I went to the seaside three months ago. I was there with my family. We got there by car. (tak lepiej brzmi wg mnie, nie ma tylu powtórzeń) The weather was changeable. Once sun was shining and another time it was raining. (to samo co wyżej, ja bym to tak napisała ale Twój wybór, poza tym jak piszesz o pogodzie to pisz o pogodzie a nie o hotelach, inaczej to opowiadanie robi się chaotyczne;-p) We stayed in hotel. I’ve spent my time walking on the beach. We’ve visited castles and Baltic Museum. I’ve swum in the sea a lot. Evenings we’ve had suppers (kolacja to chyba lepsze określenie na wieczorny posiłek;p). I’ve bought a lot of souvenirs. It was great!