Air Quality Forecast
PSI Forecast: 90 - 140 (Moderate to Unhealthy)
Health Advisory
Healthy persons :PSI Forecast-Unhealthy. To plan for 24 Oct, reduce prolonged or strenuous outdoor physical exertion. For immediate outdoor activities, use 1h PM2.5. If Normal PM2.5, continue with normal activities. If Elevated PM2.5, reduce strenuous outdoor activity.
Elderly, pregnant women & children :PSI Forecast-Unhealthy. To plan for 24 Oct, minimise prolonged or strenuous outdoor physical exertion. For immediate outdoor activities, use 1h PM2.5. If Normal PM2.5, continue with normal activities. If Elevated PM2.5, avoid strenuous outdoor activity for the next hour.
Persons with chronic lung/heart disease :PSI Forecast-Unhealthy. To plan for 24 Oct, avoid prolonged or strenuous outdoor physical exertion. For immediate outdoor activities, use 1h PM2.5. If Normal PM2.5, continue with normal activities. If Elevated PM2.5, 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, 23 October 2026 – The PSI forecast for 24 Oct 2026 is 90 – 140 (Moderate to Unhealthy).
2. The PSI forecast and corresponding health advisories should be used for planning next day outdoor activities.
3. For immediate outdoor activities, please check the 1-hr PM2.5 concentration readings and personal guide on our haze microsite (
www.haze.gov.sg) or mobile app (myENV).
Update on Hotspot and Haze Situation
4. Dry conditions continued over Singapore today. As at 6pm, the 1-hr PM2.5 concentration readings were 70 – 98 µg/m3, in (Band 2, Elevated), and the 24-hr PSI was 85 – 108, in the Moderate to Unhealthy range. Smoke haze from Sumatra was observed drifting towards Singapore. Smoke haze was also observed over Kalimantan.
5. For tomorrow, showers are forecast over Singapore and the surrounding region, although some smoke haze may be transported towards Singapore from Sumatra under prevailing south-southeasterly or south-southwesterly winds.
6. From Sunday onwards, the winds are expected to blow from the southwest or west, which may reduce the smoke haze transported to Singapore. Showers over Singapore and the vicinity could also help with the haze situation.
Activity Guidelines
7. The health impact of haze is dependent on one’s health status, the PSI level, and the length and intensity of outdoor activity.
8. For updates, visit our haze microsite (www.haze.gov.sg), the NEA website (www.nea.gov.sg), MSS website (www.weather.gov.sg), mobile app (myENV) or follow us on NEA Facebook (www.facebook.com/NEASingapore). For information on the distribution of hotspots detected over the past fortnight in the region, please refer to the ASEAN Specialised Meteorological Centre (ASMC) website at http://asmc.asean.org.
Areas with lighter smoke haze are not indicated as they cannot be clearly discerned from satellite imagery. The full extent of the hotspot and smoke haze situation could not be determined due to cloud cover.
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