Leeward Oahu VA Clinic is an urgent care center and medical clinic located at 91-2135 Fort Weaver Rd in Ewa Beach,HI. They are open today from 7:30AM to 4:00PM, helping you get immediate care. While . Leeward Oahu VA Clinic is a walk-in clinic that is open late and after hours, patients can also conveniently book online using Solv.. They also offer labs and tests on-site..