The best time to visit Friday Harbor is during the summer months, from June to September, when the weather is at its finest and all local attractions are fully operational.During this period, the days are long, sunny, and warm, with average temperatures in the 70s Fahrenheit. This weather is ideal for enjoying outdoor activities like whale watching, kayaking, and exploring the island's natural beauty. Many local businesses, including seasonal restaurants and shops, are open seven days a week, providing a complete visitor experience.Couples often find late spring (May) or early fall (October) appealing as well. While the weather might be cooler, these shoulder seasons offer a more tranquil visit with fewer crowds, allowing for a more intimate experience of the island's charm and natural scenery.