The best time to visit Lostwithiel is during the late spring and summer months, from May to September, when the weather is generally mildest and most enjoyable for exploring.May and June offer pleasant temperatures, fewer crowds, and the Cornish countryside is often at its most verdant, making it ideal for walking and outdoor activities. You'll find local gardens in full bloom, and the longer daylight hours allow for extended exploration of the Fowey River and surrounding areas. For couples seeking a relaxed getaway without the peak season hustle, these months are perfect.July and August are the warmest months and are best for families. This is when Lostwithiel truly comes alive with local events and festivals, such as the Lostwithiel Carnival and the Lostwithiel Country Fair, offering entertainment for all ages. The river is superb for kayaking or paddleboarding, and it's a great base for visiting nearby beaches. While it's the busiest time, the town retains its friendly feel, and there's a real buzz about the place.September offers a lovely compromise, with the summer crowds starting to thin but the weather often remaining agreeable. The sea is still warm enough for a dip, and the changing colours of the landscape make it a picturesque time for walks along the river or through the nearby woodland trails.