Dave and Gerry's Alonissos Island Information Site

Average Summer Sea Temperatures on Alonissos

The chart below gives an indication of the average sea temperatures on Alonissos and in the Sporades island chain between April and October.  If you intend to swim in the Aegean during the winter months you only need to know that the water will be cold.  You don't really need to know how cold, do you?
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