August · Greece
Best time to visit Kos in August Weather, crowds & prices
Weather in Kos in August
Average temperature 28°C, 4 mm of rain, about 31 days with 6+ hours of sunshine and 65% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
August score
10.0/10
Ranked #3 of 12 months
- Avg temp
- 28°C
- Rainfall
- 4 mm
- Humidity
- 65%
- Days with 6h+ sun
- 31
- Crowd Density
- Peak Tourist Rush
- Average Expenses
- $$$ · Peak Season Rates ($$$)
August in Kos scores 10.0/10 for beach and coastal travel - one of the top 12-month picks (#3). Expect around 28°C, 4 mm of rain, and roughly 31 days with 6+ hours of sunshine this month.
Kos pairs the Asklepion and a plane tree linked to Hippocrates with sandy beaches and flat cycling routes.
August is one of the strongest months in Kos (3rd)
Days in August average 28°C (82°F) — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
At just 4 mm for the month, rain will not shape your plans; you get about 31 days with 6+ hours of sunshine and 13.5 hours of daylight.
On our climate-comfort scale this is one of the strongest months of the year for Kos at 10/10 (3rd of 12), just behind June at 10/10.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary.
Expect peak pricing, and this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Frequently asked
- What is the weather like in Kos in August?
- In August, Kos averages 28°C, 4 mm of rain, and about 31 days with 6+ hours of sunshine. Its climate-comfort score is 10.0/10.
- Is August a good time to visit Kos?
- August earns a 10.0/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Kos in August?
- Expect about 4 mm of rain in August. Average humidity is 65% and there are about 31 days with 6+ hours of sunshine.
Curated in Kos
Tickets & experiences
Things to do in Kos
Kos, Greece. Live activities and tours from GetYourGuide, matched to this destination.