Diving is the most popular water sport in Sri Lanka. Beacuse Sri Lanka has many amazing creations of Mother Nature sea found on this tropical island. the safty places for diving,They are Unawatuna, Galle, Hikkaduwa and many other places. If you can see the corals in the hikkaduwa beach . From November to April can dive on down south and eastern part of Sri Lanka . All around the country there are truly amazing diving sites have been recorded.