Ko Samui
May
Weather in Ko Samui for May 2027
Your guide to Ko Samui weather in May - trends and predictions
In general, the average temperature in Ko Samui at the beginning of May is 30 °C. As the month progressed, temperatures tended to slightly increase, reaching an average of 30.1 °C by the end of May.
Ko Samui experiences heavy rainfall in May, with over 20 rainy days and an average total precipitation 184.4 mm.
Is May a good time to visit Ko Samui? check out the best time to travel to Ko Samui page.
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Temperatures
Rain 🌧️
More
0
Dry days
31
Rainy days
0
Snow days
30°/27°
Temperatures
20 km/h
Avg max wind
72 %
Avg humidity
Ko Samui Weather May
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Temperatures trend during May in Ko Samui
See the weather trend as well as the moving average line
May weather in Ko Samui day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 May |  Patchy rain possible | 30° /27° | 2.3 mm | 8 | |
| 2 May |  Moderate or heavy rain shower | 30° /27° | 6 mm | 8 | |
| 3 May | Patchy rain possible | 30° /27° | 6.7 mm | 7 | |
| 4 May | Moderate or heavy rain shower | 30° /27° | 6.5 mm | 7 | |
| 5 May | Moderate or heavy rain shower | 30° /27° | 9.3 mm | 7 | |
| 6 May | Moderate or heavy rain shower | 30° /26° | 12.5 mm | 7 | |
| 7 May | Moderate or heavy rain shower | 30° /26° | 8.4 mm | 7 | |
| 8 May | Patchy rain possible | 30° /27° | 5.3 mm | 8 | |
| 9 May | Patchy rain possible | 30° /27° | 5.8 mm | 7 | |
| 10 May |  Heavy rain at times | 30° /27° | 6.5 mm | 7 | |
| 11 May | Patchy rain possible | 30° /27° | 4.6 mm | 7 | |
| 12 May | Moderate or heavy rain shower | 30° /27° | 9.6 mm | 7 | |
| 13 May |  Cloudy | 30° /27° | 2.3 mm | 7 | |
| 14 May | Patchy rain possible | 30° /28° | 4.2 mm | 7 | |
| 15 May | Patchy rain possible | 31° /27° | 3.6 mm | 8 | |
| 16 May | Moderate or heavy rain shower | 30° /27° | 6.1 mm | 7 | |
| 17 May | Patchy rain possible | 30° /27° | 7.3 mm | 7 | |
| 18 May | Moderate or heavy rain shower | 30° /27° | 6.5 mm | 6 | |
| 19 May | Moderate or heavy rain shower | 30° /27° | 5.5 mm | 7 | |
| 20 May | Patchy rain possible | 31° /28° | 1.8 mm | 7 | |
| 21 May | Moderate or heavy rain shower | 30° /27° | 3.4 mm | 7 | |
| 22 May | Moderate or heavy rain shower | 30° /27° | 9.8 mm | 7 | |
| 23 May | Cloudy | 30° /27° | 2 mm | 7 | |
| 24 May | Patchy rain possible | 31° /27° | 2.4 mm | 7 | |
| 25 May | Moderate or heavy rain shower | 31° /27° | 5.4 mm | 8 | |
| 26 May | Moderate rain at times | 30° /27° | 3.3 mm | 8 | |
| 27 May | Moderate rain at times | 30° /27° | 2.7 mm | 7 | |
| 28 May | Moderate rain at times | 30° /26° | 8.6 mm | 7 | |
| 29 May | Moderate or heavy rain shower | 30° /27° | 9.2 mm | 7 | |
| 30 May | Moderate or heavy rain shower | 30° /27° | 6.7 mm | 7 | |
| 31 May | Patchy rain possible | 30° /26° | 9.9 mm | 6 | |
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Important Notice
Our weather forecast for Ko Samui in May is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Ko Samui forecast closer to your planned date for the most up-to-date weather information.
Change Month
Ko Samui weather in May vs April vs June
Compare May weather in Ko Samui with the previous and following months. See how temperature, rainfall, wind, and other conditions change throughout the year to help you plan your visit.
| April | May | June | |
|---|---|---|---|
| Weather | Patchy rain possible | Patchy rain possible | Patchy rain possible |
| Temperatures | 29°/27° | 30°/27° | 29°/27° |
| Rainfall | 101 mm | 184 mm | 126 mm |
| Wind | 18.6 km/h | 20.4 km/h | 23.7 km/h |
| Humidity | 72% | 72% | 72% |
| Rainy days | 28 days | 31 days | 29 days |
| Dry days | 2 days | 0 days | 1 days |
Planning a trip to Ko Samui? Discover the best time to visit
Ko Samui in May - FAQ
What are the expected maximum and minimum temperatures in Ko Samui during May?
During May, expect a variety of temperatures with highs around 30° and lows near 27°, suitable for diverse activities and preferences.
How much rainfall should be expected in Ko Samui during May?
Significant rainfall exceeding 184.4 mm is expected in Ko Samui during May, occurring over more than 31 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Ko Samui during May?
The average wind speed in Ko Samui during May is 20 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in Ko Samui
Explore the daily rainfall trends and prepare for Ko Samuis May weather 💧
Typically, Ko Samui has 31 rainy days in May with a total of 184.4 mm of rainfall.
UV exposure in Ko Samui during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
What to pack to Ko Samui in May?
Warm & sunny · highs around 30 °C, frequent showers
As you prepare for your trip to Ko Samui in May, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Ko Samui, during May, is comfortable and enjoyable, regardless of the weather conditions.
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