Jakarta ISBB (WBGT) Today — Wet Bulb Globe Temperature
Updated planning preview · 10.00 forecast from WeatherAPI
Estimated ISBB (WBGT)
27.6°C
High
Shorten hard efforts and increase recovery time.
Temperature
32°C
Humidity
46%
Heat index
34°C
UV index
7.6
Best outdoor window
16.00–8.00
Lowest combined heat and UV load in the available hourly preview.
Hourly ISBB (WBGT)
WBGT values are labeled as modeled estimates until a provider supplies measured readings.
| Time | Temperature | Heat index | Estimated ISBB (WBGT) | UV | Risk |
|---|---|---|---|---|---|
| 10 | 32°C | 34°C | 27.6°C | 7.6 | High |
| 12 | 35°C | 35°C | 27.9°C | 11.6 | High |
| 14 | 34°C | 36°C | 28.1°C | 7.8 | High |
| 16 | 33°C | 34°C | 27.2°C | 1.8 | High |
| 06 | 27°C | 28°C | 25.3°C | 0.0 | Moderate |
| 08 | 29°C | 30°C | 26.1°C | 2.2 | Moderate |
| 10 | 32°C | 34°C | 27.5°C | 8.2 | High |
| 12 | 33°C | 36°C | 28.4°C | 11.6 | High |
Today's outlook
In Jakarta, the highest modeled heat burden in this preview occurs around 12.00. The recommended window is selected from the lowest combined risk score, temperature, and UV—not from generic city copy.
Three-day forecast
Minggu
Heat index up to 36°C
35°C / 26°C
HighSenin
Heat index up to 36°C
34°C / 27°C
HighSelasa
Heat index up to 37°C
34°C / 27°C
HighToday in Jakarta
What changes across the day
Based on the available hourly WeatherAPI forecast
Peak heat index
36°C at 12.00
The preview low is 28°C around 6.00.
Feels-like difference
2°C above air temp
Current humidity is 46%, one input that changes evaporative cooling.
Peak UV
11.6 at 12.00
UV and heat are separate hazards; the lowest-heat hour may still need sun protection.
Tomorrow's direction
about steady tomorrow
Today's forecast range is 26°C–35°C.
Where these numbers come from
WeatherAPI supplies the forecast. HeatGuard calculates heat-index risk and models WBGT from forecast temperature, humidity and a daytime solar allowance. Modeled WBGT is not an on-site globe-thermometer reading.
Local planning context
Planning for heat in Jakarta, Indonesia
Jakarta's tropical heat and humidity can limit evaporative cooling throughout the day. Indonesian workplace terminology calls WBGT the Indeks Suhu Basah dan Bola, or ISBB, and uses it to assess hot working environments.
Forecasts describe outdoor conditions, not an individual's medical risk. Workload, duration, shade, clothing, acclimatization and health can change the appropriate decision.
Check Indonesia Ministry of Manpower ISBB definition ↗Keep planning
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