INSTRUMENT / SEA TEMPERATURE
Updated Sat 14:59 (Europe/Athens)
Greece · Forecast updated Nov 7, 2026, 14:59 UTC
Current Sea Temperature
22.1°C
71.8°F
Mild water
Valid Nov 7, 2026, 14:59 (Europe/Athens). Source: stored Open-Meteo marine forecast. Temperature is not a safety rating or snorkel score.
Versus this month's average
0.4°C above
The typical November average is 21.7°C (71.1°F) from the historical baseline.
Recent trend
Cooling by 1.1°C
Seven-day average: 22.5°C, versus 23.6°C in the prior seven days.
What to wear
Mild water
A rash guard is useful; cold-sensitive snorkelers may prefer a shorty wetsuit.
Cold tolerance varies. Wind, session length, sunshine, and exertion also affect comfort; temperature alone does not describe sea conditions or replace the snorkel forecast.
In the historical baseline for Zakynthos, typical monthly averages range from about 16.6°C (61.9°F) in February to 27.0°C (80.6°F) in August.
Over the past 30 days, the average sea temperature in Zakynthos has been 23.8°C.
Northern Hemisphere. Summer is generally June–August; winter is December–February.
Typical monthly sea-surface temperature near Zakynthos, calculated from hourly observations for 2022–2025. This is not this site's forecast archive.
| Month | Typical range | Average |
|---|---|---|
| January | 17.2–17.9°C | 17.6°C / 63.7°F |
| February | 16.2–17.0°C | 16.6°C / 61.9°F |
| March | 16.0–17.0°C | 16.7°C / 62.1°F |
| April | 16.3–18.1°C | 17.2°C / 63.0°F |
| May | 18.7–19.9°C | 19.4°C / 66.9°F |
| June | 23.2–24.0°C | 23.7°C / 74.7°F |
| July | 26.0–27.1°C | 26.4°C / 79.5°F |
| August | 26.1–28.8°C | 27.0°C / 80.6°F |
| September | 25.5–26.7°C | 26.1°C / 79.0°F |
| October | 22.5–24.4°C | 23.3°C / 73.9°F |
| November | 21.2–22.1°C | 21.7°C / 71.1°F |
| December | 18.2–19.1°C | 18.7°C / 65.7°F |
Source: Open-Meteo Marine API, MeteoFrance sea-surface temperature dataset. Nearest sea grid cell (37.71, 20.71). Each month is the mean of yearly monthly means; the range is the lowest and highest of those yearly monthly means. Open-Meteo methodology.
Each month uses the 2022–2025 baseline. The range is the lowest and highest yearly monthly mean, not an hourly extreme.
Typical January water temperature near Zakynthos is 17.6°C (63.7°F), with yearly monthly means from 17.2–17.9°C.
Swimming and snorkeling: cold water. Use a full 3-5 mm wetsuit and keep the session within your cold-water experience.
Adjacent months: December 18.7°C · February 16.6°C.
Explore Zakynthos sea temperature in January, including swim comfort and month comparisons →
Typical February water temperature near Zakynthos is 16.6°C (61.9°F), with yearly monthly means from 16.2–17.0°C.
Swimming and snorkeling: cold water. Use a full 3-5 mm wetsuit and keep the session within your cold-water experience.
Adjacent months: January 17.6°C · March 16.7°C.
Explore Zakynthos sea temperature in February, including swim comfort and month comparisons →
Typical March water temperature near Zakynthos is 16.7°C (62.1°F), with yearly monthly means from 16.0–17.0°C.
Swimming and snorkeling: cold water. Use a full 3-5 mm wetsuit and keep the session within your cold-water experience.
Adjacent months: February 16.6°C · April 17.2°C.
Explore Zakynthos sea temperature in March, including swim comfort and month comparisons →
Typical April water temperature near Zakynthos is 17.2°C (63.0°F), with yearly monthly means from 16.3–18.1°C.
Swimming and snorkeling: cold water. Use a full 3-5 mm wetsuit and keep the session within your cold-water experience.
Adjacent months: March 16.7°C · May 19.4°C.
Explore Zakynthos sea temperature in April, including swim comfort and month comparisons →
Typical May water temperature near Zakynthos is 19.4°C (66.9°F), with yearly monthly means from 18.7–19.9°C.
Swimming and snorkeling: cool water. A 3 mm shorty or full wetsuit will make longer snorkels more comfortable.
Adjacent months: April 17.2°C · June 23.7°C.
Explore Zakynthos sea temperature in May, including swim comfort and month comparisons →
Typical June water temperature near Zakynthos is 23.7°C (74.7°F), with yearly monthly means from 23.2–24.0°C.
