Waters around northern tropical Australia were by far the hottest on record for January 2025. Data from 1900-2025 from ERSSTv5. Typically northern Australian water temperatures peak in late summer
http://www.bom.gov.au/cgi-bin/climate/change/timeseries.cgi?graph=sst&area=trop&season=01&ave_yr=0&ave_period=6190
http://www.bom.gov.au/cgi-bin/climate/change/timeseries.cgi?graph=sst&area=trop&season=01&ave_yr=0&ave_period=6190
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Data from 1900-2025 from ERSSTv5
http://www.bom.gov.au/cgi-bin/climate/change/timeseries.cgi?graph=sst&area=aus&season=01&ave_yr=0&ave_period=6190
https://oceanportal.spc.int/portal/app.html#climate