Heat wave in Australia, 20 to 30 August 2025

Name: Heat wave in Australia, 20 to 30 August 2025
Start: 2025-08-20
End: 2025-08-30
Location: Australia

Heat wave in Australia, 20 to 30 August 2025: 113 records at 84 stations, peak on 27 August 2025. Closed.

Data as of 2026-10-17. Last revised 17 October 2026 (2026-10-17).

Key Facts

Heat wave in Australia, 20 to 30 August 2025 set or tied 113 station records at 84 stations.
It ran from 20 August 2025 to 30 August 2025 (11 days) and its peak day was 27 August 2025.
Status: closed.
Cairns Aero set a daily record high maximum temperature of 31.3 C (88.3 F) on 24 August 2025.
The busiest day was 27 August 2025 with 29 records.
The oldest broken record in the ranked list had stood for 80 years.

Footprint

20 to 30 August 2025

The area covered by Heat wave in Australia, 20 to 30 August 2025 is outlined, with 16 of the stations that set records marked, coloured by record type. Made with Natural Earth.

Footprint of Heat wave in Australia, 20 to 30 August 2025: stations that set records in the event
Station	Type	Value	Date
Cairns Aero	Record high maximum temperature	31.3 C (88.3 F)	2025-08-24
Maatsuyker Island Lighthouse	Record high maximum temperature	18.0 C (64.4 F)	2025-08-21
Cardwell Marine Pde	Record high minimum temperature	23.3 C (73.9 F)	2025-08-26
Narooma Rvcp	Record high minimum temperature	14.2 C (57.6 F)	2025-08-27
Low Isles Lighthouse	Record high maximum temperature	30.9 C (87.6 F)	2025-08-28
Walkamin Research Station	Record high maximum temperature	33.0 C (91.4 F)	2025-08-28
Butlers Gorge	Record high maximum temperature	13.3 C (55.9 F)	2025-08-21
Mount Gambier Aero	Record high minimum temperature	11.6 C (52.9 F)	2025-08-22
Lake Cargelligo Airport	Record high minimum temperature	11.8 C (53.2 F)	2025-08-27
Scoresby Research Institute	Record high maximum temperature	20.5 C (68.9 F)	2025-08-21
Whyalla Aero	Record high minimum temperature	14.1 C (57.4 F)	2025-08-22
Moruya Heads Pilot Station	Record high minimum temperature	15.7 C (60.3 F)	2025-08-27
Mackay Aero	Record high maximum temperature	29.8 C (85.6 F)	2025-08-28
Keith	Record high minimum temperature	11.4 C (52.5 F)	2025-08-22
Coonawarra	Record high minimum temperature	12.1 C (53.8 F)	2025-08-22
Montague Island Lighthouse	Record high minimum temperature	16.1 C (61.0 F)	2025-08-27

Records per Day

Peak day 29

Records set or tied each day from 20 August 2025 to 30 August 2025. The most in one day was 29 on 27 August 2025.

Records per day during Heat wave in Australia, 20 to 30 August 2025
Date	Records
2025-08-20	4
2025-08-21	20
2025-08-22	22
2025-08-23	6
2025-08-24	1
2025-08-25	5
2025-08-26	8
2025-08-27	29
2025-08-28	10
2025-08-29	5
2025-08-30	3

Top Records by Margin

Margin over the record replaced

Top records of Heat wave in Australia, 20 to 30 August 2025 ranked by margin
Moruya Heads Pilot Station, 08-27	2.2 C (4.0 F)
Whyalla Aero, 08-22	2.1 C (3.8 F)
Maatsuyker Island Lighthouse, 08-21	1.9 C (3.4 F)
Coonawarra, 08-22	1.9 C (3.4 F)
Cardwell Marine Pde, 08-28	1.7 C (3.1 F)
Mackay Aero, 08-28	1.6 C (2.9 F)
Cardwell Marine Pde, 08-29	1.5 C (2.7 F)
Narooma Rvcp, 08-27	1.4 C (2.5 F)
Walkamin Research Station, 08-28	1.3 C (2.3 F)
Cardwell Marine Pde, 08-27	1.2 C (2.2 F)
Cairns Aero, 08-24	1.0 C (1.8 F)
Low Isles Lighthouse, 08-28	0.9 C (1.6 F)
Mount Gambier Aero, 08-22	0.7 C (1.3 F)
Keith, 08-22	0.7 C (1.3 F)
Scoresby Research Institute, 08-21	0.5 C (0.9 F)

Margin is how far the new value is beyond the record it replaced. Ties are not shown.

Margin Against Age of the Broken Record

113 records plotted by how far they beat the old record (across) and how many years the old record had stood (up). Long standing records beaten by a wide margin sit in the top right.

