In 2026 so far, the reported cases are well below the expected number of cases. Cases are currently decreasing, as expected at this time of the year based on trends in previous years.
Data refreshed: 18 October 2026In September 2026, Costa Rica reported 973 dengue cases, well below what we would typically expect for this time of year.
Compared with August 2026, in which 1,361 cases were reported, this is a similar level of reported cases.
So far in 2026, the country has recorded 5,049 cases-about 0.4x the expected level-so the season is below average to date.
The last month with reported cases is September 2026.
In Costa Rica the average peak month is August.
