Weather in Kos — today
Now in Kos
🌙
+24°
Clear
Feels like +26° · humidity 73%
Today 12.9: +31° / +24°
🕐 05:25
Wind
11 km/h
UV index
0
Air (AQI)
30 · Good
Precipitation
0%
Humidity
73%
Pressure
1013 hPa
Sunrise / sunset
06:50 / 19:23
Sea temperature
🌊 +28°
👕 What to wear today
Warm — a T-shirt and light trousers or shorts.
Feels warmer by 2°
Weather for an activity:
Detailed weather information for Kos
Today, 12 September, Saturday, in Kos (Greece): clear and sunny, hot. During the day the air will warm up to +31°, at night around +24°. Due to the wind it feels like +26°. Wind up to 18 km/h. No precipitation expected, you won't need an umbrella. Light summer clothing will do — a T-shirt and shorts or light trousers. The sea has warmed up to +28° — great for swimming. The sun will rise at 06:50 and set at 19:23 — daylight lasts 13 hours.Hourly weather in Kos
💧 No precipitation expected on this day. Shaded areas of the chart are the dark hours (before sunrise 🌅 and after sunset 🌇).
Weather in Kos for 14 days
Tap a day to expand it by time of day and open the full forecast. The bar shows the range from the night low (left) to the day high (right).
▶
Today 12.9
☀️
+24° +31°
Morning
☀️
+25°
Day
☀️
+31°
Evening
🌇
+29°
Night
🌙
+24°
▶
Tomorrow 13.9
☁️
+23° +32°
Morning
☀️
+24°
Day
☁️
+32°
Evening
🌇
+28°
Night
🌙
+23°
▶
Mon 14.9
☁️
+24° +28°
Morning
☁️
+25°
Day
☁️
+28°
Evening
🌇
+27°
Night
🌙
+24°
▶
Tue 15.9
⛅
💧 1%
+23° +27°
Morning
⛅
+24°
Day
⛅
+27°
Evening
🌇
+26°
Night
🌙
+23°
▶
Wed 16.9
☁️
💧 11%
+23° +28°
Morning
☁️
+25°
Day
☁️
+28°
Evening
🌇
+27°
Night
🌙
+23°
▶
Thu 17.9
☁️
💧 8%
+21° +30°
Morning
☁️
+24°
Day
☁️
+30°
Evening
🌇
+28°
Night
🌙
+21°
▶
Fri 18.9
🌤️
💧 11%
+21° +29°
Morning
🌤️
+24°
Day
🌤️
+29°
Evening
🌇
+27°
Night
🌙
+21°
▶
Sat 19.9
☁️
💧 10%
+22° +32°
Morning
☁️
+26°
Day
☁️
+32°
Evening
🌇
+30°
Night
🌙
+22°
▶
Sun 20.9
🌤️
💧 10%
+24° +31°
Morning
🌤️
+27°
Day
🌤️
+31°
Evening
🌇
+29°
Night
🌙
+24°
▶
Mon 21.9
☀️
💧 5%
+24° +31°
Morning
☀️
+27°
Day
☀️
+31°
Evening
🌇
+29°
Night
🌙
+24°
▶
Tue 22.9
⛅
💧 4%
+24° +30°
Morning
⛅
+26°
Day
⛅
+30°
Evening
🌇
+29°
Night
🌙
+24°
▶
Wed 23.9
🌤️
💧 4%
+23° +28°
Morning
🌤️
+25°
Day
🌤️
+28°
Evening
🌇
+27°
Night
🌙
+23°
▶
Thu 24.9
☀️
💧 4%
+23° +27°
Morning
☀️
+24°
Day
☀️
+27°
Evening
🌇
+26°
Night
🌙
+23°
▶
Fri 25.9
🌦️
💧 20%
+23° +26°
Morning
🌦️
+24°
Day
🌦️
+26°
Evening
🌇
+25°
Night
🌙
+23°
🗺️ Precipitation radar
Precipitation radar (RainViewer) over a clean base map — updates every 5–10 minutes. Colours show nearby precipitation; if there is none, the map is simply clear — that is normal. Zoom with + / −.
Rain intensity:lightmoderateheavy
🎯 What to do in this weather — indices of the day
Comfort score from 0 (bad) to 100 (excellent), calculated from the day's weather. For “rain” and “UV” a percentage/risk level is shown.
🏖️ Beach
90 / 100
for sea and sun · Excellent
🏊 Swimming
88 / 100
water 28° · Excellent
🏃 Running
50 / 100
comfort for running · Average
🧴 UV
0%
moderate · low
☂️ Rain
0%
unlikely · low
✨ Stars
88 / 100
evening visibility · Excellent
🧺 Laundry drying
66 / 100
will dry outside · Good
🚗 Car wash
95 / 100
no rain expected · Excellent
🌫️ Air quality and pollen
30
Good air
European AQI
PM2.5: 8PM10: 16O₃: 79NO₂: 4 pollen: low
The air is clean — you can walk and exercise outside.
🌅 Sun, moon and sea
Sunrise
06:50
Sunset
19:23
Golden hour
18:49
Daylight
13 h (-2 min vs yesterday)
Sea temperature
+28°
🌊 calm, waves 0.3 m.
Kos climate by month
Long-term averages. Hover over a bar for details. The forecast for a specific month is a combination of the climate normal and the model forecast for the coming weeks.
