Last updated: August 21, 2025
In August, Surabaya, Indonesia experiences a warm tropical climate characterized by an average temperature of 23°C (73°F), with daily highs reaching up to 31°C (88°F) and lows dipping to a comfortable 16°C (60°F). This month brings a slight touch of humidity, sitting at 76%, which adds to the tropical feel. Rainfall is minimal, with 26 mm (1.0 in) spread over approximately 6 days, making it a relatively dry period perfect for outdoor activities. Whether you're exploring the vibrant city or enjoying its rich culture, August offers a pleasant atmosphere for all.
In August, Surabaya, Indonesia, experiences a delightful balance of warmth and mildness, with temperatures ranging from 16°C (60°F) at night to a peak of 31°C (88°F) during the day. The average temperature settles at 23°C (73°F), akin to the pleasant conditions seen in the preceding months. As the city transitions from the cooler July, when nighttime temperatures dip to 15°C (59°F), August maintains a steady warmth while hinting at the hotter months ahead. This month marks the beginning of a gradual rise in maximum temperatures, which will reach their zenith in October and November, demonstrating a typical tropical pattern of warm weather as the dry season progresses.
In August 2023, Surabaya experienced a remarkable decline in precipitation, recording only 26 mm (1.0 in) of rainfall over 6 days. This continues a trend of diminishing rainfall typical of the dry season, as July also saw minimal precipitation at just 28 mm across 5 days. In stark contrast, the preceding months from January to March witnessed significantly higher precipitation levels, with January alone receiving 461 mm over 25 days. As the region transitions into September, there is a tentative increase expected, with precipitation predicted to rise to 49 mm. This cyclical pattern underscores Surabaya's climate, where the dry months sharply contrast with the wetter periods, illustrating the city’s dynamic weather system.
In Surabaya, Indonesia, August marks a noticeable shift in humidity, dropping to 76% from the higher levels experienced earlier in the year. This decline continues the trend observed from July, where humidity was at 79%—the lowest point prior to August. The months leading up to August, particularly February with 87% humidity, showcase a rising pattern, peaking in the wet season before giving way to slightly drier conditions. As the year unfolds, humidity levels consistently decrease, reaching their annual low in September at 72%, suggesting a transition towards the drier months ahead. This ebb and flow of moisture in the air characterizes the tropical climate of Surabaya, making each month a unique experience for residents and visitors alike.
In August, Surabaya experiences a UV Index of 13, placing it firmly within the extreme exposure category, indicating that even short periods in the sun can lead to skin damage. This month shows a slight increase from the previous months of June and July, both of which had a lower UV Index of 11. The trend remains consistent throughout the year, as Surabaya's UV levels are notably high, with values often soaring above 10, signaling the need for vigilance against sunburn — with a burn time averaging just 10 minutes. For those planning outdoor activities, it's essential to take precautions to protect your skin. To learn more about the UV Index specifics in Surabaya, check out Surabaya UV Index.
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August in Surabaya, Indonesia, shines particularly bright, boasting an impressive 322 hours of sunshine. This peak comes at the tail end of a remarkable stretch from May through July, where residents basked in extended daylight, with July alone recording 319 hours. As summer gives way to the onset of September, sunshine remains generous at 310 hours, maintaining a delightful warmth for outdoor activities. Overall, the city's sunshine hours trend reveals a pattern of increasing brightness and warmth during mid-year, creating the perfect backdrop for both locals and tourists to soak up the vibrant tropical energy of Surabaya.
In Surabaya, Indonesia, the likelihood of sunny weather reaches a commendable 32% in August, positioning it as one of the more favorable months for sunshine. This period follows a robust July, which boasts the highest percentage of sunny days at 39%. The upward trend into August suggests that while there may be a slight decrease, the chances remain significantly higher than the earlier months of the year, where sunshine is scarce—hovering around 1% in January and gradually climbing to 31% by April. Thus, for those seeking warmth and sunlight in August, Surabaya presents a promising environment to bask in the sun before transitioning into the wetter months.
