

Discover 55 Water activities in Onna on Trip.com, updated 18 July 2026, with experiences lasting from 1 to 4 hours. Find the perfect adventure for your day!
From S$ 37.29 per person, with an average total of S$ 60.61. Choose the option that suits your plan.
With 298 verified reviews, Water activities Onna boast an average rating of 4.8.
This week's most popular Water activities: "2-hour diving and snorkeling experience at the blue cave in Okinawa city, Japan [blue cave snorkeling/diving/English and Japanese instructors/shore entry to avoid seasickness]", with 278 reviews and a 4.8 rating.
Now on Trip.com: "2-hour diving and snorkeling experience at the blue cave in Okinawa city, Japan [blue cave snorkeling/diving/English and Japanese instructors/shore entry to avoid seasickness]", a 2-hour adventure in Onna!
The next available day tour departs on 19 July 2026. Book now to secure your spot!
Onna Water activities usually take about 2 hours — perfect for a relaxed, immersive experience!
100% of Onna Water activities now offer English-speaking guides
July is perfect for visiting Onna! Choose from 55 available day tours, including seasonal hits like 2-hour diving and snorkeling experience at the blue cave in Okinawa city, Japan [blue cave snorkeling/diving/English and Japanese instructors/shore entry to avoid seasickness].
Your trip, worry-free! All day tours are run by licensed suppliers with verified reviews, and many include free cancellation before departure.
















































































![0.5-hour diving and snorkeling experience at blue cave in Okinawa city, Japan [multilingual instructor + souvenir photo included]](https://ak-d.tripcdn.com/images/0353v12000sh4cr4mE14B_C_568_320.png?_fr=wc)





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