Swimming in Alonissos
Alonissos is the gateway to the National Marine Park of the Northern Sporades — the largest marine protected area in Europe. Its waters are home to Mediterranean monk seals, and the beaches benefit from the park's strict environmental protection: no motorboats, pristine water, abundant marine life.
With 5 beaches tracked, Alonissos offers varied swimming in exceptionally clean waters. The island's position in the outer Sporades means slightly more wind exposure than Skiathos, but natural bay formations provide reliable shelter on the south and west coasts.
Swimming season runs from June to September. Alonissos is for nature-loving swimmers — the chance of spotting dolphins or monk seals while swimming is real, and the water quality is among the best in the Mediterranean.
Swimming season: June to September
Today's Top Beaches in Alonissos
Live conditions from the Open-Meteo weather API
All 5 Beaches in Alonissos
Check Today's Conditions on Alonissos
Get personalised beach recommendations based on right-now wind, wave, and UV data.
Open Beach Finder