Many tourists enjoy swimming in the ocean while on vacation without considering the potential risks. Popular holiday destinations like Spain, Turkey, and Greece have official warnings on the GOV.UK Foreign Office websites advising travelers about swimming abroad. The Foreign Office emphasizes the dangers of drowning in the sea and swimming pools annually.

Travelers with young children are urged to supervise them closely around pools and the sea, even if they are good swimmers or if a lifeguard is present. The Foreign Office warns about hazards such as strong undercurrents, hidden rocks, and shallow waters, especially on Spanish islands.

Most beaches, including those in tourist areas, use a color-coded flag system to indicate safety levels. Red flags signify unsafe water conditions, while yellow flags warn of moderate risks. Green flags signal calm waters, and purple flags indicate the presence of dangerous marine life like jellyfish.

Additionally, lifeguards may display multiple flags simultaneously to signal different hazards, such as water strength or marine creatures. Understanding and following these flag warnings are crucial for beach safety. A black and white checkered flag designates areas reserved for non-powered watercraft, while a red over yellow flag marks the safest beach zone actively monitored by lifeguards.