Remember to bring your swimsuit, hat, sunscreen, beach towell, umbrella etc.
Toiletries and Medical Supplies: Insect repellant is a must. If the flies dont get you in the day, the mozzies will get you at night!
Photo Equipment: Dont forget your camera, spare batteries and film. However, if youve forgotten, dont stress! Like I said, you can buy it all here!
Luggage and bags:
If you are going down for the day and by car, all you need (especially in Summer) is some sort of light backpack, enough to put everyday stuff in...
In the summer you will need plenty of beach accessories. ie: suncream, towel, bottled water. And also, a lot of patience if you want to find a parking spot near the beach. Otherwise, you may find yourself doing a 10-15 minute walk to the beach (which isn't so bad, just be prepared for it...)