The best time to go to Rustington is during the summer months, from June to August, when the weather is warmest and most conducive to enjoying the coastal environment.During these months, you'll find average temperatures ranging from 18°C to 22°C (64°F to 72°F), with longer daylight hours. This period is ideal for those looking to spend time outdoors, whether it's walking along the Rustington seafront, visiting nearby beaches like Littlehampton, or exploring the South Downs National Park. Families often find this time superb for coastal holidays, as the warmer water temperatures are suitable for swimming and seaside activities.Should you prefer a quieter experience with fewer crowds, the shoulder seasons of May and September also offer pleasant conditions. Temperatures are milder, typically between 15°C and 19°C (59°F to 66°F), and the countryside remains inviting.