November weather forecast
Surabaya, Indonesia

In November, Surabaya's weather transitions into the wet season, and the rainfall triples from October. The humidity rises perceptibly, and the temperature sees a slight drop, injecting a new flavor into the city's atmosphere. Despite the rising sea temperatures, the increased rainfall and less sunlight may discourage beach activities. Visitors will notice the intensifying wind speeds towards the month's end, signalling the onset of December's winds. It is wise to brace for frequent and potentially heavy downpours as the rainy season takes root.

Temperature

The advent of November brings an average high-temperature of a still hot 32.4°C (90.3°F), exhibiting minor difference from the previous month. Surabaya's average low-temperature during November nights is observed to be a moderately hot 26.5°C (79.7°F).

Heat index

The heat index for November is evaluated at a scorching 40°C (104°F). Use additional protective measures, heat cramps and heat exhaustion are possible outcomes. Continuous activity might lead to heatstroke.
It is worth noting that heat index values are gauged for conditions in the shade and light breezes. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'feels like' or 'felt air temperature', blends air temperature and moisture content to represent the felt temperature to humans. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. Direct sunlight exposure should be noted as it has the potential to increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Children often overlook the necessity for resting and fluid replenishment. Thirst is a late sign of dehydration - thus, it is critical to stay hydrated, especially during extended periods of physical activities.
In high temperatures, perspiration kicks in, allowing the human body to cool down through the evaporation of sweat. An increase in relative humidity disrupts body cooling by slowing the evaporation rate, thereby reducing the rate at which the body cools and amplifying the sense of heat. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

The average relative humidity in November in Surabaya is 67%.

Rainfall

In Surabaya, in November, it is raining for 18.1 days, with typically 47mm (1.85") of accumulated precipitation. In Surabaya, during the entire year, the rain falls for 187.8 days and collects up to 839mm (33.03") of precipitation.

Sea temperature

In Surabaya, in November, the average water temperature is 30.1°C (86.2°F).
Note: The cool, rejuvenating sensation of water can be lacking when temperatures are beyond 30°C (86°F).

Daylight

In November, the average length of the day in Surabaya is 12h and 27min.
On the first day of the month, sunrise is at 05:01 and sunset at 17:23. On the last day of November, in Surabaya, sunrise is at 05:02 and sunset at 17:33 WIB.

Sunshine

In November, the average sunshine is 9.6h.

UV index

The months with the highest UV index in Surabaya are January through December, with an average maximum UV index of 7. The months with the lowest UV index in Surabaya are January through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.
Note: The maximum daily UV index, 7 in November, converts into the following recommendations:
Use protective steps and abide by sun safety guidelines. Safeguarding against skin and eye harm is necessary. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Caution! The reflection of sand and water significantly amplifies the Sun's UV radiation.