Guishan Island
Also known as: Turtle Island, Guishan Dao
Best time to dive
December to February
What you might see
- DolphinReliably seen
- Sea turtleLikely
Sightings are seasonal probabilities, not promises - even in peak season nature does its own thing.
Certification & difficulty
Advanced Open Water - advanced conditions (currents/depth); dive within your training.
Snorkelling
Not a snorkel site - Not confirmed at the vent itself; surface SUP/freedive trips to 'Milk Sea' are offered by some boat operators
Safety notes
Strong/unpredictable currents, fishing-net entanglement, heavy tour-boat traffic, very low visibility possible at vent; carry SMB, backup light, dive knife
Permits & fees
Island landing (tourism/hiking) requires online application via https://events.necoast-nsa.gov.tw/coast/index.aspx, daily cap ~1800 visitors in 4 slots, closed Wed, landing fee NT$100, group-tour format only; unclear whether a separate permit applies to dive boats that do not land divers ashore - VERIFY with operator
Permits and operators change - confirm before booking.
Location
Nearest hub: Longdong/Toucheng
This profile is desk research, compiled from public sources - not a first-hand dive report. Coordinates are approximate.