VacationSelector
Cardiff Castle, Cardiff
CardiffCardiff Castle
The old town on the Neckar, Heidelberg
HeidelbergThe old town on the Neckar

Photos: Cardiff by Tevfik Teker, CC BY 3.0, cropped; Heidelberg by Kuanling Chen, Pexels License.

Cardiff or Heidelberg?

Our verdict in twelve categories, each scored against the same fixed benchmark cities, and the climate month by month, so you can choose for your trip.

Choose Cardiff for

  • beaches
  • nightlife
  • nature and the outdoors

What lies behind each score is written up on Cardiff’s own page.

Choose Heidelberg for

  • wellness
  • day trips
  • getting around

What lies behind each score is written up on Heidelberg’s own page.

Scoreboard

Twelve categories on one fixed scale from 0 to 100. The shaded stretch is the gap between the two.

Beaches & swimming. Cardiff 30, Heidelberg 7: Cardiff leads by 23 points.
Food & drink. Cardiff 45, Heidelberg 40: Cardiff leads by 5 points.
Culture & sights. Cardiff and Heidelberg are level on 58.
Nightlife. Cardiff 50, Heidelberg 38: Cardiff leads by 12 points.
Nature & outdoors. Cardiff 70, Heidelberg 60: Cardiff leads by 10 points.
Day trips. Cardiff 72, Heidelberg 78: Heidelberg leads by 6 points.
Good for families. Cardiff 58, Heidelberg 62: Heidelberg leads by 4 points.
Getting around. Cardiff 66, Heidelberg 72: Heidelberg leads by 6 points.
Shopping & style. Cardiff 50, Heidelberg 40: Cardiff leads by 10 points.
Affordability. Cardiff 46, Heidelberg 42: Cardiff leads by 4 points.
Live music & performing arts. Cardiff 57, Heidelberg 48: Cardiff leads by 9 points.
Wellness & relaxation. Cardiff 27, Heidelberg 44: Heidelberg leads by 17 points.
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What lies behind each score is written up on the two cities’ own pages: Cardiff and Heidelberg.

Your match

Pick a travel style or drag the sliders, and both match scores follow your weighting.

Cardiff
Best match
52match

Wins on beaches and nightlife with your weighting.

Heidelberg
49match

Wins on wellness and day trips with your weighting.

What matters to you?

When should you go?

Pick your month. The climate figures are measured averages, not a forecast.

Cardiff in July

20 °Cdaytime high
13 °Cnight-time low
83 mmrain in the month
7 hsunshine a day
17 °Csea
16 hdaylight a day

Heidelberg in July

26 °Cdaytime high
16 °Cnight-time low
80 mmrain in the month
8 hsunshine a day
No seasea
16 hdaylight a day

Daytime high, °C

0°10°20°30°JFMAMJJASOND

Rainfall in the month, mm

050100150JFMAMJJASOND
CardiffHeidelberg

Where the figures come from

Cardiff has no rain gauge within 25 km of the centre, so its rainfall comes from a gridded climate dataset read at the city rather than from a gauge further away.

Cardiff's sunshine is measured 83 km from the centre, at Lyneham.

Temperature and rainfall are climate normals, averaged over the years shown. Cardiff: 1991-2020 normals, Cardiff-Wales Airport (14.9 km from centre). Heidelberg: 1991-2020 normals, Heidelberg (4.5 km from centre).

Before you go

MeasureCardiffHeidelberg
Official languageEnglishGerman
CurrencyPound Sterling (GBP)Euro (EUR)
SocketsG230 V, 50 HzCF230 V, 50 Hz
Driving sideLeftRight
Time zoneUTC, UTC+1 in summerUTC+1, UTC+2 in summer
Emergency number112 or 999112
Elevation41 m114 m
Main airportCardiff International Airport (CWL)15 km from centre30 non-stop destinationsFrankfurt Main Airport (FRA)69 km from centre281 non-stop destinations
Public holidays this year8 days12 days

By the numbers

MeasureCardiffHeidelberg
City population383,536156,092
People per km²2,7341,433
Museums within 10 km917
UNESCO World Heritage sites within 50 km14
Swim season, months above 21 °CNone-

Where else could you go?

Every comparison below shares a destination with this one, so you can follow Cardiff or Heidelberg somewhere new.

Browse every destination

Sources

Structured data from Wikidata (CC0). Weather data by Meteostat. Meteorological data provided by NOAA, DWD and others. Rainfall where no rain gauge is within 25 km is from the TerraClimate 1991-2020 climatology (Abatzoglou et al. 2018, Scientific Data), read at the city. Sea surface temperature from NOAA OISST v2.1, NOAA Physical Sciences Laboratory. Airport data from OurAirports (public domain). Public holidays from Nager.Date (MIT). Exchange rates via Frankfurter, based on European Central Bank reference rates. Non-stop route lists from the "Airlines and destinations" tables on English Wikipedia airport articles, by Wikipedia contributors, reused under CC BY-SA 4.0. Currency from the ISO 4217 register maintained by SIX, cross-checked against country data from GeoNames (CC BY 4.0). Price level from World Bank open data (PPP conversion factor for private consumption and official exchange rate), CC BY 4.0. Time zones from GeoNames (CC BY 4.0); clock offsets computed from the IANA time zone database. Tourism statistics from Eurostat, © European Union, reused under CC BY 4.0. Daylight hours computed from each destination's latitude using the NOAA solar position algorithm.

Category scores are our editorial verdict under rubric v3, each placed against the same fixed benchmark cities; the climate figures are measured. How the scores are set. Snapshot generated 2026-10-31. Daily budgets are estimates from country price levels.