+14°
+11°
Jan
+14°
+11°
Feb
+15°
+12°
Mar
+18°
+14°
Apr
+21°
+18°
May
+25°
+22°
Jun
+27°
+24°
Jul
+27°
+25°
Aug
+25°
+23°
Sep
+22°
+19°
Oct
+19°
+16°
Nov
+16°
+13°
Dec
swipe sideways →
Bar color shows temperature:frostcoolcomfortablewarmhot— best months to visit
| Month | Day | Night | Sea | Precipitation | What to pack and what makes the month notable (events, nuances) |
|---|---|---|---|---|---|
| January | +14° | +11° | +19° | 163 mm | Cool weather: +14° by day, noticeably colder in the evening. One of the wettest months (163 mm): downpours can derail plans. 🧥 a warm jacket. Sea at +19° — swimmable, refreshing. This is the coldest month of the year. |
| February | +14° | +11° | +18° | 127 mm | Cool: around +14° by day, you'll need a warm layer. It's a rainy month (127 mm) — an umbrella is a must. 🧥 a warm jacket. Sea at +18° — swimmable, refreshing. |
| March | +15° | +12° | +18° | 74 mm | A fresh month — +15° daytime, take a jacket for walks. Frequent rain (74 mm over the month) — keep indoor backup plans. 🧥 a warm jacket. Sea at +18° — swimmable, refreshing. |
| April | +18° | +14° | +18° | 39 mm | Cool weather: +18° by day, noticeably colder in the evening. 🙂 a sweater for the evening. Sea at +18° — swimmable, refreshing. |
| May | +21° | +18° | +20° | 16 mm | One of the best times to visit: +21° by day, fresh nights. 🙂 a sweater for the evening. Sea at +20° — swimmable, refreshing. |
| June | +25° | +22° | +23° | 2 mm | Ideal weather: +25° daytime — neither hot nor cold. 😊 light summer clothing. Water at +23° — great for swimming. The longest daylight hours of the year — more time for everything. |
| July | +27° | +24° | +26° | 0 mm | A comfortable month: +27° by day without exhausting heat. 😊 light summer clothing. Water at +26° — great for swimming. Weather-wise, one of the three best months to visit. |
| August | +27° | +25° | +27° | 0 mm | Warm and comfortable: +27° by day, +25° at night. 😊 light summer clothing. Water at +27° — great for swimming. This is the hottest month of the year in Kos. |
| September | +25° | +23° | +26° | 15 mm | Ideal weather: +25° daytime — neither hot nor cold. 😊 light summer clothing. Water at +26° — great for swimming. |
| October | +22° | +19° | +24° | 60 mm | The most pleasant season: +22° by day, comfortable all day long. 🙂 a sweater for the evening. Water at +24° — great for swimming. |
| November | +19° | +16° | +22° | 117 mm | One of the best times to visit: +19° by day, fresh nights. It's a rainy month (117 mm) — an umbrella is a must. 🙂 a sweater for the evening. Water at +22° — great for swimming. |
| December | +16° | +13° | +21° | 181 mm | A fresh month — +16° daytime, take a jacket for walks. Frequent rain (181 mm over the month) — keep indoor backup plans. 🧥 a warm jacket. Sea at +21° — swimmable, refreshing. Statistically the wettest month of the year. |
When to visit Kos
✅ Recommended time to visit
🌟 Best time: June, July, August
Daytime air+25…+27°
Sea temperature+23…+27°
Precipitationnone
Why: comfortable +25…+27° by day, little rain, warm sea (+23…27°).
⚠️ Doable, with caveats
🌤️ Shoulder season: March, April, May, September, October, November
Daytime air+15…+25°
Sea temperature+18…+26°
Precipitationoften
Why: cool (+15…+25°) — not beach season, but great for city sights and museums.
🔴 Not the best time
🌤️ Shoulder season: January, February, December
Daytime air+14…+16°
Sea temperature+18…+21°
Precipitationoften
Why: the rainy season (127–181 mm/month) — downpours almost daily.
Bottom line: the best time to visit Kos is June – August, and the most comfortable months are June, July, August. The toughest months to visit are January, February, December: frequent rain.
🌡️ Today vs the climate normal
Today's high
+31°
Normal for September
+25°
Deviation
6° warmer than normal
A year ago on this day
+32°
Record for this date
+32° (2025)
The normal, “a year ago” and the record come from the weather archive since 1940 (Open-Meteo / ERA5).
Weather archive for Kos
📅 See what the weather was like on any day since 1940. For example: “what was the weather on March 2, 2021”.
Show the archive for the selected day →
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Weather in cities near Kos
Frequently asked questions about the weather in Kos
What is the weather in Kos right now?＋
Clear, +24°, feels like +26°.
Will it rain in Kos today?＋
No: 0% chance, 0 mm.
When is the best time to visit Kos?＋
Best time to visit — June – August.
Can you swim in Kos in summer?＋
In winter the water is around +19° — swimmable, refreshing. In summer the sea warms up to +25°.
What time are sunrise and sunset in Kos?＋
Sunrise 06:50, sunset 19:23.
Does it snow in Kos in winter?＋
No, it practically never snows.
What is the climate in Kos by month?＋
Summers up to +27° in August, winters around +11° in January; the wettest month is December.
Is it cold in Kos in winter?＋
🧥 Cool. You'll need a warm jacket; it can get chilly in the evening.