24-hour PSI
Overall air quality···PSI
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Singapore time
Central Singapore
- 24-hour PSI
- —Loading readingWaiting for data.gov.sg
- 1-hour PM2.5
- — µg/m³Loading readingWaiting for data.gov.sg
Weather forecast
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Small steps still count.
YOUR REPORTING REGION
Central Singapore
Choose a region, or use your location to find the nearest reporting area.
1-hour PM2.5
Fine particles···µg/m³
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Across the island
24-hour PSI / 1-hour PM2.5Regional readings give a broad picture. Air conditions can vary within each region.
OUTDOOR ACTIVITY GUIDE
Heading out in the next few hours?
Use the latest 1-hour PM2.5 reading and NEA’s personal guide below.
01
Normal
0–55 µg/m³
Continue with normal activities.
02
Elevated
56–150 µg/m³
Reduce strenuous outdoor activity for the next hour.
Vulnerable persons: avoid strenuous outdoor activity for the next hour.
03
High
151–250 µg/m³
Avoid strenuous outdoor activity for the next hour.
Vulnerable persons: avoid all outdoor activity for the next hour.
04
Very high
≥251 µg/m³
Minimise all outdoor activity for the next hour.
Vulnerable persons: avoid all outdoor activity for the next hour.
Vulnerable persons include the elderly, pregnant women, children, and persons with chronic lung disease or heart disease.
This guide is not intended to be prescriptive. For the general population, symptoms that may arise from short-term exposure such as throat or eye irritations are expected to resolve after withdrawing from the exposure.
Planning for tomorrow? Use the 24-hour PSI forecast and corresponding health advisory. The measured 24-hour PSI above is not a forecast.
Next-day planning guidanceSource: NEA’s “How to plan your outdoor activities during haze”, June 2026. A dated reference, not a live health advisory or personalised medical advice. Check NEA’s current guidance .
THE LAST 24 HOURS
How the air has changed.
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Hourly readings for Central. The 24-hour PSI reflects pollutant averages over the past day, so its line may move more slowly. The 1-hour PM2.5 shows more recent changes.
24-hour PSI
PSI index · own scale
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1-hour PM2.5
µg/m³ · own scale
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View the readings as a table
| Reading time (SGT) | 24-hour PSI | 1-hour PM2.5 (µg/m³) |
|---|---|---|
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These are recorded readings, not a forecast. The two charts use separate vertical scales, so their line heights cannot be compared.
PLAN AHEAD
Singapore weather outlook.
See the next 24 hours for your selected region, followed by the four-day outlook for Singapore.
Weather forecasts do not predict PSI or PM2.5. Use the air readings above and the activity guide when planning outdoor activities.
Next 24 hours · Central Singapore
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The next four days
National outlook · these forecasts apply across Singapore.
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Source: NEA / Meteorological Service Singapore via data.gov.sg, under the Singapore Open Data Licence.
01 / THE READINGSPSI and PM2.5.
PSI and PM2.5.
What’s the difference?
The longer view
The 24-hour Pollutant Standards Index (PSI) summarises air quality over the past day. NEA calculates a sub-index for each of six pollutants and reports the highest as the PSI. How NEA calculates PSI.
The more recent picture
1-hour PM2.5 is the concentration of fine particles over the past hour, in micrograms per cubic metre (µg/m³). It shows more recent changes than the 24-hour PSI. The two readings use different scales, so their numbers are not directly comparable.
Making plans outdoors? Check NEA’s current health advisory for guidance that fits your situation.
Plan outdoor activities during hazeA LITTLE PREPARATION
Keep an N95
within reach.
Browse N95 mask listings and compare the details before you buy.
Explore N95 masksFROM SHOPEEVIA 10.SG/N95 ↗
FOR YOUR INDOOR SPACE
Compare air
purifier listings.
Browse air purifier listings and compare the specifications before you buy.
Explore air purifiersFROM SHOPEEVIA 10.SG/AIR-PURIFIERS ↗
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