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Physical Features of St. Joseph Bay Aquatic Preserve Quick Topics
  • St. Joseph Bay is a large body of water enclosed by St. Joseph Peninsula.
     
  • The St. Joseph Peninsula is 17 miles long and has an average width of 1,000 feet. It is formed from the Cape San Blas shoals and the historical migration of the Apalachicola River.
     
  • The cape and the spit sediments are quartz sands originally supplied by the Apalachicola River. Waves and other shore zone processes have put the beaches in a constant state of change over the last hundred years.
     
  • Cape San Blas is one of the most critically eroding shorelines in Florida.
     
  • St. Joseph Bay is not significantly influenced by freshwater inflows, therefore, the salinity is 35 ppt - essentially the same as the Gulf.
     
  • The surface area of the bay is approximately 43,872 acres. The bay's deepest parts are 35 feet near the point, and the southern end averages 3 feet.
     
  • The preserve is a part of the Apalachicola-Chattahoochee-Flint watershed.
White sand dunes

White sand beaches of St. Joseph Bay

 

Last updated: April 06, 2015

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