June · Thailand
Best time to visit Koh Samui in June Weather, crowds & prices
Weather in Koh Samui in June
Average temperature 26°C, 72 mm of rain, about 27 days with 6+ hours of sunshine and 75% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
June score
8.8/10
Ranked #3 of 12 months
- Avg temp
- 26°C
- Rainfall
- 72 mm
- Humidity
- 75%
- Days with 6h+ sun
- 27
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
June in Koh Samui scores 8.8/10 for beach and coastal travel - one of the top 12-month picks (#3). Expect around 26°C, 72 mm of rain, and roughly 27 days with 6+ hours of sunshine this month.
Koh Samui's ring road links Chaweng's beach, Bophut's Fisherman's Village, and the Big Buddha on the north coast.
June is one of the strongest months in Koh Samui (3rd)
Days in June average 26°C (79°F) and humidity near 75% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
Budget for roughly 72 mm of rain this month — a flexible day or two helps — with about 27 days with 6+ hours of sunshine and 12.7 hours of daylight to work around it.
On our climate-comfort scale this is one of the strongest months of the year for Koh Samui at 8.8/10 (3rd of 12), just behind March at 9.3/10.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a packable rain layer.
Budget for mid-season pricing, and crowds are moderate.
Frequently asked
- What is the weather like in Koh Samui in June?
- In June, Koh Samui averages 26°C, 72 mm of rain, and about 27 days with 6+ hours of sunshine. Its climate-comfort score is 8.8/10.
- Is June a good time to visit Koh Samui?
- June earns a 8.8/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Koh Samui in June?
- Expect about 72 mm of rain in June. Average humidity is 75% and there are about 27 days with 6+ hours of sunshine.
Curated in Koh Samui
Tickets & experiences
Things to do in Koh Samui
Koh Samui, Thailand. Live activities and tours from GetYourGuide, matched to this destination.