I am very lucky because I have thea beach close to home.

More natural sounding to say "a"

This summer, a lot of days I wasI often walkinged by the beach.

I like to stroll by the water, and play with the waves. ¶
(Or "I like strolling by the water, and playing with the waves.")

When I go alone, I seldom take a bathe, just I walk.

But when I go with my wife or with friends, then, I always take a bathbathe in the water.

"Take a bath" implies like in the bathroom, you're cleaning yourself. You could say bathing in the water :)

Usually, I don't stay very time taklong ing the sun, one or two hours is enought for me.

Strolls byWalking on the Beach

This is assuming you're at the beach and not walking around it.

I am very lucky because Ito have the beach close to my home.

I feel like this is more of a preference thing. "Lucky to have" is a common phrase.

This summer, a lot of days I wasI spent most of my time walking by the beach.

I like stroll by the water, and playing with the waves.

When I go alone, seldomI rarely take a bath,. I just I walk.

Does "take a bath" mean to go into the ocean?

But when I go with my wife or withmy friends, then,I always take a bath.

Usually, I don't stay very time taking the sun, opend a lot of time sunbathing. One or two hours is enought for me.

Run-on sentence. Also, I think "taking the sun" means "sunbathing" here (as in, lying down to enjoy the sun's rays)?

This summer, a lot of days I was walking by the beachI walked along the beach a lot this summer.

I like to stroll by the water, and playing with the waves.

When I go alone, I seldom take a bath,get in the water. I just I walk.

"Take a bath" is only used when getting in the water to clean yourself. If it is just for fun like when you are at the beach, "get in the water" is the correct way to say it.

But when I go with my wife or with friends, then, I always take a bathget in the water.

Usually, I don't stay very time taking the sun, o very long. One or two hours is enought for me.

This summer, a lot of days I wasere were many days this summer that I went walking byalong the beach.

I like to (go for/take) a stroll by the water, and playing with the waves.

When I go alone, seldom take a bath,I seldom get in the water when I go alone. I just I walk.

But I always get in when I go with my wife or with friends, then, always take a bath.

Usually, I don't stay out very time taklong ing the sun, one or two hours is enought for me.