Weather in Koper - 14-day forecast

Detailed weather forecast for Koper, Slovenia: daytime and night temperature, rain, sunrise and sunset - today and for the next two weeks.

Forecast for the next days in Koper

today☁️ 30°💧 0.6 mm

Thu🌤️ 31°💧 2.8 mm

Fri☀️ 30°💧 1.8 mm

Sat🌧️ 29°💧 1.5 mm

Sun🌧️ 32°💧 0.1 mm

Mon🌧️ 34°💧 0.1 mm

Tue🌧️ 33°💧 0.8 mm

Wed☀️ 32°💧 0.2 mm

⚠️ Weather warnings - Koper

✅ No active weather warnings for Koper (region: Southwest). The national weather service is not forecasting dangerous conditions.

14-day forecast - Koper

📅 Koper 30 & 45-day weather - long-range outlook

Next 16 days · forecast

31°

around 23° at night · days with rain: 9

Weeks 3-4 · avg for July

30°

around 18° at night · rain chance 28%

Weeks 5-7 · avg for August

29°

around 17° at night · rain chance 35%

The 30 & 45-day outlook for Koper: the next 16 days are a numerical forecast updated daily - on average 31° by day and 23° at night. Further out we rely on multi-year climate averages: around 30° in July, and about 29° in August. Forecasts beyond two weeks are indicative only.

Day-by-day forecast for Koper

Wednesday8 July 2026

☁️30°overcast clouds

sunrise 05:24 · sunset 20:55 · night 24° · evening 28° · rain 0.57 mm · humidity 43% · wind 3 m/s · clouds 100%

Thursday9 July 2026

🌤️31°a few clouds

sunrise 05:25 · sunset 20:55 · night 23° · evening 28° · rain 2.76 mm · humidity 35% · wind 4 m/s · clouds 16%

Friday10 July 2026

☀️30°clear sky

sunrise 05:26 · sunset 20:54 · night 23° · evening 28° · rain 1.75 mm · humidity 40% · wind 4 m/s · clouds 8%

Saturday11 July 2026

🌧️29°light rain

sunrise 05:27 · sunset 20:54 · night 23° · evening 25° · rain 1.54 mm · humidity 46% · wind 3 m/s · clouds 98%

Sunday12 July 2026

🌧️32°light rain

sunrise 05:28 · sunset 20:53 · night 23° · evening 27° · rain 0.12 mm · humidity 37% · wind 4 m/s · clouds 39%

Monday13 July 2026

🌧️34°light rain

sunrise 05:28 · sunset 20:53 · night 25° · evening 28° · rain 0.12 mm · humidity 28% · wind 3 m/s · clouds 40%

Tuesday14 July 2026

🌧️33°light rain

sunrise 05:29 · sunset 20:52 · night 23° · evening 25° · rain 0.84 mm · humidity 33% · wind 4 m/s · clouds 1%

Wednesday15 July 2026

☀️32°clear sky

sunrise 05:30 · sunset 20:51 · night 22° · evening 25° · rain 0.18 mm · humidity 32% · wind 4 m/s · clouds 4%

Thursday16 July 2026

🌤️30°a few clouds

sunrise 05:31 · sunset 20:51 · night 23° · evening 26° · rain 2.49 mm · humidity 40% · wind 3 m/s · clouds 24%

Friday17 July 2026

🌧️32°light rain

sunrise 05:32 · sunset 20:50 · night 20° · evening 22° · rain 3.09 mm · humidity 41% · wind 6 m/s · clouds 9%

Saturday18 July 2026

🌧️26°light rain

sunrise 05:33 · sunset 20:49 · night 23° · evening 26° · rain 2.01 mm · humidity 53% · wind 2 m/s · clouds 93%

Sunday19 July 2026

☀️31°clear sky

sunrise 05:34 · sunset 20:48 · night 24° · evening 26° · rain 23.22 mm · humidity 39% · wind 4 m/s · clouds 1%

