Daytime sea

Today I went at sea. Here it is not beautiful but better than nothing.  I was there with my gilrfriend, her brother and my friends. We have played rackets [volleyball?] along the shore and we swam. It was a funny day, with a good mood and much sun - maybe a little too much.  But if you want to know, I prefer the montains. The mountains in summer have a special charm.

[Good work, but you need to remember your capitalization.  Also, end sentences with a single period, not ellipses (...)]

daiytime sea

today I went at sea to the beach...here it is not beautiful but it's better than nothing...we were me, my gilrfriend, her brother, and my friends...we have played rackets (what is rackets?) along to the shore and we have did some swimming...funny fun day, good mood, and many lots of sun, maybe a little too much...but if in case you wanted to know, I prefer the mountains....the mountains in during the summer have a special charm....

I sent the first correction too early...my apologies!

daiytime (daytime) sea

today I went at sea (to sea, to the beach?)...here it is not beautiful but better than nothing (it's not beautiful here, but it's better than nothing...we were (you can also say "it was") me, my gilrfriend (girlfriend), her brother and my friends...we have played rackets (tennis? badminton?) along to (the) shore and we have did went swimming...funny day, good mood, and many lots of sun,maybe a little too much...but if you want to know, I prefer the montains (mountains)....the montains in summer have a special charm....

daiytime sea

today I went at sea (to sea, to the beach?)...here it is not beautiful but better than nothing (It's not beautiful here, but it's better than nothing...we were (you can also say "it was") me, my gilrfriend (girlfriend),her brother and my friends...we have played rackets (tennis? badminton?) along to (the) shore, and we have did went swimming...funny (fun) day, good mood(s), and many sun (lots of sun),maybe a little too much...but if you want to know,I prefer the montains....the montains in summer have a special charm....