Category: Heat waves affecting Antarctica

Download data: JSON

Event type: Heat wave

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

• Antarctica

Duration: 46 days

Time span: September 24 2025 to November 08 2025

Statistics over entire affected area:

• Mean temperature anomaly: 8.0 °C
• Mean temperature: -21.9 °C
• Maximum temperature anomaly: 21.4 °C
• Maximum temperature: 9.1 °C

Event center: -75.5°S 96.0°E

Area affected: 18384209 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-Sep-24_to_2025-Nov-08_96.0_-75.5

Download data: JSON

Event type: Heat wave

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

• Antarctica

Duration: 9 days

Time span: September 22 2025 to September 30 2025

Statistics over entire affected area:

• Mean temperature anomaly: 7.4 °C
• Mean temperature: -2.5 °C
• Maximum temperature anomaly: 15.4 °C
• Maximum temperature: 5.8 °C

Event center: -71.0°S 296.5°E

Area affected: 1411700 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-Sep-22_to_2025-Sep-30_296.5_-71.0

Download data: JSON

Event type: Heat wave

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

• Antarctica

Duration: 4 days

Time span: September 22 2025 to September 25 2025

Statistics over entire affected area:

• Mean temperature anomaly: 8.2 °C
• Mean temperature: -43.3 °C
• Maximum temperature anomaly: 10.8 °C
• Maximum temperature: -38.7 °C

Event center: -75.0°S 48.0°E

Area affected: 154276 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-Sep-22_to_2025-Sep-25_48.0_-75.0

Download data: JSON

Event type: Heat wave

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

• Antarctica

Duration: 6 days

Time span: September 10 2025 to September 15 2025

Statistics over entire affected area:

• Mean temperature anomaly: 9.3 °C
• Mean temperature: -24.6 °C
• Maximum temperature anomaly: 14.6 °C
• Maximum temperature: -7.1 °C

Event center: -70.0°S 37.5°E

Area affected: 749422 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-Sep-10_to_2025-Sep-15_37.5_-70.0

Download data: JSON

Event type: Heat wave

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

• Antarctica

Duration: 4 days

Time span: September 09 2025 to September 12 2025

Statistics over entire affected area:

• Mean temperature anomaly: 8.1 °C
• Mean temperature: -13.4 °C
• Maximum temperature anomaly: 10.7 °C
• Maximum temperature: -10.7 °C

Event center: -70.5°S 9.0°E

Area affected: 55971 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-Sep-09_to_2025-Sep-12_9.0_-70.5

Download data: JSON

Event type: Heat wave

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

• Antarctica

Duration: 12 days

Time span: September 01 2025 to September 12 2025

Statistics over entire affected area:

• Mean temperature anomaly: 7.0 °C
• Mean temperature: -17.3 °C
• Maximum temperature anomaly: 18.2 °C
• Maximum temperature: 5.7 °C

Event center: -53.0°S 83.0°E

Area affected: 3043213 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-Sep-01_to_2025-Sep-12_83.0_-53.0

Download data: JSON

Event type: Heat wave

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

• Antarctica

Duration: 5 days

Time span: September 01 2025 to September 05 2025

Statistics over entire affected area:

• Mean temperature anomaly: 9.6 °C
• Mean temperature: -37.4 °C
• Maximum temperature anomaly: 14.9 °C
• Maximum temperature: -21.9 °C

Event center: -83.0°S 145.5°E

Area affected: 79965 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-Sep-01_to_2025-Sep-05_145.5_-83.0

Download data: JSON

Event type: Heat wave

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

• Antarctica

Duration: 24 days

Time span: August 30 2025 to September 22 2025

Statistics over entire affected area:

• Mean temperature anomaly: 10.9 °C
• Mean temperature: -11.1 °C
• Maximum temperature anomaly: 27.2 °C
• Maximum temperature: 7.3 °C

Event center: -72.0°S 187.5°E

Area affected: 6231859 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-Aug-30_to_2025-Sep-22_187.5_-72.0

Download data: JSON

Event type: Heat wave

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

• Antarctica

Duration: 27 days

Time span: August 10 2025 to September 05 2025

Statistics over entire affected area:

• Mean temperature anomaly: 11.9 °C
• Mean temperature: -30.1 °C
• Maximum temperature anomaly: 28.7 °C
• Maximum temperature: 6.5 °C

Event center: -79.0°S 142.0°E

Area affected: 10649880 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-Aug-10_to_2025-Sep-05_142.0_-79.0