Weather in Cardiff - 14-day forecast

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

Forecast for the next days in Cardiff

today🌤️ 25°💧 0.2 mm

Thu☀️ 24°💧 0.3 mm

Fri☀️ 26°💧 0.1 mm

Sat☀️ 27°💧 0.6 mm

Sun☁️ 25°💧 0.2 mm

Mon☀️ 23°💧 4.2 mm

Tue☁️ 26°💧 2.4 mm

Wed☁️ 29°💧 1.7 mm

14-day forecast - Cardiff

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

Next 16 days · forecast

23°

around 19° at night · days with rain: 8

Weeks 3-4 · avg for July

21°

around 14° at night · rain chance 49%

Weeks 5-7 · avg for August

20°

around 13° at night · rain chance 61%

The 30 & 45-day outlook for Cardiff: the next 16 days are a numerical forecast updated daily - on average 23° by day and 19° at night. Further out we rely on multi-year climate averages: around 21° in July, and about 20° in August. Forecasts beyond two weeks are indicative only.

Day-by-day forecast for Cardiff

Wednesday8 July 2026

🌤️25°a few clouds

sunrise 05:05 · sunset 21:30 · night 20° · evening 23° · rain 0.18 mm · humidity 61% · wind 6 m/s · clouds 11%

Thursday9 July 2026

☀️24°clear sky

sunrise 05:06 · sunset 21:29 · night 20° · evening 25° · rain 0.33 mm · humidity 57% · wind 4 m/s · clouds 6%

Friday10 July 2026

☀️26°clear sky

sunrise 05:07 · sunset 21:28 · night 23° · evening 30° · rain 0.1 mm · humidity 49% · wind 4 m/s · clouds 3%

Saturday11 July 2026

☀️27°clear sky

sunrise 05:08 · sunset 21:27 · night 22° · evening 28° · rain 0.6 mm · humidity 40% · wind 10 m/s · clouds 6%

Sunday12 July 2026

☁️25°broken clouds

sunrise 05:09 · sunset 21:27 · night 20° · evening 25° · rain 0.21 mm · humidity 42% · wind 10 m/s · clouds 80%

Monday13 July 2026

☀️23°clear sky

sunrise 05:10 · sunset 21:26 · night 22° · evening 27° · rain 4.23 mm · humidity 50% · wind 10 m/s · clouds 9%

Tuesday14 July 2026

☁️26°broken clouds

sunrise 05:12 · sunset 21:25 · night 23° · evening 28° · rain 2.37 mm · humidity 41% · wind 9 m/s · clouds 77%

Wednesday15 July 2026

☁️29°broken clouds

sunrise 05:13 · sunset 21:24 · night 25° · evening 27° · rain 1.74 mm · humidity 32% · wind 10 m/s · clouds 70%

Thursday16 July 2026

🌧️27°moderate rain

sunrise 05:14 · sunset 21:23 · night 18° · evening 23° · rain 8.97 mm · humidity 41% · wind 11 m/s · clouds 94%

Friday17 July 2026

☀️25°clear sky

sunrise 05:15 · sunset 21:22 · night 17° · evening 22° · rain 6.66 mm · humidity 40% · wind 9 m/s · clouds 6%

Saturday18 July 2026

🌤️23°scattered clouds

sunrise 05:16 · sunset 21:21 · night 17° · evening 22° · rain 1.79 mm · humidity 44% · wind 6 m/s · clouds 46%

Sunday19 July 2026

☁️21°overcast clouds

sunrise 05:18 · sunset 21:20 · night 17° · evening 20° · rain 0.63 mm · humidity 38% · wind 6 m/s · clouds 99%

Monday20 July 2026

🌧️20°moderate rain

sunrise 05:19 · sunset 21:18 · night 15° · evening 18° · rain 19.32 mm · humidity 70% · wind 5 m/s · clouds 82%

Tuesday21 July 2026

🌧️18°moderate rain

sunrise 05:20 · sunset 21:17 · night 13° · evening 13° · rain 6.27 mm · humidity 75% · wind 10 m/s · clouds 72%

Wednesday22 July 2026

🌧️17°light rain

sunrise 05:22 · sunset 21:16 · night 13° · evening 17° · rain 0.45 mm · humidity 54% · wind 9 m/s · clouds 91%

Thursday23 July 2026

🌧️16°light rain

sunrise 05:23 · sunset 21:15 · night 14° · evening 14° · rain 0.42 mm · humidity 64% · wind 6 m/s · clouds 100%

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

Today the UV index in Cardiff is 6 (moderate) - unprotected fair skin can burn in about 35 minutes. Seek shade around midday. SPF 30+, sunglasses and a hat for longer stays.

🌿 Pollen in Cardiff - info for allergy sufferers

Today mugwort pollen is highest in Cardiff - about 37 grains/m³, high level. Allergy sufferers should limit time outdoors on dry, windy days and take medication as advised. Pollen levels are a CAMS model forecast and are indicative.

🌊 Sea temperature - Cardiff

Water today

21°C

Week avg

22°C

Waves today

0.2 m

How's the water?

brisk

16-day sea temperature forecast:

8.07 21°C9.07 22°C10.07 22°C11.07 22°C12.07 22°C13.07 22°C14.07 22°C15.07 22°C16.07 22°C

Average sea temperature through the year:

Jan 7°CFeb 7°CMar 8°CApr 11°CMay 15°CJun 18°CJul 20°CAug 20°CSep 18°COct 15°CNov 12°CDec 9°C

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

Air quality and smog in Cardiff

Air quality in Cardiff is currently very good. Fine particulate PM2.5: 6.8 µg/m³, PM10: 9.3 µg/m³.

City	PM2.5 (µg/m³)	PM10 (µg/m³)	Air quality
Stoke-on-Trent	9.2	12.2	very good
Manchester	8.2	11.6	very good
Sheffield	7	9.2	very good
Bristol	7	9.4	very good
Leeds	6.8	10.4	very good
Cardiff	6.8	9.3	very good
Bradford	6.8	9.6	very good
Londyn	6.5	11.8	very good
Liverpool	6.4	9.5	very good
Nottingham	6.3	10.9	very good
Leicester	6.2	11.2	very good
Birmingham	6.1	10.7	very good
Wolverhampton	5.9	10.4	very good
Coventry	5.9	10.6	very good
Belfast	5.7	8.6	very good

Based on PM2.5 thresholds. Station readings, updated daily (last reading: 2026-07-08, 02:00).

Cardiff weather through the year

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

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

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

25 DecemberFriday

Christmas Day

🎈 long weekend

28 DecemberMonday

St. Stephen's Day

🎈 long weekend

26 MarchFriday 2027

Good Friday

🎈 long weekend

3 MayMonday 2027

Early May Bank Holiday

🎈 long weekend

31 MayMonday 2027

Spring Bank Holiday

🎈 long weekend

27 DecemberMonday 2027

Christmas Day

🎈 long weekend

28 DecemberTuesday 2027

St. Stephen's Day

🎈 long weekend + bridge day

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

BristolCoventry

FAQ - Cardiff weather

What is the weather like in Cardiff today?

Today it is about 25° during the day and 20° at night, a few clouds.

How far ahead can I check the forecast for Cardiff?

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.