Weather in Kos in August 2025
- August is usually the hottest month of the year in Kos;
Average weather
Average temperature in Kos in August
Going from a maximum of +29°C during the day to a minimum of +25°C during the night, the temperature in August averages around +27°C.
The average maximum temperature goes up 25% by the end of the month, compared with the beginning of the month, from +26°C to +27°C.
Is Kos warm or cold in August?
Kos is typically warm in August.
Maximum temperatures go up compared to the previous month from +27°C to +28°C. The minimum temperature also goes up from +24°C to +25°C.
It’s generally warm, but pack a long-sleeve shirt for evenings.
August is the hottest month in Kos, here is the comparison with other months:
Water temperature in Kos in August
Water in Kos in August is Warm. It varies from +24°C to +28°C, with an average of +26°C. This is almost similar to the air temperature, which averages +28°C.
The water temperature in August is one of the warmest of the entire year:
Can you swim in Kos in August?
Climate in Kos in August
| July | August | September | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +27°C | +28°C | +25°C | ||||
| Min. temperature | ||||||
| +18°C | +22°C | +17°C | ||||
| Max. temperature | ||||||
| +38°C | +38°C | +36°C | ||||
| Rainfall | ||||||
| 0 mm | 0 mm | 9 mm | ||||
| Wind | ||||||
| 7 m/s | 6 m/s | 6 m/s | ||||
| Avg. water temperature | ||||||
| +25°C | +26°C | +26°C | ||||
| Humidity | ||||||
| 77% | 79% | 76% | ||||
| Air pressure | ||||||
| 1006 HPa | 1007 HPa | 1011 HPa | ||||
| Sunny days | ||||||
| 31 | 31 | 26 | ||||
| Cloudy days | ||||||
| 0 | 0 | 2 | ||||
| Rainy days | ||||||
| 0 | 0 | 2 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
August weather is still as great as in July. It’s getting warmer as August arrives. The average maximum temperature goes up from +27°C to +28°C during the day. The rainfall amount in August stays the same as in the previous month with a 0 mm of total precipitation. Humidity rises from 77% to 79%. Winds are calmer in comparison to July, going down from 7 m/s to 6 m/s on average. The amount of sunny days stay about the same, averaging 31 sunny days during the month.
September brings much the same weather, it remains great.
Wind
The average wind speed is 5 m/s getting up to 9 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Kos is gradually decreasing during August, going from 6 m/s to 4 m/s over the course of the month.
How was the weather last August in Kos?
Climate Change over Years
The climate in Kos in August has not changed much over the last 43 years.
The average temperature was the lowest in 1992 (+19°C) and the highest in 2018 (+24°C). The driest year was 1992 with only 335 mm of rainfall, and the wettest year was 2019 with 1062 mm.
FAQ
Is August a good time to visit Kos?
Can you sunbathe in Kos in August?
Can you swim in Kos in August?
Is Kos rainy in August?
Is it sunny in Kos in August?
Other cities in Greece
Monthly weather in Kos
Source of the data
For this page, we’ve looked at the typical weather in Kos, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.