Today it is a nice day, and I don't know if it's going to rain, but I like it when the day it is so hot ! because <em>it's possible?</em> to go to the beach. Today I'm staying in my house to read a book and in the afternoon I'm going to watch TV. I hope that tomorrow it is nice day too. Good bye.
<em>In the sentences where you wrote today or tomorrow, it isn't necessary to write it, because today and tomorrow would be the subjects of those sentences. Enjoy your day!</em>