Marrero, Louisiana, located in Jefferson Parish, offers a diverse climate, hydrology constituents, and a range of outdoor recreation opportunities. The region experiences a humid subtropical climate, characterized by hot and humid summers, mild winters, and abundant rainfall throughout the year. Summers in Marrero are often hot, with temperatures averaging around 90°F (32°C), while winter temperatures range from 50°F to 70°F (10°C to 21°C).

The hydrology of Marrero is heavily influenced by its proximity to the Mississippi River and its tributaries. The area boasts a vibrant ecosystem with marshlands, swamps, and bayous. This provides opportunities for boating, fishing, and birdwatching. The Barataria Preserve, part of the Jean Lafitte National Historical Park and Preserve, is a notable outdoor recreation area near Marrero, offering scenic hiking trails, boardwalks, and canoeing/kayaking routes through the wetlands.

Outdoor enthusiasts can also enjoy hiking and camping at Lafreniere Park, the largest park in Jefferson Parish, which features scenic trails, picnic areas, and a lake for fishing and boating. Additionally, Marrero is conveniently located near the Gulf of Mexico, providing easy access to beautiful beaches, water sports, and deep-sea fishing. Overall, Marrero offers a favorable climate, diverse hydrology constituents, and a variety of outdoor recreation opportunities for residents and visitors to enjoy.