Look, it is impossible for you

the Only solution you got

step1:
bring 1 kilo of salt

step2:
fill your bathtub

step3:
put the salt inside the bathtub

step4:
bring a heater

step5:
put your sun glasses

step6:
get inside the bathtub

step7 :
Close your eyes and imagine that it is the beach

we recommend the following to bring the reality to your enjoyment :
1-put some see fish 2 to 5 in the bathtub
2-get a poster of a beach and put it in front of you
3- bring some sands and fill the bathroom .
4-try to get some real sound of people playing in the beach "you can get for free from the internet"

Have fun ;)