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Yonaguni Island

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Yonaguni Island Weather, Climate and Best Time to Visit

Data source：Meteostat
Update date：2025-09

Yonaguni Island year round climate

  • Spring (March–May): Average 21.3–25.1°C, mild and comfortable climate, abundant sunshine, moderate rainfall. Common activities: diving, snorkeling, sightseeing. Recommended clothing: light long-sleeved clothing, light jacket.
  • Summer (June–August): Average 28.0–29.6°C, hot and humid, occasional showers. Common activities: swimming, surfing, water sports. Recommended clothing: light and breathable clothing, swimwear, hat, sunscreen.
  • Autumn (September–November): Average 25.9–27.4°C, comfortable temperature, but September has heavier rainfall. Common activities: diving, snorkeling, sightseeing. Recommended clothing: light long-sleeved clothing, light jacket.
  • Winter (December–February): Average 19.0–20.3°C, relatively low temperature, occasional rainfall. Common activities: diving, sightseeing. Recommended clothing: light jacket, long-sleeved clothing.

Yonaguni Island climatological average

Annual average temperature: approx. 24.4°C / Annual rainfall: approx. 2348 mm / Summer humidity: 70%–80% / Rainiest month: September

Yonaguni Island monthly average temperature and precipitation

Month
Air temperature (°C)
Precipitation (mm)
January
19°C
185
February
19.7°C
166.7
March
21.3°C
99.3
April
24°C
139.4
May
25.1°C
206.4
June
28°C
203
July
29.6°C
107.7
August
29.2°C
108.3
September
27.4°C
404.9
October
25.9°C
263.5
November
23.8°C
233.7
December
20.3°C
230.1

Yonaguni Island weather for the next seven days

6/4
Thursday
Patchy rain nearby
28.4°C/27.8°C
6/5
Friday
Moderate rain
27.2°C/25.9°C
6/6
Saturday
Patchy rain nearby
27.5°C/27.1°C
6/7
Sunday
Patchy rain nearby
27.9°C/26.8°C
6/8
Monday
Moderate rain
27.8°C/26.9°C
6/9
Tuesday
Moderate rain
28.4°C/27.1°C
6/10
Wednesday
Moderate rain
28.2°C/27.8°C

Yonaguni Island Frequently Asked Questions and Useful Information for Travel

What is Yonaguni Island famous for?

Yonaguni Island is celebrated as Japan's westernmost municipality, a premier destination for billfish fishing and world-class diving. It gained further renown with the 1987 discovery of the Yonaguni Monument, a mysterious underwater rock formation that some speculate may be of artificial origin.

How do you get to Yonaguni Island?

Access to Yonaguni Island is available by air and sea. Flights typically depart from Naha Airport and take approximately 90 minutes, or a shorter 30-minute flight from Ishigaki Airport. Alternatively, a ferry service operates from Ishigaki Port, with a journey time of about four hours, usually running on Tuesdays and Fridays.

Who administers Yonaguni Island?

Yonaguni Island, also known as Yonaguni-jima in Japanese, is part of the Yaeyama Islands archipelago. It holds the distinction of being the westernmost island of Japan, situated strategically between the East China Sea and the Philippine Sea.

Can you see Taiwan from Yonaguni Island?

Yes, on exceptionally clear days, it is possible to see Taiwan from Yonaguni Island, as they are located less than 110 km apart. The mountainous landscapes of Taiwan become visible across the water, particularly when viewed from Yonaguni's westernmost point, such as Cape Irizaki. Optimal visibility conditions include clear, sunny weather with minimal clouds and calm winds and seas.

What are the main attractions on Yonaguni Island?

Yonaguni Island is renowned for its dramatic natural landscapes and unique marine life. Key attractions include the enigmatic Yonaguni Monument, an underwater rock structure that sparks much debate, and its reputation as a top diving spot, particularly for those seeking encounters with hammerhead sharks. The island's remote location also offers stunning, unspoiled coastal scenery.