When to visit
Cardiff?

Discover the best time of year, based on historical climate, temperature, and precipitation.

Cardiff

Wales · Britain

The best weather in Cardiff is from June, July, August. — consistent weather climate

Climate score

October

Mixed climate

🌦Cool & rainy

Temperature

9–15°C

Cold nights — bring layers

Feels like

7–12°C

Dry

Precipitation

138mm

Moderate rain · 17 days

Sunshine

5.3h

Mostly cloudy

Humidity (%)

85%

Dry

Annual Climate Analysis

Temperature, Rain & Feels Like

Rain

Actual Temp

Feels Like

International eSIM

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Flights to Cardiff

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Monthly Overview


Score	9	11	18	40	60	81	79	77	69	40	19	7
Climate	Cold	Cold	Cold	Cold	Mild	Mild	Mild	Cool & rainy	Cool & rainy	Cool & rainy	Cold	Cold
Temperature	3–8°C	3–9°C	4–10°C	5–13°C	9–16°C	12–19°C	13–20°C	13–20°C	11–18°C	9–15°C	6–11°C	5–9°C
Feels like	-1–4°C	-1–5°C	0–6°C	2–10°C	6–14°C	10–18°C	12–20°C	12–19°C	10–17°C	7–12°C	3–8°C	1–6°C
Precipitation	102mm 15 days	106mm 15 days	107mm 17 days	66mm 11 days	83mm 13 days	66mm 13 days	86mm 15 days	101mm 16 days	105mm 15 days	138mm 17 days	112mm 16 days	143mm 18 days
Sunshine	3.5h ☀︎ 42%	4.6h ☀︎ 46%	6.1h ☀︎ 51%	9.4h ☀︎ 68%	10.3h ☀︎ 66%	11.1h ☀︎ 67%	10.7h ☀︎ 67%	9.2h ☀︎ 63%	7.9h ☀︎ 63%	5.3h ☀︎ 50%	3.6h ☀︎ 41%	2.6h ☀︎ 33%
Wind	W · 24 km/h	W · 26 km/h	W · 25 km/h	N · 21 km/h	W · 21 km/h	W · 21 km/h	W · 21 km/h	W · 21 km/h	W · 21 km/h	SW · 22 km/h	W · 24 km/h	SW · 25 km/h
Humidity (%)	87%	84%	81%	76%	77%	76%	77%	80%	82%	85%	87%	89%
Day length	8.4h	10.0h	11.9h	13.9h	15.6h	16.6h	16.1h	14.5h	12.6h	10.7h	8.9h	7.9h

Events & Festivals

Six Nations Rugbysports
February, March· 50k+ visitors
When Wales play home matches in the Six Nations Championship, Cardiff turns into a sea of red as tens of thousands of fa…
St David's Dayholiday
March· 5k+ visitors
On March 1, Cardiff marks Wales's national day with a parade through the city center, daffodil and leek displays, and We…
Cardiff Winter Wonderlandfestival
November, December· 50k+ visitors
From mid-November through December, Cardiff Castle grounds and the city center host an ice rink, big wheel, and German-s…
Cardiff Half Marathonsports
October· 5k+ visitors
Held on a Sunday in early October, the Cardiff Half Marathon brings around 25,000 runners through the city center and al…

Cardiff endures its heaviest crowds when the skies are at their darkest and wettest in December, while its most glorious month—June, filled with over eleven hours of sunlit ease—slips past almost unnoticed by outside visitors.

As the capital of Wales, Cardiff has spent the last century reinventing itself from a gruff, coal-exporting industrial giant into a compact, waterside capital anchored by the modern slate-and-glass Senedd and the sprawling grounds of Cardiff Castle right in the city center. Most travelers arrive here chasing Welsh spectacle: roaring rugby crowds pouring down Westgate Street or festive revelers packing the holiday stalls in midwinter. But doing so means walking straight into the dampest, coldest conditions the Bristol Channel can muster. If you want Cardiff at its effortless best, you have to ignore the winter rush and arrive when the city quietly opens up to the sun.

