St. Barths has a tidal difference of only 3 - 5 inches. The beaches vary according to ocean currents—the weather travels onto the island following the sun from the East. One of the main surfing beaches (Toiny) is known for its riptide, while Grand Fond is one of the island's only non-swimming beaches. Although tourism does not allude to it, there are a small variety of warm water sharks in the Caribbean. So, swimming at dusk and dawn or in murky waters is not recommended. Otherwise, scuba and snorkeling are a great way to see the nurse sharks, lobsters, conch and green sea turtles that abound in the waters surrounding St. Barths.