Marietta, Texas is a small town located in Cass County, northeast Texas. The town experiences a humid subtropical climate, characterized by hot summers and mild winters. Summers are typically hot and humid, with temperatures ranging from the mid-80s to low 100s Fahrenheit. Winters are mild, with temperatures averaging in the 40s to 60s Fahrenheit. Marietta receives moderate rainfall throughout the year, with occasional thunderstorms.

Hydrologically, Marietta is located near several bodies of water. The town is close to the Sulphur River, which provides opportunities for fishing, boating, and kayaking. The region is also home to numerous lakes, including Lake Wright Patman and Lake O' the Pines, which offer additional water-based activities such as swimming, water skiing, and camping.

Outdoor recreation opportunities in Marietta are abundant. The town is surrounded by picturesque forests and natural areas, providing opportunities for hiking, camping, and birdwatching. Hunting is also popular in the area, with various game species such as deer, turkey, and waterfowl. Marietta State Park, located nearby, offers hiking trails, picnic areas, and opportunities for nature observation.

Overall, Marietta, Texas offers a favorable climate for outdoor enthusiasts, with a variety of hydrological features and recreational activities to enjoy.