Regional Haze Situation

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Latest Weather and Haze Situation

Showers and generally cloudy conditions were observed over most parts of the ASEAN region today, except over the northeastern part of the Mekong sub-region and Java where it was relatively drier. Few to isolated hotspots were detected over Sulawesi, the Lesser Sunda Islands, the central parts of Viet Nam, the southern parts of Sumatra and the eastern parts of Kalimantan. Moderate to dense smoke haze was observed in the southern parts of Papua, Sulawesi and Kalimantan. The full extent of the hotspot and smoke haze situation could not be fully determined due to cloud cover.

Weather and Haze Outlook

For the next few days, showers and cloudy conditions are expected over the ASEAN region. The hotspot and smoke haze situation is likely to remain subdued. Isolated hotspots and localised smoke plumes may still develop in areas facing drier conditions. Over the northern ASEAN region, the prevailing winds are expected to blow from the northeast to east while the prevailing winds over the southern ASEAN region are forecast to be light and variable in direction.

  • All maps are to be used solely for displaying meteorological/geophysical information, and not for any other purpose. All maps are not to scale and for illustrative purpose only.
  • The hotspots depicted on the map are derived from the NOAA satellite and they represent locations with possible fires. Hotspots may go undetected due to cloudy conditions or incomplete satellite pass.
  • At Alert Level 0 and Alert Level 1, the regional haze situation is updated once a day at 0900 UTC. The regional haze situation is updated more frequently at 0300 UTC and 0900 UTC upon activation of Alert Level 2 or Alert Level 3. Updates at 0300 UTC display hotspot information from night-time passes of the NOAA-20 satellite. Fewer hotspots were typically detected at night as fire activities usually peak during the day.
  • Reprocessed satellite data will be availed at a later timing. The hotspot information derived from satellite data reprocessed may differ slightly from that received near real-time but reprocessing is necessary for better quality data.
  • The 2500 ft winds (depicted by arrows) are model analysis winds.

Seasonal Forecast for October – December 2026

Summary of Outlook

Southwest Monsoon conditions prevailed over the ASEAN region for most of October 2026, with prevailing winds blowing predominantly from the southeast or southwest. During this period, the southern ASEAN region continued to experience its traditional dry season, while wet conditions persisted over the northern ASEAN region. Towards the end of October 2026, winds became light and variable as inter-monsoon conditions gradually became established, even as some ASEAN countries had already declared the onset of the Northeast Monsoon. With the southward shift of the monsoon rainband towards the Equator, rainfall is expected to increase over the southern ASEAN region in the coming weeks.

For November 2026, below-normal rainfall is predicted for the southern and northeastern Maritime Continent, with the highest probability over the northeastern region, and over southeastern Mainland Southeast Asia. During November 2026 – January 2027 (NDJ), models predict below-normal rainfall to persist over parts of the southeastern and northeastern Maritime Continent and southeastern Mainland Southeast Asia. The Relative Nino3.4 index supports the presence of strong El Niño conditions. El Niño conditions are expected to continue into early 2027, with the Relative Nino3.4 index predicted to peak sometime during October-December 2026. El Niño conditions tend to lead to an increased chance of below-normal rainfall for much of the southern and northeastern Maritime Continent region and parts of eastern Mainland Southeast Asia at this time of the year. During November 2026 and NDJ 2026/2027, above-normal temperature is predicted over the ASEAN region.

The overall hotspot and smoke haze situation across the southern ASEAN region is expected to improve with the onset of inter-monsoon conditions. Under these conditions, the risk of transboundary haze is expected to be low. However, hotspots with localised smoke plumes may still occur under the prevailing El Niño conditions, particularly in areas where below-normal rainfall is expected. Towards the end of the year, the northern ASEAN region is expected to enter its traditional dry season, with a potential increase in hotspot and smoke haze activity, particularly in areas experiencing below-normal rainfall.

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Recent Updates

5

Nov

Seasonal Forecast for November 2026 – January 2027
Southwest Monsoon conditions prevailed over the ASEAN region for most of October 2026, with prevailing winds blowing predominantly from the southeast or southwest. During this period, the southern ASEAN region continued to experience its traditional dry season, while wet conditions persisted over the northern ASEAN region. Towards the end of October 2026…
More details

4

Nov

Subseasonal Weather Outlook (9 – 22 November 2026)
Drier than usual conditions are predicted over much of the central and southern Maritime Continent and parts of the eastern Maritime Continent during Week 1 (9 – 15 November). Drier than usual conditions are also…
More details

29

Oct

Review of Regional Haze Situation for September 2026
Southwest monsoon conditions persisted over the ASEAN region in September 2026, except over the northern parts of Sumatra and Peninsular Malaysia where showers were observed. The prevailing low-level winds blew mainly from the southeast over areas south of the Equator and turned to blow from the southwest or west over areas north of the Equator…
More details