Heat Risk in Tumbi Umbi, NSW: 2026 Assessment

Tumbi Umbi in New South Wales faces elevated extreme heat risk. The Bureau of Meteorology (BOM) reports that Australia's average temperature has increased by approximately 1.5 °C since 1910, with the frequency of extreme heat days rising across most regions.

The urban heat island (UHI) effect can make built-up areas of Tumbi Umbi warmer than surrounding rural areas, particularly on summer nights. Dark roof materials, limited tree canopy cover, and heat-absorbing surfaces contribute to localised heat stress that varies by property.

Average maximum temperatures in January are increasing, leading to more frequent heat stress events. Vulnerable populations should take precautions during heatwaves, such as staying hydrated and seeking air-conditioned environments.

Get an address-level heat risk assessment from ClimateNest for Tumbi Umbi including cooling cost estimates, heatwave vulnerability scoring, and adaptation recommendations tailored to your property.

Tumbi Umbi (postcode 2261) is tracked in ClimateNest's suburb hazard model, which maps the share of the suburb's land exposed to each hazard at high and moderate levels. The suburb's highest high-risk exposures are bushfire (17.3% of land in high-risk zones), surface flood (10.2% of land in high-risk zones), extreme wind (4.4% of land in high-risk zones). Exposure is not uniform across Tumbi Umbi — individual properties can sit well above or below these averages, so an address-level check is recommended before buying, selling or insuring.