In Surabaya, Indonesia, the August daylight duration holds steady at 11 hours, consistent with the preceding months of June and July. This shift marks a gradual transition from the longer days of early in the year, where daylight spans a full 12 hours from January through March. As the year progresses into the latter months, September welcomes back the longer days, returning to 12 hours of daylight, creating a rhythmic pattern that reflects the region’s tropical climate. This predictable cycle offers both residents and visitors alike a reliable experience of Surabaya’s daylight, melding seamlessly with the vibrant culture and lively atmosphere of the city.
In August, Surabaya experiences a notable uptick in wind speed, reaching an average of 1.6 m/s (4 mph), marking it as one of the windiest months of the year. This increase aligns with the trend observed in the latter half of the year, where wind speeds rise slightly from the calmer days of early months like January and March, which hover around 1.0 m/s (2 mph). The consistency of 1.6 m/s is maintained into September, suggesting that the city's coastal breezes gain strength as the year progresses. Following this peak, October sees a minor dip to 1.3 m/s (3 mph), before the winds settle into more tranquil conditions in the final months. Overall, August's winds serve as a gentle reminder of the shifting patterns of nature in this vibrant Indonesian city.
Weather in Surabaya varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Surabaya, focusing on differences in temperature, rainfall, humidity, and UV levels.
August and January in Surabaya exhibit notable differences in weather patterns. While August enjoys a warm average temperature of 23°C (73°F) with a maximum of 31°C (88°F), it experiences relatively low rainfall at 26 mm (1.0 in) over just 6 days. In contrast, January remains similarly warm with an average temperature of 23°C (74°F) and a maximum of 30°C (86°F), but it is much wetter, with a substantial 461 mm (18.2 in) of precipitation occurring over 25 days. Additionally, January's humidity averages 84% compared to August's 76%. For more detailed insights on January weather, you can visit Surabaya weather in January.
August and February present contrasting weather patterns. In August, temperatures range from a minimum of 16°C (60°F) to a maximum of 31°C (88°F), with an average of 23°C (73°F). The month is relatively dry, experiencing only 26 mm (1.0 in) of precipitation over about 6 days and a humidity level of 76%. In contrast, February sees slightly higher temperatures, with a minimum of 19°C (67°F) and a maximum of 30°C (86°F), maintaining a similar average of 23°C (74°F). However, the month is significantly wetter, accumulating 485 mm (19.1 in) of rain over the course of 28 days and a higher humidity level of 87%. For more details, you can visit Surabaya weather in February.
In comparing the weather between August and March, August tends to be warmer and dryer. With minimum temperatures around 16°C (60°F) and maximums reaching 31°C (88°F), August sees an average temperature of 23°C (73°F) and only 26 mm of precipitation over about 6 days. In contrast, March experiences slightly higher minimum temperatures of 19°C (66°F) and similarly high maximums of 30°C (86°F) with an average of 23°C (74°F); however, it is significantly wetter, with 502 mm (19.8 in) of rain over the entire month, impacting nearly every day with precipitation. The humidity in March also rises to 85%, compared to August’s 76%. For a more detailed look at the weather patterns, you can check Surabaya weather in March.
In comparing the weather of April and August, we see distinct contrasts, particularly in precipitation and humidity. April experiences slightly warmer temperatures, with average highs reaching 30°C (87°F) compared to August's max of 31°C (88°F). However, April is significantly wetter, receiving 332 mm (13.1 in) of rain over 27 days, whereas August sees only 26 mm (1.0 in) over just 6 days. Additionally, humidity levels are higher in April at 82%, compared to August's 76%. For a more detailed look at April's weather, visit Surabaya weather in April.
When comparing the weather in August and May, August typically offers slightly lower minimum and average temperatures, with a range from 16°C to 31°C, while May features temperatures ranging from 18°C to 30°C. May is significantly wetter, experiencing 163 mm of precipitation over 18 days compared to August’s 26 mm over just 6 days. Additionally, humidity levels are fairly high in both months, with August at 76% and May slightly higher at 81%. For more detailed information about May weather in Surabaya, check out Surabaya weather in May.
