Tonga
Season running low
In 2026 so far, the reported cases are below the expected number of cases. Cases are currently stable, as expected at this time of the year based on trends in previous years.
Data refreshed: 21 April 2026
Dengue cases in 2026
Some recent months include estimated values because official reports can arrive with delays.
Current year: Reported cases
Current year: Estimated cases (reported cases not available)
Uncertainty: 95% confidence interval
Further analysis
In March 2026, Tonga reported 311 dengue cases, well above what we would typically expect for this time of year.
Compared with February 2026, in which 0 cases were reported, this is a similar level of reported cases.
So far in 2026, the country has recorded 311 cases-about 0.8x the expected level-so the season is below average to date.
The last month with reported cases is February 2026.
In Tonga the average peak month is March.