Swimming on the island of Koh Samui in may 2025 Sea temperature by city in may
Do you want to go to the beach on the island of Koh Samui in may 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 may 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 may 2025
Here, find the average sea temperature on the island of Koh Samui in may in several coastal cities.
86°F
min: 85°F / max: 89°F
Bang Kao (Laem Sor beach)
87°F
min: 85°F / max: 89°F
Bophut
86°F
min: 85°F / max: 89°F
Choeng Mon
86°F
min: 84°F / max: 89°F
Koh Madsum
86°F
min: 85°F / max: 89°F
Koh Phaluai
87°F
min: 85°F / max: 89°F
Koh Taen
87°F
min: 84°F / max: 89°F
Lamai beach
87°F
min: 84°F / max: 89°F
Lipa Noi
87°F
min: 85°F / max: 89°F
Maenam
87°F
min: 84°F / max: 89°F
Nathon
87°F
min: 85°F / max: 89°F
Where should you go swimming on the island of Koh Samui in the month of may?
Swimming on the island of Koh Samui in may is ideal
In may on the island of Koh Samui swimming conditions are generally the same everywhere.
In may 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 89°F and an average of 86°F, going in the water (and staying there!) feels great.
Where to go swimming on the island of Koh Samui in may: the map of sea temperatures
ideal swimming 
pleasant swimming 
cool swimming 
cold swimming 
freezing swimmingWater temperature and seasonal norms in may
Chaweng Beach
| May | |||
| Average sea temperature | 86°F | ||
| Minimum sea temperature | 85°F | ||
| Maximum sea temperature | 89°F | ||
| Average outside temperature | 86°F | ||
| Maximum outside temperature | 88°F | ||
| Minimum outside temperature | 85°F | ||
| Precipitation | 6.3in | ||
| Number of days of precipitation | 11 jour(s) (34%) | ||
| Cloud cover | 31% | ||
| Our opinion | ideal swimming |
More information on swimming in Chaweng Beach in may
Bang Kao (Laem Sor beach)
| May | |||
| Average sea temperature | 87°F | ||
| Minimum sea temperature | 85°F | ||
| Maximum sea temperature | 89°F | ||
| Average outside temperature | 86°F | ||
| Maximum outside temperature | 88°F | ||
| Minimum outside temperature | 85°F | ||
| Precipitation | 6.3in | ||
| Number of days of precipitation | 11 jour(s) (34%) | ||
| Cloud cover | 31% | ||
| Our opinion | ideal swimming |
Bophut
| May | |||
| Average sea temperature | 86°F | ||
| Minimum sea temperature | 85°F | ||
| Maximum sea temperature | 89°F | ||
| Average outside temperature | 86°F | ||
| Maximum outside temperature | 88°F | ||
| Minimum outside temperature | 85°F | ||
| Precipitation | 6.3in | ||
| Number of days of precipitation | 11 jour(s) (34%) | ||
| Cloud cover | 31% | ||
| Our opinion | ideal swimming |
Choeng Mon
| May | |||
| Average sea temperature | 86°F | ||
| Minimum sea temperature | 84°F | ||
| Maximum sea temperature | 89°F | ||
| Average outside temperature | 86°F | ||
| Maximum outside temperature | 88°F | ||
| Minimum outside temperature | 85°F | ||
| Precipitation | 6.3in | ||
| Number of days of precipitation | 11 jour(s) (34%) | ||
| Cloud cover | 31% | ||
| Our opinion | ideal swimming |
Koh Madsum
| May | |||
| Average sea temperature | 86°F | ||
| Minimum sea temperature | 85°F | ||
| Maximum sea temperature | 89°F | ||
| Average outside temperature | 86°F | ||
| Maximum outside temperature | 88°F | ||
| Minimum outside temperature | 85°F | ||
| Precipitation | 6.3in | ||
| Number of days of precipitation | 11 jour(s) (34%) | ||
| Cloud cover | 31% | ||
| Our opinion | ideal swimming |
List of coastal cities on the island of Koh Samui
| Chaweng Beach in may | ideal swimming |
| Bang Kao (Laem Sor beach) in may | ideal swimming |
| Bophut in may | ideal swimming |
| Choeng Mon in may | ideal swimming |
| Koh Madsum in may | ideal swimming |
| Koh Phaluai in may | ideal swimming |
| Koh Taen in may | ideal swimming |
| Lamai beach in may | ideal swimming |
| Lipa Noi in may | ideal swimming |
| Maenam in may | ideal swimming |
| Nathon in may | ideal swimming |