Best time to visit Koh phi islands is between November to April
Karbi best time to visit is December to March
Bangkok best time to visit is between November to February Bali May to September though august is called as dry month and Thailand best time to visit is between November to April.
The peak tourist season is between November and April and it's also the ideal time to visit Phi Phi. The weather is comparatively cooler and pleasant with occasional light to heavy showers. Phi Phi experiences its peak summer season between January and April.