I play in Thailand, Malaysia, Cambodia and Myanmar. It's hot here for 49 weeks a year (90°-100° F). The other 3 weeks, it's mildly hot.
Here's what I learned VERY QUICKLY when I started playing in Thailand.
DO NOT WEAR COTTON WHEN IT IS HOT!
I nearly passed out the first time I played golf out here in my 100% cotton polo. I lay in the shower, on the floor, eating dried mango while the cold water washed over me. That's not a joke.
In the hot, we want to wear synthetics. Not silk. Not cotton. Nope. Synthetics like nylon, polyester, and nylon/polyester with spandex woven into it. This will allow the sweat to evaporate and stop the shirt clinging to you. When cotton clings to you, it restricts movement. Synthetic shirts are simply the best golf shirts for hot weather.
But they feel cheap right?
I did not like to wear synthetics back then and I was convinced by the internet articles telling me to wear loose fitting cottons, linens and silks. WRONG!
After the 3rd or 4th round, you really appreciate the advice of people who tell you to get some dry fit golf attire.
When the wind blows, it plays cool on your skin mixing the moving air with the wet front and back of your shirt. The fabric stretches and moves if it's clinging to you instead of holding your shoulders back and wrapping around your love handles.
Shirts with spandex woven in are going to be the most comfortable shirts you'll ever wear. I know, because I created shirts specially for my own enjoyment in the heat!
Created for the tropical heat - fun patterns
I have created these shirts to be the lightest, most comfortable shirts on the planet especially for the heat.
They are spandex and synthetic blended together to create a light shirt that stretches and keeps your cool in the hot weather. The fabric retains some moisture as you play and the wind cools you down as you perspire.
After you get off the course, the shirt is dry within minutes of being indoors and the best part about this synthetic blend is that it does not hold stink under the armpits. I have been using this fabric for 2 years now and cannot be happier.
Waddaplaya is the only golf polo I wear and that's because I made it the best possible golf shirt for hot weather in the world.
Three Sixty Six Golf Shirt
Great stretchy blend - tons of colors
ThNothing to complain about here. Great shirts for hot weather with 88% polyester and 12% elastene which is also a SUPERB stretchy thread woven into the shirt to make it breath and stretch to your body and keep you cool playa.
Short and long sleeve available
Long sleeve is sometimes an option to if you want to keep the sun off your arms. Have a look at the bottom of the page if you want to see my solution which I use often out here in Thailand. UV sleeves.
This spandex/nylon blend will be a perfect feeling for you on the course and if you're worried about the cancers on the forearms or just don't like too much sun, the long sleeves are a great option.
Cool patterns and perfect spandex mix
Lovely blend of 85/15 with the poly and spandex. These patterns are not as loud and bright as the Waddaplaya Golf shirts mentioned above but are definitely more interesting than plain golf shirts.
The best golf shirts or polos for heat and hot weather are always synthetic.
I promise you're going to be thanking me when you try the blended shirts especially the little tidbit about the spandex for stretchiness. You're going to love it and golf in the heat will mean nothing to you, big dog!