March weather forecast
Ko Samui, Thailand

In Ko Samui, Thailand, the arrival of March brings a significant shift in the weather. Although similar to February, more rainfall can be observed with an accumulation of 81mm (3.19") over the month. Although there's an increase in rainfall, the quantity of sunny days remains fairly constant. March also signals the end of the dry season, leading to a distinct change in climate conditions for the coming month. The beaches continue to be lively with the warmth of the sun being a constant.

Temperature

March's arrival brings an average high-temperature of a tropical 30.6°C (87.1°F), slightly deviating from February's 29.4°C (84.9°F). Ko Samui logs an average low-temperature of 25.6°C (78.1°F) during the nights of March, subtly lower than its daytime highs.

Heat index

The heat index value for March is computed to be a blistering 40°C (104°F). Extra safeguards are necessary to prevent heat exhaustion and heat cramps. Prolonged activity might cause heatstroke.
It is essential to grasp that the heat index's numbers are for shade and light wind settings. Under direct sunshine, the heat index values might be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', unifies temperature and humidity readings to offer a comprehensive feel of warmth. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Young ones regularly neglect the requirement for rest and fluid replenishment. Thirst is a late stage of dehydration - so, it is necessary to keep hydrated, particularly during extended periods of physical exertion.
To offset high temperatures, the human body releases sweat which, upon evaporation, cools it down. An increase in relative humidity hinders the body's normal cooling function by reducing evaporation, thereby decreasing the rate of body cooling and enhancing the sense of warmth. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.

Humidity

The average relative humidity in March is 82%.

Rainfall

In March, in Ko Samui, the rain falls for 4 days. Throughout March, 81mm (3.19") of precipitation is accumulated. Throughout the year, in Ko Samui, there are 160 rainfall days, and 1960mm (77.17") of precipitation is accumulated.

Sea temperature

In Ko Samui, the average seawater temperature in March is 28.8°C (83.8°F).
Note: Water temperatures in the range of 25°C (77°F) to 29°C (84.2°F) are warm and delightful, ensuring comfort during water activities over extended periods.

Daylight

In Ko Samui, the average length of the day in March is 12h and 5min.
On the first day of the month, sunrise is at 06:33 and sunset at 18:30. On the last day of March, sunrise is at 06:17 and sunset at 18:30 +07.

Sunshine

The average sunshine in March in Ko Samui is 8h.

UV index

February through October, with an average maximum UV index of 12, are months with the highest UV index. A UV Index estimate of 11, and higher, represents an extreme threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: The UV index of 12 during March leads to these advisories:
Implement all necessary safeguards, unprotected skin might suffer burns rapidly. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Ensure the liberal application and reapplication of a broad-spectrum SPF 30+ sunscreen after each outdoor activity or swim, and every two hours. Be cautious! Sand and water surfaces make the Sun's UV rays more potent.