When is the best time to visit the Similan Islands?
While the park is open from November 1st through May 15th, the most popular time to visit is in December and Early January. However the least amount of rain, and the smoothest water is in Late February through Mid March. Temperatures start to rise, but the seas are very calm and the evenings are nearly perfect! There is always the chance of a bit of rain, and you will certainly need your sunscreen…but this is certainly the best time to visit the Similan Islands!
Diving and snorkeling is usually equally nice in the summer months, but it may be a good idea to carry some rain gear like a poncho for transportation between the boat and the car! It’s also very difficult to make it to the Similan Islands due to winds and waves. There are no day trips running. Be very WARY of companies that offer Day trips during these months. One shop in Khao Lak (Thai owned and operated) has sunk their Speedboat operating in the monsoons.