Trinidad and Tobago has year-round mosquito activity, with peak risk during the wet season from June through December. Trinidad, with its larger land area and more varied terrain, carries higher risk than Tobago. Urban areas including Port of Spain and the east-west corridor are dengue hotspots.
Dengue fever is the primary concern, though at lower levels than larger Caribbean nations. Chikungunya, Zika, yellow fever (risk from proximity to South America), West Nile virus, and St. Louis encephalitis are also present. The diverse disease profile reflects the islands proximity to the South American mainland.
Aedes aegypti is the dominant vector in populated areas. Culex species are associated with West Nile virus. The islands tropical climate and rainfall patterns support robust mosquito populations year-round.
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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.