June: The Undisputed Sweet Spot

June is Cardiff's finest hour, and the calendar numbers do not lie. While holiday guides often push late summer, June delivers the highest sunshine tallies of the year, the mildest rain, and astonishingly thin crowds. The air settles around a comfortable nineteen degrees Celsius, warm enough to sit outside along the waterfront without constantly watching the horizon for an incoming squall.

Life in June gravitates toward green expanses and the waterfront. Bute Park, unfurling directly behind the castle walls, fills with office workers lounging on lawns alongside the River Taff. Down in Cardiff Bay, the breeze coming off the barrage carries none of the winter sting, making the walk past the Norwegian Church toward Penarth a genuine pleasure rather than an endurance test. It is the one month where Cardiff feels like a relaxed maritime capital rather than an embattled coastal outpost.

July and August: High Summer on the Waterfront

July and August maintain solid warmth, but they bring two distinct shifts: a sharp rise in visitor numbers and the steady return of Atlantic dampness. While temperatures reach twenty degrees, the humidity rises with them, and August in particular begins to stack up rainfall in soft, persistent drizzles that brush through the city.

Even so, Cardiff handles high summer with easy charm. The covered Victorian and Edwardian arcades that slice through the city center offer dry shelter if a shower sweeps in, while Cardiff Bay stays vibrant with families wandering Roald Dahl Plass. You will encounter noticeably more company at the turnstiles of Cardiff Castle and along the water taxi docks, but the mood remains easygoing and thoroughly Welsh.

September and October: Autumn Swells and Running Shoes

September is an underrated window where the summer warmth lingers just long enough to keep outdoor walks tempting, even as cloud cover thickens. The light begins to slant low across the limestone civic buildings of Cathays Park, and the crowds thin back down to low-season quiet.

By October, the Atlantic reclaims the coast in earnest. This is the wettest stretch of early autumn, with rain sweeping across the Bristol Channel in heavy downpours that make waterproofs essential. Yet the city generates its own momentum. In early October, tens of thousands of runners descend for the Cardiff Half Marathon, pounding a route that loops past the castle and sweeps around Cardiff Bay before finishing in front of City Hall. The atmosphere is buoyant, but plan around wet pavements and raw, blustery afternoons.

November and December: The Great Midwinter Paradox

Here lies the strange reality of Cardiff: December is the busiest month on the calendar, yet objectively the worst time to visit for weather. Daylight collapses to fewer than three hours of pale sunshine a day, temperatures hover in the single digits, and biting rain lashes down with relentless frequency. In terms of comfort, it is Cardiff at its rawest.

Yet visitors pack the city to capacity. The Cardiff Winter Wonderland takes over the castle grounds and civic lawns, spinning big wheels, ice rinks, and timber stalls glowing under canopy lights. Shoppers jam the arcades and high streets, ducking in and out of warm pubs to shake off the cold. If you travel to Cardiff now, do not expect a tranquil sightseeing city; expect an unapologetic midwinter festival fueled by spiced cider and stubborn holiday cheer in the face of driving rain.

January to March: Rugby Fever in the Winter Damp

January is grey, cold, and slow—the holiday glow fades, leaving behind soaked pavements and empty streets. But come February and March, Cardiff shakes off its slumber with an explosion of civic noise. When the Six Nations Championship arrives, Principality Stadium becomes the beating heart of the nation. On home match days, the entire center shuts down for a sea of red jerseys, singing, and wall-to-wall pub gatherings.

Outside of match weekends, early March brings a gentler civic pride for St David's Day on March 1, when children and choirs march through the center with pinned daffodils and leeks. The weather remains stubbornly damp and chilly, rarely climbing past ten degrees, but the cultural warmth inside the civic buildings and museums makes it easy to forgive the grey skies.

April and May: Spring Light Returns

Spring in Cardiff is a quiet awakening. April brings a notable drop in rain volume and a sudden surge in sunshine, jumping to over nine hours a day as daylight stretches out. The trees lining Bute Park burst into leaf, and the paths along the River Taff dry out enough for long, uninterrupted strolls.

May accelerates the process, feeling almost summer-like on clear afternoons. While temperatures remain crisp in the mid-teens, the city is pleasantly quiet, sitting in a calm lull before summer holidaymakers arrive. It is a fantastic window for exploring the outdoor heritage of the area without jostling through tour groups or dodging December downpours.

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