The Lake District is a year-round destination but the crowds are real. July and August bring most visitors — the village can feel genuinely packed on summer weekends, and parking becomes a problem. If you have flexibility, late May or September offer better walking weather, manageable crowds, and often more reliable sunshine than high summer.
Winter has its own appeal: the fells are quiet, the low light on the lake is beautiful, and you can have Dove Cottage almost to yourself. The hills can hold snow from December to March, which adds drama but makes the upper paths slippery. The valley walks are passable in all but the worst conditions.
The Grasmere Sports (a traditional Lakeland games day with fell racing, hound trailing and wrestling) takes place on the last Thursday of August and draws a large local crowd. The Rushbearing Festival at St Oswald's Church is held in late July and features a procession with armfuls of rushes strewn on the church floor, continuing a medieval tradition.