I'm in New Jersey so we have the same hot humid summers as Manhattan. I'm not concerned with taking the pump off to swim. I can put it in a cooler to keep it out of the sun.
I'm more concerned with being out in the sun while wearing the pump. I may not have a shaded area (I don't sunburn and have no need for being in the shade to protect my skin) and the ambient air temperature will be over 98ºF (closer to 102ºF). What do I do when I am sitting poolside or on a beach towel chatting with my wife? What do I do when I am working out in the garden?
One father of a 14 year old girl told me he reduces her basal during the summer to compensate. But a 14 year old hormonal teenage girl and an over 40 year old man aren't the same and he's not sure how much I should just. Trial and error?
This is my first insulin pump and I keep running into situations that I struggle to find answers to.