is a beach in the southeast of Phangan island, Thailand. It is also known as Leela Beach
. This is a quiet and cozy spot, located within a walking distance from Fullmoon Beach (Haad Rin). It is beautiful ashore. But the swimming is not very comfortable, since the water is shallow. In addition, there are many sea urchins and algae on the bottom. Shore and seabed: sand. 
In the hotels of Rinnai beach, rooms' rates starts from US$40 per night. This is the perfect place to stay overnight during the Full Moon Party. Find hotels in Rin Nai
How to get there 
You may get from Bangkok to Phangan island by Lomprayah
high-speed catamaran. But the best is to fly to Samui island, and next get by ferry from Maenam beach to Phangan island.
There are two options to fly from Bangkok to Samui:
1. Direct flight to Samui Airport (USM)
. This way is most convenient, but also the most expensive.
2. Fly to Surat Thani airport (URT)
low-coster. Then get by taxi (1200 bahts) to Donsak Pier
. Then get to Samui by any ferry (Raja ferry
is the best, but other services are also good). It is the best value for money
way of getting to Koh Samui, but takes a little longer time, as the road from Suratthani airport to Samui takes a few hours. Find flights to Rin Nai
When to go 
The best time for a beach holiday in Pha-ngan island is a dry season from January to April, as well as second dry season from June to September.
Water temperature, C
Wind speed, meter/sec