Taiwan has mosquito activity from March through November, with peak risk during the hot, humid months of June through September. Southern cities like Kaohsiung and Tainan are the primary dengue hotspots. The tropical south has longer activity seasons than the subtropical north.
Dengue fever is the primary concern, with periodic outbreaks in southern Taiwan that can involve thousands of cases. Japanese encephalitis is present in rural agricultural areas. Overall risk in Taipei and the north is lower than in the southern cities.
Aedes aegypti is the dominant dengue vector in southern Taiwan, while Aedes albopictus extends throughout the island. Culex species transmit Japanese encephalitis near rice paddies and rural wetlands.
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Explore mosquito risk briefings for other destinations in East Asia.
Disease presence data is sourced from WHO, CDC, ECDC, and OpenDengue. This is not medical advice — consult a travel health professional before your trip.