We survived with no fans through a French Polynesia
summer. We were always anchored out so the boat was oriented into the breeze. We had a windscoop that doubled as a foredeck awning and a full awning aft of the mast
. We almost always had a nice breeze blowing through the boat. It was very livable even when temperatures got well into the 90s. Some late afternoon/early evenings got a bit sticky in that calm period when it shifts from ocean to land breezes. In those cases a fan in the galley and main cabin would have been nice but only for a short period of time. Nights were always cool enough for sleeping in the forepeak with the windscoop.
The key is hanging on the hook where you'll lie to the wind
. Tied up in a Marina anywhere on the East Coast
or Tropics in the summer is pure torture. You almost never align to the prevailing breezes and just swelter. Guess that's what air conditioners are for. Another important thing is an awning. Keeping the sun off the boat cuts solar
gain to zero making living in or on the boat great. Next to the self-steering vane, a good awning would be my primary needs for cruising where it's warm.
As far as electrical
outlets, you don't need many if the boat is set up properly with DC powered appliances
, chargers, etc. In the best of all possible worlds, I'd have two aft on each side in the Galley/Chart table area, two amidships, one in the head
, and one forward. I've managed to survive very well with just three outlets, two aft and one in the head, however. Almost never use the head outlet. At the marina, the aft ones get used for tools, computer, charging
the cell phone
etc. Probably could live with just an extension cord, though.
As you can tell I'm not a big user of juice, especially out cruising. Just don't need all those amp sucking appliances