VacationSelector
Titanic Belfast, Belfast
BelfastTitanic Belfast
A cobbled street of painted houses in Old San Juan, San Juan
San JuanA cobbled street of painted houses in Old San Juan

Photos: Belfast by Nico Kaiser, CC BY 2.0, cropped; San Juan by Mohan Nannapaneni, Pexels License.

Belfast or San Juan?

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 Belfast for

  • getting around
  • day trips
  • prices

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

Choose San Juan for

  • beaches
  • nightlife
  • food and drink

What lies behind each score is written up on San Juan’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. Belfast 20, San Juan 84: San Juan leads by 64 points.
Food & drink. Belfast 50, San Juan 66: San Juan leads by 16 points.
Culture & sights. Belfast 55, San Juan 64: San Juan leads by 9 points.
Nightlife. Belfast 50, San Juan 70: San Juan leads by 20 points.
Nature & outdoors. Belfast and San Juan are level on 74.
Day trips. Belfast 66, San Juan 52: Belfast leads by 14 points.
Good for families. Belfast and San Juan are level on 58.
Getting around. Belfast 62, San Juan 38: Belfast leads by 24 points.
Shopping & style. Belfast 45, San Juan 50: San Juan leads by 5 points.
Affordability. Belfast 48, San Juan 38: Belfast leads by 10 points.
Live music & performing arts. Belfast and San Juan are level on 55.
Wellness & relaxation. Belfast 25, San Juan 40: San Juan leads by 15 points.
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What lies behind each score is written up on the two cities’ own pages: Belfast and San Juan.

Your match

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

Belfast
51match

Wins on getting around and day trips with your weighting.

San Juan
Best match
57match

Wins on beaches and nightlife with your weighting.

What matters to you?

When should you go?

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

Belfast in July

19 °Cdaytime high
12 °Cnight-time low
74 mmrain in the month
5 hsunshine a day
12 °Csea
17 hdaylight a day

San Juan in July

32 °Cdaytime high
25 °Cnight-time low
153 mmrain in the month
9 hsunshine a day
28 °Csea
13 hdaylight a day

Daytime high, °C

0°10°20°30°40°JFMAMJJASOND

Rainfall in the month, mm

050100150200JFMAMJJASOND
BelfastSan Juan

Temperature and rainfall are climate normals, averaged over the years shown. Belfast: 1991-2020 normals, Belfast / Aldergrove Airport (19.4 km from centre). San Juan: 1991-2020 normals, San Juan / Int., Puerto Rico (12.8 km from centre).

Before you go

MeasureBelfastSan Juan
Official languageEnglishSpanish, English
CurrencyPound Sterling (GBP)US Dollar (USD)
SocketsG230 V, 50 HzAB120 V, 60 Hz
Driving sideLeftRight
Time zoneUTC, UTC+1 in summerUTC-4
Emergency number112 or 999911
Elevation3 m3 m
Main airportGeorge Best Belfast City Airport (BHD)4 km from centre25 non-stop destinationsLuis Munoz Marin International Airport (SJU)12 km from centre59 non-stop destinations
Public holidays this year10 days21 days

By the numbers

MeasureBelfastSan Juan
City population345,006342,259
People per km²3,0002,847
Museums within 10 km818
UNESCO World Heritage sites within 50 km11
Swim season, months above 21 °CNone12 months

Where else could you go?

Every comparison below shares a destination with this one, so you can follow Belfast or San Juan 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. 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.