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Tide Window
Sharp Island Sandbar Crossing Times
The tombolo only emerges at low tide, letting you walk across to Kiu Tau. Below are the officially published times for the next seven days.
Emergence times over the next seven days (08:00 – 18:00)
Today
14:00 – 17:00
Sun 27/09
14:00 – 17:00
Mon 28/09
15:00 – 17:00
Tue 29/09
16:00 – 17:00
Wed 30/09
Not suitable
Thu 01/10
08:00 – 09:00
Fri 02/10
08:00 – 12:00
Times are the "Tombolo Emergence Time" published by the Hong Kong UNESCO Global Geopark, not our own estimate. View the Geopark page
Actual conditions are affected by wind, waves, air pressure and weather, and may differ from the published times. Allow ample time to walk back and never linger on the sandbar as the tide rises. Check Observatory warnings and the conditions on site before you set off, and judge for yourself whether it is safe.
Snorkeling tips
At around 1.6m tide height, water depth makes it harder to accidentally touch coral, with good visibility.
Wear a life jacket or use a buoyancy aid to avoid accidentally touching the seabed.
Be careful near shore — waves and boat wakes can push you into rocks and coral.
If the water is clearly too shallow when you arrive, please don't go in. Protecting the coral protects the ocean for everyone.
Coral facts
1–2cm
Average annual growth of hard coral
25%
Of marine life depends on coral reefs
Sharp Island has leaf, brain & daisy corals
Coral is extremely sensitive to temperature, water quality, light, and physical contact. A single touch can destroy years of growth. Coral reefs cover just 0.1% of the ocean's surface yet support around 25% of all marine species — making them one of the most important ecosystems on Earth.
Ocean-friendly behaviour
Don't touch coral — even a light touch causes damage
Don't stand on the seabed — stay buoyant and kick gently
Wear a life jacket or use a buoyancy aid to avoid accidentally touching the seabed
Don't take anything — no shells, rocks, or marine life
Don't feed the fish — it disrupts their natural feeding behaviour
Take all rubbish with you, including packaging
Move calmly — sudden movements startle marine life
Choose reef-safe sunscreen
Avoid
Oxybenzone · Octinoxate · Octocrylene · Benzophenone
Best choice: Kayarine UV shirts
UV shirts protect your skin more completely than sunscreen, with zero chemicals entering the ocean. Our in-house designed shirts are made for water activities — lightweight, quick-dry, and coral-friendly.
Shop Kayarine UV shirtsAbout this data
Tidal data is sourced from the Hong Kong Observatory's Ko Lau Wan (高流灣) tide gauge station. As there is no dedicated station at Sharp Island, figures are for reference only — actual water depth may vary. Always use your own judgement on site.
Data currently covers Sharp Island only. If you have snorkeling experience at other locations, we'd love to hear from you — contact us to share your knowledge and help more people.
Important: This tidal forecast only reflects water level based on Observatory data. Users must assess weather conditions independently — including wind strength, thunderstorm risk, currents, and other factors — before deciding whether water activities are safe.
Tidal data source: Hong Kong Observatory