AI-generatedİzmit at a glance
- Best time
- May – Sep
- Warmest month
- Aug · 29°
- Warmest sea
- Aug · 25.2°
- Sunshine a year
- 2,000 h
- Rain a year
- 807 mm
- Climate
- Temperate
- Time zone
- UTC+3
- Elevation
- 19 m
Climate in İzmit
İzmit has a temperate climate with warm summers and cool winters. August is the warmest month with average highs of 29 °C, while January is the coolest at 9 °C. With around 2,000 hours of sunshine a year, İzmit is moderately sunny; July is the sunniest month with 9.3 hours a day.
Holiday weather through the year
Weather in October
Holiday weather in October
Good
Best time to visit: May – September
Good forSightseeing & walks
A typical day in October
- Morning, 08:00: about 14°
- Midday, 13:00: about 20°
- Afternoon, 16:00: about 20°
- Evening, 20:00: about 17°
- Night, 23:00: about 15°
07:1018:22
Cool evenings: pack a jumper or a jacket.
Estimated from the average high and low: coolest around sunrise, warmest in mid-afternoon.
Light for photos in October
- Golden hour
- Morning 06:53–07:47 · evening 17:45–18:39
- Blue hour
- Morning 06:42–06:53 · evening 18:39–18:49
Golden hour: the sun between 4° below and 6° above the horizon; blue hour: 6° to 4° below it. Times for the 15th of the month; mountains and clouds shift the light.
What is the weather like in İzmit in October?
In October, İzmit is mild: daytime highs average 20 °C, and nights cool down to about 13 °C. The sea averages 19.5 °C – bracing, so a wetsuit helps for longer swims. Expect around 4 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 84 mm in total. All in all, October is a good month for a holiday in İzmit.
More details for October
- Daylight
- 11 h 12 min07:10 – 18:22
- UV index
- 4 · moderateclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 14 km/haverage daily peakAll months
- Cloud cover
- 57 %on averageAll months
- Hot days
- 1 day30 °C or moreAll months
- Snow days
- 0 days1 cm or more of fresh snowAll months
- Time zone
- UTC+3Europe/Istanbul
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %23 %
- Few rainy daysweight 30 %55 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in October
- Wetsuit for longer swims
- Sunscreen
- A jumper for the evenings
- Rain jacket or umbrella
Sea temperature in İzmit
Monthly sea surface temperature with the range of cooler and warmer years.
8 in 10 years: 18.0 – 21.1 °C
Swimming season: Jun – Sep
- cold
- fresh
- refreshing
- pleasant
- warm
- very warm
The sea temperature in İzmit ranges from 7.6 °C in February to 25.2 °C in August. It is warm enough for a comfortable swim (20 °C and more) from June to September.
In December the sea is even warmer than the afternoon air. The sea temperature varies from year to year: in August, eight out of ten years were between 24.1 and 26.2 °C.
| Month | Average | Cool year | Warm year | Feels |
|---|---|---|---|---|
| JanuaryJan | 9.0° | 7.1° | 10.6° | cold |
| FebruaryFeb | 7.6° | 6.5° | 8.9° | cold |
| MarchMar | 8.1° | 7.0° | 9.1° | cold |
| AprilApr | 10.6° | 9.2° | 11.4° | cold |
| MayMay | 15.6° | 14.2° | 16.8° | cold |
| JuneJun | 21.2° | 20.2° | 22.2° | refreshing |
| JulyJul | 24.3° | 23.5° | 25.3° | pleasant |
| AugustAug | 25.2° | 24.1° | 26.2° | pleasant |
| SeptemberSep | 23.1° | 22.1° | 24.2° | pleasant |
| OctoberOct | 19.5° | 18.0° | 21.1° | fresh |
| NovemberNov | 15.5° | 14.1° | 17.4° | cold |
| DecemberDec | 11.7° | 9.9° | 13.2° | cold |
Sunshine hours in İzmit
Average hours of bright sunshine per day, next to the length of the day. Tap a month to select it.
In October, the sun shines for about 4.4 of 11.2 hours of daylight in İzmit, 39 % of the day.
