Regional Haze Situation

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Latest Weather and Haze Situation

Cloudy conditions were observed over many parts of the southern ASEAN region this morning. A few to isolated hotspots were detected in parts of Peninsular Malaysia, Sumatra, Java and Borneo from overnight satellite imagery. No significant smoke plumes were observed from morning satellite imagery. The hotspot and haze situation could not be fully determined due to extensive cloud cover over the region.

Over the northern ASEAN region, wet weather was observed to persist. Hotspot and haze activities were observed to remain low over the region.

Weather and Haze Outlook

Dry conditions are expected to persist over the southern ASEAN region in the coming days with isolated showers forecast over the northern and southern parts of Sumatra as well as the central parts of Kalimantan and Borneo. Showers may bring relief to the hotspot and haze situation over these areas, however isolated hotspots and smoke plumes may still persist in areas facing prolonged drier conditions with a chance of transboundary haze. The prevailing winds in the southern ASEAN region are forecast to blow mainly from the southeast.

For the northern ASEAN region, showers are forecast to continue. The hotspot and haze situation is likely to remain subdued over this area. The prevailing winds in the northern ASEAN region are forecast to blow from the southwest.

  • 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 July – August 2025

Summary of Outlook

The Southwest Monsoon conditions, which became established in June 2025, are expected to continue through the outlook period of July – September (JAS) 2025 with the prevailing low-level winds blowing mainly from the southeast or southwest. As the monsoon rain band is situated north of the Equator during this period, the southern ASEAN region typically experiences its traditional dry season while wet weather is typical over the northern ASEAN region.

For July 2025, above-normal rainfall is predicted for much of the southern Maritime Continent. The above-normal rainfall is predicted for much of the Maritime Continent during July to September (JAS). ENSO neutral conditions are predicted to persist until at least July – August 2025.  The Indian Ocean Dipole (IOD) is currently neutral. Above-normal temperature is predicted for Southeast Asia for July, with these conditions predicted to persist throughout JAS 2025.

Despite forecast of above-normal rainfall across much of the southern ASEAN region during the outlook period, the risk of transboundary smoke haze occurrence remains as hotspots with smoke plumes can still be expected over the fire-prone areas in the region,  especially during extended periods of drier weather. In the northern ASEAN region, the hotspot activity is expected to remain low under the prevailing wet weather conditions.

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Recent Updates

31

Jul

Subseasonal Weather Outlook (7 – 20 July 2025)
Drier conditions are predicted over central and eastern Mainland Southeast Asia in Week 1 (4 – 10 August). Wetter conditions are predicted over much of the mentioned area in Week 2 (11 – 17 August), with the highest likelihood over…
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16

Jul

Subseasonal Weather Outlook (21 July – 3 August 2025)
Drier conditions are predicted over much of the Maritime Continent and parts of southeastern Mainland Southeast Asia in the next fortnight (21 July – 3 August). Wetter conditions are predicted over much of the…
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03

Jul

Review of Regional Haze Situation for June 2025
Southwest Monsoon conditions became fully established over the ASEAN region in June 2025. Over much of the southern ASEAN region, the prevailing winds blew mainly from the southeast. The prevailing winds over the Mekong sub-region were mostly southwesterly or westerly while the regions close to the Equator…
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