Croatia might have plenty of mosquitoes, especially during the summer months, but popular tourist cities regularly repel mosquitoes each season to decrease their population. Even a mosquito bite isn't that bad unless you are a mosquito magnet or have allergic reactions.

Mosquitoes in Croatia can be quite bothersome, particularly during the warm months of June through September, though the intensity varies by region. In coastal areas like Dalmatia (Split, Dubrovnik) and the islands (Hvar, Brač), the presence of the Asian Tiger Mosquito—which is active during the day—has increased in recent years. These mosquitoes are particularly aggressive and can thrive in small amounts of standing water in gardens or balconies. In the northern and eastern regions near the Danube and Sava rivers (like Osijek), mosquitoes can reach "plague" proportions in early summer due to the vast wetlands, requiring regular aerial spraying by local authorities. While the risk of serious mosquito-borne diseases like West Nile virus is relatively low in Croatia, the bites are often itchy and numerous. In 2026, travelers are advised to use repellents containing DEET or Icaridin, especially during "golden hour" and in the evening. Most hotels and apartments provide "plug-in" repellents, and keeping windows closed or using screens is essential for a peaceful night's sleep in more rural or wooded areas.