Sunshine hours: measured at the weather station 1 km away, averages 1991–2020 (WMO climate normals). Daylight is the time from sunrise to sunset on the 15th of the month.
UV index in İzmit
How strong the sun is at noon, month by month, and how quickly unprotected skin burns.
- Clear-sky UV in October
- 4 · moderateAround midday seek shade; use sunscreen, a hat and sunglasses.
The sun is strongest in June (UV 10).
Minutes until sunburn in October
- Very fair skin
- about 35 min
- Fair skin
- about 45 min
- Light brown skin
- about 60 min
- Olive skin
- about 75 min
Rough guide for unprotected skin at noon under a clear sky; clouds lengthen it, water, sand and snow shorten it. Sunscreen extends the time only partly.
Monthly values: clear-sky noon estimate from the sun's angle, ozone and altitude. UV today: Open-Meteo forecast.
Rain in İzmit: rainy days and rainfall
A rainy day is a day with at least 1 mm of rain or snow; the amount is what falls in the whole month. Tap a month to select it.
In October, İzmit has about 10 rainy days with 84 mm of rain in total.
Wind and clouds in İzmit
How breezy and how cloudy İzmit is through the year. Tap a month to select it on the whole page.
Wind
Typical daily peak of the wind in km/h: what the afternoon breeze usually reaches, not the gusts.
In October, the wind in İzmit typically peaks at 14 km/h during the day: Beaufort 3, light breeze.
Breezy months for windsurfing and kiting
The daily breeze rarely reaches Beaufort 4 (20 km/h), so wind sports depend on single windy days.
Clouds
Average share of the sky covered by cloud, day and night.
In October, cloud covers on average 57 % of the sky over İzmit: variable cloud, with about 4.4 hours of sunshine a day.
Wind: mean daily maximum of the hourly wind 10 m above ground (ERA5, 1996–2025). Gusts are stronger, and the model grid of about 28 km smooths out local effects such as capes and valley winds. Clouds: mean total cloud cover of all layers over day and night (ERA5, 1996–2025). Thin high cloud counts as cover even when the sun still shines through.
Heat and humidity in İzmit
How often the day gets hot in İzmit (30 °C and more), and in which months heat and humidity come together. Tap a month to select it.
Heat calendar
- pleasant
- some hot or muggy days
- often muggy
- often hot
- hot and muggy
In October, İzmit has about 1 hot days, with an average daytime high of 20 °C: pleasant. Heat plays no part this month.
Hot days reach at least 30 °C; a month counts as muggy when the mean dew point reaches 18 °C on at least 15 days. Averages from ERA5 and ERA5-Land, 1996–2025. Muggy nights through the year
Snow in İzmit
Snow is possible in İzmit, but no month makes it likely: the chance of seeing snow during a week's stay, the days with fresh snow and how much falls. Tap a month to select it.
Snow calendar
- hardly any
- possible
- likely
- very likely
In October, it hardly ever snows in İzmit.
Snow days bring at least 1 cm of fresh snow. Fresh snow comes from ERA5 snowfall (1996–2025) at the height of the place, not on the slopes above it; the snow chance also weighs whether the snow settles. An estimate from climate averages, not a snow report.
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Nights and sleep in İzmit
How warm the nights get in each month, from the mean night-time low. Tap a month for details.
- Cold 0–8°
- Cool 8–15°
- Pleasant 15–20°
- Warm 20–24°
- muggy month (10+ muggy days)
CoolOctober: nights around 13°. A duvet at night and a jumper for the evening.
The coolest nights are in January (2°), the warmest in August (20°). Tropical nights of 20 °C and more are the rule in August; then air conditioning or a fan helps you sleep. Nights are pleasant for sleeping (15 to 20 °C) from June to July and in September. Nights fall below 8 °C on average from December to March, so the room should be heated. It is muggy (dew point 18 °C or more) on about 51 days a year, mostly from July to August.
