The climate on the Bali Island is equatorial and damp, as on the most part of Indonesia. Average monthly temperature on the island is 270C with insignificant fluctuations of 3-4 degrees. Humidity level is really high and can reach 80%.
There are two seasons.
Rainy season begins in the end of October and in the middle of November, and ends in the end of March. There are usually some rainfalls with a thunderstorm.
The dry season begins in April and continues up to October. It rains seldom and for a short period.
In mountainous areas, it can rain constantly, at any time of the year.
The average sea temperature is 26 degrees Celsius with insignificant fluctuations during the day.