Like all synthetic fibers, artificial grass heats up under direct sunlight. It gets warmer than real grass, but it's not dangerous, even on scorching days. Modern turf is more realistic and stays cooler than previous generations of artificial turf, unlike other yard materials like decking or asphalt, which can pose more significant heat risks. It's generally too hot to be outside in direct sunlight during peak summer heat. On such days, the extreme temperatures artificial grass reaches are unlikely to impact barefoot activities. Infill is also responsible for the increased heat retention in artificial lawns. Some types of artificial grass are better at deflecting heat.