When exactly should I do the Hon Yen low tide walk?
Go on the 1st or 15th of the lunar calendar — new moon or full moon — between January and June. Arrive at the shore before 7am. The tide drops lowest around those dates, exposing enough reef to walk across. The window closes as tide returns, usually by 9–10am. Outside January–June the tide doesn't drop far enough, and September–December is storm season.
The Hon Yen low tide walk is one of those experiences that requires a calendar. You can’t just show up — you need to be at the right place on the right day at the right hour. Here’s exactly how to time it.
The lunar calendar method
The most reliable approach is the simplest: go on the 1st or 15th of the lunar calendar (âm lịch). These are the new moon and full moon dates — the moments when the moon’s gravitational pull is strongest, producing the deepest low tides of the month.
In the Vietnamese lunar calendar, the 1st is the new moon (trăng mới) and the 15th is the full moon (trăng rằm). A lunar calendar is included in most Vietnamese smartphone keyboards, and plenty of free apps show it. Two or three days around each of these dates also produce usable tide levels, not just the exact day.
The seasonal window
The walk is only possible from January through June. Outside these months:
- July to August: The tidal pattern shifts — low tides still occur but don’t drop far enough to expose the reef path at a manageable wading depth.
- September to December: Storm season. Even if the tide cooperated, sea conditions near Phu Yen are dangerous in this period.
January through April is the ideal window: lowest tides, clearest water, and calm weather throughout.
Time of day
Arrive at the shore before 7am. The lowest point of the tide typically occurs in the early morning hours during the dry-season lunar dates in this region. By 9am the tide is returning, and by 10am the path begins to submerge again.
The exact low tide time shifts by roughly 45–50 minutes each day, so “6:30am on the 1st” might be “7:15am on the 3rd.” If you’re planning a specific day, check a tide app for the exact low tide time in Tuy An or An Hoa.
Checking a tide app
- Download any tide app (Tides Near Me, Tide Alert, or similar)
- Search for “Tuy An” or “An Hoa” near Phu Yen province
- Look at your planned date — you want a Low Tide reading as low as possible, ideally below 0m on the local tide gauge scale
- Note the time of lowest tide — that’s when to be standing at the water’s edge
The 1st and 15th lunar dates will show lower readings than surrounding days. If your planned date isn’t one of these, check whether the tide reading is still deep enough (ask a local or your guesthouse host).
Practical checklist
- ✅ Date: 1st or 15th lunar month (or 2–3 days around it)
- ✅ Month: January to June
- ✅ Arrive: before 7am at An Hoa shore
- ✅ Footwear: reef shoes or thick-soled sandals — coral cuts
- ✅ Return time: be back on shore by 9–9:30am at the latest
- ✅ Check night before: ask your guesthouse host about current conditions
What if the timing doesn’t align with your trip?
If your travel dates fall outside the optimal window, the view of Hon Yen from shore is still worth the drive — the island and surrounding reef are visible from the beach even when submerged. Ganh Da Dia, 20 minutes south, is the main attraction in the area and has no tide dependency.