Air Quality Forecast
24-hr PSI Forecast: Moderate to 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, 1 October 2026 – Showers were observed over several parts of Singapore today. As at 6pm, the 1-hr PM2.5 concentration readings were 17 – 32 µg/m3, in Band 1 (Normal), and the 24-hr PSI was 60 – 73 in the Moderate range.
Update on Hotspot and Haze Situation
2. Moderate to dense smoke plumes continued to be observed in southern Sumatra and Kalimantan. Smoke haze from southern Kalimantan was observed drifting towards the vicinity of Singapore.
3. Dry conditions are expected to persist over the southern parts of Sumatra and Kalimantan. Although showers are forecast over Singapore and the surrounding region tomorrow, the prevailing southeasterly or southerly winds could transport smoke haze towards Singapore. 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.
5. 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 extensive cloud cover.
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