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Kohamashima Island

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Kohamashima Island Weather, Climate and Best Time to Visit

Data source：Meteostat
Update date：2025-09

Kohamashima Island year round climate

  • Spring (March–May): Average 70–78°F, warm and comfortable climate, increasing rainfall, with May being the wettest month. Common activities: snorkeling, diving, beach walks. Recommended clothing: light and breathable clothing, a light jacket for backup.
  • Summer (June–August): Average 83–86°F, hot and humid, moderate rainfall. Common activities: swimming, water sports, stargazing. Recommended clothing: light short-sleeved shirts, shorts, swimwear, sunscreen is essential.
  • Autumn (September–November): Average 75–83°F, pleasant climate, September is the wettest month, rainfall decreases after October. Common activities: diving, snorkeling, hiking. Recommended clothing: light and breathable clothing, a light jacket is needed for mornings and evenings.
  • Winter (December–February): Average 66–68°F, warm and comfortable, less rainfall. Common activities: diving, snorkeling, beach walks. Recommended clothing: light clothing, a light jacket is needed for mornings and evenings.

Kohamashima Island climatological average

Annual average temperature: approx. 77.2°F / Annual rainfall: approx. 2232 mm / Summer humidity: 75%–85% / Rainiest month: September

Kohamashima Island monthly average temperature and precipitation

Month
Air temperature (°F)
Precipitation (mm)
January
66.7°F
96.7
February
68°F
123.3
March
70.9°F
98.3
April
76.3°F
113
May
78.3°F
333.7
June
83.7°F
195.7
July
86.5°F
148.3
August
86.2°F
177.3
September
83.8°F
354
October
80.6°F
231.7
November
75.9°F
203.3
December
68.7°F
157

Kohamashima Island weather for the next seven days

12/18
Thursday
Patchy rain nearby
72.1°F/71.3°F
12/19
Friday
Patchy rain nearby
74.7°F/71.9°F
12/20
Saturday
Moderate rain
75°F/70.4°F
12/21
Sunday
Patchy rain nearby
74.2°F/72°F
12/22
Monday
Patchy rain nearby
71.6°F/70.7°F
12/23
Tuesday
Patchy rain nearby
73.5°F/72.1°F
12/24
Wednesday
Patchy rain nearby
72.8°F/68.4°F

Kohamashima Island Frequently Asked Questions and Useful Information for Travel

What is Kohamashima Island famous for?

Kohamashima Island is renowned for its picturesque landscapes and its connection to the popular Japanese TV drama 'Churasan.' Many visitors are drawn to the island because of the drama, with historical sites like Kohaguraso, a traditional house in the island's sole village, being significant tourist attractions as the drama was filmed there.

Is Kohamashima Island a good destination for snorkeling?

Yes, the waters surrounding Kohamashima Island are an excellent spot for snorkeling. The ocean is teeming with vibrant coral reefs and a diverse array of fish. Donning a snorkel allows you to immerse yourself in a world of colorful tropical marine life just off the beautiful beaches.

What language is spoken on Kohamashima Island?

The primary language spoken on Kohamashima Island is Yaeyama. This dialect is part of the Ryukyuan languages and is spoken across the Yaeyama Islands. While there are variations and potential complications with mutual intelligibility between dialects due to the geographic spread, Yaeyama is the distinct language of the region.

What are the must-see sights on Kohamashima Island?

A key attraction on Kohamashima Island is Kohaguraso, a historic traditional house located in the island's only village. This site holds particular significance as it was a central location for the popular Japanese TV drama 'Churasan,' drawing many fans and tourists who wish to experience the settings from the show.

What kind of marine life can be found when snorkeling around Kohamashima Island?

When snorkeling around Kohamashima Island, you can expect to see a spectacular variety of marine life. The vibrant coral reefs are home to countless colorful tropical fish, creating a breathtaking underwater spectacle for snorkelers to enjoy.