I need to think about mosquitoes in Croatia" is: the same months you would want to be there anyway, late spring to early autumn, and most sharply in high summer.
What the bite actually means, kept in proportion
Here is the part that gets distorted online, in both directions.
A tiger mosquito bite in Croatia is, in the overwhelming majority of cases, exactly what it looks like: a small, itchy, raised welt that fades over a few days. In some people, especially children, the reaction is large and dramatic, a hot swelling several centimetres across, a recognised and almost always harmless condition informally called Skeeter syndrome, which we cover in full in the guide to Skeeter syndrome. Uncomfortable is not the same as dangerous.
The reason the species gets a mention beyond nuisance is the smaller, real risk sitting behind the ordinary bite. Aedes albopictus is a competent carrier of dengue, chikungunya and Zika (ECDC Aedes albopictus factsheet). Croatia has direct experience of this, and it is worth stating precisely rather than vaguely:
- In August and September 2010, a cluster of locally acquired dengue was confirmed on the Peljesac peninsula in southern Dalmatia. It was the first sustained autochthonous dengue transmission recorded in Europe since 1928 (Gjenero-Margan et al., Eurosurveillance, 2011).
- After fourteen years with no local dengue, a case in 2024 was linked to Zadar County in northern Dalmatia, the first indigenous dengue transmission recorded in that area (Croatian re-emergence study, Microorganisms, 2025; ECDC historical data on local dengue transmission).
Those are the only two local dengue events in Croatia in the modern record, roughly a decade and a half apart. Separately, West Nile virus circulates in Croatia most summers through the native Culex mosquito, not the tiger: Croatia reported 4 locally acquired human West Nile cases in 2025 and 6 in 2023 (ECDC West Nile virus surveillance, 2025).
So the honest summary is neither "a plague is coming" nor "there is nothing to think about." Local disease transmission in Croatia is real but rare and, when it appears, is detected and responded to. For local transmission of dengue or chikungunya to happen at all, two things have to line up in the same place: a person already carrying the virus, almost always after travelling from a region where it circulates, and an established population of tiger mosquitoes to pass it on (ECDC Aedes albopictus factsheet). A tiger mosquito is not born infected, and most of them in Croatia carry nothing at all.
Q: Should the tiger mosquito change my plans to visit Split or the Dalmatian coast?
A: No. The tiger mosquito is a nuisance to plan around, not a reason to stay away. The bite is almost always trivial, and serious local disease events are rare and geographically tight when they occur. The sensible response is not cancellation but the same cheap, barrier-first prevention you would use for mosquitoes anywhere. Watch for high fever, severe joint pain or a widespread rash in the week or two after bites and see a doctor if they appear, particularly after travel.
How to recognise it
You do not need a specialist. The tiger mosquito advertises itself: it is small, noticeably smaller than the large brown house mosquitoes many people picture, deep black rather than brown, with a single clean white stripe down the centre of its back and crisp white bands on its legs, which is where "tiger" comes from. It bites in daylight, most actively in the morning and late afternoon, and it targets the ankles, calves and feet (ECDC Aedes albopictus factsheet). If you want the full field guide, with the features side by side, see the Asian tiger mosquito, how to recognise it and keep it off you.
The four things that actually keep it off you
Because the tiger mosquito lives its whole life close to home and rarely flies more than a couple of hundred metres from where it hatched, the household, or the holiday apartment, has more control over it than over almost any other biting insect (ECDC Aedes albopictus factsheet). Four things, in order of impact.
1. Empty the standing water. This is the single most useful thing, and it is free.
The tiger mosquito breeds in tiny volumes of water: a plant saucer on a Dalmatian terrace, a bucket, a watering can, a blocked gutter, the tray under an air-conditioning unit, the folds of a rain cover. A bottle-cap is enough, and it does not use the sea or streams. Once a week, tip out everything holding water around your accommodation and scrub the container, because the eggs stick to the sides above the waterline. Remove the nursery and you remove the next generation before it can bite anyone.
2. Put a physical barrier between the mosquito and your skin.
A fine-mesh screen on a window or door, or a correctly specified net over a bed or a pram, keeps the insect out entirely, with no chemical at all. The mesh has to be genuinely fine, because the tiger mosquito is small and a coarse weave built for larger night-flying mosquitoes can let it straight through, the failure we set out in the guide to telling a net that works from one that only looks like it does. A barrier is the one method that neither wears off nor sprays anything into the air you breathe.
3. Use a proper repellent on the skin a barrier cannot cover.
Repellents containing DEET or picaridin genuinely work and rank among the most effective options tested (Fradin and Day, New England Journal of Medicine, 2002). Because the tiger mosquito bites low, apply to ankles, calves and feet, not just arms. A repellent is a supplement, not a barrier: its protection ends the moment you forget to reapply, so it is the top-up for the daylight hours a screen cannot cover.
4. Skip the things that only look like protection.
Citronella and scented candles deliver ambience, not a meaningful outdoor shield, and burning coils indoors trades biting insects for fine particulate in the air you breathe. We set out the evidence, category by category, in do citronella candles work. Spend your effort on the water and the barrier first, because that is where the tiger mosquito is actually beaten.
What we know
The short version
There are tiger mosquitoes in Croatia, they have been established along the coast and around Split since the mid-2000s, and they are here to stay. That is settled. What is not settled is how much of your Adriatic summer they get to ruin, and that is largely in your hands, because this mosquito lives and breeds within a stone's throw of where it bites you. Tip out the water, put a real barrier where it counts, top up with a proper repellent on ankles and feet, and keep the rare disease risk in proportion. Do those, and a mosquito that has settled a whole coastline still cannot cross your windowsill.
Sources: ECDC Aedes albopictus factsheet | ECDC invasive mosquito maps, April 2026 | Klobucar et al., JAMCA 2006 | Klobucar et al., Trop Med Infect Dis 2024 | Gjenero-Margan et al., Eurosurveillance 2011 | ECDC historical dengue transmission data | Microorganisms 2025 | ECDC West Nile virus surveillance 2025 | Fradin and Day, NEJM 2002
This article is general information, not medical advice. For travel health, disease risk or symptoms, consult a qualified healthcare professional.