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Built 2026-10-19 (19 October 2026)

Heat wave in Australia, 23 August to 3 September 2023

Heat wave in Australia, 23 August to 3 September 2023: 117 records at 47 stations, peak on 31 August 2023. Closed.

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

Key Facts

  • Heat wave in Australia, 23 August to 3 September 2023 set or tied 117 station records at 47 stations.
  • It ran from 23 August 2023 to 3 September 2023 (12 days) and its peak day was 31 August 2023.
  • Status: closed.
  • Cape Leeuwin set a daily record high maximum temperature of 24.2 C (75.6 F) on 31 August 2023.
  • The busiest day was 31 August 2023 with 28 records.
  • The oldest broken record in the ranked list had stood for 77 years.

Footprint

23 August to 3 September 2023
Footprint of Heat wave in Australia, 23 August to 3 September 2023 The area covered by Heat wave in Australia, 23 August to 3 September 2023 is outlined, with 18 of the stations that set records marked, coloured by record type.
The area covered by Heat wave in Australia, 23 August to 3 September 2023 is outlined, with 18 of the stations that set records marked, coloured by record type. Made with Natural Earth.
Footprint of Heat wave in Australia, 23 August to 3 September 2023: stations that set records in the event
StationTypeValueDate
Cape LeeuwinRecord high maximum temperature24.2 C (75.6 F)2023-08-31
PembertonRecord high maximum temperature24.5 C (76.1 F)2023-08-31
Geraldton AirportRecord high maximum temperature30.3 C (86.5 F)2023-08-26
MullewaRecord high maximum temperature31.4 C (88.5 F)2023-08-26
Salmon Gums Res.STN.Record high maximum temperature30.5 C (86.9 F)2023-08-26
DwellingupRecord high maximum temperature26.9 C (80.4 F)2023-08-31
Carnarvon AirportRecord high maximum temperature32.4 C (90.3 F)2023-08-26
Badgingarra Research STNRecord high maximum temperature26.4 C (79.5 F)2023-08-30
Rottnest IslandRecord high maximum temperature28.3 C (82.9 F)2023-08-31
NorthamRecord high maximum temperature29.7 C (85.5 F)2023-08-31
CorriginRecord high maximum temperature27.5 C (81.5 F)2023-08-31
BeverleyRecord high maximum temperature28.8 C (83.8 F)2023-08-31
NarroginRecord high maximum temperature24.7 C (76.5 F)2023-08-31
EsperanceRecord high maximum temperature30.8 C (87.4 F)2023-09-01
Wongan HillsRecord high maximum temperature32.4 C (90.3 F)2023-08-31
Kalgoorlie-Boulder AirportRecord high maximum temperature31.1 C (88.0 F)2023-09-01
Meekatharra AirportRecord high maximum temperature31.6 C (88.9 F)2023-08-26
BrooktonRecord high maximum temperature25.1 C (77.2 F)2023-08-31

Records per Day

Peak day 28
Records per day during Heat wave in Australia, 23 August to 3 September 2023 Records set or tied each day from 23 August 2023 to 3 September 2023. The most in one day was 28 on 31 August 2023. 0 8 15 23 30 08-2308-2508-2708-2908-3109-02
Records set or tied each day from 23 August 2023 to 3 September 2023. The most in one day was 28 on 31 August 2023.
Records per day during Heat wave in Australia, 23 August to 3 September 2023
DateRecords
2023-08-232
2023-08-248
2023-08-2511
2023-08-2616
2023-08-2712
2023-08-282
2023-08-295
2023-08-308
2023-08-3128
2023-09-0120
2023-09-024
2023-09-031

Top Records by Margin

Margin over the record replaced
Top records of Heat wave in Australia, 23 August to 3 September 2023 ranked by margin
Dwellingup, 08-316.1 C (11.0 F)
Esperance, 09-015.2 C (9.4 F)
Pemberton, 08-313.9 C (7.0 F)
Badgingarra Research STN, 08-303.3 C (5.9 F)
Cape Leeuwin, 08-313.1 C (5.6 F)
Rottnest Island, 08-313.0 C (5.4 F)
Salmon Gums Res.STN., 08-262.9 C (5.2 F)
Geraldton Airport, 08-262.4 C (4.3 F)
Wongan Hills, 08-312.2 C (4.0 F)
Mullewa, 08-262.0 C (3.6 F)
Carnarvon Airport, 08-261.7 C (3.1 F)
Carnarvon Airport, 08-301.7 C (3.1 F)
Brookton, 08-311.6 C (2.9 F)
Northam, 08-311.4 C (2.5 F)
Beverley, 08-311.4 C (2.5 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

