The best time to visit York Harbor, Maine is during the summer months, from June to August, when the weather is warm and all attractions are open.During this period, you can expect average temperatures in the 70s Fahrenheit, which is ideal for enjoying the beaches like Long Sands Beach and Short Sands Beach, and for exploring the scenic coastal paths. The ocean temperatures are also at their warmest, making swimming and water activities more pleasant. This is an excellent time for families to visit, as many resorts and local businesses cater to summer vacationers with activities and events.Early autumn, particularly September, also offers a pleasant experience for couples. The crowds begin to thin out, the weather remains agreeable, and the fall foliage starts to appear, adding a picturesque quality to the coastal scenery.