Haze Situation Update (26 September 2026)

Air Quality Forecast

24-hr PSI Forecast: Moderate – Low Unhealthy

Health Advisory

Healthy persons: If 24-hr PSI is Moderate, normal activities. If 24-hr PSI is Unhealthy, reduce prolonged or strenuous outdoor physical exertion. If 1-hr PM2.5 is Normal (Band 1), normal activities. If 1-hr PM2.5 is Elevated (Band 2), reduce strenuous outdoor activity for the next hour.
Elderly, pregnant women & children: If 24-hr PSI is Moderate, normal activities. If 24-hr PSI is Unhealthy, minimise prolonged or strenuous outdoor physical exertion. If 1-hr PM2.5 is Normal (Band 1), normal activities. If 1-hr PM2.5 is Elevated (Band 2), avoid strenuous outdoor activity for the next hour.
Persons with chronic lung/heart disease: If 24-hr PSI is Moderate, normal activities. If PSI is Unhealthy, avoid prolonged or strenuous outdoor physical exertion. If 1-hr PM2.5 is Normal (Band 1), normal activities. If 1-hr PM2.5 is Elevated (Band 2), avoid strenuous outdoor activity for the next hour.

Refer to the 1-hr PM2.5 for immediate activities, and the 24-hr PSI forecast to plan ahead.

Singapore, 26 September 2026 – It was dry over Singapore today. As at 6pm, the 1-hr PM2.5 concentration readings were 46 – 96 µg/m3, in (Band 1, Normal / Band 2, Elevated), and the 24-hr PSI was 71 – 96 in the Moderate range.

Update on Hotspot and Haze Situation

2.         Moderate to dense smoke haze from fires in Kalimantan drifted towards Singapore. Smoke plumes were also observed to emanate from fires in southern Sumatra.                    

3.         While some showers are forecast over Singapore and parts of the surrounding region overnight and tomorrow, dry conditions are expected to continue over southern Sumatra and the southern and eastern parts of Kalimantan. There could be a risk of smoke haze affecting Singapore as the prevailing winds are forecast to blow from the southeast or southwest. The 24-hr PSI for Singapore is forecast to be in the Moderate to Low Unhealthy range.                          

Activity Guidelines

4.         The health impact of haze is dependent on one’s health status, the PSI level, and the length and intensity of outdoor activity. For immediate outdoor activities, please check the 1-hr PM2.5 concentration readings and personal guide. Use the 24-hr PSI forecast and corresponding health advisories for planning next day outdoor activities.