Landlords generally get at least 30 days notice their property is vacating. Same with property management companies. It generally can take anywhere from 1 to 30 days after the vacancy to get the property ready to rent again and sign the tenant. A good time to start looking aggressively would be near the end of May. If you know what you want and the move-in date, I would call several property management companies to ask about anything they know about now for a July occupancy. If you are in a hot rental market, a resume with info like your rental history, occupation, salary range, time with your employer, and credit score range might help with getting the place you want.