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Texas City Dike Well up inside Galveston Bay. Clean Gulf water rarely reaches here, so clarity is mostly about whether wind is stirring the shallow bay rather than which direction it blows from. Galveston Pier 21 Sits in the Galveston Channel just inside Bolivar Roads, so Gulf water arrives on the incoming but is already mixed with ship-channel traffic and bay outflow. San Luis Pass The pass drains all of West Bay through one narrow throat, so even a modest tide moves real water over the bars and drop-offs. Christmas Bay Shallow seagrass back bay behind Follets Island, reached from West Bay. Two to three feet over most of it, so wind speed muddies it far faster than wind direction cleans it. Freeport Jetties Deep jettied entrance with direct Gulf exchange - the biggest tide range of these spots, and green water shows here first when the wind turns onshore. East Matagorda Bay Enclosed bay behind the peninsula with no direct Gulf pass - the smallest tide range on this list by a wide margin, so wind tide moves more water here than the astronomical tide does.

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