Category: Heat waves affecting Indonesia

Heat wave occuring from January 03 2026 to January 09 2026 at -5.5°S 103.5°E

Download data: JSON

Event type: Heat wave

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • Indonesia

Duration: 7 days

Time span: January 03 2026 to January 09 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 1.4 °C
  • Mean temperature: 27.8 °C
  • Maximum temperature anomaly: 2.2 °C
  • Maximum temperature: 29.0 °C

Event center: -5.5°S 103.5°E

Area affected: 694922 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Heat_wave_2026-Jan-03_to_2026-Jan-09_103.5_-5.5

Heat wave occuring from February 26 2026 to March 12 2026 at -2.0°S 139.5°E

Download data: JSON

Event type: Heat wave

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • Indonesia
  • Papua New Guinea

Duration: 15 days

Time span: February 26 2026 to March 12 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 1.2 °C
  • Mean temperature: 28.2 °C
  • Maximum temperature anomaly: 2.7 °C
  • Maximum temperature: 30.0 °C

Event center: -2.0°S 139.5°E

Area affected: 488077 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Heat_wave_2026-Feb-26_to_2026-Mar-12_139.5_-2.0

Heat wave occuring from February 17 2026 to February 25 2026 at 3.0°N 97.0°E

Download data: JSON

Event type: Heat wave

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • Indonesia

Duration: 9 days

Time span: February 17 2026 to February 25 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 1.4 °C
  • Mean temperature: 28.4 °C
  • Maximum temperature anomaly: 2.3 °C
  • Maximum temperature: 29.6 °C

Event center: 3.0°N 97.0°E

Area affected: 327384 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Heat_wave_2026-Feb-17_to_2026-Feb-25_97.0_3.0

Heat wave occuring from February 15 2026 to February 20 2026 at -8.0°S 132.5°E

Download data: JSON

Event type: Heat wave

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • Indonesia

Duration: 6 days

Time span: February 15 2026 to February 20 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 0.9 °C
  • Mean temperature: 28.2 °C
  • Maximum temperature anomaly: 1.4 °C
  • Maximum temperature: 28.9 °C

Event center: -8.0°S 132.5°E

Area affected: 235905 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Heat_wave_2026-Feb-15_to_2026-Feb-20_132.5_-8.0

Heat wave occuring from February 13 2026 to February 19 2026 at -3.0°S 143.0°E

Download data: JSON

Event type: Heat wave

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • Indonesia
  • Papua New Guinea

Duration: 7 days

Time span: February 13 2026 to February 19 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 0.9 °C
  • Mean temperature: 28.0 °C
  • Maximum temperature anomaly: 1.5 °C
  • Maximum temperature: 28.5 °C

Event center: -3.0°S 143.0°E

Area affected: 92662 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Heat_wave_2026-Feb-13_to_2026-Feb-19_143.0_-3.0

Heat wave occuring from February 13 2026 to February 26 2026 at -11.5°S 162.5°E

Download data: JSON

Event type: Heat wave

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • Australia
  • Indonesia
  • Papua New Guinea
  • Solomon Islands
  • Vanuatu

Duration: 14 days

Time span: February 13 2026 to February 26 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 1.3 °C
  • Mean temperature: 28.6 °C
  • Maximum temperature anomaly: 2.8 °C
  • Maximum temperature: 29.9 °C

Event center: -11.5°S 162.5°E

Area affected: 2217442 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Heat_wave_2026-Feb-13_to_2026-Feb-26_162.5_-11.5

Heat wave occuring from January 01 2026 to February 03 2026 at -1.5°S 89.5°E

Download data: JSON

Event type: Heat wave

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • India
  • Indonesia
  • Maldives

Duration: 34 days

Time span: January 01 2026 to February 03 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 1.1 °C
  • Mean temperature: 27.8 °C
  • Maximum temperature anomaly: 1.9 °C
  • Maximum temperature: 29.1 °C

Event center: -1.5°S 89.5°E

Area affected: 4512453 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Heat_wave_2026-Jan-01_to_2026-Feb-03_89.5_-1.5

Heat wave occuring from December 16 2025 to December 20 2025 at -0.5°S 111.5°E

Download data: JSON

Event type: Heat wave

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • Indonesia
  • Malaysia

Duration: 5 days

Time span: December 16 2025 to December 20 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 1.2 °C
  • Mean temperature: 26.8 °C
  • Maximum temperature anomaly: 1.7 °C
  • Maximum temperature: 28.0 °C

Event center: -0.5°S 111.5°E

Area affected: 67992 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Heat_wave_2025-Dec-16_to_2025-Dec-20_111.5_-0.5

Heat wave occuring from December 15 2025 to December 18 2025 at -3.0°S 108.0°E

Download data: JSON

Event type: Heat wave

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • Indonesia

Duration: 4 days

Time span: December 15 2025 to December 18 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 1.1 °C
  • Mean temperature: 27.7 °C
  • Maximum temperature anomaly: 2.1 °C
  • Maximum temperature: 28.4 °C

Event center: -3.0°S 108.0°E

Area affected: 67896 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Heat_wave_2025-Dec-15_to_2025-Dec-18_108.0_-3.0

Heat wave occuring from December 02 2025 to January 02 2026 at -8.5°S 110.0°E

Download data: JSON

Event type: Heat wave

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • Australia
  • India
  • Indonesia
  • Malaysia

Duration: 32 days

Time span: December 02 2025 to January 02 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 1.3 °C
  • Mean temperature: 28.0 °C
  • Maximum temperature anomaly: 7.3 °C
  • Maximum temperature: 39.1 °C

Event center: -8.5°S 110.0°E

Area affected: 4683354 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Heat_wave_2025-Dec-02_to_2026-Jan-02_110.0_-8.5