Swimming

There are ostomy swimsuits with pockets into which you may put your bag. Or you can wear a pair of shorts over your swimsuit. Some people wear special tape over their barrier to ensure that everything will stick well while in water or while sweating -  A company named Brava makes them. It's been noted that cold water actually helps the existing barrier to stick to the skin better so you won't necessarily have to change your appliance after you get out of the water, but you can if it would make you feel more confident. As far as I know, you can stay in the water as long as you'd like, no harm to the stoma. Enjoy!

I had a stoma for 15 years and went often went swimming both at home and abroad. I generally used a 2 piece appliance and would use the smallest beg possible for swimming and then just change to a larger bag after but did not have to change the base plate - you can obviously get small 1 piece systems as well. The smaller bag is more discreet. 

I am not sure if you are male or female. I am female and had as per the previous post a pair of swim briefs with internal pocket but would also look for swimsuits with crunching/ gathering (loads around at the moment), I never wore a t-shirt. I am in the UK and would often swimwear from an online / brochure co. called Lands End, they have tanking tops that are long line and adjustable and high waist briefs, also excellent quality but a bit pricey.

On another note when going abroad especially to somewhere hot take at the very least double normal supplies as heat reduces wearing time as did swimming pools in my experience. At the first sign of skin irritation use bottled water for cleaning/ changing and always carry good amount of supplies in hand luggage.

And for obvious reasons do not drink anything fizzy when flying!!!

Oh and  I almost forgot have a wonderful time and swim loads !!!!