Koh Samui in June
In June, Koh Samui averages 30°C (86°F) during the day and 27°C (80°F) at night, with frequent rain — about 27 days of the month see precipitation (96 mm total).
ShoulderConditions are warm and beach-friendly. Expect daily rain or showers, often in heavy bursts.
June is one of the wetter and less comfortable months in Koh Samui. If your dates are flexible, consider a different time of year.
How June compares to the rest of the year in Koh Samui
June is one of the warmest months in Koh Samui (3rd of 12) and moderately rainy compared to the rest of the year (7th of 12). Daytime temperature runs 1°C above the annual average (29°C). June runs roughly the same as May (31°C) and stays flat into July.
June sunrise & sunset in Koh Samui
Times shown for Koh Samui local time (Asia/Bangkok), calculated for the 15th of June. They shift by a few minutes day to day across the month.
Photography light in Koh Samui — June
Golden-hour and blue-hour windows for the 15th of June, in Koh Samui's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Koh Samui in June
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on June's tier (Shoulder) and Koh Samui's popularity.
Crowds & pricing — June in Koh Samui
Koh Samui is in a shoulder season month — fewer crowds, slightly lower prices, and a calmer atmosphere than peak weeks. Most major sights stay open with normal hours, though a handful of seasonal restaurants or boat trips may run reduced schedules. Many regulars consider these months the best time to visit because you trade a small amount of weather reliability for a much more pleasant on-the-ground experience.
Sun & mosquito risk — June in Koh Samui
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Sea temperature in Koh Samui — June
Across the year Koh Samui's sea swings from 28.6°C (January) to 32.1°C (May) — June sits at 30.9°C.
Koh Samui in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 28°C / 82°F | 25°C / 76°F | 113 mm | 24 | — |
| February | 28°C / 83°F | 25°C / 77°F | 33 mm | 17 | — |
| March | 30°C / 86°F | 26°C / 78°F | 32 mm | 17 | — |
| April | 31°C / 87°F | 27°C / 80°F | 107 mm | 23 | — |
| May | 31°C / 87°F | 27°C / 80°F | 130 mm | 29 | — |
| June | 30°C / 86°F | 27°C / 80°F | 96 mm | 27 | — |
| July | 30°C / 86°F | 26°C / 79°F | 115 mm | 28 | — |
| August | 30°C / 86°F | 26°C / 79°F | 94 mm | 28 | — |
| September | 29°C / 84°F | 26°C / 78°F | 172 mm | 29 | — |
| October | 28°C / 83°F | 25°C / 77°F | 234 mm | 31 | — |
| November | 28°C / 82°F | 25°C / 77°F | 274 mm | 29 | — |
| December | 28°C / 82°F | 25°C / 76°F | 182 mm | 24 | — |
Other cities with similar June weather
🌍 See the full ranked list of climate twins for Koh Samui in June →
Frequently asked questions
How hot is Koh Samui in June?
In June, Koh Samui averages a high of 30°C (86°F) and a low of 27°C (80°F) — generally hot.
Does it rain a lot in Koh Samui in June?
June is quite rainy in Koh Samui, with about 27 rainy days on average.
Is June a good time to visit Koh Samui?
June is hot but on the rainy side. It suits travelers who are comfortable with hot weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Koh Samui in June?
Pack lightweight, breathable clothing, sunglasses and sunscreen, plus a compact umbrella or rain jacket. See the full June packing list for Koh Samui for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.