YOU SAID:

I am excited about going to the water to swim

INTO JAPANESE

水に泳ぎに行くのが楽しみです

BACK INTO ENGLISH

I look forward to going swimming in the water

INTO JAPANESE

水遊びに行くのが楽しみです

BACK INTO ENGLISH

I'm looking forward to going swimming

INTO JAPANESE

泳ぎに行くのが楽しみです

BACK INTO ENGLISH

I'm looking forward to going swimming