Aegean Sea Water Temperature Today & Regional Overview

Current Water Temperature

The water temperature in the Aegean Sea today ranges from 21.7°C (Agios Spyridon, Greece) to 24.7°C (Kalamaria, Greece).

As of today, the minimum water temperature in the Aegean Sea ranges from 68°F (20°C) to 74°F (23°C). The water is warm and pleasant for swimming, and in this range, one can stay in the water for extended periods without the risk of hypothermia. This is the ideal temperature for relaxation, swimming, and water sports. Families with children, as well as outdoor enthusiasts, will enjoy swimming and time spent in the water. For most people, this is the optimal temperature for a comfortable beach experience.

It is important to note that these swimming tips and recommendations apply only in good weather. When the air temperature is below 68°F (20°C), and sometimes even below 77°F (25°C), swimming can be unpleasant even with relatively high water temperatures.

Water Temperature and Swimming Conditions Throughout the Year

Month	Min	Max
January	6°C	21°C
February	7°C	20°C
March	8°C	19°C
April	9°C	21°C
May	14°C	25°C
June	17°C	28°C
July	20°C	30°C
August	21°C	30°C
September	20°C	30°C
October	15°C	28°C
November	10°C	26°C
December	7°C	23°C

The Aegean Sea experiences a clear seasonal cycle in water temperature, with noticeable north–south and coastal–open-sea differences. In winter, sea surface temperatures typically range from about 10 °C in the northern Aegean to around 15 °C in the southern islands. Spring sees a steady rise, with waters warming to roughly 15–20 °C by late April and May, while summer brings the warmest conditions: common values are 22–26 °C across much of the central Aegean and 24–28 °C around the southern and more sheltered island groups. In autumn the sea cools gradually, with September and October averages usually between 20 and 24 °C before dropping back toward winter levels. Shallow bays and enclosed gulfs warm and cool faster, so they can be several degrees warmer in summer and colder in winter than the open sea.

Swimming Conditions

Swimming in the Aegean is widely practiced and generally allowed throughout the warmer months because temperatures from late spring to early autumn are comfortable for leisure bathing. Public beaches are accessible and water quality is often good, supporting recreational use. However, winter temperatures are below what most people consider comfortable for casual swimming, so bathing then is limited to hardy individuals or organized cold-water swimmers. Local conditions such as strong winds (notably the meltemi), currents, seasonal rainfall, and occasional pollution advisories can affect safety and comfort, so it is advisable to follow local guidance and posted warnings when deciding to swim.

Popular Resorts with the Warmest Water Today