The following web page is a tide and current predictor for the entire US.
Just click on the geographic area in which you wish to find a tide, and the
tides are posted for you.
 
http://www.naplesfla.com/category/weather/ftides.htm
 
Another tide page, one that has a closer tide table for Sanibel than the
above, offers tide tables or tides in graph form. The geographic range of
tide tables or graphs offered on this page run from Cape Sable Florida US;
to Sanibel Island, Florida US.
 
http://www.naplesnews.com/weather/tides/
 
Elizabeth