Welsh, Louisiana is a small town located in Jefferson Davis Parish in the southwestern part of the state. The climate in Welsh is classified as humid subtropical, characterized by hot and humid summers and mild winters. Average temperatures range from the mid-90s Fahrenheit in summer to the mid-50s in winter.

The hydrology constituents of Welsh are influenced by the nearby Bayou Nezpique, which flows through the town. Bayou Nezpique is part of the larger Mermentau River Basin, known for its diverse aquatic wildlife and recreational opportunities. The area is also surrounded by numerous lakes and rivers, providing residents and visitors with opportunities for fishing, boating, and water sports.

In addition to water-based activities, Welsh offers various outdoor recreation opportunities. The town is home to several parks and green spaces, providing ample space for picnicking, walking, and enjoying nature. Nearby attractions include Chicot State Park and Lake Arthur, which offer hiking trails, camping facilities, and opportunities for birdwatching and wildlife observation.

Overall, Welsh, Louisiana provides a pleasant climate, access to water-based activities through its hydrology constituents, and a range of outdoor recreational opportunities for residents and visitors to enjoy.