Senegal has peak mosquito activity during the rainy season from June through October. The southern Casamance region, the Kedougou area, and the Senegal River valley carry the highest malaria burden. The Dakar peninsula has lower but present risk. The dry Sahel zone in the north has seasonal activity limited to the wet months.
Malaria (P. falciparum and P. vivax) is the primary concern, with most transmission during and just after the rains. Yellow fever is endemic. Dengue, chikungunya, Zika, West Nile virus, and lymphatic filariasis have also been reported.
Anopheles gambiae is the primary malaria vector. Aedes aegypti transmits dengue, yellow fever, and Zika. Culex species are widespread. The short rainy season concentrates risk into a few intense months.
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Explore mosquito risk briefings for other destinations in West Africa.
Disease presence data is sourced from WHO, CDC, ECDC, and OpenDengue. This is not medical advice — consult a travel health professional before your trip.