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Ionian Sea
Alikanas, Greece © Jade Adamand
Ionian Sea Water Temperature: Current & Historical Data for Coastal Resorts
We find every spot where you can swim and tell you what the water temperature is there today and throughout the year
Current water temperature
57°F
minimal
60°F
average
63°F
maximum
Graph of Water Temperature Changes in the Ionian Sea Over the Last 60 Days
Water temperature in the Ionian Sea by month
| Month | Minimum | Maximum |
|---|---|---|
| January | 54°F | 66°F |
| February | 54°F | 64°F |
| March | 54°F | 64°F |
| April | 55°F | 72°F |
| May | 57°F | 77°F |
| June | 64°F | 82°F |
| July | 70°F | 86°F |
| August | 72°F | 86°F |
| September | 68°F | 86°F |
| October | 61°F | 81°F |
| November | 59°F | 77°F |
| December | 54°F | 72°F |
What is known about the Ionian Sea?
Stoupa, Greece © Camilla LantonThe Ionian Sea, located between Italy and Greece, is known for its warm, clear waters, making it an excellent destination for swimming. During the summer months, from June to September, sea temperatures typically range from 75–82°F (24–28°C), with the warmest waters found in August. Coastal areas around Corfu, Zakynthos, and Kefalonia offer some of the most inviting conditions, with calm, crystal-clear waters that are ideal for swimming, snorkeling, and other water activities. The southern part of the Ionian Sea, near the Greek mainland, tends to be slightly warmer than the northern parts due to its deeper waters retaining heat.
Even in the cooler months, the Ionian Sea remains relatively mild. From December to March, water temperatures generally stay between 57–63°F (14–17°C), which is still swimmable for those accustomed to cooler waters, though most people prefer wetsuits during this period. The gentle waves and lack of strong currents in many coastal areas make the Ionian Sea particularly welcoming for swimmers of all levels. Thanks to its warm climate and beautiful surroundings, it is a great destination for swimming almost year-round, with summer offering the most comfortable conditions.
List of Countries Bordering the Ionian Sea
Popular Resorts of the Ionian Sea with the Warmest Water Today
Popular Resorts on the Ionian Sea Coast
- Corfu, Greece
- Lefkada, Greece
- Kalamata, Greece
- Lamezia Terme, Italy
- Lecce, Italy
- Zakinthos, Greece
- Kakovatos, Greece
- Paleokastritsa, Greece
- Stoupa, Greece
- Ithaca, Greece
- Agios Georgios Pagon, Greece
- Agios Gordios, Greece
- Corinth, Greece
- Parga, Greece
- Elafonisos, Greece
Preveza, Greece © kylliki niilson
Nearest Seas and Oceans
Frequently Asked Questions About the Ionian Sea
What is the water temperature in the Ionian Sea right now?
The water temperature in the Ionian Sea today ranges from 57°F (14°C) in Marina di Ginosa (Italy) to 63°F (17°C) in Costa Navarino (Greece).
Is it possible to swim in the Ionian Sea?
Yes, it is possible to swim in the Ionian Sea, as its warm waters and beautiful coastlines make it a popular destination for swimming.
In which month does the Ionian Sea have the highest and lowest water temperatures?
The highest water temperature in the Ionian Sea occurs in July, reaching 86°F (30°C), while the lowest is in January, dropping to 54°F (12°C).
Is the Ionian Sea colder than the Mediterranean Sea?
Yes, the Ionian Sea is slightly colder than the Mediterranean Sea, as its average annual water temperature is 68°F (20°C), while the Mediterranean Sea's is 70°F (21°C).
Which countries are washed by the Ionian Sea?
The Ionian Sea washes Greece, and Italy.
What are the most popular resorts located on the Ionian Sea?
The most popular beach destinations on the Ionian Sea are Corfu (Greece), Zakinthos (Greece), Kalamata (Greece), Lefkada (Greece), Patras (Greece), Parga (Greece), Corinth (Greece), Preveza (Greece), Loutraki (Greece), Igoumenitsa (Greece).
Do you have any extended or additional information about the Ionian Sea?
The Ionian Sea is the deepest in the Mediterranean basin. At the same time, it is quite shallow near the coast, which is convenient for families, and the bottom is covered with sand and small pebbles. The maximum depth is 5120 meters. Let's take a closer look at where the Ionian Sea is. It divides Greece and Italy, rolling waves between the islands of Sicily and Crete.
The Ionian Sea has a calm character. Unlike the Aegean, there are practically no strong and cold winds. It is very convenient for beginner yachtsmen as well as for a relaxing family vacation.
The Ionian Sea is the deepest part of the Mediterranean Sea, its depth reaches 5121 meters. However, near the coast, the bottom does not go deep into the depths; on many beaches near the coast, there is shallow water ideal for children.
The sea water has a deep blue hue, in contrast to the azure Aegean. This is the saltiest sea in Greece - the salinity level is 38% (20% higher than in the Black Sea), making it easy to keep on the water even for those who do not know how to swim.
Do you have a few more photos of the the Ionian Sea?
Ypsos, Greece © Gabriela Kalinowska-Czakon.
Derveni, Greece © Eduard S
Marina di Ginosa, Italy © Carmine Dall'Arche