August weather forecast
Surabaya, Indonesia

August in Surabaya introduces marginally cooler conditions and the least rainfall, offering ideal weather for urban exploration. Consistent with the ongoing dry season, the weather witnesses fewer rainy days. As August hosts the least cloudy days and maximum sunshine duration, clear days are the norm rather than the exception. A slight increase in the sea temperature indicates an enhanced appeal for aquatic activities. Varied wind speeds dominate the month, scrambling the weather pattern to deliver unique and memorable moments.

Temperature

With August's arrival, Surabaya's weather records an average high-temperature of a still tropical 30.8°C, marking little difference from July's 30.1°C. Throughout the nights in August, Surabaya experiences an average low-temperature of 24.2°C.

Heat index

August's heat index is estimated at a very hot 36°C. Take more safety measures, heat exhaustion and heat cramps are potential outcomes. Persistent activity might lead to heatstroke.
Given the heat index, its values are aligned with shaded sites and gentle winds. The heat index may experience an enhancement of 15 Fahrenheit (8 Celsius) degrees under direct sunlight.
Note: The heat index, also known as 'feels like' or 'apparent temperature', comes about by integrating the temperature readings with the humidity levels. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Children typically face more danger than adults as their sweat production is usually lower. Additionally, the bigger skin surface compared to their small size and the increased heat due to their activeness exacerbate the risk.
The process of perspiration is vital for the human body to get rid of excess warmth by allowing sweat to evaporate. Under high air temperature and high humidity (high heat index) conditions, the body's ability to perspire is compromised, increasing the sensation of heat. Accumulating heat beyond the body's cooling measures leads to rising temperatures and potential ailments.

Humidity

In August, the average relative humidity is 68%.

Rainfall

The month with the least rainfall in Surabaya is August, when the rain falls for 3.7 days and typically collects 4mm of precipitation.

Sea temperature

With an average sea temperature of 27.8°C, August is the month with the coldest seawater.
Note: Water temperature ranging between 25°C and 29°C is considered very warm and pleasing for everyone. It allows for enjoyable water activities over extended periods without discomfort.

Daylight

In Surabaya, Indonesia, the average length of the day in August is 11h and 53min.
On the first day of August in Surabaya, sunrise is at 05:41 and sunset at 17:29. On the last day of the month, sunrise is at 05:30 and sunset at 17:28 WIB.

Sunshine

August through October, with an average of 9.9h of sunshine, are months with the most sunshine in Surabaya.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index. January through December, with an average maximum UV index of 7, are months with the lowest UV index in Surabaya. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: The maximum UV index of 7 during August leads to these instructions:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Experience reduced UV exposure by about half when donning a wide-brim hat. Be attentive! The UV exposure is heightened with reflections from sand and water.