The red tide on the guld starts from the Caloosahatchee river coming from the Everglades in the Ft Myers area. Agriculture fertilizer runoff overflows bad into the river from Lake Oceechobee during excessive rainy seasons like we have had the last 4 months. The red tide then flows out into the Gulf and follows currents and winds usually more west and south but often northerly also as this year has. I would expect most to be gone in the Tampa area by late sept unless a hurricane with drenching rains brings more overflow from Oceechobee. The southwest Fl counties will probably have issues thru dec. I own a waterfront concrete seawalled canal lot in Englewood which is only a 30 minute boat ride just north of Ft Myers & Sanibel.