How wind carries smoke to Singapore

Smoke travels with the wind at roughly 1–2 km altitude, not at ground level. If that wind blows from a fire region toward you, haze can arrive within hours to a day; if it blows away, air often clears even while fires continue.

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Live data (Singapore's point of view)

Status: Live data temporarily unavailable

'Upwind' is a wind-direction heuristic: it says transport is likely, not proven, and is not a smoke-trajectory model.

See the source data

Which wind we use

We use the wind at the 850 hPa pressure level, about 1.5 km above the ground, because that is a typical layer for transporting smoke over long distances. Ground wind (10 m) mostly shows local mixing.

Seasonal pattern

In the south-west monsoon season (roughly June to September) winds across Sumatra often blow toward Singapore and Malaysia. In the transition months of October and November winds can turn variable, and smoke can reach Singapore from several directions.

See it on the map

The haze map draws wind arrows for the chosen hour and a PM2.5 field you can step through from 12 hours ago to 24 hours ahead.

Other causes

Fires in central Sumatra (Riau and Jambi) and Singapore's haze · Fires in South Sumatra and Singapore's haze · Fires in Kalimantan and Singapore's haze · Dry weather and El Niño · Why peat fires make such dense haze · Does rain clear haze? What showers can and cannot do

Sources

Open-Meteo weather forecast — Open-Meteo (national weather services and ECMWF models) · official site · API / docs
CAMS PM2.5 model via Open-Meteo — Copernicus Atmosphere Monitoring Service (ECMWF); served by Open-Meteo · official site · API / docs
haze.gov.sg regional haze situation and outlook — NEA, drawing on the ASEAN Specialised Meteorological Centre · official site

General information, not medical advice. Follow your doctor and your school, league or organiser's final call. Data come from official sources; see data sources.