Put the Sydney weekend after the study week
Harbour, museums, coastal walks and Blue Mountains work better as separate study-weekends. Fix classes, coursework and rest first; select one activity whose distance, opening status and weather fit rather than turning a weekend into a checklist.
One adaptable culture route
Combine a harbour ferry with one venue, or choose a Blue Mountains route only when official conditions allow.
Travel and return
Use Transport for NSW information for train, ferry and bus changes and check the return from any remote walk.
Weather, nature and safety
Follow UV, surf, bushfire and track warnings; lifeguard advice and official alerts override the plan.
Four checks before leaving
Confirm official opening or reservation status, real return transport, weather or sea conditions, and companions plus emergency contacts. Current operator and venue notices govern access, timing and safety.