Tourists heading to Spain, Turkey or Greece should learn the beach flag system before swimming, as the UK Foreign Office warns that people die every year in the sea and swimming pools.
Foreign Office advice on beach safety
The Foreign Office advises holidaymakers to always supervise children near pools and the sea, even if they can swim or a lifeguard is present. Situations can change instantly, even for experienced swimmers.
On its advice page for Spain, the Foreign Office notes that some beaches, especially around Spanish islands, may have strong undercurrents. Hidden rocks or shallow depths can cause serious injury or death. It advises against diving into unknown water and swimming where a river runs into the sea.
Understanding the flag system
Most beaches, including tourist spots, use a colour-coded flag system to indicate safety. The Foreign Office says: "Many beaches have a flag system. Make sure you understand the system and follow any warnings (a red flag means you must not enter the water). Take extra care and get local knowledge if there are no lifeguards, flags or signs."
Lifeguards often fly multiple flags to signal different hazards, such as water strength or marine life like jellyfish.
What each flag colour means
- Red flag (high danger): Unsafe water conditions like strong currents, rough surf, or severe undertows. Two red flags mean the water is closed to the public.
- Yellow flag (medium hazard): Moderate surf, light currents, or rougher waters. Swimming is allowed, but weak swimmers and children should avoid it.
- Green flag (low hazard): Calm conditions with low risk, but swimmers should stay aware.
- Purple flag (marine pests): Dangerous stinging marine life, such as jellyfish, stingrays, or sea urchins. It does not indicate sharks.
- Black and white checkered flag: Area for surfboards, kayaks, and other non-powered watercraft. Swimming and bodyboarding are prohibited.
- Red over yellow flag (lifeguarded area): The safest zone, actively monitored by lifeguards.