Temperatures through the year
Average daytime high, night-time low and sea temperature per month.
| Month | Score | Day | Night | Sea | Sun | Rain days | Rain mm |
|---|---|---|---|---|---|---|---|
| JanuaryJan | 16 | 9° | 2° | 9.0° | 2.3 h | 13 | 91 |
| FebruaryFeb | 24 | 11° | 2° | 7.6° | 3.0 h | 13 | 83 |
| MarchMar | 40 | 13° | 4° | 8.1° | 4.0 h | 13 | 85 |
| AprilApr | 74 | 18° | 8° | 10.6° | 5.9 h | 11 | 64 |
| MayMay | 84 | 22° | 13° | 15.6° | 7.0 h | 9 | 55 |
| JuneJun | 90 | 26° | 17° | 21.2° | 8.6 h | 8 | 53 |
| JulyJul | 88 | 28° | 19° | 24.3° | 9.3 h | 5 | 34 |
| AugustAug | 85 | 29° | 20° | 25.2° | 8.6 h | 6 | 36 |
| SeptemberSep | 84 | 25° | 17° | 23.1° | 6.8 h | 8 | 60 |
| OctoberOct | 71 | 20° | 13° | 19.5° | 4.4 h | 10 | 84 |
| NovemberNov | 61 | 16° | 8° | 15.5° | 3.4 h | 9 | 65 |
| DecemberDec | 27 | 11° | 4° | 11.7° | 2.4 h | 13 | 97 |
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences
40.76° N, 29.93° E · 19 m · Europe/Istanbul
Best time to visit İzmit
The best time to visit İzmit is from May to September. For a beach holiday with the sea above 21 °C, go from June to September. For sightseeing, day trips and hiking, conditions are most comfortable from April to June and from September to November. Rain is most frequent from December to March; the wettest month is December with 97 mm.
İzmit through the seasons
How the weather changes over the seasons, with averages for each.
İzmit in spring
Mar – May
Good
- 13–22 °C by day
- Sea 11 °C
- 6 h of sun a day
- 33 rainy days in all
İzmit in summer
Jun – Aug
Excellent
- 26–29 °C by day
- Sea 24 °C
- 9 h of sun a day
- 19 rainy days in all
İzmit in autumn
Sep – Nov
Good
- 16–25 °C by day
- Sea 19 °C
- 5 h of sun a day
- 28 rainy days in all
İzmit in winter
Dec – Feb
Poor
- 9–11 °C by day
- Sea 9 °C
- 3 h of sun a day
- 39 rainy days in all
Find your perfect month
Tell us what you like and we rate every month in İzmit for you.
Your best months: May – June, September
Based on the climate averages; tap a month to see its details.
Compare two months in İzmit
Pick two months to see how the weather differs. A tick marks the clearly better value; for temperatures it depends on your plans.
June has the better holiday weather in İzmit: score 90 against 71. In June, days are 6 °C warmer than in October. The sea is 2 °C warmer in June. June has 2 fewer rainy days. The sun shines 4 hours longer a day in June.
| Month | October | June |
|---|---|---|
| Weather score | 71 | 90better |
| Day high | 20° | 26° |
| Night low | 13° | 17° |
| Sea | 19.5° | 21.2° |
| Sunshine | 4.4 h | 8.6 hbetter |
| Rainy days | 10 | 8better |
| Rainfall | 84 mm | 53 mmbetter |
| Muggy days | 0better | 8 |
Based on the climate averages 1996–2025.
Which month for what?
Beach & swimming
Jun – Sep
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
Apr – Jun, Sep – Nov
15–28 °C and not too much rain
Rainy months
Dec – Mar
12 or more rainy days
Snow
Jan – Feb
Snow on 2 or more days
İzmit month by month
The typical weather for every month at a glance.
16January9° · Sea 9° · 2 h
In January, İzmit is cold: daytime highs average 9 °C, and nights cool down to about 2 °C. The sea averages 9.0 °C – swimming is only for the hardy. The sun is scarce, with only about 2 hours a day. Rain is frequent, with about 13 rainy days and 91 mm in total. Snow falls on about 3 days. All in all, January is not an ideal month for a holiday in İzmit.