Swimming and snorkeling: mild water. A rash guard is useful; cold-sensitive snorkelers may prefer a shorty wetsuit.
Adjacent months: May 19.4°C · July 26.4°C.
Explore Zakynthos sea temperature in June, including swim comfort and month comparisons →
Typical July water temperature near Zakynthos is 26.4°C (79.5°F), with yearly monthly means from 26.0–27.1°C.
Swimming and snorkeling: warm water. Most people are comfortable in swimwear or a light rash guard.
Adjacent months: June 23.7°C · August 27.0°C.
Explore Zakynthos sea temperature in July, including swim comfort and month comparisons →
Typical August water temperature near Zakynthos is 27.0°C (80.6°F), with yearly monthly means from 26.1–28.8°C.
Swimming and snorkeling: warm water. Most people are comfortable in swimwear or a light rash guard.
Adjacent months: July 26.4°C · September 26.1°C.
Explore Zakynthos sea temperature in August, including swim comfort and month comparisons →
Typical September water temperature near Zakynthos is 26.1°C (79.0°F), with yearly monthly means from 25.5–26.7°C.
Swimming and snorkeling: warm water. Most people are comfortable in swimwear or a light rash guard.
Adjacent months: August 27.0°C · October 23.3°C.
Explore Zakynthos sea temperature in September, including swim comfort and month comparisons →
Typical October water temperature near Zakynthos is 23.3°C (73.9°F), with yearly monthly means from 22.5–24.4°C.
Swimming and snorkeling: mild water. A rash guard is useful; cold-sensitive snorkelers may prefer a shorty wetsuit.
Adjacent months: September 26.1°C · November 21.7°C.
Explore Zakynthos sea temperature in October, including swim comfort and month comparisons →
Typical November water temperature near Zakynthos is 21.7°C (71.1°F), with yearly monthly means from 21.2–22.1°C.
Swimming and snorkeling: cool water. A 3 mm shorty or full wetsuit will make longer snorkels more comfortable.
Adjacent months: October 23.3°C · December 18.7°C.
Explore Zakynthos sea temperature in November, including swim comfort and month comparisons →
Typical December water temperature near Zakynthos is 18.7°C (65.7°F), with yearly monthly means from 18.2–19.1°C.
Swimming and snorkeling: cool water. A 3 mm shorty or full wetsuit will make longer snorkels more comfortable.
Adjacent months: November 21.7°C · January 17.6°C.
Explore Zakynthos sea temperature in December, including swim comfort and month comparisons →
These values come from hourly forecasts SnorkelForecast has stored. They cover only months with records and do not replace the historical baseline.
| Month | Min | Average | Max |
|---|---|---|---|
| January | 16.6°C / 61.9°F | 17.3°C / 63.1°F | 18.4°C / 65.1°F |
| February | 16.2°C / 61.2°F | 16.5°C / 61.6°F | 16.8°C / 62.2°F |
| March | 16.0°C / 60.8°F | 16.4°C / 61.5°F | 17.0°C / 62.6°F |
| April | 15.9°C / 60.6°F | 17.1°C / 62.8°F | 19.2°C / 66.6°F |
| May | 18.0°C / 64.4°F | 19.5°C / 67.1°F | 22.8°C / 73.0°F |
| June | 21.5°C / 70.7°F | 24.2°C / 75.5°F | 27.1°C / 80.8°F |
| July | 25.1°C / 77.2°F | 27.0°C / 80.7°F | 29.3°C / 84.7°F |
| August | 26.6°C / 79.9°F | 28.2°C / 82.7°F | 29.6°C / 85.3°F |
| September | 25.0°C / 77.0°F | 27.2°C / 80.9°F | 29.8°C / 85.6°F |
| October | 21.0°C / 69.8°F | 23.3°C / 74.0°F | 25.7°C / 78.3°F |
| November | 19.9°C / 67.8°F | 21.4°C / 70.5°F | 23.3°C / 73.9°F |
| December | 18.4°C / 65.1°F | 19.0°C / 66.2°F | 19.9°C / 67.8°F |
Profile calculated from 10152 hourly forecast records across 15 monthly periods. This is a growing archive, not a long-term climate normal.
Crystal clear Ionian Sea waters
The current sea surface temperature near Zakynthos is 22.1°C (71.8°F). Over the last 30 days, the average has been 23.8°C.
The water is typically warmest in August, at around 27.0°C (80.6°F) in the 2022–2025 historical baseline.
The water is typically coldest in February, at around 16.6°C (61.9°F) in the same historical baseline. A wetsuit is usually recommended during this period.
At 22.1°C, the water is usually comfortable for swimming and snorkeling.
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