Month guide · Koh Samui · Thailand
Koh Samui in July
What July is really like in Koh Samui: weather, crowds, prices, events and what to pack.
Updated By the AMZBooking editorial team
Photo: Gunther Dihlmann, CC BY-SA 3.0
Quick answer
July is one of the best months to visit Koh Samui. Expect average highs of 32°C (90°F), lows of 25°C (77°F), about 12 rainy days and roughly 12.6 hours of daylight. Sunny spells and short showers; busy with European summer holidays.
Key facts
- Average high / low
- 32°C (90°F) / 25°C (77°F)
- Rainy days
- About 12
- Daylight
- About 12.6 hours
- Sea temperature
- 29°C (84°F)
- Crowds
- Busy
- Hotel prices
- High
Weather in July
July is the 4th-warmest month in Koh Samui: days average 32°C (90°F) against a yearly average high of 31°C (88°F), and nights fall to about 25°C (77°F). Rain falls on roughly 12 of its 31 days. Compared with June (32°C (90°F)), July is about as warm; by August highs stay near 32°C (90°F).
- Sunrise (15 July)
- About 06:07
- Sunset (15 July)
- About 18:45
- Daylight
- About 12.6 hours
- Sea
- 29°C (84°F)
Hot, mostly dry season (May–August). Warm seas and short showers; busy in July and August with summer holidays, good value in May and June.
Crowds and prices
On a 1–5 scale, July rates 4 for crowds (the peak is February at 5) and 4 for hotel prices (highest in February). Book accommodation early: July is one of the pricier months.
Events in July
July has no major recurring festival in Koh Samui, which usually means easier bookings.
What to do in July
With frequent rain, plan around indoor sights and keep outdoor time flexible.
Experience · Chaweng
Thai cooking class
Book a morning class with a market visit so you learn about southern Thai ingredients such as fresh turmeric.
- Time needed
- Half a day
- Cost
- Mid-priced
- Food
- Kids
- Rainy day
- Couples
Experience · Chaweng
Muay Thai fight night
Stadiums in Chaweng and Lamai stage regular bouts of Thailand's national sport, with traditional music and pre-fight rituals, from local youngsters to experienced fighters.
- Time needed
- 2–3 hours
- Cost
- Mid-priced
- After dark
- Rainy day
- Active
Religious site · Bang Rak (Big Buddha Beach)
Big Buddha (Wat Phra Yai)
Go at sunrise or late afternoon for softer light; cover shoulders and knees, and wraps are available at the entrance.
- Time needed
- 45 minutes
- Cost
- Free
- Iconic
- Free
- Photo spot
- Views
Beach · Chaweng
Chaweng Beach
Samui's signature beach runs for several kilometres of fine white sand and turquoise water on the east coast.
- Time needed
- Half a day
- Cost
- Free
- Free
- Iconic
- Outdoors
- Kids
- After dark
The sea averages 29°C (84°F) — warm enough to swim. Best beaches near Koh Samui.
What to pack
For highs near 32°C, lows near 25°C and 12 wet days: light, breathable clothes, a sun hat and high-factor sunscreen; a compact umbrella and waterproof shoes — rain is frequent; comfortable walking shoes.
Is July a good time to visit Koh Samui?
One of the best months to visit Koh Samui. The other best months are February–April, June and August. Compare every month.
Koh Samui in other months
Questions travellers ask
+Is July a good time to visit Koh Samui?
It is one of the best months to visit Koh Samui. Sunny spells and short showers; busy with European summer holidays.
+How warm is Koh Samui in July?
Average highs are around 32°C (90°F) and lows around 25°C (77°F).
+Does it rain a lot in Koh Samui in July?
Expect rain on about 12 days of the month, so pack for wet weather.