2026 Okinawa Diving Guide: A Seasonal Guide to Living in Harmony with the Ocean | DayDayGoodDays

When you come to Okinawa, diving is not just a trip, but a deep dialogue with nature. DayDayGoodDays has compiled the most complete sea condition and weather guide for 2026 to help you choose the best time to go diving.

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🌊 Seasonal Overview and Dressing Guide (Okinawa Dive Calendar)

month	Average air temperature	Water temperature(Water)	Gear is recommended.	Highlights
December	15 - 19°C	21 - 23°C	5mm+ Vest/Dryer	Humpback whale season , macro paradise, extremely high transparency
March - April	18 - 24°C	22 - 24°C	5mm full body	Seasonal change, abundant sea slugs, and fewer crowds
May - June	23 - 28°C	25 - 27°C	3mm / 5mm	Rainy season (brief showers), coral spawning, rising water temperature
July - August	28 - 33°C	28 - 30°C	3mm / Jellyfish suit	Peak summer , exceptional blue light, and the best time to photograph the Blue Hole.
September - October	26 - 31°C	27 - 29°C	3mm / 5mm	Typhoon season is approaching, water temperatures remain comfortable, and large fish are spotted.
November - December	18 - 23°C	23 - 25°C	5mm full body	The feeling of early winter snow, hammerhead shark season , leisurely pace

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📷 Professional Sea State Analysis

[Winter: January - March] A Clear Realm

• Climate: It is relatively cold with strong northerly winds, but this is when the "Okinawa Blue" is at its purest.

• Photography tip: Although the water temperature is low, the underwater visibility often exceeds 30 meters due to reduced plankton. This is the perfect time to practice wide-angle photography and capture whales .

• Good Days Reminder: We recommend bringing your own windproof jacket, as the temperature will be colder on land than underwater. We will provide hot tea to warm you up.

[Spring: April - June] Full of life

• Climate: May marks the start of the rainy season, but the rain in Okinawa usually comes and goes quickly.

• Photography tip: This is the breeding season for nudibranchs, making it an ideal time for macro photography .

• Good Days Reminder: Although air temperatures are rising, water temperatures are warming up more slowly. It is recommended to continue wearing a 5mm wetsuit to maintain body temperature.

[Summer: July - September] Intense sun and blue light

• Climate: The sunlight is at its most direct angle, and the blue beams of light in the Blue Cave are most breathtaking at this time.

• Photography tip: This is the golden period for photographing "God rays." The strong sunlight can make the underwater colors extremely saturated.

• Good Days Reminder: This is peak season, and we will optimize the scheduling and process to avoid extremely crowded times, giving you a better shooting environment. Remember to protect yourself from the sun and stay hydrated!

[Autumn: October - December] Calm and Big Things

• Climate: After the typhoon season ends, sea conditions become more stable.

• Photography tip: Starting in December, there is a chance to see groups of hammerhead sharks at some dive sites.

• Good Days Reminder: This is the perfect season for in-depth learning. The pace is slow, the atmosphere is great, and it's ideal for enrolling in courses to further your education.

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🛡 Safety First (Weather Guarantee)

In Okinawa, the weather determines the color of the sea.

• Weather Leave Policy: We strictly adhere to safety regulations. If sea conditions are unfavorable due to strong winds or typhoons, the entire store will be closed for the day, and we will never force anyone to go out to sea.

• Flexible adjustments: If the Green Cave is closed due to wind and waves, we will take you to a secluded dive site that is still calm (such as Gorilla Chop) depending on the wind direction that day, ensuring both safety and fun.

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"Be Ocean My Friend"

No matter how the sea conditions change, we teach you how to live with the waves.