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: 4 days

Time span: July 18 2025 to July 21 2025

Statistics over entire affected area:

• Mean temperature anomaly: 8.0 °C
• Mean temperature: -14.8 °C
• Maximum temperature anomaly: 9.9 °C
• Maximum temperature: -10.5 °C

Event center: -70.5°S 304.0°E

Area affected: 141141 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-21_304.0_-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: July 14 2025 to July 20 2025

Statistics over entire affected area:

• Mean temperature anomaly: 8.9 °C
• Mean temperature: -43.6 °C
• Maximum temperature anomaly: 15.4 °C
• Maximum temperature: -17.0 °C

Event center: -81.0°S 335.0°E

Area affected: 847034 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-14_to_2025-Jul-20_335.0_-81.0

Download data: JSON

Event type: Heat wave

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

• Antarctica

Duration: 5 days

Time span: July 10 2025 to July 14 2025

Statistics over entire affected area:

• Mean temperature anomaly: 10.2 °C
• Mean temperature: -41.6 °C
• Maximum temperature anomaly: 15.1 °C
• Maximum temperature: -32.6 °C

Event center: -88.5°S 181.5°E

Area affected: 173453 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-10_to_2025-Jul-14_181.5_-88.5

Download data: JSON

Event type: Heat wave

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

• Antarctica

Duration: 27 days

Time span: June 30 2025 to July 26 2025

Statistics over entire affected area:

• Mean temperature anomaly: 4.6 °C
• Mean temperature: -0.3 °C
• Maximum temperature anomaly: 14.3 °C
• Maximum temperature: 6.7 °C

Event center: -67.0°S 37.0°E

Area affected: 3601277 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-Jun-30_to_2025-Jul-26_37.0_-67.0

Download data: JSON

Event type: Heat wave

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

• Antarctica

Duration: 4 days

Time span: June 27 2025 to June 30 2025

Statistics over entire affected area:

• Mean temperature anomaly: 14.4 °C
• Mean temperature: -20.5 °C
• Maximum temperature anomaly: 17.6 °C
• Maximum temperature: -13.6 °C

Event center: -78.5°S 200.0°E

Area affected: 73131 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-Jun-27_to_2025-Jun-30_200.0_-78.5

Download data: JSON

Event type: Heat wave

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

• Antarctica

Duration: 9 days

Time span: June 15 2025 to June 23 2025

Statistics over entire affected area:

• Mean temperature anomaly: 9.4 °C
• Mean temperature: -28.5 °C
• Maximum temperature anomaly: 15.9 °C
• Maximum temperature: 1.5 °C

Event center: -77.5°S 78.0°E

Area affected: 2049704 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-Jun-15_to_2025-Jun-23_78.0_-77.5

Download data: JSON

Event type: Heat wave

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

• Antarctica

Duration: 8 days

Time span: June 02 2025 to June 09 2025

Statistics over entire affected area:

• Mean temperature anomaly: 9.0 °C
• Mean temperature: -10.3 °C
• Maximum temperature anomaly: 11.5 °C
• Maximum temperature: -5.4 °C

Event center: -68.5°S 299.0°E

Area affected: 84828 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-Jun-02_to_2025-Jun-09_299.0_-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: June 01 2025 to June 03 2025

Statistics over entire affected area:

• Mean temperature anomaly: 10.0 °C
• Mean temperature: -30.6 °C
• Maximum temperature anomaly: 13.9 °C
• Maximum temperature: -19.6 °C

Event center: -82.0°S 352.5°E

Area affected: 152372 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-Jun-01_to_2025-Jun-03_352.5_-82.0

Download data: JSON

Event type: Heat wave

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

• Antarctica

Duration: 6 days

Time span: May 30 2025 to June 04 2025

Statistics over entire affected area:

• Mean temperature anomaly: 10.5 °C
• Mean temperature: -20.7 °C
• Maximum temperature anomaly: 20.6 °C
• Maximum temperature: -5.6 °C

Event center: -71.0°S 169.0°E

Area affected: 1023617 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-May-30_to_2025-Jun-04_169.0_-71.0

Download data: JSON

Event type: Heat wave

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

• Antarctica

Duration: 11 days

Time span: May 27 2025 to June 06 2025

Statistics over entire affected area:

• Mean temperature anomaly: 5.0 °C
• Mean temperature: -1.4 °C
• Maximum temperature anomaly: 11.3 °C
• Maximum temperature: 3.1 °C

Event center: -68.5°S 14.0°E

Area affected: 1996253 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-May-27_to_2025-Jun-06_14.0_-68.5