There are roughly 200 islands sitting just off the Krabi coastline, some are small rocks jutting out of the sea, some are quite a lot larger but still remain uninhabited and some are large islands with many inhabitants living a normal life. You can rent a boat from Krabi town or Ao Nang and explore the islands on your own if you are a keen sailor. Alternatively you can rent a boat that comes with a guide so that you can relax whilst everything is taken care of. The best time of year to go is between November and April to avoid any unpredictable weather.

Cr. https://www.thecrazytourist.com/top-25-things-to-do-in-krabi-thailand/s