Beach Hack #1: Bring a Tent
Bring an easy-to-carry tent to the beach. Dig a hole and then place the tent on top of it. Fill it with salt water for a cool resting place and "beach" play area for your kids.
The downside of this though is that the water gets easily absorbed by the sand. Most especially during extremely hot weather. So make sure to check the hole from time to time and pour water into it to keep it from drying. You should also keep your kid hydrated to prevent them from getting heat stroke. Make sure your child's head is wet all the time to keep him/her cool.
The best time to pitch a tent is from 7 am to 10 am when it is not overly hot.