The Kerama Islands lie just off Naha and are the best-known place for snorkeling and diving in Okinawa. The group of islands became a national park in 2014, and the water around them is famously clear, often described as Kerama Blue. A day trip leaves from Naha, crosses to the islands by boat and spends the day in the water at a choice of reef spots, with time on the beach and a break for lunch. Snorkelers can expect coral gardens, schools of tropical fish and a good chance of seeing sea turtles, which are regulars in the shallows. The linked trip is a full-day excursion of around nine hours from Naha and is suitable for confident and beginner swimmers, with guides, equipment and safety briefings handled by the operator.
Understand the logistics before you book. Boats leave from the port in Naha in the morning and return in the late afternoon, and the crossing takes under an hour for the closest islands, depending on the vessel. The itinerary is flexible because operators choose the best spots for the day's wind and tide, which is why the trip descriptions name the park rather than a single beach.
Check the meeting time and place on your confirmation, arrive early and bring a towel, swimwear, reef-safe sunscreen and some cash for extras. If conditions are rough, operators can change plans or cancel, and your confirmation explains what happens in that case.
Season matters. The summer months have the warmest water and calmest seas, but this is also typhoon season, so schedules can shift. From late autumn the water is cooler and wetsuits make snorkeling comfortable, and the crowds are thinner than in the peak holiday weeks. From roughly January to March humpback whales visit the Kerama waters, and separate whale-watching trips run in that window. Good swimmers will enjoy the full day, but if you are nervous in open water, ask the operator about life vests and shallow entry points.
Pack light, wear a rash vest or wetsuit if offered, and take motion-sickness tablets if you are prone to seasickness, since the crossing can be bumpy. The islands have a few small villages with shops, and Zamami, Tokashiki and Aka are the usual stops. Combine this trip with a relaxed day in Naha either side and keep a flexible schedule in case the weather forces a change of date.
What to expect
The experience
A guided boat day from Naha to the Kerama Islands, with snorkeling at a choice of reef spots, beach time and lunch.
Best time
Late spring through autumn for the warmest water, with calmer seas outside typhoon weeks.
How long
About nine hours door to port, including the boat crossings.
Tips
Bring swimwear, a towel and reef-safe sunscreen, take motion-sickness tablets if needed, and keep your date flexible in case weather moves the trip.
Quick picks
- Best for
- Swimmers and snorkelers who want the best water in Okinawa without staying overnight on the islands.
- Families
- Suitable for older children who swim well and wear life vests, but a full day on a boat is long for toddlers.
- Couples
- Clear water, beach time and a sunset ferry back make for a memorable day together.
- Pair with
- A quiet evening in Naha, Kokusai Street for dinner, and Shuri Castle Park the next day.
- Time needed
- A full day, with Naha either side.
Good questions
Where do the boats to the Kerama Islands leave from?+
Day trips leave from the port in Naha and reach the nearest islands in under an hour. Check the meeting time and place on your confirmation and arrive early.
Can beginners snorkel in the Kerama Islands?+
Yes, guides provide equipment and a safety briefing, and many reef spots are shallow. Tell the operator if you are nervous so you can use a life vest.
What is the best season for the Kerama Islands?+
Summer has the warmest water but also typhoon season, so schedules can change. Late spring and autumn offer a good balance, and wetsuits keep you comfortable when the water cools.
Will I see sea turtles?+
Sea turtles are regular visitors to the shallows, so there is a good chance, but wildlife can never be guaranteed. Guides know the likely spots.
What if the weather is bad?+
Operators can change the plan or cancel when conditions are unsafe. The booking page explains the options, so check it before you go.
