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: 6 days

Time span: August 08 2025 to August 13 2025

Statistics over entire affected area:

• Mean temperature anomaly: 9.2 °C
• Mean temperature: -23.8 °C
• Maximum temperature anomaly: 13.6 °C
• Maximum temperature: -4.6 °C

Event center: -69.0°S 124.5°E

Area affected: 321851 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-08_to_2025-Aug-13_124.5_-69.0

Download data: JSON

Event type: Heat wave

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

• Antarctica

Duration: 4 days

Time span: August 07 2025 to August 10 2025

Statistics over entire affected area:

• Mean temperature anomaly: 9.0 °C
• Mean temperature: -9.9 °C
• Maximum temperature anomaly: 12.8 °C
• Maximum temperature: -4.5 °C

Event center: -65.5°S 91.5°E

Area affected: 123839 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-07_to_2025-Aug-10_91.5_-65.5

Download data: JSON

Event type: Heat wave

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

• Antarctica

Duration: 8 days

Time span: August 06 2025 to August 13 2025

Statistics over entire affected area:

• Mean temperature anomaly: 3.3 °C
• Mean temperature: 3.7 °C
• Maximum temperature anomaly: 13.0 °C
• Maximum temperature: 11.3 °C

Event center: -64.0°S 136.0°E

Area affected: 2689851 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-06_to_2025-Aug-13_136.0_-64.0

Download data: JSON

Event type: Heat wave

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

• Antarctica

Duration: 26 days

Time span: August 04 2025 to August 29 2025

Statistics over entire affected area:

• Mean temperature anomaly: 7.7 °C
• Mean temperature: -7.7 °C
• Maximum temperature anomaly: 18.2 °C
• Maximum temperature: 6.8 °C

Event center: -63.0°S 37.5°E

Area affected: 9551200 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-04_to_2025-Aug-29_37.5_-63.0

Download data: JSON

Event type: Heat wave

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

• Antarctica

Duration: 7 days

Time span: July 26 2025 to August 01 2025

Statistics over entire affected area:

• Mean temperature anomaly: 13.2 °C
• Mean temperature: -11.2 °C
• Maximum temperature anomaly: 22.7 °C
• Maximum temperature: -1.0 °C

Event center: -68.5°S 297.0°E

Area affected: 165839 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-Jul-26_to_2025-Aug-01_297.0_-68.5

Download data: JSON

Event type: Heat wave

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

• Antarctica

Duration: 3 days

Time span: July 25 2025 to July 27 2025

Statistics over entire affected area:

• Mean temperature anomaly: 5.0 °C
• Mean temperature: 0.6 °C
• Maximum temperature anomaly: 8.0 °C
• Maximum temperature: 2.2 °C

Event center: -64.0°S 275.5°E

Area affected: 63220 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-Jul-25_to_2025-Jul-27_275.5_-64.0

Download data: JSON

Event type: Heat wave

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

• Antarctica

Duration: 10 days

Time span: July 22 2025 to July 31 2025

Statistics over entire affected area:

• Mean temperature anomaly: 11.4 °C
• Mean temperature: -37.0 °C
• Maximum temperature anomaly: 23.9 °C
• Maximum temperature: -6.6 °C

Event center: -80.0°S 333.5°E

Area affected: 2842118 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-Jul-22_to_2025-Jul-31_333.5_-80.0

Download data: JSON

Event type: Heat wave

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

• Antarctica

Duration: 3 days

Time span: July 20 2025 to July 22 2025

Statistics over entire affected area:

• Mean temperature anomaly: 12.1 °C
• Mean temperature: -25.1 °C
• Maximum temperature anomaly: 15.1 °C
• Maximum temperature: -15.3 °C

Event center: -78.0°S 294.0°E

Area affected: 141885 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-Jul-20_to_2025-Jul-22_294.0_-78.0

Download data: JSON

Event type: Heat wave

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

• Antarctica

Duration: 3 days

Time span: July 18 2025 to July 20 2025

Statistics over entire affected area:

• Mean temperature anomaly: 8.6 °C
• Mean temperature: -18.1 °C
• Maximum temperature anomaly: 11.7 °C
• Maximum temperature: -5.1 °C

Event center: -66.5°S 53.0°E

Area affected: 103102 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-Jul-18_to_2025-Jul-20_53.0_-66.5