Flat Island Beach offers clear waters that are generally suitable for swimming and excellent for snorkeling, given its proximity to the marine park boundary. As an island beach, it's exposed to open water, so conditions can vary. There are no lifeguards or facilities, so swimmers should be cautious of currents and boat traffic. Always assess the water conditions before entering and avoid swimming alone.

The best time to visit Flat Island Beach for optimal weather and marine exploration is during the cooler, drier months when the sea is typically calmer and visibility for snorkeling is at its peak. Visiting on weekdays will ensure a more secluded experience, as this hidden island beach can attract more boaters on weekends. Always check weather forecasts for calm seas before planning your trip.

Flat Island Beach is exclusively accessible by boat or kayak. There are no land-based access routes. Visitors typically charter a private boat, join an organized tour, or paddle by kayak from Hoi Ha Village or other nearby launch points. This boat-only access reinforces its hidden and remote character, making it a destination for those with their own watercraft or who arrange transport.

Flat Island Beach is a completely undeveloped natural island, meaning there are no food or lodging facilities available on the island itself. Visitors must bring all their own provisions, including food, water, and any necessary equipment for a day trip. There are no shops, restaurants, or accommodation options nearby, so thorough preparation is essential for a comfortable and self-sufficient visit.

Flat Island Beach is unique due to its status as a small island landing beach situated near the boundary of the Hoi Ha Wan Marine Park. Its isolated location and boat-only access contribute to its pristine condition and rich marine life, making it a prime spot for snorkeling and exploring the marine park's biodiversity. It offers a true sense of discovery and escape for those willing to make the journey.