I cruised SE Asia for 3 years.
There is nothing you an do about humidity.
A fan will move air across your body, but if your sweat can't evaporate you stay hot and clammy.
There are a few things that you can do to cool down the cabin little.
The first , as suggested is a reflective tarp cover.
This will stop the direct suns rays from heating up as much of the horizontal surfaces as possible.
No matter how well the deck is insulated it will adsorb heat and even as the evening cools down, emit that heat into the cabin.
You can use a small positive displacement pump to supply a hose system the dribbles water over the cabin top and decksides ( and even the tarp).
Even in high humidity this will evaporate away, taking some of the stored heat from the cabintop an give you a cooler evening.
Lastly, cool showers. Called a "mandi" in Indonesia.
All you need is a bucket in the cockpit and a ladle.
Traditional boats laird hessian bags all over the decks and kept them wet. Not sure how well that worked though. It still felt stifling below.
gary
There is nothing you an do about humidity.
A fan will move air across your body, but if your sweat can't evaporate you stay hot and clammy.
There are a few things that you can do to cool down the cabin little.
The first , as suggested is a reflective tarp cover.
This will stop the direct suns rays from heating up as much of the horizontal surfaces as possible.
No matter how well the deck is insulated it will adsorb heat and even as the evening cools down, emit that heat into the cabin.
You can use a small positive displacement pump to supply a hose system the dribbles water over the cabin top and decksides ( and even the tarp).
Even in high humidity this will evaporate away, taking some of the stored heat from the cabintop an give you a cooler evening.
Lastly, cool showers. Called a "mandi" in Indonesia.
All you need is a bucket in the cockpit and a ladle.
Traditional boats laird hessian bags all over the decks and kept them wet. Not sure how well that worked though. It still felt stifling below.
gary