Are there day trips to the Similan Islands in the rainy season?

Day trips to the Similan Islands are generally unavailable during the rainy season (May to October), as the islands are closed for conservation. The best time for visits is from November to May, when weather conditions are favorable for snorkeling and diving. During the rainy season, rough seas can affect safety and accessibility, leading many tour operators to cancel trips. It's advisable to check with local operators for updates and book in advance for the dry season trips.