There was a time when women wear hijab can swim among the people like everyone else. Although there are some places with beaches purpously for women wearing hijabs where they can swim and enjoy just among women and sherriat surounding.Those places you can find in Turkey, Croatia-Ulcinj, Montenegro, which has beaces just for women.
But now you can find these costumes and enjoy without limits. They look great on you, in the pool, the beach, wherever you want.
Most of them have SPF 50+. There are also different styles, colors and sizes available on the market. They are easy to carry, very confortable and dry very quickly.