KosPhoto: Stimoroll · CC BY-SA 4.0Greece · Europe
Best time to visit Kos
Kos is flat, easy to explore by bike and has long sandy beaches. The climate is typically Aegean: dry, hot summers and a warm sea from June to October.
Climate decision
Best travel months for Kos
Top recommendation
Next highest scores
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Latest 5-year values 2021–2025
Average of the five most recent complete years compared with the 1991–2025 climate average.
July · Mean daily maximum
33.1 °C
1991–2025: 31.5 °C
+1.6 °C · higher
February · Wet days
7.4 days/month
1991–2025: 10.3 days/month
-2.9 days/month · lower
February · Monthly precipitation
66.8 mm/month
1991–2025: 99.4 mm/month
-32.6 mm/month · lower
August · Sea temperature
26.3 °C
1991–2025: 25.2 °C
+1.1 °C · higher
August: 127/155 days at or above 30 °C; highest single value 39.8 °C.
Five-year historical sample, not a weather forecast or long-term climate trend. Individual hot days can be far above the monthly mean.
Annual profile · Coast and sea
Kos: the swimming season follows two curves
Average daily highs vary by 17.4 °C through the year, while the sea varies by 8.5 °C. Air and water temperature should therefore be considered separately.
The practical difference
The month with the highest daytime temperature and the month with the warmest sea need not define the same travel window. Rain and sunshine help resolve the trade-off.
Warmest sea
August · 25.2 °C
Highest average daily high
July and August · 31.8 °C
Fewest rainy days
August · 0.5
Most sunshine
June · 9.9 h
Month by month
Overall suitability per month. Tap a month for details.
All climate figures compared
The table is the complete accessible data view; the charts below highlight selected patterns.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Rain mm | Sun h/day (est.) | Humidity % | Wind m/s | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|---|
| January | 14 | 11 | 12 | 133 | 2.9 | 74 | 4.6 | 18 | 43 |
| February | 15 | 10 | 10 | 99 | 4.0 | 74 | 4.7 | 17 | 48 |
| March | 16 | 12 | 8 | 68 | 5.7 | 73 | 4.4 | 17 | 60 |
| April | 19 | 14 | 6 | 42 | 7.3 | 72 | 3.7 | 17 | 72 |
| May | 24 | 18 | 4 | 24 | 8.7 | 70 | 3.2 | 19 | 86 |
| June | 28 | 21 | 1 | 5 | 9.9 | 63 | 3.6 | 22 | 87 |
| July | 32 | 24 | 1 | 2 | 9.9 | 58 | 3.9 | 24 | 79 |
| August | 32 | 24 | 0 | 2 | 8.9 | 60 | 3.7 | 25 | 79 |
| September | 29 | 22 | 2 | 16 | 7.2 | 63 | 3.9 | 25 | 90 |
| October | 25 | 19 | 5 | 45 | 5.2 | 67 | 3.6 | 23 | 91 |
| November | 20 | 15 | 9 | 91 | 3.5 | 70 | 4.0 | 21 | 73 |
| December | 16 | 12 | 13 | 147 | 2.6 | 74 | 4.5 | 19 | 49 |
Climate through the year
Compare temperature, rainy days, sunshine and, for coastal destinations, sea temperature month by month.
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Where to stay in Kos
Compare available stays, prices and cancellation terms for Kos on Booking.com.
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The number is the overall climate score, not a similarity score.
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Frequently asked questions
When is the best time to visit Kos?
The strongest climate months are May, June, September, October. Values are historical averages, not a forecast.
Which month has the highest average daily maximum temperature in Kos?
Average daily maximum temperatures in Kos are practically tied in July and August at around 32 °C.
When is the sea warmest at Kos?
In August, at around 25 °C.