How warm is the sea in Zakynthos?
The sea in Zakynthos is currently 29°C.
Sea temperature is measured at the surface and updated hourly.
The sea in Zakynthos is 29°C today, the weather is clear, 34°C.

Greece
Last updated: 8 August 2026, 14:59 · The data may not be fully up to date.
Yellow warning for high temperatures until 18:00, per MeteoAlarm
Today Zakynthos can expect partly cloudy, with a high of around 34°. Over the coming days the weather stays similar, with temperatures between 25° and 36°. No significant rain is expected.
Next 48 hours
The best time to visit is from June to September. The sea is warmest in August (27.5°C).
| Month | Max | Min | Rain (days) | Sea |
|---|---|---|---|---|
| January | 12° | 8° | 15 | 17° |
| February | 13° | 8° | 10 | 17° |
| March | 14° | 9° | 12 | 17° |
| April | 17° | 11° | 6 | 17° |
| May | 21° | 15° | 7 | 19° |
| June | 26° | 19° | 3 | 24° |
| July | 30° | 22° | 1 | 27° |
| August | 30° | 23° | 2 | 28° |
| September | 26° | 20° | 6 | 26° |
| October | 22° | 17° | 8 | 24° |
| November | 17° | 13° | 14 | 22° |
| December | 14° | 10° | 13 | 19° |
Zakynthos is an Ionian island south of Kefalonia, known for its bright rocky shores, blue caves and turquoise sea. Its most recognisable feature is Navagio beach, with a shipwreck in a cove reachable only by boat, while the southern bay of Laganas is an important nesting ground for loggerhead sea turtles. The island combines dramatic scenery with a lively tourist scene. For Macedonian visitors it is reached by flight, most often on package trips. Summers are hot and dry, with August sea temperatures of around 27°, and the season runs from late May into October.
The sea in Zakynthos is currently 29°C.
Sea temperature is measured at the surface and updated hourly.
The best time to visit is from June to September. The sea is warmest in August (27.5°C).
Derived from the 2015–2024 climate averages.
Tomorrow in Zakynthos expect cloudy, with a high of 36°C and a low of 26°C.
The weekend forecast for Zakynthos: partly cloudy on Saturday (34°/25°), cloudy on Sunday (36°/26°).