There is no weather station located at Caroline. During 2014 (as of 2021 the last year for which data is publicly available), monthly mean temperatures at South Tarawa, the capital of Kiribati, ranged between , with maximum monthly temperatures ranging from and minimum temperatures ranging from . Caroline Island lies within a region of highly variable precipitation; between 1950 and 2010 the region received an average of of rain annually. Tides are on the order of , and trade winds, generally from the northeast, mean that corner of the island experiences the roughest seas.