Best Time and Season Guide for Year-Round Diving in the Kerama Islands Okinawa Japan

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Kerama Islands Boat Tour

Diving All Year Round

The Kerama Islands are a year-round diving destination. No matter when you visit—spring, summer, autumn, or winter—you can enjoy diving with average visibility of 20 meters or more and calm waters at sheltered dive sites. Divers of all experience levels, from beginners to experienced divers, can enjoy the underwater world of the Kerama Islands.

At GOLD Scuba Diving, we specialize in diving in the Kerama Islands and offer daily boat diving tours to the islands. We welcome guests from all over the world and take them on unforgettable diving adventures in the Kerama Islands.

For more information, please check our Tour Details page.

≫Kerama Islands Diving Tour

What Changes Depending on the Season?

When diving in the Kerama Islands, there are no major changes in the underwater environment throughout the year. The biggest seasonal difference is the water temperature.

The water temperature is around 21°C at its coldest in winter and can reach approximately 29°C at its warmest in summer.

There are also no major seasonal differences in marine life. Most of the marine species found in the Kerama Islands can be seen throughout the year, so you can enjoy a wide variety of underwater life regardless of when you visit.

Seasonal Overview and Water Temperature GuideWater Temperature Guide

In the Kerama Islands, typical water and air temperatures are as follows:

Spring (March–May)

Water: 21–24°C | Air: 22–30°C
Visibility: 20 meters or more

In March, the water is still relatively cold, but by around the end of May, the water temperature reaches approximately 25°C.

Summer (June–September)

Water: 25–29°C | Air: 25–31°C
Visibility: 20 meters or more

The water temperature is at its warmest, making this one of the best times of year for diving. Sea conditions are often calm, although it is also typhoon season.

Autumn (October–November)

Water: 25–27°C | Air: 24–29°C
Visibility: 20 meters or more

Even in autumn, the sea remains warm, making for comfortable diving conditions.

Winter (December–February)

Water: 21–22°C | Air: 18–24°C
Visibility: 20 meters or more

There are many days with northerly winds, so we often visit dive sites on the southern side of the islands. Since it is the off-season in Japan, the boats are generally less crowded, making for a more relaxed and comfortable diving experience.

Kerama Islands Water and Air Temperature Guide

Rental wetsuits are available in 3mm and 5mm. Inner layers can also be used during colder water temperatures.

You can check the most recent water temperatures in our daily dive logs.

≫Dive Log

Kerama Islands Diving Tour Details

For full details about our Kerama Islands diving tours, please visit the page below.

≫Kerama Islands Diving Tour

How to Join a Diving Tour in the Kerama Islands

To join a diving tour in the Kerama Islands, please contact us and make a reservation in advance.

On the day of your dive, we provide free pickup and drop-off by car before and after the diving trip. Our pickup service is available within Naha City only, so if you plan to join our diving tour, please stay at a hotel in Naha City.

Why Choose GOLD Scuba Diving

Professional, experienced local guides
Simple and straightforward pricing
All rental equipment is included for free
Free underwater photos

Leave your Kerama Islands diving experience to us, the Kerama Islands diving specialists! Our experienced local guides know the dive sites inside and out and will take you to the best spots depending on the conditions.