The temperature difference between morning and evening is large. It is generally not recommended to wear skirts. The sea breeze is cold and humid. It is definitely not possible to go to the sea. It is cold to wash your feet.
It is very cold here in the morning and evening, so it is suitable to wear jeans, half sleeves and a jacket. The water must be very cold, don't even think about going into the water
Don't even think about going to sea. The seaside is cold, and it is impossible to get into the water before July. Wading is ok. Whether you can wear a skirt depends entirely on the weather. Sunny day, around noon.