key west to isla mujeres
If you''ve never been to the Dry Tortugas it is a nice place to visit. If you have a good window, just go. Going West, you have the current against you all the way, so you do not want to have the wind against the current (the Stream will kick up pretty bad). Coming back, you have the current with you, so it''s a faster trip, but you still don''t want wind against current.