Regional Haze Situation

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Latest Weather and Haze Situation

Scattered to widespread showers were observed over many parts of the ASEAN region today except for drier conditions observed over the southern parts of Sumatra as well as Java. A few hotspots were detected in the southern parts of Sumatra, over parts of Java as well as in Kalimantan and Sulawesi. Moderate smoke plumes were observed in the western parts of Java.

Weather and Haze Outlook

Over the next few days, showers are expected to continue over most parts of the ASEAN region except for drier conditions forecast over the southern and central parts of Sumatra, as well as over parts of Java and the Lesser Sunda Islands. Isolated hotspots and localised smoke plumes can emerge in areas facing drier conditions. The prevailing winds over the Mekong sub-region are forecast to blow from the southwest. The prevailing winds over the Philippines and the southern ASEAN region are forecast to blow from the east to southeast, except for parts of Borneo where the prevailing winds 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 June – August 2026

Summary of Outlook

Inter-monsoon conditions typically transition gradually into the Southwest Monsoon in June, with prevailing winds shifting to blow mainly from the southeast or southwest. The northern ASEAN region typically experiences its traditional wet season due to an increase in shower activities as the monsoon rainband moves northwards. In contrast, the southern ASEAN region typically experiences its traditional dry season during the outlook period.

For June 2026, below- to near-normal rainfall is predicted over much of the southern ASEAN region. During June – August (JJA) 2026, below-normal rainfall is predicted to persist for the southern ASEAN region, while a mix of below- to above-normal rainfall is predicted for the northern ASEAN region. ENSO-neutral conditions are predicted to transition to El Niño conditions in June-July 2026. El Niño conditions tend to lead to an increased chance of below-normal rainfall for much of the southern ASEAN region during June – August.

As the southern ASEAN region enters its traditional dry season, and with below-normal rainfall expected over most parts of the region, an increase in hotspot and smoke haze activity is expected. This can lead to a heightened risk of transboundary haze occurrence under the prevailing southeasterly or southwesterly winds in the region. The situation could intensify when El Niño conditions develop. The hotspot and smoke haze situation is expected to remain subdued over the Mekong sub-region as showers continue during the outlook period.

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ASEAN Climate Outlook Forum

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

26th ASEAN COF

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ASEAN Haze Online

Recent Updates

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June

26th ASEAN COF
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4

June

Subseasonal Weather Outlook (8 – 21 June 2026)
Wetter conditions are predicted over much of western and northern Mainland Southeast Asia in Week 1 (8 – 14 June). Drier conditions are predicted over the southern Maritime Continent during the next fortnight (8 – 21 June). Drier conditions are also predicted…
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06

June

Summary of Outlook for June – August 2026 (JJA)
Inter-monsoon conditions typically transition gradually into the Southwest Monsoon in June, with prevailing winds shifting to blow mainly from the southeast or southwest. The northern ASEAN region typically experiences its traditional wet season due to an increase in shower activities as the monsoon rainband moves northwards. In contrast, the southern ASEAN region typically experiences its traditional dry season during the outlook period…
More details