Kiribati has a hot, humid, tropical climate with an average temperature of 28.3°C and average rainfall of about 2,100 mm per year in Tarawa [1980 - 1999]. Its climate is closely related to the temperature of the oceans surrounding the small islands and atolls.
How does the temperature affect with atolls? Still great for swimming? As I can see the temperature is not that hot.
It goes down by less than 3°C during winter than island water. You cannot really go swimming there but instead on the shore.