Sentinel, Oklahoma, is a small town located in Washita County in the southern part of the state. The climate in Sentinel is characterized as a humid subtropical climate with hot summers and mild winters. Summers are typically hot and humid, with temperatures often reaching the high 90s, while winters are relatively mild with temperatures averaging in the 40s and 50s.

The hydrology constituents in Sentinel are primarily influenced by the nearby Washita River. The river provides a source of water for the community and supports various aquatic life. Additionally, there are several smaller creeks and ponds in the area that contribute to the local hydrology.

Sentinel offers numerous outdoor recreation opportunities for residents and visitors. The town is surrounded by beautiful natural landscapes, including rolling hills and expansive farmland, providing ample opportunities for hiking, bird-watching, and wildlife observation. The Washita National Wildlife Refuge, located just a short drive away, offers additional recreational activities such as fishing, boating, and hunting. The refuge is home to diverse wildlife species, including waterfowl, deer, and numerous migratory birds, making it a popular destination for nature enthusiasts. Overall, Sentinel offers a welcoming environment for outdoor enthusiasts to enjoy the beautiful surroundings and engage in various recreational activities.