Greece's tourism boom strains water supplies on popular islands

Greece ranks among 25 countries where annual international visitors outnumber residents, with nearly 2.7 tourists per citizen according to UN tourism data. The surge in arrivals – over 40 million in 2024 – fuels a tourism sector that accounts for about 25 % of the nation’s GDP.

Eight Aegean islands – Astypalea, Tinos, Alonissos, Leros, Patmos, Symi, Karpathos and Poros – have declared a water‑supply emergency as prolonged drought and record summer temperatures push freshwater reserves to a projected five‑month limit. Local officials warn that water scarcity could worsen if visitor numbers remain high.

The tourism boom also spurs infrastructure projects, such as a new airport on Crete slated to handle up to 18 million passengers annually, easing pressure on the existing Heraklion and Chania airports. Meanwhile, travel guides highlight lesser‑known islands like Skopelos and Astypalea as quieter alternatives to heavily visited spots such as Santorini and Mykonos.

Cultural notes note that 96 % of Greeks identify as Orthodox, that water conservation is urged on the Kyklades, and that local customs – such as reversed head‑nod gestures – can surprise visitors.