Thailand's Andaman coast strings Phuket's Patong nightlife, Phang Nga Bay's James Bond Island and limestone cliffs, the Phi Phi Islands of Maya Bay, and Krabi's Railay rock-climbing peninsula accessible only by long-tail boat.
Northeast monsoon dry season with Phang Nga Bay sailing at peak, Phi Phi Islands accessible without rough seas, and Christmas through New Year at peak resort demand.
Southwest monsoon brings afternoon storms and rough seas, Maya Bay closes during certain months for reef recovery, but Phuket west-coast hotels stay open with reduced rates.
Hot dry season with sea calmest, Krabi rock-climbing season at Railay's limestone walls at peak, and the Andaman dive sites at maximum visibility.
Songkran Thai New Year mid-April brings water-fight street parties to Patong and Krabi, with Phuket's beach culture continuing through the celebrations and the rains beginning to build.