Margin against age of the broken record in Heat wave in Australia, 23 August to 3 September 2023 117 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. 0 20 40 60 80 0.02.04.06.08.0 Margin (C) Years the old record stood
117 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, 23 August to 3 September 2023
Margin (C)Years the old record stood
3.177
3.964
2.473
2.073
2.960
1.373
6.112
1.764
1.764
3.350
3.08
1.417
1.360
5.233
1.429
0.850
2.217
0.760
0.560
1.650
3.316
2.624
2.824
0.128
1.521
0.628
1.24
0.94
0.417
2.616
1.640
1.328
3.212
1.38
0.748
2.524
2.524
0.745
0.34
1.736
2.924
3.69
0.621
1.916
2.028
2.124
2.128
1.236
0.117
0.54
1.128
3.424
2.710
0.924
0.90
1.324
2.18
2.016
0.19
0.636
0.636
2.016
0.228
1.29
1.124
1.624
1.616
1.00
0.236
1.124
1.610
0.416
2.08
0.516
1.78
1.69
1.78
1.710
0.524
0.820
0.724
1.88
0.616
0.88
1.610
2.08
0.19
1.29
1.38
1.120
0.516
0.910
0.710
0.98
0.322
0.220
0.99
1.312
1.116
0.512
1.010
0.49
1.29
1.08
1.08
1.08
0.22
0.110
0.58
0.68
0.42
0.68
0.68
0.58
0.49
0.62
0.14

Compared With Other Events

Station records per event
Station records in Heat wave in Australia, 23 August to 3 September 2023 compared with similar events
Heat wave in United States and Mexico, 16 January to 14 February 20249,869 records
Heat wave in United States, 28 January to 24 February 20266,528 records
Heat wave in United States and Mexico, 24 May to 19 June 20205,047 records
Heat wave in United States and Mexico, 26 March to 17 April 20213,669 records
Heat wave in Germany and 49 other countries, 18 December 2021 to 15 January 20223,626 records
Heat wave in Australia, 23 August to 3 September 2023 (this event)117 records

Every Record Set

20 of 117
Every record set or tied during Heat wave in Australia, 23 August to 3 September 2023, in date order
DateStationRecordValueMarginYears stoodSignificance
2023-08-26Geraldton AirportRecord high maximum temperature30.3 C (86.5 F)2.4 C (4.3 F)7339 of 100 (Notable)
2023-08-26MullewaRecord high maximum temperature31.4 C (88.5 F)2.0 C (3.6 F)7337 of 100 (Notable)
2023-08-26Salmon Gums Res.STN.Record high maximum temperature30.5 C (86.9 F)2.9 C (5.2 F)6035 of 100 (Notable)
2023-08-26Carnarvon AirportRecord high maximum temperature32.4 C (90.3 F)1.7 C (3.1 F)6432 of 100 (Routine)
2023-08-26Meekatharra AirportRecord high maximum temperature31.6 C (88.9 F)0.5 C (0.9 F)6026 of 100 (Routine)
2023-08-27MullewaRecord high maximum temperature30.8 C (87.4 F)1.3 C (2.3 F)7334 of 100 (Routine)
2023-08-30Carnarvon AirportRecord high maximum temperature32.9 C (91.2 F)1.7 C (3.1 F)6432 of 100 (Routine)
2023-08-30Badgingarra Research STNRecord high maximum temperature26.4 C (79.5 F)3.3 C (5.9 F)5032 of 100 (Routine)
2023-08-31Cape LeeuwinRecord high maximum temperature24.2 C (75.6 F)3.1 C (5.6 F)7749 of 100 (Notable)
2023-08-31PembertonRecord high maximum temperature24.5 C (76.1 F)3.9 C (7.0 F)6440 of 100 (Notable)
2023-08-31DwellingupRecord high maximum temperature26.9 C (80.4 F)6.1 C (11.0 F)1234 of 100 (Routine)
2023-08-31Rottnest IslandRecord high maximum temperature28.3 C (82.9 F)3.0 C (5.4 F)831 of 100 (Routine)
2023-08-31NorthamRecord high maximum temperature29.7 C (85.5 F)1.4 C (2.5 F)1730 of 100 (Routine)
2023-08-31CorriginRecord high maximum temperature27.5 C (81.5 F)1.3 C (2.3 F)6029 of 100 (Routine)
2023-08-31BeverleyRecord high maximum temperature28.8 C (83.8 F)1.4 C (2.5 F)2928 of 100 (Routine)
2023-08-31NarroginRecord high maximum temperature24.7 C (76.5 F)0.8 C (1.4 F)5028 of 100 (Routine)
2023-08-31Wongan HillsRecord high maximum temperature32.4 C (90.3 F)2.2 C (4.0 F)1727 of 100 (Routine)
2023-08-31BrooktonRecord high maximum temperature25.1 C (77.2 F)1.6 C (2.9 F)5026 of 100 (Routine)
2023-09-01EsperanceRecord high maximum temperature30.8 C (87.4 F)5.2 C (9.4 F)3328 of 100 (Routine)
2023-09-01Kalgoorlie-Boulder AirportRecord high maximum temperature31.1 C (88.0 F)0.7 C (1.3 F)6027 of 100 (Routine)

The daily ledgers keep a limited number of records per day, so this list has 20 of the 117 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.