Margin against age of the broken record in Heat wave in Australia, 20 to 30 August 2025
Margin (C)	Years the old record stood
1.0	80
1.9	62
0.9	56
1.3	56
0.3	37
1.4	51
0.1	25
0.1	62
0.7	42
0.1	56
2.1	39
1.2	40
1.7	0
1.6	24
2.2	26
0.5	48
0.7	42
1.9	39
1.5	0
0.1	19
3.1	10
0.1	10
0.1	43
0.3	43
0.7	0
0.4	42
2.1	14
0.2	24
0.2	24
0.7	30
0.6	20
1.1	27
1.1	27
1.6	14
0.5	28
1.3	16
1.3	16
0.1	32
0.9	22
0.2	30
1.8	10
1.4	20
1.0	24
0.4	36
2.0	26
1.2	26
1.0	19
1.8	12
1.8	10
0.6	26
0.5	27
0.5	30
0.3	30
0.2	30
0.5	28
1.8	14
0.8	18
0.1	30
0.6	26
2.1	10
0.3	20
2.3	4
1.3	14
0.4	24
0.8	20
1.5	16
0.5	19
0.3	26
0.8	19
0.4	14
0.9	10
0.1	24
0.8	8
1.2	0
0.5	10
0.3	26
0.3	20
0.7	0
0.5	14
0.6	16
1.8	0
0.2	10
0.5	10
1.2	2
0.4	14
0.4	16
1.1	12
0.5	10
1.0	0
1.6	4
0.3	14
0.1	14
0.3	2
0.2	4
0.2	14
0.7	11
0.7	10
0.5	10
0.2	2
0.3	0
0.6	10
0.1	0
0.5	0
1.2	0
0.1	12
0.1	11
0.2	0
0.6	0
0.7	2
0.4	0
0.2	6
0.6	2
0.1	2

Compared With Other Events

Station records per event

Station records in Heat wave in Australia, 20 to 30 August 2025 compared with similar events
Heat wave in United States and Mexico, 16 January to 14 February 2024	9,869 records
Heat wave in United States, 28 January to 24 February 2026	6,528 records
Heat wave in United States and Mexico, 24 May to 19 June 2020	5,047 records
Heat wave in United States and Mexico, 26 March to 17 April 2021	3,669 records
Heat wave in Germany and 49 other countries, 18 December 2021 to 15 January 2022	3,626 records
Heat wave in Australia, 20 to 30 August 2025 (this event)	113 records

Every Record Set

20 of 113

Every record set or tied during Heat wave in Australia, 20 to 30 August 2025, in date order
Date	Station	Record	Value	Margin	Years stood	Significance
2025-08-21	Maatsuyker Island Lighthouse	Record high maximum temperature	18.0 C (64.4 F)	1.9 C (3.4 F)	62	32 of 100 (Routine)
2025-08-21	Butlers Gorge	Record high maximum temperature	13.3 C (55.9 F)	0.1 C (0.2 F)	62	24 of 100 (Routine)
2025-08-21	Scoresby Research Institute	Record high maximum temperature	20.5 C (68.9 F)	0.5 C (0.9 F)	48	21 of 100 (Routine)
2025-08-22	Mount Gambier Aero	Record high minimum temperature	11.6 C (52.9 F)	0.7 C (1.3 F)	42	22 of 100 (Routine)
2025-08-22	Whyalla Aero	Record high minimum temperature	14.1 C (57.4 F)	2.1 C (3.8 F)	39	21 of 100 (Routine)
2025-08-22	Keith	Record high minimum temperature	11.4 C (52.5 F)	0.7 C (1.3 F)	42	20 of 100 (Routine)
2025-08-22	Coonawarra	Record high minimum temperature	12.1 C (53.8 F)	1.9 C (3.4 F)	39	20 of 100 (Routine)
2025-08-24	Cairns Aero	Record high maximum temperature	31.3 C (88.3 F)	1.0 C (1.8 F)	80	38 of 100 (Notable)
2025-08-26	Cardwell Marine Pde	Record high minimum temperature	23.3 C (73.9 F)	0.3 C (0.5 F)	37	27 of 100 (Routine)
2025-08-27	Narooma Rvcp	Record high minimum temperature	14.2 C (57.6 F)	1.4 C (2.5 F)	51	27 of 100 (Routine)
2025-08-27	Lake Cargelligo Airport	Record high minimum temperature	11.8 C (53.2 F)	0.1 C (0.2 F)	56	22 of 100 (Routine)
2025-08-27	Cardwell Marine Pde	Record high minimum temperature	23.0 C (73.4 F)	1.2 C (2.2 F)	40	21 of 100 (Routine)
2025-08-27	Moruya Heads Pilot Station	Record high minimum temperature	15.7 C (60.3 F)	2.2 C (4.0 F)	26	21 of 100 (Routine)
2025-08-27	Montague Island Lighthouse	Record high minimum temperature	16.1 C (61.0 F)	0.1 C (0.2 F)	19	20 of 100 (Routine)
2025-08-28	Low Isles Lighthouse	Record high maximum temperature	30.9 C (87.6 F)	0.9 C (1.6 F)	56	27 of 100 (Routine)
2025-08-28	Walkamin Research Station	Record high maximum temperature	33.0 C (91.4 F)	1.3 C (2.3 F)	56	27 of 100 (Routine)
2025-08-28	Cardwell Marine Pde	Record high minimum temperature	25.0 C (77.0 F)	1.7 C (3.1 F)	0	21 of 100 (Routine)
2025-08-28	Mackay Aero	Record high maximum temperature	29.8 C (85.6 F)	1.6 C (2.9 F)	24	21 of 100 (Routine)
2025-08-29	Cardwell Marine Pde	Record high minimum temperature	26.5 C (79.7 F)	1.5 C (2.7 F)	0	20 of 100 (Routine)
2025-08-30	Cairns Aero	Record high maximum temperature	31.5 C (88.7 F)	0.1 C (0.2 F)	25	25 of 100 (Routine)

