Month guide · Koh Samui · Thailand
Koh Samui in August
What August is really like in Koh Samui: weather, crowds, prices, events and what to pack.
Updated By the AMZBooking editorial team
Photo: Abrget47j, CC BY-SA 3.0
Quick answer
August 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 12.4 hours of daylight. One of the busiest months, with generally good weather and calm seas on the north and east coasts.
Key facts
- Average high / low
- 32°C (90°F) / 25°C (77°F)
- Rainy days
- About 12
- Daylight
- About 12.4 hours
- Sea temperature
- 29°C (84°F)
- Crowds
- Very busy
- Hotel prices
- Highest
Weather in August
August is the 5th-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 July (32°C (90°F)), August is about as warm; by September highs stay near 32°C (90°F).
- Sunrise (15 August)
- About 06:12
- Sunset (15 August)
- About 18:38
- Daylight
- About 12.4 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, August rates 5 for crowds (the peak is February at 5) and 5 for hotel prices (highest in February). Book accommodation early: August is one of the pricier months.
Events in August
August has no major recurring festival in Koh Samui, which usually means easier bookings.
What to do in August
With frequent rain, plan around indoor sights and keep outdoor time flexible.
Street · Bophut and Fisherman's Village
Fisherman's Village, Bophut
Bophut's beachfront lane of old wooden Chinese-Thai shophouses has become Samui's most attractive dining and shopping street.
- Time needed
- 2–3 hours
- Cost
- Free
- Free
- Food
- Shopping
- After dark
- Couples
Nature · Lamai
Hin Ta and Hin Yai
Go in the early morning before tour buses, and wear shoes with grip for the slippery rocks.
- Time needed
- 30 minutes
- Cost
- Free
- Free
- Photo spot
- Nature
Nature · Lipa Noi and the west coast
Na Muang Waterfalls
Two waterfalls in the island's interior: Na Muang 1, about 18 metres high with a swimming pool at its base and a short walk from the road, and the taller Na Muang 2, reached by a steeper trail through the forest.
- Time needed
- 1.5–2 hours
- Cost
- Free
- Free
- Nature
- Outdoors
- Kids
- Active
Garden · Hills
Secret Buddha Garden
Go with a 4x4 tour or an experienced driver; the access road is too steep for most scooters.
- Time needed
- 1 hour
- Cost
- Low cost
- Art
- Nature
- Off the beaten path
- Views
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 August a good time to visit Koh Samui?
One of the best months to visit Koh Samui. The other best months are February–April and June–July. Compare every month.
Koh Samui in other months
Questions travellers ask
+Is August a good time to visit Koh Samui?
It is one of the best months to visit Koh Samui. One of the busiest months, with generally good weather and calm seas on the north and east coasts.
+How warm is Koh Samui in August?
Average highs are around 32°C (90°F) and lows around 25°C (77°F).
+Does it rain a lot in Koh Samui in August?
Expect rain on about 12 days of the month, so pack for wet weather.