When are typhoons most likely to affect Tonga?

In Tonga, typhoons—more commonly referred to as tropical cyclones in this region—are most likely to occur between December and April.1

Generally, tropical cyclones in the Southern Hemisphere are warm-season phenomena that occur during the late summer months, with peak frequency typically observed from January to March. While these storms can impact various parts of the country, the northern islands of Tonga are noted to be particularly vulnerable to them.231