The best time to go to Sunbury On Thames is during the late spring and summer months, from May to September, when the weather is at its most pleasant for enjoying outdoor activities.During these months, you'll find warmer temperatures and longer daylight hours, which are ideal for exploring the riverside paths, visiting local gardens, and enjoying boat trips on the Thames. The community events and local markets are also more frequent, providing a good opportunity to experience local life.For those looking to enjoy the Thames without the peak summer crowds, May and September offer a good balance of agreeable weather and a more relaxed pace.