August · Thailand
Best time to visit Koh Lanta in August Weather, crowds & prices
Weather in Koh Lanta in August
Average temperature 27°C, 353 mm of rain, about 20 days with 6+ hours of sunshine and 88% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
August score
6.1/10
Ranked #7 of 12 months
- Avg temp
- 27°C
- Rainfall
- 353 mm
- Humidity
- 88%
- Days with 6h+ sun
- 20
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
August in Koh Lanta scores 6.1/10 for beach and coastal travel - ranked #7 of 12. Expect around 27°C, 353 mm of rain, and roughly 20 days with 6+ hours of sunshine this month.
Koh Lanta's quiet beaches and long sunsets suit families and travellers avoiding the crowds.
August in Koh Lanta — middling scores, decent value
Days in August average 27°C (81°F) and humidity near 88% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
This is the year's wettest stretch at 353 mm, but with about 20 days with 6+ hours of sunshine it is not a total loss; an indoor fallback covers the risk.
That is 6.1/10 on the same scale — 7th of 12 months, versus 8.7/10 for the best month here.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.
Expect mid-season pricing, and crowds are moderate.
If your dates are flexible, February is materially better in Koh Lanta — 2.6 points higher on the same scale.
Frequently asked
- What is the weather like in Koh Lanta in August?
- In August, Koh Lanta averages 27°C, 353 mm of rain, and about 20 days with 6+ hours of sunshine. Its climate-comfort score is 6.1/10.
- Is August a good time to visit Koh Lanta?
- August earns a 6.1/10 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 Lanta in August?
- Expect about 353 mm of rain in August. Average humidity is 88% and there are about 20 days with 6+ hours of sunshine.
Curated in Koh Lanta
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Things to do in Koh Lanta
Koh Lanta, Thailand. Live activities and tours from GetYourGuide, matched to this destination.