• Alert Level 0 | End of Dry Season for the Southern ASEAN Region
  • The downgrade of Alert Level 1 to Alert Level 0 indicates the end of dry season for the southern ASEAN region. The regional haze situation will be updated daily at 0900 UTC.

Regional Haze Situation

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MSSModerate Haze MSSDense Haze MSS 2500 ft Wind MSSLow Confidence Hotspot MSSMedium Confidence Hotspot MSSHigh Confidence Hotspot

MSS Wind Speed (km/h) MSS Rainfall (mm)

Latest Weather and Haze Situation

Wet weather and cloudy conditions were observed over most parts of the ASEAN region today, except over the northern and central parts of the Mekong sub-region where it was relatively drier. Few to isolated hotspots were detected mainly over parts of Viet Nam, Lao PDR and Thailand while few hotspots were detected in Myanmar. No significant smoke plumes were observed from recent satellite imagery.

Weather and Haze Outlook

In the coming days, wet weather conditions are forecast over most of the ASEAN region, except over the northern and central parts of the Mekong sub-region where drier conditions are forecast. Isolated hotspots and localised smoke plumes may emerge in areas facing prolonged dry conditions. The prevailing winds over areas north of the Equator are forecast to blow mainly from the northeast or east. The prevailing winds over areas south of the Equator are forecast to blow from the southwest or west.

  • 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 November 2025 – January 2026

Summary of Outlook

The Southwest Monsoon gradually transitioned into the inter-monsoon period during October 2025. During this period, prevailing winds are typically light and variable in direction across most of the region. With the monsoon rain band located close to the Equator, increased shower activity can be expected over the equatorial ASEAN region. Northeast Monsoon conditions have subsequently set in for some parts of the northern ASEAN region in October 2025 and will gradually onset for the rest of the region during November – December. These conditions are characterised by prevailing winds blowing predominantly from the northeast.

For the November 2025 to January 2026 (NDJ) period, above-normal rainfall is predicted for much of the southern and eastern Maritime Continent and southern Mainland Southeast Asia. Current ENSO state is La Niña Watch, with La Niña conditions predicted to become established in October 2025 and persist until at least the end of 2025. A negative Indian Ocean Dipole (IOD) is present and is predicted to persist until December 2025. Both La Niña and negative IOD events tend to bring wetter conditions to parts of Southeast Asia. Above-normal temperature is predicted for most of the Maritime Continent and northwestern Mainland Southeast Asia for NDJ 2025-2026.

Over the southern ASEAN region, the dry season ended on 22 October 2025. While below-normal rainfall is forecast over parts of the region during the outlook period, the hotspot activity is expected to remain subdued under the overall wet weather conditions. However, isolated hotspots with localised smoke plumes may still occur over areas experiencing periods of drier conditions. While above-normal rainfall is expected over most parts of the northern ASEAN region, the hotspot and smoke haze activity is expected to progressively intensify over the fire-prone areas of the Mekong sub-region, as its traditional dry season gradually set in with the onset of the Northeast Monsoon.

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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.

25th ASEAN COF

Related Website

ASEAN Haze Online

Recent Updates

3

Nov

Subseasonal Weather Outlook (24 November – 7 December 2025)
Drier conditions are predicted over much of Mainland Southeast Asia in Week 1 (24 – 30 November). Drier conditions are also predicted over the southern Maritime Continent in Week 2 (1 – 7 December). Wetter conditions are predicted over …
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12

Nov

25th ASEAN COF
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12

Nov

Review of Regional Haze Situation for October 2025
The Southwest Monsoon transitioned to the inter-monsoon conditions during October 2025, with the monsoon rainband shifted towards the Equator. This was characterised by light low-level winds with variable directions over most of the ASEAN region in…
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