Check out the outdoor terrace in Terminal A, it’s called “Sports bar” but you can get a coffee and watch the planes loading in/out.
Use the train/tram system of the city to make your way to Zurich HB, from there you can walk to Lake Zurich. During the summer time, there are various “pools” along the lake you can visit and swim. On a warm, 28/29/30 kinda day, that’ll hit the spot.
Lemon & Mint was 25 CHF in Aug-2022