Tilapia over-wintering has been noted here for several pond owner/managers in south TX. As a general barometer the closer you are to I-10 or south of it the greater the chances of tilapia over-wintering. If you are close to or north of I-20 the chances diminish greatly (possible in the right lake/pond but unlikely in a large majority). Same can be said for LA , MS , AL, GA and FL.