I agree with many...as I get older, the heat is unbearable for me...I won't even take my kids to the beach during "prime time"...we usually go early in the morning or late afternoon, early evening...less crowded (I dislike crowds...I need my space

...especially from tourists!!!) and the boys can still swim while I detect.
They swim with the direction I am moving in and I always face the ocean. My back is NEVER to my kids (which means, I am walking backwards detecting up and down - water to dunes - which I do like better).
And I prefer to detect after a good rain, makes this clay soil we have much better to dig in, well, better if we didn't have rain

.
And I don't mind walking in the rain, when it's misty or just sprinkles...but I prefer not to detect in the rain...rain is made for walking in with your lover, hand in hand!!!
But with the storms we have had lately...you won't see me out there with all that lighting...a few bad experiences as a kid with that stuff, enough to scare the dickens out of me and I'm not afraid to say that at age 51, I am terrified of lighting!!!!!!!!!
I also tried detecting in the heat of the day, and had to head to my car and get the a/c going....dizzy, clamy....sick to my stomach...I was approaching that HEAT STROKE stage and did not like that feeling...so I learned, a few clad coins and costume jewelry is not worth it to me...I do it cause I enjoy it, it's great exercise, I've lost weight (29 pounds since January!!!) and I love finding things....so it's a hobby for me, not something I dwell on and say, "I must get out and detect"...I have so many hobbies, haven't completed one of them yet!!! (Cross-stitching, genealogy, started coin collecting, metal detecting, camping, boy and cub scouting and then I had to go back to work cause I wanted more interaction with adults!!!)...
So, for whatever reason you do this, for whatever reason you come up with for not going out and detect,....well, so be it....where one may detect 7 days a week and come home with a few clad coins, foil, pull tabs, etc....that one day you go out and come home with a 14K gold ring!!!!!!!!!!
Happy Hunting all and be safe out in this heat...really feels good today...it's only 75 right now at 5:16 pm and we will be heading out soon to the beach (if hubby ever gets done working on this new truck he bought....MEN and their toys...geez!!)
LOL.......Annmarie
PS: Kudos to that man with the oxygen going out detecting....I wish him many more safe hunting days to fullfill his days....people like that give you inspiration that anything is possible if you put your mind to it!!!