Swimming on the island of Koh Samui in august 2025 Sea temperature by city in august
Do you want to go to the beach on the island of Koh Samui in august 2025? Is it the right month to go for pleasant temperatures and staying in the water for a long time? The answer is on this page with the sea temperatures in august on the island of Koh Samui by city and our opinion on the chances of enjoying pleasant sea conditions.
Sea temperature on the island of Koh Samui in august 2025
Here, find the average sea temperature on the island of Koh Samui in august in several coastal cities.
85°F
min: 83°F / max: 86°F
Bang Kao (Laem Sor beach)
85°F
min: 83°F / max: 86°F
Bophut
85°F
min: 83°F / max: 86°F
Choeng Mon
85°F
min: 83°F / max: 87°F
Koh Madsum
85°F
min: 83°F / max: 87°F
Koh Phaluai
85°F
min: 84°F / max: 87°F
Koh Taen
85°F
min: 83°F / max: 86°F
Lamai beach
85°F
min: 83°F / max: 87°F
Lipa Noi
85°F
min: 83°F / max: 87°F
Maenam
85°F
min: 83°F / max: 87°F
Nathon
85°F
min: 83°F / max: 87°F
Where should you go swimming on the island of Koh Samui in the month of august?
Swimming on the island of Koh Samui in august is ideal
In august on the island of Koh Samui swimming conditions are generally the same everywhere.
In august in Chaweng Beach, Bang Kao (Laem Sor beach), Bophut, Choeng Mon, Koh Madsum, Koh Phaluai, Koh Taen, Lamai beach, Lipa Noi, Maenam and Nathon, swimming conditions are perfect! With water reaching a maximum of 86°F and an average of 85°F, going in the water (and staying there!) feels great.
Where to go swimming on the island of Koh Samui in august: the map of sea temperatures
ideal swimming 
pleasant swimming 
cool swimming 
cold swimming 
freezing swimmingWater temperature and seasonal norms in august
Chaweng Beach
| August | |||
| Average sea temperature | 85°F | ||
| Minimum sea temperature | 83°F | ||
| Maximum sea temperature | 86°F | ||
| Average outside temperature | 85°F | ||
| Maximum outside temperature | 86°F | ||
| Minimum outside temperature | 83°F | ||
| Precipitation | 5.9in | ||
| Number of days of precipitation | 9 jour(s) (30%) | ||
| Cloud cover | 39% | ||
| Our opinion | ideal swimming |
More information on swimming in Chaweng Beach in august
Bang Kao (Laem Sor beach)
| August | |||
| Average sea temperature | 85°F | ||
| Minimum sea temperature | 83°F | ||
| Maximum sea temperature | 86°F | ||
| Average outside temperature | 85°F | ||
| Maximum outside temperature | 86°F | ||
| Minimum outside temperature | 83°F | ||
| Precipitation | 5.9in | ||
| Number of days of precipitation | 9 jour(s) (30%) | ||
| Cloud cover | 39% | ||
| Our opinion | ideal swimming |
Bophut
| August | |||
| Average sea temperature | 85°F | ||
| Minimum sea temperature | 83°F | ||
| Maximum sea temperature | 86°F | ||
| Average outside temperature | 85°F | ||
| Maximum outside temperature | 86°F | ||
| Minimum outside temperature | 83°F | ||
| Precipitation | 5.9in | ||
| Number of days of precipitation | 9 jour(s) (30%) | ||
| Cloud cover | 39% | ||
| Our opinion | ideal swimming |
Choeng Mon
| August | |||
| Average sea temperature | 85°F | ||
| Minimum sea temperature | 83°F | ||
| Maximum sea temperature | 87°F | ||
| Average outside temperature | 85°F | ||
| Maximum outside temperature | 86°F | ||
| Minimum outside temperature | 83°F | ||
| Precipitation | 5.9in | ||
| Number of days of precipitation | 9 jour(s) (30%) | ||
| Cloud cover | 39% | ||
| Our opinion | ideal swimming |
Koh Madsum
| August | |||
| Average sea temperature | 85°F | ||
| Minimum sea temperature | 83°F | ||
| Maximum sea temperature | 87°F | ||
| Average outside temperature | 85°F | ||
| Maximum outside temperature | 86°F | ||
| Minimum outside temperature | 83°F | ||
| Precipitation | 5.9in | ||
| Number of days of precipitation | 9 jour(s) (30%) | ||
| Cloud cover | 39% | ||
| Our opinion | ideal swimming |
List of coastal cities on the island of Koh Samui
| Chaweng Beach in august | ideal swimming |
| Bang Kao (Laem Sor beach) in august | ideal swimming |
| Bophut in august | ideal swimming |
| Choeng Mon in august | ideal swimming |
| Koh Madsum in august | ideal swimming |
| Koh Phaluai in august | ideal swimming |
| Koh Taen in august | ideal swimming |
| Lamai beach in august | ideal swimming |
| Lipa Noi in august | ideal swimming |
| Maenam in august | ideal swimming |
| Nathon in august | ideal swimming |