Renting a bouncy castle typically requires some advance planning, but the exact timeframe may vary depending on several factors:

1 Demand: During peak seasons, such as holidays, weekends, or school vacations, bouncy castle rental companies may experience high demand. In such cases, it's advisable to book well in advance to ensure availability.

2 Availability: The availability of bouncy castles may vary based on the rental company's inventory and the popularity of the specific type or size of the inflatable. If you have a specific bouncy castle in mind, booking early can increase the likelihood of securing your desired option.

3 Event Type: The type of event you are hosting may also influence how far in advance you need to book. For large events like community fairs, corporate parties, or school events, planning ahead is essential to secure the necessary equipment.

4 Company Policies: Different rental companies may have different policies regarding advance bookings. Some companies may require a minimum notice period for reservations, while others may be more flexible.

As a general guideline, booking a bouncy castle rental at least a few weeks in advance is recommended, especially for popular dates or busy seasons. However, if you are planning a last-minute event, it's still worth reaching out to rental companies to check for availability. They may have openings due to cancellations or other scheduling changes.

When contacting a bouncy castle rental company, be prepared to provide them with the date, time, location, and duration of your event to get an accurate quote and check availability. Additionally, ask about their cancellation policies, deposit requirements, and any other terms and conditions that may apply to the rental.