The daily ledgers keep a limited number of records per day, so this list has 20 of the 113 records the event counts. The counts above use the full total.

Download the Data

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-17. Events are found by this site from station records and are not official designations. Records are provisional until reprocessed.

Margin (C)	Years the old record stood
1.0	80
1.9	62
0.9	56
1.3	56
0.3	37
1.4	51
0.1	25
0.1	62
0.7	42
0.1	56
2.1	39
1.2	40
1.7	0
1.6	24
2.2	26
0.5	48
0.7	42
1.9	39
1.5	0
0.1	19
3.1	10
0.1	10
0.1	43
0.3	43
0.7	0
0.4	42
2.1	14
0.2	24
0.2	24
0.7	30
0.6	20
1.1	27
1.1	27
1.6	14
0.5	28
1.3	16
1.3	16
0.1	32
0.9	22
0.2	30
1.8	10
1.4	20
1.0	24
0.4	36
2.0	26
1.2	26
1.0	19
1.8	12
1.8	10
0.6	26
0.5	27
0.5	30
0.3	30
0.2	30
0.5	28
1.8	14
0.8	18
0.1	30
0.6	26
2.1	10
0.3	20
2.3	4
1.3	14
0.4	24
0.8	20
1.5	16
0.5	19
0.3	26
0.8	19
0.4	14
0.9	10
0.1	24
0.8	8
1.2	0
0.5	10
0.3	26
0.3	20
0.7	0
0.5	14
0.6	16
1.8	0
0.2	10
0.5	10
1.2	2
0.4	14
0.4	16
1.1	12
0.5	10
1.0	0
1.6	4
0.3	14
0.1	14
0.3	2
0.2	4
0.2	14
0.7	11
0.7	10
0.5	10
0.2	2
0.3	0
0.6	10
0.1	0
0.5	0
1.2	0
0.1	12
0.1	11
0.2	0
0.6	0
0.7	2
0.4	0
0.2	6
0.6	2
0.1	2

Margin (C)	Years the old record stood
1.0	80
1.9	62
0.9	56
1.3	56
0.3	37
1.4	51
0.1	25
0.1	62
0.7	42
0.1	56
2.1	39
1.2	40
1.7	0
1.6	24
2.2	26
0.5	48
0.7	42
1.9	39
1.5	0
0.1	19
3.1	10
0.1	10
0.1	43
0.3	43
0.7	0
0.4	42
2.1	14
0.2	24
0.2	24
0.7	30
0.6	20
1.1	27
1.1	27
1.6	14
0.5	28
1.3	16
1.3	16
0.1	32
0.9	22
0.2	30
1.8	10
1.4	20
1.0	24
0.4	36
2.0	26
1.2	26
1.0	19
1.8	12
1.8	10
0.6	26
0.5	27
0.5	30
0.3	30
0.2	30
0.5	28
1.8	14
0.8	18
0.1	30
0.6	26
2.1	10
0.3	20
2.3	4
1.3	14
0.4	24
0.8	20
1.5	16
0.5	19
0.3	26
0.8	19
0.4	14
0.9	10
0.1	24
0.8	8
1.2	0
0.5	10
0.3	26
0.3	20
0.7	0
0.5	14
0.6	16
1.8	0
0.2	10
0.5	10
1.2	2
0.4	14
0.4	16
1.1	12
0.5	10
1.0	0
1.6	4
0.3	14
0.1	14
0.3	2
0.2	4
0.2	14
0.7	11
0.7	10
0.5	10
0.2	2
0.3	0
0.6	10
0.1	0
0.5	0
1.2	0
0.1	12
0.1	11
0.2	0
0.6	0
0.7	2
0.4	0
0.2	6
0.6	2
0.1	2