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2025 Map of Sea Isle

Name: 2025 Topographic Map of Sea Isle
Creator: U.S. Geological Survey
Published: 2025
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2025

About this map

Galveston Island serves as the focal point of this coastal landscape, where the communities of Sea Isle and Bay Harbor occupy the narrow land between West Bay and the Gulf of Mexico. The area is defined by its complex aquatic geography, featuring protected waters like Maggies Cove and Snake Island Cove, which are separated from the mainland by the vital Intracoastal Waterway. This transit corridor bisects the marshlands and open water, connecting the commercial activity of Hitchcock to the broader Gulf system.

The mainland interior is a labyrinth of tidal bayous and points, such as Halls Bayou and Alligator Point. The settlement pattern follows the coastal curve, with residential streets in Sea Isle like Nueces Dr and Matagorda Dr illustrating the development of this barrier island. To the west, the boundary between Galveston and Brazoria Counties cuts through the marsh, marking a transition into the more open waters of Chocolate Bay.