April - August mainly dry season
November - Feburary wet season.

Although it maybe the wet season when you are there ... this will probably mean a few tropical showers in the afternoons , lasting an hour or so. Its a great chance to cool down and have a look inside some of the shops whilst its raining OR have a long cool drink as it passes.

Some of the Kuta Area is prone to flooding, mainly due to the drainage system not being able to cope with constant tropical downpour's. One bad area is Poppies Lane II but they are working on the problem. Hotel grounds don't have the same problem.

Bali is close to the equator so it's always very humid. Take along some refresher towels on days of travelling for a brief relief from the heat.