İzmit in January24February11° · Sea 8° · 3 h
In February, İzmit is cool: daytime highs average 11 °C, and nights cool down to about 2 °C. The sea averages 7.6 °C – swimming is only for the hardy. The sun is scarce, with only about 3 hours a day. Rain is frequent, with about 13 rainy days and 83 mm in total. Snow falls on about 3 days. All in all, February is not an ideal month for a holiday in İzmit.
İzmit in February40March13° · Sea 8° · 4 h
In March, İzmit is cool: daytime highs average 13 °C, and nights cool down to about 4 °C. The sea averages 8.1 °C – swimming is only for the hardy. Expect around 4 hours of sunshine a day. Rain is frequent, with about 13 rainy days and 85 mm in total. All in all, March is a so-so month for a holiday in İzmit.
İzmit in March74April18° · Sea 11° · 6 h
In April, İzmit is mild: daytime highs average 18 °C, and nights cool down to about 8 °C. The sea averages 10.6 °C – swimming is only for the hardy. Expect around 6 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 64 mm in total. All in all, April is a good month for a holiday in İzmit.
İzmit in April84May22° · Sea 16° · 7 h
In May, İzmit is warm: daytime highs average 22 °C, and nights cool down to about 13 °C. The sea averages 15.6 °C – swimming is only for the hardy. The sun shines for around 7 hours a day. Rain falls on about 9 days, adding up to 55 mm. All in all, May is an excellent month for a holiday in İzmit.
İzmit in May90June26° · Sea 21° · 9 h
In June, İzmit is warm: daytime highs average 26 °C, and nights cool down to about 17 °C. The sea averages 21.2 °C – refreshing for a swim. The sun shines for around 9 hours a day. Rain falls on about 8 days, adding up to 53 mm. All in all, June is an excellent month for a holiday in İzmit.
İzmit in June88July28° · Sea 24° · 9 h
In July, İzmit is hot: daytime highs average 28 °C, and nights cool down to about 19 °C. The sea averages 24.3 °C – pleasant for swimming. With around 9 hours of sunshine a day, there is plenty of sun. Rain falls on about 5 days, adding up to 34 mm. On about 8 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, July is an excellent month for a holiday in İzmit.
İzmit in July85August29° · Sea 25° · 9 h
In August, İzmit is hot: daytime highs average 29 °C, and even at night it stays warm at around 20 °C. The sea averages 25.2 °C – pleasant for swimming. The sun shines for around 9 hours a day. Rain falls on about 6 days, adding up to 36 mm. On about 9 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, August is an excellent month for a holiday in İzmit.
İzmit in August84September25° · Sea 23° · 7 h
In September, İzmit is warm: daytime highs average 25 °C, and nights cool down to about 17 °C. The sea averages 23.1 °C – pleasant for swimming. The sun shines for around 7 hours a day. Rain falls on about 8 days, adding up to 60 mm. All in all, September is an excellent month for a holiday in İzmit.
İzmit in September71October20° · Sea 20° · 4 h
In October, İzmit is mild: daytime highs average 20 °C, and nights cool down to about 13 °C. The sea averages 19.5 °C – bracing, so a wetsuit helps for longer swims. Expect around 4 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 84 mm in total. All in all, October is a good month for a holiday in İzmit.
İzmit in October61November16° · Sea 16° · 3 h
In November, İzmit is mild: daytime highs average 16 °C, and nights cool down to about 8 °C. The sea averages 15.5 °C – swimming is only for the hardy. The sun is scarce, with only about 3 hours a day. Rain is frequent, with about 9 rainy days and 65 mm in total. All in all, November is a good month for a holiday in İzmit.
İzmit in November27December11° · Sea 12° · 2 h
In December, İzmit is cool: daytime highs average 11 °C, and nights cool down to about 4 °C. The sea averages 11.7 °C – swimming is only for the hardy. The sun is scarce, with only about 2 hours a day. Rain is frequent, with about 13 rainy days and 97 mm in total. All in all, December is not an ideal month for a holiday in İzmit.
İzmit in Decemberİzmit compared
Put İzmit side by side with another destination.
