You will experience white water rafting in Kithulgala which is one of the wettest place in the country. This is located 90 km from Colombo. October to May is the best time for dive in the west and south-west coast . The whole of the south coast of Sri Lanka is filled with adventurous sports like snorkelling. For the best experience, you can try snorkelling in Hikkaduwaa, Weligama and Kirinda. The best time to indulge in this activity is March, April or May.To get the thrilling experience of surfing you should go to Weligama beach. You can also try other beaches like Arugm Bay, Hikkaduwa, Unawatuna and much more to list.best time to visit here during November and April. Kite Surfing experience in Kalpitiya sea plane rides are available from Colombo, Bentota, Batticaloa, Dickwella, Kandy, Koggala, Sigiriya, Trincomalee and many other cities. Negombo and Hikkaduwa are the two best places for wake boarding.