Hydroplaning occurs when a vehicle's tires lose contact with the road due to excess water. The speed at which you can hydroplane depends on various factors, including:
• Vehicle weight – Heavier vehicles are less likely to hydroplane because of increased tire traction.
• Tire tread and pressure – Tires with deeper grooves have better grip in wet conditions than shallow ones. Properly inflated tires also help prevent hydroplaning.
• Road surface - Smooth surfaces are more prone to causing hydroplaning than rough roads.
• Water depth - Hydroplaning is more likely in deep standing water as opposed to light rain or mist.
Generally speaking, if your car’s tires are properly maintained and you drive below 55 mph in rainy conditions, you should be safe from hydroplaning.