Fighting the heat
We have the same boat, and the same problem, although we're in N.C. We bought the smallest Carrier room AC (I think it was 5000 btus) and it cost about $150. It fits perfectly in the companionway and with a little creative installation of the drop boards the whole thing keeps it cool enough for sleeping. Of course this is only good if you have shore power available. When we were anchored out we counted on ventilation from the forward hatch, some fans and good bug screens.