Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon and the Sun and the rotation of the Earth. The tides occur with a period of approximately 12 hours and 25 minutes, and with an amplitude that is influenced by the alignment of the sun and moon and the shape of the near-shore bottom.
Tidal changes on the East-Coast;
Every 6 hours the tide changes from high to low tide. This means with low tide the water will be drawn back up to the reef. The dept of the water left in the ocean will depend on the positioning of the moon. Around full moon the water is completely drawn back up to the reef.
So, around high tide you can swim everywhere. When the tide is going down you have a timeframe from around 4 hours around high tide to swim.
When it's low tide there are always options to swim around lagoon area's closeby.
