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 the onset of August, the average high-temperature registers at a still tropical 30.8°C (87.4°F), subtly different from July's 30.1°C (86.2°F). August in Surabaya generally records an average low-temperature of 24.2°C (75.6°F).

Heat index

The average heat index in August is evaluated at a fiery hot 36°C (96.8°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
The metrics for the heat index are tailored for both shady environments and light winds. Exposure to the direct sun might augment heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is a single figure representing how weather conditions feel when combining temperature and humidity. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. 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 especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it's vital to remain hydrated, particularly during prolonged physical activities.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. In the presence of high relative humidity, the evaporation rate diminishes, resulting in the body retaining more warmth compared to dry conditions. When body temperature rises due to excess heat gain beyond its removal capability, one might experience heat-related disorders.

Humidity

The average relative humidity in August is 68%.

Rainfall

August is the month with the least rainfall. Rain falls for 3.7 days and accumulates 4mm (0.16") of precipitation.

Sea temperature

The month with the coldest seawater in Surabaya is August, with an average sea temperature of 27.8°C (82°F).
Note: Engaging in swimming, diving, or other water activities is highly enjoyable in temperatures ranging from 25°C (77°F) to 29°C (84.2°F), without any unpleasant sensations for prolonged durations.

Daylight

The average length of the day in August is 11h and 53min.
On the first day of August, 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.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index in Surabaya. January through December, with an average maximum UV index of 7, are months with the lowest UV index in Surabaya. A UV Index of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: In August, the average maximum UV index of 7 translates into the following recommendations:
Resist overexposure. Safeguarding from solar damage is indispensable. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Caution! The Sun's UV rays become stronger due to reflections from water and sand.