Regional Haze Situation

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Latest Weather and Haze Situation

Dry conditions were observed over Java and the Lesser Sunda Islands, while wet weather prevailed over rest of the ASEAN region. Few to isolated hotspots were detected in the northern parts of Sumatra, Sabah, Peninsular Malaysia and Viet Nam. The full extent of the hotspot and smoke haze situation could not be determined due to cloud cover.

Weather and Haze Outlook

Over the next few days, relatively drier conditions forecast over the central parts of Sumatra while showers are expected elsewhere in the ASEAN region. Isolated hotspots and localised smoke plumes may occur more frequently in fire-prone areas experiencing prolonged dry conditions. The prevailing winds over north of the Equator are forecast to blow from the south to west. The prevailing winds south of the Equator are forecast to blow mainly from the east to south.

  • 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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The ASEAN Climate Outlook Forum (ASEANCOF) is an avenue to collaboratively develop consensus-based seasonal climate outlooks and related information on a regional scale.

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Related Website

ASEAN Haze Online

Recent Updates

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…
More details

02

Jul

Subseasonal Weather Outlook (7 – 20 July 2025)
Drier conditions are predicted over southern Mainland Southeast Asia and parts of the northeastern Maritime Continent in the next fortnight (7 – 20 July). Wetter conditions are predicted over much of northern Mainland Southeast Asia in…
More details

02

Jul

Seasonal Forecast for July – September 2025
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 …
More details