Best time to visit
Best Time to Visit Kos
A Dodecanese island near the Turkish coast, with long sandy beaches, ancient ruins and flat roads made for cycling.
Best time to visit: May–June and September–October for warm sea and fewer crowds.
Local tip: Rent a bike in Kos Town; there are cycle lanes along the coast.
Getting around: Buses connect the main resorts; ferries go to nearby islands and to Bodrum in Turkey.
Good to know: The summer meltemi wind keeps temperatures bearable but can make the north coast choppy.
What to plan your trip around
- Asklepion
The ancient healing sanctuary linked to Hippocrates.
- Neratzia Castle
A Knights of St John fortress by the harbour.
- Paradise Beach
A popular sandy beach on the south coast.
- Zia
A mountain village known for its sunset views.
Kos weather by month
Kos weather by month
Average temperatures and rainfall Kos gets in each month (2011–2020). Tap a month for the full breakdown.
| Month | High | Low | Rain | Humidity |
|---|---|---|---|---|
| January | 14°C | 10°C | 166 mm | 74% |
| February | 15°C | 11°C | 112 mm | 75% |
| March | 17°C | 12°C | 74 mm | 74% |
| April | 20°C | 14°C | 41 mm | 72% |
| May | 24°C | 18°C | 28 mm | 70% |
| June | 28°C | 22°C | 7 mm | 66% |
| July | 32°C | 24°C | 2 mm | 60% |
| August | 32°C | 25°C | 3 mm | 60% |
| September | 29°C | 22°C | 19 mm | 63% |
| October | 25°C | 19°C | 50 mm | 66% |
| November | 20°C | 16°C | 88 mm | 68% |
| December | 16°C | 12°C | 134 mm | 72% |
Kos through the year
January · 14° / 10°C · 166 mm
- Rain is above Kos's usual level, by about 175%.
- There's little difference between day and night (around 4°C).
April · 20° / 14°C · 41 mm
- In Kos, April is mid-spring.
- Good walking weather for combining Neratzia Castle and Asklepion in one day.
July · 32° / 24°C · 2 mm
- Only one month is warmer in Kos than July.
- Rain is well below Kos's usual level (around 97% less).
October · 25° / 19°C · 50 mm
- Temperatures are falling — expect highs around 4°C lower by November.
- Seasonally, October counts as mid-autumn in Kos.
The best time to visit Kos is April, May and June, when average highs are 20–28°C and rainfall is around 25 mm a month.
At a glance
When to go to Kos, season by season
December – February
Rainy15° / 11°C · 137 mm
The wettest part of the year. Showers are likely, so pack a rain jacket and keep plans flexible.
March – May
Best time20° / 15°C · 48 mm
Pleasant temperatures and relatively little rain: the best window for sightseeing and time outdoors.
June – August
Good31° / 24°C · 4 mm
Comfortable weather overall, with fewer visitors than peak season.
Frequently asked questions
- When is the best time to visit Kos?
- For pleasant, fairly dry weather, go to Kos in April, May and June. Average highs are then 20–28°C.
- Why is April a good time to visit Kos?
- In April, Kos averages 20°C by day and 14°C at night, with about 41 mm of rain and 41% cloud cover: warm enough to be outdoors without the peak heat or the wettest weather.
- What is the warmest month in Kos?
- August is the warmest month in Kos, with average highs of 32°C and lows of 25°C.
- What is the coldest month in Kos?
- January is the coldest month in Kos: average highs of 14°C, dropping to 10°C at night.
- When does it rain the most in Kos?
- January is the wettest month in Kos with about 166 mm of rain. The driest is July, with around 2 mm.
- When is the worst time to visit Kos?
- January is the least reliable month in Kos, with around 166 mm of rain. Bring a rain jacket and keep a flexible plan.
- Is the shoulder season a good time to visit Kos?
- Yes. March sits just outside the best months for Kos, with average highs of 17°C and about 74 mm of rain a month. Weather-wise, it is a good alternative to the peak months.
- How can I check the weather in Kos before I travel?
- Compare the live forecast for Kos from three independent weather services on WeatherCompare. When they agree, the forecast is more reliable.
Cite or embed this data
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Best time to visit Kos. WeatherCompare, 2026 (climate averages: NASA POWER / ERA5, 2011–2020). https://weathercompare.eu/guides/best-time-to-visit/greece/kos
<a href="https://weathercompare.eu/guides/best-time-to-visit/greece/kos">Best time to visit Kos</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/greece/kos" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Best time to visit Kos"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/guides/best-time-to-visit/greece/kos">Best time to visit Kos</a> – WeatherCompare</p>