I have a small amount of work to do over Xmas and most companies are now closed until next year so I can spend my days enjoying myself and then work in the evening.
When the weather is warm in Melbourne you want to get as far away from the CBD as possible as the water is cleaner and the sand is softer.
I spent the day on Sandringham Beach which is a really nice beach about 40mins away from my flat. You can find a nice quiet pitch away from everyone and there are lots of refreshment options which is always a bonus and enables you to stay on the beach longer.
Sandringham Beach