Greece has seasonal mosquito activity from May through October, with peak populations in the hot summer months. The northern regions (Macedonia, Thrace), the Peloponnese wetlands, and the Thessaly plain have the highest mosquito density. Island destinations generally have lower mosquito abundance due to sea breezes.
West Nile virus is the primary mosquito-borne disease concern, with Greece experiencing seasonal outbreaks, particularly in northern and central regions. Dog heartworm is also transmitted to pets. Overall human disease risk is low, but West Nile can cause serious illness in older adults.
Culex pipiens is the dominant species and the main West Nile virus vector. Aedes albopictus has been expanding its range in Greece. The Mediterranean climate limits the mosquito season, but irrigated agricultural areas and wetlands support significant summer populations.
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Disease presence data is sourced from WHO, CDC, ECDC, and OpenDengue. This is not medical advice — consult a travel health professional before your trip.