Best time to visit Koh Samui (Gulf of Thailand)
Our pick for sun: January to March.
The best months
- SunJanuary to March
- BeachJanuary to March
…
The twelve months at a glance
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sun | Ideal, 80/100 | Ideal, 93/100 | Ideal, 85/100 | Good, 75/100 | Good, 60/100, Heavy rain | Good, 60/100, Heavy rain | Good, 60/100, Heavy rain | Good, 60/100, Heavy rain | Good, 60/100, Heavy rain | Fair, 40/100, Heavy rain, Monsoon | Fair, 40/100, Heavy rain, Monsoon | Fair, 53/100, Monsoon |
| Beach | Ideal, 83/100 | Ideal, 94/100 | Ideal, 88/100 | Good, 79/100 | Good, 63/100, Heavy rain | Good, 65/100, Heavy rain | Good, 65/100, Heavy rain | Good, 65/100, Heavy rain | Good, 65/100, Heavy rain | Fair, 45/100, Heavy rain, Monsoon | Fair, 45/100, Heavy rain, Monsoon | Fair, 57/100, Monsoon |
- Ideal
- Good
- Fair
- Best avoided
- Risk flagged
Temperatures and rain
See the month-by-month values
| Month | High | Low | Sea | Rain |
|---|---|---|---|---|
| January | 27°C | 26°C | 28°C | 83 mm |
| February | 27°C | 26°C | 28°C | 41 mm |
| March | 28°C | 27°C | 29°C | 95 mm |
| April | 29°C | 28°C | 30°C | 103 mm |
| May | 29°C | 27°C | 30°C | 125 mm |
| June | 29°C | 27°C | 30°C | 97 mm |
| July | 29°C | 27°C | 30°C | 93 mm |
| August | 29°C | 27°C | 29°C | 100 mm |
| September | 28°C | 27°C | 29°C | 149 mm |
| October | 28°C | 26°C | 29°C | 295 mm |
| November | 28°C | 26°C | 29°C | 298 mm |
| December | 27°C | 26°C | 28°C | 154 mm |
Estimated flight time
- From YUL : about 17 h
- From YYZ : about 17 h 15 min
- From YVR : about 15 h 05 min
Estimate of a nonstop flight computed from the distance: not a schedule. Connections lengthen the trip.
Getting to Koh Samui (Gulf of Thailand) with points
Keep going
Where this data comes from
Temperatures, sunshine and rain: monthly normals we computed over 1991-2020. These are estimates from a climate reanalysis, not station readings.
- ERA5 reanalysis-era5-single-levels-timeseries (C3S, CC-BY)
- NOAA OISST v2.1
Contains modified Copernicus Climate Change Service information (ERA5, 2026, CC BY 4.0 licence). Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains. Sea temperature: NOAA OISST v2.1 (Huang et al., 2021, J. Climate 34, doi:10.1175/JCLI-D-20-0166.1).