The best time to go to Appin is during late spring and early autumn, specifically May, June, and September.
These months offer the most pleasant weather conditions for exploring the area, with milder temperatures and generally less rainfall than the peak summer months or winter. You'll find longer daylight hours, great for outdoor activities like hiking, cycling, and exploring the coast. The midges, which can be bothersome in mid-summer, are also less prevalent during these periods.
For those looking for outdoor adventures, May and June are ideal. The landscape is lush and green, and the days are long, making it great for taking on trails in Glen Coe or enjoying boat trips on Loch Linnhe. It's an excellent time for couples who enjoy active holidays, as many local attractions and activity providers will be fully operational, but without the busiest crowds of July and August.
September is also a wonderful time to visit. The autumn colours begin to emerge, creating stunning scenery, especially in the surrounding glens. The weather often remains mild, and the tourist season is winding down, meaning fewer crowds at popular spots like Castle Stalker.