Key Takeaways
- • Singapore's air quality improved for a second straight day on Monday, Oct 19, 2026, with the National Environment Agency (NEA) attributing the gains to south-southeasterly winds and showers in the vicinity.
- • At 6pm on Oct 19, PSI readings ranged from 88 in the southern region to 114 in western Singapore, with western (114) and central (105) regions in the low-unhealthy range.
- • Hourly PM2.5 concentrations ranged from 51 in eastern Singapore to 79 in the central region at 6pm.
- • NEA warned that smoke haze could return from Tuesday night, Oct 20, through Thursday, Oct 22, as east-southeasterly winds bring smoke from fires in Kalimantan.
- • Smoke haze from Kalimantan and Sumatra was still observed in the vicinity of Singapore on Monday, according to NEA.
Summary
Singapore's air quality continued to improve on Monday, Oct 19, 2026, with sunshine, clearer skies and fresher air persisting into a second day, according to the National Environment Agency (NEA). The improvement was driven by a favourable wind direction, with the NEA attributing it to winds turning to blow from the south-southeast and showers in the vicinity.
Throughout the day, hourly PM2.5 levels were mostly within the normal band of 0 to 55 µg/m3 in the northern, eastern and southern regions, and 24-hour Pollutant Standards Index (PSI) readings in those areas remained in the good-to-moderate range. Central and western Singapore recorded concentrations in the low-elevated band, with PSI dropping towards the low-unhealthy range.
At 6pm, PM2.5 concentrations ranged from 51 in eastern Singapore to 79 in the central region. PSI readings were in the low-unhealthy range in western (114) and central (105) Singapore, while southern (88), northern (89) and eastern (91) regions remained in the good-to-moderate range.
Despite the improvement, NEA said smoke haze from Kalimantan and Sumatra was still observed in the vicinity of Singapore. For Tuesday, residents can expect showers over Singapore and the surrounding region. Under south-southeasterly winds, smoke haze from Kalimantan may again be reduced, though smoke from Sumatra may still drift towards Singapore.
The agency cautioned, however, that the three-day stretch of better air quality may not last. NEA warned that Singapore could again experience smoke haze from Tuesday night until Thursday, Oct 22, as winds are likely to turn east-southeasterly with dry conditions forecast over the surrounding region, including parts of Kalimantan. "This may bring smoke haze from fires in Kalimantan towards Singapore," the agency said.
Throughout the day, hourly PM2.5 levels were mostly within the normal band of 0 to 55 µg/m3 in the northern, eastern and southern regions, and 24-hour Pollutant Standards Index (PSI) readings in those areas remained in the good-to-moderate range. Central and western Singapore recorded concentrations in the low-elevated band, with PSI dropping towards the low-unhealthy range.
At 6pm, PM2.5 concentrations ranged from 51 in eastern Singapore to 79 in the central region. PSI readings were in the low-unhealthy range in western (114) and central (105) Singapore, while southern (88), northern (89) and eastern (91) regions remained in the good-to-moderate range.
Despite the improvement, NEA said smoke haze from Kalimantan and Sumatra was still observed in the vicinity of Singapore. For Tuesday, residents can expect showers over Singapore and the surrounding region. Under south-southeasterly winds, smoke haze from Kalimantan may again be reduced, though smoke from Sumatra may still drift towards Singapore.
The agency cautioned, however, that the three-day stretch of better air quality may not last. NEA warned that Singapore could again experience smoke haze from Tuesday night until Thursday, Oct 22, as winds are likely to turn east-southeasterly with dry conditions forecast over the surrounding region, including parts of Kalimantan. "This may bring smoke haze from fires in Kalimantan towards Singapore," the agency said.
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