Monday 1 June 2026 - Seasonal Climate Summary for Remote Islands and Antarctica - Product code IDCKGC2RR0

Remote Islands and Antarctica in autumn 2026

Jump to a map of the areas covered in this summary

Australia's Indian Ocean islands

  • Autumn rainfall at Christmas Island Aero was close to average, the total rainfall was 754.2 mm compared to the autumn average of 722.7 mm.
  • At Christmas Island Aero, the mean maximum and mean minimum temperatures were 0.3 °C and 0.4 °C warmer than the autumn average, respectively.
  • The autumn rainfall total at Cocos Island Airport was wetter than average, the total rainfall was 940.4 mm compared to the autumn average of 670.2 mm.
  • Both the mean maximum and mean minimum temperatures were above average at Cocos Island Airport at 0.8 °C and 0.4 °C, respectively.

Australia's Pacific Ocean islands

  • Autumn rainfall at Norfolk Island was below average, with a rainfall total of 333.8 mm, compared to the autumn average of 356.8 mm.
  • At Norfolk Island Aero, the mean maximum temperature was 0.8 °C and the mean minimum temperature was 1.3 °C above average.
  • Lord Howe Island Aero recorded a total autumn rainfall of 392.0 mm, this was just below the autumn average rainfall for the station at 422.8 mm.
  • At Lord Howe Island Aero, the mean maximum temperature was 0.6 °C above average and the mean minimum temperature was 0.9 °C above average.

Australia's Antarctic and sub-Antarctic territories

  • The strongest wind gust recorded during autumn was 189 km/h at Mawson on the evening of 28 March.
  • The mean maximum and mean minimum temperatures for autumn were greater than 1.0 °C above average at all Australian Antarctic stations, except for the mean minimum temperature at Mawson recording 0.8 °C above average.
  • Autumn precipitation at Macquarie Island was above average, the station recorded 315.1 mm of rainfall, compared to the average for autumn at 285.7 mm.
  • At Macquarie Island, both the mean maximum and mean minimum temperatures were 0.8 °C and 1.1 °C above average.
  • The strongest wind gust recorded this autumn at Macquarie Island was 120 km/h on the morning of 22 May.

Extremes Records Summaries Important notes the top

Extremes Records Summaries Important notes the top

Summary statistics for autumn 2026
Maximum temperatures
(°C)		 Minimum temperatures
(°C)		 Rainfall
(millimetres)
Mean for
Autumn
2026		 Diff
from
average		 Highest for
Autumn
2026		 Mean for
Autumn
2026		 Diff
from
average		 Lowest for
Autumn
2026		 Total for
Autumn
2026		 Average
for
Autumn		 Rank of
Autumn
2026		 Fraction of
Autumn
average
Offshore Islands
Lord Howe Island Aero 23.9 +0.6 27.2 6 Mar 2026 19.2 +0.9 13.4 7 Apr 2026 392.0 422.8 average 93%
Norfolk Island Aero 23.5 +0.8 26.3 8 Mar 2026 19.1 +1.3 15.7 23 Apr 2026 333.8 356.8 average 94%
Christmas Island Aero 28.5 +0.3 30.3 29 Mar 2026 23.9 +0.4 20.2 31 May 2026 754.2 722.7 average 104%
Cocos Island Airport 30.6 +0.8 32.5 17 Apr 2026 25.7 +0.4 23.2 27 Mar 2026 940.4 670.2 high 140%
Antarctica and Macquarie Island
Casey -6.4 +1.2 4.3 1 Mar 2026 -13.2 +1.2 -29.6 21 May 2026 68.6 64.8 average 106%
Davis -8.6 +1.0 1.0 10 Apr 2026 -14.4 +1.0 -28.7 28 May 2026 40.8 28.6 high 143%
Macquarie Island 7.8 +0.8 10.5 26 Mar 2026 4.8 +1.1 -3.0 10 May 2026 315.1 285.7 average 110%
Mawson -9.6 +1.2 -0.8 10 Apr 2026 -15.9 +0.8 -28.0 31 May 2026

Extremes Records Summaries Important notes the top

Map of the areas covered by this summary

Notes

The Seasonal climate summary, usually published in the first week of the following month, lists the main features of the weather in Remote Islands and Antarctica using the most timely and accurate information available on the date of publication; it will generally not be updated.

This statement has been prepared based on information available on Monday 1 June 2026. Some checks have been made on the data, but it is possible that results will change as new information becomes available.

In some situations, some or all of the rainfall is in the form of hail or snow. In these cases, the totals given are for the water equivalent: the depth of liquid water that results from melting any frozen precipitation. There can be significant 'undercatch' of snow in strong winds, meaning the true precipitation can be higher than that reported.

Averages for individual sites are long-term means based on observations from all available years of record, excluding the current year. The length of record can vary widely from site to site. Averages are not shown for sites with fewer than 10 years of record, as they cannot then be calculated reliably.
The median is sometimes more representative than the mean of long-term average rain.

The Rank indicates how rainfall this time compares with the climate record for the site, based on the decile ranking (very low rainfall is in decile 1, low in decile 2 or 3, average in decile 4 to 7, high in decile 8 or 9 and very high is in decile 10).
The Fraction of average shows how much rain has fallen this time as a percentage of the long-term mean.

Where temperature area averages are mentioned, they are derived from the ACORN-SAT dataset.

Information about Australian Indigenous seasonal calendars is available at the Indigenous Weather Knowledge website.

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