Kos · May
Best travel monthTravel seasonGreece · Europe
Climate Overview
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Ø day, range from coolest to warmest dayØ dayrange | 15° (59°)7– (45–)18 (64) | 15° (59°)8– (46–)18 (64) | 17° (63°)12– (54–)21 (70) | 20° (68°)15– (59–)26 (79) | 25° (77°)19– (66–)30 (86) | 29° (84°)24– (75–)34 (93) | 32° (90°)28– (82–)36 (97) | 32° (90°)28– (82–)36 (97) | 29° (84°)24– (75–)34 (93) | 24° (75°)18– (64–)28 (82) | 20° (68°)14– (57–)25 (77) | 16° (61°)9– (48–)21 (70) |
Ø night, range from coldest to warmest nightØ nightrange | 9° (48°)1– (34–)15 (59) | 10° (50°)2– (36–)14 (57) | 11° (52°)2– (36–)15 (59) | 14° (57°)8– (46–)17 (63) | 17° (63°)12– (54–)20 (68) | 21° (70°)17– (63–)25 (77) | 23° (73°)20– (68–)26 (79) | 24° (75°)20– (68–)26 (79) | 21° (70°)16– (61–)24 (75) | 18° (64°)12– (54–)21 (70) | 14° (57°)6– (43–)19 (66) | 11° (52°)3– (37–)16 (61) |
☀️Sunshine | 6h UV 5 | 8h UV 6 | 9h UV 7 | 11h UV 9 | 12h UV 9 | 13h UV 10 | 13h UV 10 | 12h UV 9 | 11h UV 8 | 9h UV 6 | 7h UV 5 | 6h UV 4 |
🌊Water Temp | 18° (64°) | 17° (63°) | 17° (63°) | 18° (64°) | 20° (68°) | 23° (73°) | 24° (75°) | 26° (79°) | 25° (77°) | 24° (75°) | 22° (72°) | 20° (68°) |
🌧Rain Days | 9d89mm (3.5") | 5d68mm (2.7") | 5d61mm (2.4") | 1d7mm (0.3") | 2d23mm (0.9") | 0d2mm (0.1") | 0d0mm (0") | 0d0mm (<0.1") | 1d12mm (0.5") | 2d22mm (0.9") | 4d45mm (1.8") | 8d85mm (3.3") |
Best travel time current monthØ = average · small figures = range: coolest–warmest day / coldest–warmest nightClimate data 2005–2025 · Source: ERA5 + station data
Travel season — mid-range prices, good availability.
May is one of the best months to visit Kos — with 12 sunshine hours per day and pleasant highs of 25°C (77°F).
Daytime highs average 25°C (77°F), cooling to 17°C (63°F) at night (daily average: 21°C (70°F)). Peaks reach around 30°C (86°F), the coldest nights around 12°C (54°F). With 12 sunshine hours per day, May is one of the sunniest months — 23 mm (0.9 in) of rain over 2 days. The sea is 20°C (68°F) — refreshing and manageable for confident swimmers.
Summer clothing and a light jacket for evenings is enough. Conditions are ideal for excursions, hikes, and sightseeing.
The island is greener than ever and scattered with poppies. Kos is flat, which makes it the cycling island of the Aegean — in spring you ride the coast roads without heat and without traffic. First swimmers; the water is still 17 to 20°C (63 to 68°F).
Packing list for Kos in May
- T-shirts and shorts
- Light jacket for cool evenings
- Swimwear (the water is still a little fresh)
- SPF 50 sunscreen
- Sunglasses
- Sun hat
- Travel first-aid kit
Frequently Asked Questions
- Is May a good time to visit Kos?
- Yes — May is one of the best months to visit Kos (Climate Score: 84/100). Pleasant temperatures (25°C (77°F)), good sunshine (12 h/day), and few rain days (2) make it one of the most recommended months.
- How warm is it in Kos in May?
- In May, Kos sees daily highs of 25°C (77°F). Nights cool to 17°C (63°F), with a daily average of 21°C (70°F). Peaks reach around 30°C (86°F), the coldest nights around 12°C (54°F).
- How much rain falls in Kos in May?
- In May, Kos receives an average of 23 mm (0.9 in) of rain over 2 rain days. That is comparatively dry.
- How many sunshine hours does Kos get in May?
- Kos averages 12 sunshine hours per day in May — above the annual average.
- How warm is the water in Kos in May?
- Water temperature in Kos in May averages 20°C (68°F) — refreshing but slightly cool for sensitive swimmers.
