Top Experiences and Travel Essentials in Onna

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.

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55 results for Onna Water activities

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Reviews/Trip Moments

Reviews: 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]
Guest User2026-07-16
It was absolutely amazing! You could also purchase photos/videos and fish feeding. I bought everything and haven't regretted it for a second. The instructor was very attentive, explained everything, showed everything, and supervised the entire dive! Thank you so much for making my dream come true! The only thing I want to say is that the dive itself took about 30 minutes.
Reviews: Snorkeling experience at the Blue Cave in Onna, Okinawa (2 hr) - "Okinawa Blue Cave", no swimming skills required, beginner-friendly, shore entry to dive site
Guest User2026-07-17
There was a field to enter a Line or WhatsApp ID when booking, but I didn't receive any separate contact. It felt like it was just for emergency contact. When you arrive at the meeting point, the counter staff immediately confirms your reservation and prepares for snorkeling. The staff were all cheerful and great. There were already plenty of fish, but they scattered some food once, and the fish practically enveloped me! However, since there are only outdoor showers and changing rooms, it wasn't possible to take off all clothes and shower immediately after swimming. You can only rinse with water, dry yourself off, and change clothes.
Reviews: 2-hour diving experience at blue cave in Okinawa city, Japan: freediving/snorkeling + secret sea exploration + natural caves + Okinawa wave chasing
Guest User2026-05-20
Thanks to the wonderful instructor Kevin for his patience and involvement, he was able to make this new experience very enjoyable:))
Reviews: 4-Hour Blue Cave Scuba Diving/Snorkeling Experience in Naha, Japan [Naha/Chatan Pickup & Drop-off] Boat Transfer for Blue Cave Snorkeling/Scuba Diving Experience
Guest User2026-07-15
Please note that diving is not possible on the day you are flying back! Snorkeling is possible. This information was not mentioned in the notes on this website as of July 2014. The transfer staff were very kind, and the activities were excellent.