daiku Miyakojima enjoys a warm climate throughout the year, making it a beloved resort destination for visitors from around the world. Especially captivating is the “Miyako Blue” — the island’s famously clear and vivid blue ocean.
This article details the charms of Miyakojima’s sea and essential tips for safely enjoying the waters year-round.
The Charm of Miyakojima’s Ocean
The Miracle of “Miyako Blue”
Miyakojima boasts some of the world’s highest ocean transparency.
The breathtaking blue, combined with pure white sandy beaches, is known as “Miyako Blue.”
Stretching endlessly before you, the crystal-clear ocean captivates all who visit.
Through snorkeling and diving, you can encounter vibrant coral reefs and colorful tropical fish up close.
Popular Beaches
Yonaha Maehama Beach
A vast, approximately 7-kilometer stretch of pristine white sand with stunningly clear waters.
Popular for activities such as parasailing and stand-up paddleboarding (SUP).
Aragusuku Beach
A gentle, shallow beach featuring extensive coral reefs, ideal for beginner snorkelers.
Here, you can easily observe a wide variety of vivid tropical fish.
Sunayama Beach
After crossing a sand dune, you’ll discover a hidden gem — a natural rock arch framing the vivid blue sea.
This picturesque spot is also a favorite for photography enthusiasts.
How to Enjoy Miyakojima’s Ocean Year-Round
Sea Temperature and Climate by Season
- Summer (June–September)
Air temperature: over 30°C, Sea temperature: 28°C–30°C
→ The liveliest and most popular season. Swimming in just a swimsuit is comfortable. - Autumn (October–November)
Air temperature: 25°C–28°C, Sea temperature: 25°C–28°C
→ While the air cools slightly, the sea remains warm.
This is a quieter season perfect for a relaxed visit. - Winter (December–February)
Air temperature: 18°C–22°C, Sea temperature: 20°C–23°C
→ Wearing a wetsuit makes swimming comfortable.
Many snorkeling and diving tours operate even during winter. - Spring (March–May)
Air temperature: 22°C–27°C, Sea temperature: 23°C–25°C
→ As sea temperatures rise, swimming becomes pleasant again.
Beach opening ceremonies are often held during this period.
About the Typhoon Season
- Period: Mainly June to October
- Precautions:
When a typhoon approaches, ocean conditions can deteriorate rapidly.
High waves and strong winds make marine activities extremely dangerous.
Always check weather forecasts and follow the guidance of your accommodation staff.
How to Enjoy the Ocean Safely in Miyakojima
Important Safety Points
- Jellyfish
From summer to autumn, watch out for hazardous jellyfish like the box jellyfish.
Choose beaches with jellyfish nets when possible and consider wearing a rash guard.
Carrying vinegar or a first-aid spray for jellyfish stings is also recommended. - Rip Currents
Powerful currents can unknowingly pull swimmers away from shore.
If caught in a rip current, do not swim against it.
Swim parallel to the shoreline to escape, or stay afloat and wait for rescue if needed. - Availability of Lifeguards
Except for some beaches in summer, most beaches in Miyakojima do not have lifeguards year-round.
Especially during winter, you must swim at your own risk and take extra caution.
Clothing and Equipment Guide
- In Summer
→ Wear a rash guard, hat, sunglasses, and use sunscreen.
Bringing beach sandals is also recommended. - In Winter
→ To maintain body temperature, wear a wetsuit or a thicker rash guard.
A windbreaker is also useful to guard against chilly winds. - Items to Bring Year-Round
→ Drinking water, a first-aid kit, and a waterproof bag are essential for peace of mind.
Mindset for Enjoying the Ocean
- Check the Weather and Sea Conditions in Advance
Always review the day’s weather forecast and sea conditions before heading out, and avoid taking risks. - Respect Beach Rules
Each beach has its own rules and etiquette.
Please take your trash with you and help protect the natural environment.
Conclusion
Miyakojima’s ocean is a truly special place that offers unforgettable experiences year-round.
However, because nature can be unpredictable, appropriate safety measures according to the season and weather are essential.
Prepare well and enjoy the stunning “Miyako Blue” waters while creating wonderful memories.
