I was there in 2017 and I really enjoyed Sea surfing.if you are planning to go SL don't miss Hikkaduwa beach and night stay on unawatuna beach.Srilankan water Surfing is world popular.only one thing was very irritating in SL that everywheree you have pay entry fees if you are travelling there you have carry lots of cash for pay entry fees that's y my suggestion is spend your maximum day on costal side of SL than you can enjoy a lot in minimum expenses