Spring is good for the woodland flowers and autumn brings stronger colour; on clear days the lake and surrounding fells add the wider view. Go early or late in the day for quieter paths and softer light on the stonework. Allow about 1–2 hours for the castle exterior, grounds and shore, longer if you take a walk or arrive by boat.
The castle's interior has had changing access during restoration, so treat the house as a bonus and plan around the grounds, lake and exterior. Level access reaches the outside of the castle and café, with Blue Badge parking and an accessible toilet near the café; some wider estate paths include stiles and uneven or boggy sections. Bring footwear for wet grass and a layer for Windermere's exposed shore.