Monday20 July 2026

☀️33°clear sky

sunrise 05:35 · sunset 20:47 · night 24° · evening 28° · rain 56.94 mm · humidity 29% · wind 4 m/s · clouds 8%

Tuesday21 July 2026

🌧️33°light rain

sunrise 05:36 · sunset 20:46 · night 21° · evening 26° · rain 1.53 mm · humidity 33% · wind 5 m/s · clouds 2%

Wednesday22 July 2026

🌧️29°light rain

sunrise 05:37 · sunset 20:45 · night 23° · evening 26° · rain 0.18 mm · humidity 53% · wind 4 m/s · clouds 11%

Thursday23 July 2026

☀️32°clear sky

sunrise 05:38 · sunset 20:44 · night 26° · evening 26° · humidity 30% · wind 5 m/s · clouds 3%

☀️ UV index in Koper - is it safe to sunbathe?

Today the UV index in Koper is 5 (moderate) - unprotected fair skin can burn in about 40 minutes. Seek shade around midday. SPF 30+, sunglasses and a hat for longer stays.

🌿 Pollen in Koper - info for allergy sufferers

Today grasses pollen is highest in Koper - about 24 grains/m³, moderate level. Most allergy sufferers should not feel strong symptoms. Pollen levels are a CAMS model forecast and are indicative.

🌊 Sea temperature - Koper

Water today

27°C

Week avg

27°C

Waves today

0.1 m

How's the water?

warm

16-day sea temperature forecast:

8.07 27°C9.07 27°C10.07 27°C11.07 27°C12.07 27°C13.07 28°C14.07 28°C15.07 28°C16.07 28°C

Average sea temperature through the year:

Jan 10°CFeb 10°CMar 11°CApr 14°CMay 18°CJun 24°CJul 26°CAug 26°CSep 24°COct 20°CNov 16°CDec 11°C

Sea-surface temperature from marine models, updated daily. See also: where the sea is warmest right now.

Air quality and smog in Koper

City	PM2.5 (µg/m³)	PM10 (µg/m³)	Air quality
Lublana	7.3	10.3	very good

Based on PM2.5 thresholds. Station readings, updated daily (last reading: 2026-07-08, 03:00).

Koper weather through the year

Warmest, driest months on average: April, May, June, July.

🎉 Public holidays in Koper - when are the long weekends?

Next long weekend in Koper: Christmas Day (25 December, Friday) - Friday–Sunday (3 days off).

15 AugustSaturday

Assumption Day

falls on a weekend

31 OctoberSaturday

Reformation Day

falls on a weekend

1 NovemberSunday

Day of the Dead

falls on a weekend

25 DecemberFriday

Christmas Day

🎈 long weekend

26 DecemberSaturday

Independence and Unity Day

falls on a weekend

1 JanuaryFriday 2027

New Year's Day

🎈 long weekend

2 JanuarySaturday 2027

New Year's Day

falls on a weekend

8 FebruaryMonday 2027

Prešeren Day

🎈 long weekend

28 MarchSunday 2027

Easter Sunday

falls on a weekend

29 MarchMonday 2027

Easter Monday

🎈 long weekend

27 AprilTuesday 2027

Day of Uprising Against Occupation

🎈 long weekend + bridge day

1 MaySaturday 2027

Labour Day

falls on a weekend

Public holidays (statutory days off) - shops, offices and some attractions may be closed. A "bridge day" is a workday between a holiday and the weekend worth taking as leave.

Nearby places

PredjamaLjubljanaKranjSmartnoprilitijiVeniceNovo Mesto

FAQ - Koper weather

What is the weather like in Koper today?

Today it is about 30° during the day and 24° at night, overcast clouds.

How far ahead can I check the forecast for Koper?

This page shows a detailed 14-day forecast plus the long-term monthly climate, so you can plan both a short trip and a holiday months ahead.