Category: Extremes affecting Antarctica

Download data: JSON

Event type: Heat wave

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

• Antarctica

Duration: 4 days

Time span: October 02 2025 to October 05 2025

Statistics over entire affected area:

• Mean temperature anomaly: 8.7 °C
• Mean temperature: -10.1 °C
• Maximum temperature anomaly: 13.6 °C
• Maximum temperature: -3.3 °C

Event center: -66.0°S 121.0°E

Area affected: 129569 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-Oct-02_to_2025-Oct-05_121.0_-66.0

Download data: JSON

Event type: Heat wave

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

• Antarctica

Duration: 7 days

Time span: September 26 2025 to October 02 2025

Statistics over entire affected area:

• Mean temperature anomaly: 9.2 °C
• Mean temperature: -20.7 °C
• Maximum temperature anomaly: 15.3 °C
• Maximum temperature: -12.0 °C

Event center: -83.0°S 160.0°E

Area affected: 78776 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-26_to_2025-Oct-02_160.0_-83.0

Download data: JSON

Event type: Heat wave

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

• Antarctica

Duration: 14 days

Time span: September 25 2025 to October 08 2025

Statistics over entire affected area:

• Mean temperature anomaly: 8.5 °C
• Mean temperature: -17.6 °C
• Maximum temperature anomaly: 18.5 °C
• Maximum temperature: 3.7 °C

Event center: -70.5°S 161.5°E

Area affected: 1591014 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-25_to_2025-Oct-08_161.5_-70.5

Download data: JSON

Event type: Heat wave

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

• Antarctica

Duration: 7 days

Time span: September 24 2025 to September 30 2025

Statistics over entire affected area:

• Mean temperature anomaly: 7.2 °C
• Mean temperature: -23.9 °C
• Maximum temperature anomaly: 10.7 °C
• Maximum temperature: -17.4 °C

Event center: -79.0°S 277.5°E

Area affected: 210431 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-Sep-30_277.5_-79.0

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