In comparing the weather of August and June, we observe that both months feature similar maximum temperatures of 31°C (88°F), but June has a slightly higher average temperature of 24°C (75°F) compared to August's 23°C (73°F). June also experiences more precipitation, with 59 mm (2.3 in) over 12 days, while August sees significantly less at 26 mm (1.0 in) across just 6 days. Additionally, humidity levels are slightly higher in June at 81%, compared to 76% in August. For a detailed overview of the June weather in Surabaya, you can refer to Surabaya weather in June.
In comparing the weather of July and August, we observe only slight variations between the two months. August experiences a minimum temperature of 16°C (60°F) with an average of 23°C (73°F) and a maximum of 31°C (88°F), similar to July's temperatures which range from a minimum of 15°C (59°F) to a maximum of 30°C (87°F). Precipitation in August is slightly lower at 26 mm (1.0 in) over 6 days, compared to July's 28 mm (1.1 in) over 5 days. Notably, humidity is a tad higher in July at 79% versus August's 76%. For a more detailed look at July's weather, you can visit Surabaya weather in July.
In August, temperatures in Surabaya range from a minimum of 16°C (60°F) to a maximum of 31°C (88°F), with an average of 23°C (73°F). The month sees relatively low precipitation, totaling 26 mm (1.0 in) over about 6 days, and humidity levels are fairly high at 76%. In contrast, September retains a similar average temperature of 23°C (75°F), but experiences slightly warmer minimum and maximum temperatures of 17°C (62°F) and 31°C (89°F), respectively. However, September is wetter, with precipitation increasing to 49 mm (1.9 in) over 10 days, while humidity remains a bit lower at 72%. For more details on September weather conditions, check out Surabaya weather in September.
In August, the weather is typically warm with temperatures ranging from a minimum of 16°C (60°F) to a maximum of 31°C (88°F), accompanied by an average temperature of 23°C (73°F). The month sees a modest amount of precipitation at 26 mm (1.0 in) over about 6 days and maintains a relatively high humidity level of 76%. In contrast, October experiences slightly warmer temperatures, with a minimum of 18°C (65°F), an average of 24°C (75°F), and a peak temperature of 33°C (91°F). However, October is notably wetter, with 132 mm (5.2 in) of rainfall spread over 19 days, while the humidity slightly decreases to 74%. For more details, check out Surabaya weather in October.
August and November present distinct weather characteristics in Surabaya. In August, temperatures range from a minimum of 16°C (60°F) to a maximum of 31°C (88°F), with an average of 23°C (73°F) and relatively low precipitation of 26 mm (1.0 in) over about 6 days. The humidity levels hover around 76%. In contrast, November is warmer, featuring a minimum temperature of 18°C (65°F) and a maximum of 33°C (91°F), with an average of 24°C (75°F). However, this month sees a significant increase in rainfall, totaling 377 mm (14.9 in) across approximately 25 days, and slightly higher humidity at 78%. For more detailed comparisons, check out Surabaya weather in November.
In August, the weather is generally warm and pleasant, with temperatures ranging from a minimum of 16°C (60°F) to a maximum of 31°C (88°F) and an average of 23°C (73°F). The month sees relatively low precipitation, averaging about 26 mm (1.0 in) over just 6 days, and humidity levels hover around 76%.
In contrast, December experiences slightly higher minimum temperatures, starting at 19°C (67°F), while the average and maximum temperatures remain similar at 23°C (74°F) and 30°C (87°F), respectively. However, December is much wetter, with an impressive 464 mm (18.3 in) of rainfall spread over 30 days, and humidity levels rise slightly to 78%. For more detailed information, check out Surabaya weather in December.
August in Surabaya brings a pleasant reprieve from the hotter months, with average temperatures hovering around a comfortable 23°C (73°F). This month typically experiences slightly lower humidity levels, making outdoor activities more enjoyable. While precipitation is mild, with only about 26 mm over approximately six days, the weather remains relatively dry compared to the wetter months ahead. Overall, August presents an inviting blend of warmth and moderate humidity, setting the perfect backdrop for exploring the vibrant culture and stunning landscapes of Surabaya. For more insights into weather patterns, visit Surabaya Climate.