Beach Weather
Comprehensive weather and environmental data for Koh Samui
22°-33°CAnnual Temperature
1950mmAnnual Rainfall
27°-30°CSea Temperature
52kmCoastline
JuneNow
June Weather
Monsoon SeasonGood Weather
Temperature24° - 31°CFeels like 32° - 34°C
Humidity85%very high
Rainfall135mm10 rainy days
Sunshine6 hrs/dayOvercast; brief sunny breaks
Wind22-30 km/hSouthwest monsoon
Waves1.2-1.8mModerate
Sea Temperature30°CExcellent
Water Visibility20-30mexcellent
Best For This Month
Rainfall Pattern:Monsoon; daily afternoon rain
UV Index
11Extreme
Peak Hours: 9 AM - 3 PM
Burn Time: 12-15 minutes
SPF 50+ sunscreen mandatory. Reapply every 2 hours.
Air Quality
62Moderate
PM2.5: 20-24 µg/m³
PM10: 30-35 µg/m³
Acceptable for most
Data based on 3-year averages (2023-2026). Actual conditions may vary. Always observe local flag warnings on the beach.