Sri Lanka

Season running high

In 2026 so far, the reported cases are well above the expected number of cases. Cases are currently increasing, as expected at this time of the year based on trends in previous years.

Data refreshed: 18 June 2026

Dengue cases in 2026

Compare to

Current year: Reported cases Current year: Estimated cases (reported cases not available) Uncertainty: 95% prediction interval (validation-calibrated)

Further analysis

In May 2026, Sri Lanka reported 8,602 dengue cases, well above what we would typically expect for this time of year.

Compared with April 2026, in which 5,662 cases were reported, this is a similar level of reported cases.

So far in 2026, the country has recorded 33,872 cases-about 1.4x the expected level-so the season is above average to date.

The last month with reported cases is May 2026.

In Sri Lanka the average peak month is July.