Saint Lucia has year-round mosquito activity, with peak risk during the wet season from June through November. The low-lying coastal areas, Castries, and agricultural valleys carry the highest risk. The mountainous interior of the Pitons region has somewhat different exposure patterns.
Dengue fever is the primary concern, with moderate activity and periodic outbreaks. Saint Lucia has no malaria transmission. The tourism-dependent economy supports investment in vector control, particularly around resort areas.
Aedes aegypti is the dominant vector. The tropical climate with regular rainfall maintains breeding habitat throughout the year, with the wet season amplifying mosquito populations significantly.
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Explore mosquito risk briefings for other destinations in Central America & Caribbean.
Disease presence data is sourced from WHO, CDC, ECDC, and OpenDengue. This is not medical advice — consult a travel health professional before your trip.