Weather can be quite changeable from day to day and varies throughout the islands. It is generally hot throughout the year, although the trade winds provide some moderating influence. Rainfall is heaviest in Rarotonga, while the northern atolls tend to be drier. The coolest months are June to August, while November to March marks the warmer season, which also has the highest rainfall.

Lightweight cottons and linens throughout the year. Warmer clothes are advised for the evenings.