Singaporeans woke up to hazy skies and the faint smell of smoke on October 9, but this time it wasn’t just a passing whiff. The 24-hour Pollutant Standards Index (PSI) in central Singapore hit 191 at 4pm, officially entering the unhealthy range and setting a record high for 2026, according to the National Environment Agency (NEA). With regional fires still burning, officials warn that the haze could linger for days, and they’re urging residents to take precautions—especially vulnerable groups.
Where Is the Smoke Coming From?
The haze originates from outside Singapore’s borders. The NEA reports clusters of hotspots across central and southern Sumatra, as well as parts of Kalimantan in Indonesia. Moderate to dense smoke haze is also affecting parts of Borneo, Sumatra, and southern Peninsular Malaysia. Satellite images show smoke plumes drifting from hotspots in southern Kalimantan and central and southern Sumatra. With dry conditions persisting across the region, the haze situation is expected to remain elevated. Whether more smoke reaches Singapore depends on wind patterns, which are currently forecast to blow from the southeast or south.
What Do the PSI Readings Show?
At 4pm today, the 24-hour PSI reading reached 191 in central Singapore—well above the 100-point threshold that marks the start of the unhealthy range. All five regions of the island registered readings in this unhealthy band, with western Singapore following closely at 183. For context, a PSI reading between 101 and 200 is considered unhealthy, and the NEA advises limiting outdoor activities at this level.
Beyond the smoky smell, regional fires are releasing fine particles known as PM2.5. These tiny pollutants can travel deep into the lungs when inhaled, posing a greater health risk than larger particles. This is why the haze feels more than just a nuisance—it can have real consequences for respiratory health.
Why Do Conditions Vary Across the Island?
Haze conditions are not uniform across Singapore. Wind direction and the movement of smoke plumes mean that air quality can differ significantly from one neighbourhood to another. On October 9, central Singapore recorded the highest PSI reading in the morning, but other regions may see different levels at different times. A clearer sky in one area doesn’t guarantee the same air quality elsewhere, and shifting regional weather patterns mean conditions can change throughout the day.
Can I Still Go Out?
If the haze looks thick, it’s wise to reconsider strenuous outdoor plans. When the PSI enters the unhealthy range (101 to 200), the NEA recommends reducing outdoor activities. This is especially important for vulnerable groups, including children, older adults, pregnant women, and individuals with heart or lung conditions. For healthy individuals, heading out is still possible, but it’s best to keep vigorous exercise to a minimum. If you experience eye irritation, a sore throat, or breathing discomfort, the NEA advises moving indoors and reducing exposure.
Which Air Quality Reading Should You Trust?
The NEA suggests paying attention to two different metrics. The 24-hour PSI is best for planning your day, while the 1-hour PM2.5 reading is more useful for immediate decisions about going outside. PM2.5 refers to fine particles produced by the fires that can travel deep into the lungs. When PSI levels are in the unhealthy range (101–200), the NEA recommends limiting outdoor activities, particularly for children, older adults, pregnant women, and those with heart or lung conditions.
What Should You Do Now?
If you’re generally healthy, you can still go about your day, but consider scaling back strenuous outdoor exercise. If you experience irritation or breathing discomfort, head indoors and reduce your exposure. For the most up-to-date information, check the NEA’s haze website or the myENV app, which provide both 24-hour PSI readings and real-time one-hour PM2.5 levels. The former is best for planning your day; the latter helps with immediate decisions about stepping outside.
The Bottom Line
The haze is a reminder of how interconnected the region is—and how quickly local air quality can shift. While the NEA advises limiting outdoor activities across the island, the situation remains fluid depending on wind direction and fire hotspots. Staying informed through official channels is your best bet for navigating the coming days safely. If you’re in a vulnerable group, or simply feel uncomfortable outdoors, heed the advisories and keep indoor air quality in mind. The haze may be thick, but a little preparation goes a long way.