Radhanagar beach is one of the top beaches in Asia south pacific and journey to Havelock is incomplete without it. Its the most beautiful beach I have ever seen in my life, when you enter the gate and you get the first glimpse of the sea across the Mahua trees you will feel you are watching a bollywood song on some foreign location!! :) Crystal clear sky blue color water, pure white sand, absolutely clean beach side. Its not much crowded n not commercialized. Sea is flat to a far distance so its safe even for non-swimmers with waves always keen to cuddle with you, although some can be bit hard-hitting be careful if you are with small children. You can even simply take a long-long barefooted walk on soft white sand or just relax lying down there. There are lots of small food joints outside the main gate, you can get snacks, tea, lunch-thali n bananas. You will not feel like leaving even after spending hours, although beach closes for access after evening don't forget to see the sunset, its damn beautiful. There are no water sports though. Some of the good facilities I saw around:
1) Police personnel for your safety
2) Life guards keeping a watch on you
3) Pay n use lockers
4) Open Showers
5) Pay n use Changing rooms
6) First-Aid and nurse
7) Vehicle parking inside the main gate
8) Comfortable benches and other dedicated, covered sitting areas
I would recommend rent a bike if you are staying in Havelock and take a ride to this beach, its breathtaking passing through beautiful villages, ever happy-singing-welcoming trees!