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İzmit vs. Istanbul
In October Istanbul has the better holiday weather (score 76 vs. 71). During the day Istanbul is 1 °C cooler than İzmit. The sea in Istanbul is 1 °C cooler. Istanbul gets one more hour of sunshine a day.
| in October | İzmit | Istanbul |
|---|---|---|
| Holiday score | 71 | 76 |
| Daytime high | 20° | 19° |
| Sea | 20° | 19° |
| Sunshine | 4 h | 5 h |
| Rainy days | 10 | 9 |
| Best time | May – Sep | May – Sep |
Through the year
Turkey in October: the best places
In October, İzmit ranks 26 among the 31 nearest destinations in this country.
- Mersin24°26°95
- 2Belek26°25°94
- 3Fethiye26°24°94
- 4Alanya24°26°94
- 5Ephesus25°93
- 6Side25°25°93
- 7Sardis24°92
- 8Pamukkale25°92
- 26İzmitThis page20°20°71
Planning a trip to İzmit
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
İzmit in the school holidays
How the weather suits the usual holiday periods. Dates vary by school and region, so each holiday uses the months it usually falls in.
İzmit has its best school-holiday weather during the summer holidays (score 86) and its weakest during the Christmas holidays (score 22).
- 64
Easter holidays
Mar – Apr
Good
- 17 °C by day
- Sea 10 °C
- 5.3 h of sun a day
- 12 rainy days a month
Keep in mind: Frequent rain
- 85
May half-term
May – Jun
Excellent
- 23 °C by day
- Sea 17 °C
- 7.3 h of sun a day
- 8 rainy days a month
Good for: Sightseeing & walks
- 86
Summer holidays
Jul – Aug
ExcellentBest holidays
- 29 °C by day
- Sea 25 °C
- 8.8 h of sun a day
- 6 rainy days a month
Good for: Beach & swimming
- 71
October half-term
Oct
Good
- 20 °C by day
- Sea 20 °C
- 4.4 h of sun a day
- 10 rainy days a month
Good for: Sightseeing & walks
- 22
Christmas holidays
Dec – Jan
Poor
- 10 °C by day
- Sea 10 °C
- 2.3 h of sun a day
- 13 rainy days a month
Keep in mind: Frequent rain, Snow
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- about 3 h 40 min
- Distance
- 2,600 km
- Time zone
- UTC+3
- Jet lag
- Hardly any (under 3 h)
Estimated from the straight-line distance: 30 minutes for take-off and landing plus 830 km/h cruising speed.
Frequently asked questions about İzmit
When is the best time to visit İzmit?
The best time to visit İzmit is from May to September. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
How warm is the sea in İzmit?
The sea temperature in İzmit ranges from 7.6 °C in February to 25.2 °C in August. It is warm enough for a comfortable swim (20 °C and more) from June to September.
Can you swim in İzmit in October?
Only if you don't mind cold water: in October the sea averages just 19.5 °C. Comfortable swimming is possible from June to September.
What is the warmest month in İzmit?
August is the warmest month, with average highs of 29 °C and nights around 20 °C. January is the coolest month at 9 °C.
When does it rain most in İzmit?
Rain is most frequent from December to March; the wettest month is December with 97 mm. The driest month is July with 34 mm.
How many hours of sunshine does İzmit get?
İzmit gets around 2,000 hours of sunshine a year. The sunniest month is July with 9.3 hours a day; in January there are 2.3 hours a day.
What time zone is İzmit in?
İzmit uses the time zone Europe/Istanbul, at UTC+3 all year.
How long is the flight from London to İzmit?
A nonstop flight from London to İzmit takes about 3 h 40 min, for a straight-line distance of about 2,600 km.
Which school holidays are best for İzmit?
İzmit has its best school-holiday weather during the summer holidays (score 86) and its weakest during the Christmas holidays (score 22). Holiday ratings (0–100): Easter holidays 64, May half-term 85, Summer holidays 86, October half-term 71, Christmas holidays 22.
Near İzmit
Other destinations close by.
Places with a climate like İzmit
Destinations whose weather through the year is closest to İzmit's – good alternatives.