Rethinking artificial lawns: The impact on Adelaide urban heat

Adelaide has been experiencing a stretch of extreme temperatures, and as heatwaves become more frequent, the way we design and maintain urban spaces has never been more critical.

While artificial turf is often chosen for its lush appearance and low maintenance, recent studies have shown it can reach temperatures of 80°C, making it one of the hottest surfaces in urban environments.

In a recent radio interview, Stefan Caddy-Retalic (Waite Arboretum & Resilient South) discussed the findings of urban heat island research and the unexpected role artificial turf plays in exacerbating extreme heat.

The Problem with Artificial Turf

Despite its visual appeal, artificial turf:

• Absorbs and radiates extreme heat, making surrounding environments significantly warmer.
• Increases energy consumption, as hotter outdoor spaces lead to greater reliance on air conditioning.
• Contributes to long-term urban heat retention, particularly in high-density developments with fewer trees and limited green spaces.
• Has limited recyclability, with most artificial turf products ultimately ending up in landfills.

Research mapping urban heat islands across Adelaide has found that suburbs with large areas of artificial surfaces—such as bitumen, concrete, and artificial turf—experience higher temperatures, particularly in the evening when these materials continue to radiate stored heat.

Addressing the Issue

To mitigate urban heat, city planners and policymakers are considering restrictions on artificial turf, particularly in public spaces and sporting facilities. Studies indicate that areas with greater tree coverage and natural green spaces remain cooler and offer essential relief during heatwaves.

Potential solutions include:

• Expanding tree canopy cover and prioritising green infrastructure in urban design.
• Implementing light-coloured, reflective materials for roads and rooftops to minimise heat absorption.
• Introducing incentives for sustainable landscaping that favour natural vegetation over synthetic alternatives.

As Adelaide continues to experience hotter summers, it is crucial to reassess urban planning strategies to prioritise climate resilience and sustainable development. Should councils regulate the use of artificial turf in new developments? What urban cooling strategies should be prioritised?