The watery fun and games took place in the home’s garden where there was also a bubble machine and paddling pools.
Flavoured water and ice pops were served to residents and visitors as part of the celebrations.
Ann Mielnik, home manager at The Oaks said: “Who says water fights are just for kids?
“What a great laugh for everyone. It certainly cheered us all up. Something very simple to bring a smile and some joy to everyone.”
Resident Ann Wallace said: “It was lovely, I loved the big bubbles and of course singing “I’m forever blowing bubbles”.”
Resident Dennis Allen added: “It was great. I loved it. My sister was here and she enjoyed it too.”
World Water Week is an annual event organised by water institute SIWI to raise awareness of global water issues.