Just my 2 cents ( Iconn4 has lived there , I have not
)
I have fished the keys for tarpon many times since the mid 80's. March can be too early , April or May is best IMHO,
I have not been in June and July but was told they are good months if you can stand the heat.
I am not the expert. The Captain I used many times in Key West discouraged me from booking a trip in October ,
telling me having fished in the spring for so long , I would be disappointed in October fishing ( plus weather can
be a [censored] shoot. )
Good luck , If you go , Please post a report
MO