This time, due to a less-than-ideal weather assessment, we opted for canyon rafting instead. Our guide was one of the few who spoke English, and he was excellent. He was very patient in explaining things and providing transportation, and I even mustered the courage to jump into the water (I'm a complete landlubber and terrified of water). I also met some very cute group members; it was so adorable and fun! ❤️
Anonymous User
Solo traveler
Iriomote Island Weather, Climate and Best Time to Visit
Data source:Meteostat Update date:2025-09
Iriomote Island year round climate
Spring (March–May): 21.6–25.7°C on average, warm and humid with occasional showers. March and April offer pleasant weather, while May sees increased rainfall. Popular activities: Diving, snorkeling, birdwatching. Recommended clothing: Light long-sleeved clothing, sun protection, rain gear.
Summer (June–August): 28.7–30.3°C on average, hot and humid with frequent afternoon showers or thunderstorms. Sea breezes offer some relief. Popular activities: Water activities (e.g., swimming, canoeing, kayaking), jungle trekking. Recommended clothing: Light and breathable clothing, sun protection, hat, rain gear.
Autumn (September–November): 24.4–28.8°C on average, mild weather, but September experiences heavier rainfall. October and November offer pleasant weather ideal for outdoor activities. Popular activities: Hiking, maple leaf viewing (in some areas), diving, snorkeling. Recommended clothing: Light jacket, long-sleeved shirt, comfortable shoes.
Winter (December–February): 19.3–20.4°C on average, relatively warm with occasional showers. Mild weather is suitable for outdoor activities, but warm clothing is recommended. Popular activities: Diving, snorkeling, birdwatching. Recommended clothing: Light warm clothing, jacket.
Iriomote Island climatological average
Annual average temperature: approx. 25°C / Annual rainfall: approx. 2232 mm / Summer humidity: 75%–85% / Rainiest month: September
Iriomote Island monthly average temperature and precipitation
Month
Air temperature (°C)
Precipitation (mm)
January
19.3°C
96.7
February
20°C
123.3
March
21.6°C
98.3
April
24.6°C
113
May
25.7°C
333.7
June
28.7°C
195.7
July
30.3°C
148.3
August
30.1°C
177.3
September
28.8°C
354
October
27°C
231.7
November
24.4°C
203.3
December
20.4°C
157
Iriomote Island weather for the next seven days
11/21
Friday
Patchy rain nearby
23.3°C/22.6°C
11/22
Saturday
Patchy rain nearby
23.4°C/22.6°C
11/23
Sunday
Patchy rain nearby
24.3°C/23.7°C
11/24
Monday
Patchy rain nearby
24.5°C/23.8°C
11/25
Tuesday
Patchy rain nearby
22.6°C/20.2°C
11/26
Wednesday
Patchy rain nearby
23°C/21.3°C
11/27
Thursday
Patchy rain nearby
23.7°C/22.1°C
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