The water temperature ranges from 72 °F (22 °C) in winter to 82 °F (28 °C) in the summer. Cool between April and September, the days become hotter and more humid starting in October. The daily temperature ranges from 68 °F (20 °C) to 90 °F (32 °C). Southeasterly trade winds occur from May to October.
Vanuatu has a long rainy session, with significant rainfall usually occurring almost every month. The wettest and hottest months are December through April, which also constitute the cyclone season. The driest months are June through November. Rainfall averages about 2,360 millimetres (93 in) per year but can be as high as 4,000 millimetres (160 in) in the northern islands.