We had a half-day scuba diving experience on the morning of June 11th. Even though it rained heavily all morning, our instructor led us with great energy. The underwater scenery near Ishigaki Island was absolutely stunning; I'll definitely experience it again if I have the chance.
Anonymous User
Friend
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
6/20
Saturday
Patchy rain nearby
84.1°F/82.8°F
6/21
Sunday
Sunny
83.7°F/82.5°F
6/22
Monday
Partly Cloudy
82.9°F/81.9°F
6/23
Tuesday
Patchy rain nearby
83.4°F/81.3°F
6/24
Wednesday
Patchy rain nearby
83.3°F/82.3°F
6/25
Thursday
Patchy rain nearby
83.6°F/82.5°F
6/26
Friday
Patchy rain nearby
83.2°F/82.3°F
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