Climate
Semarang logs 223 sunny days a year to Surabaya's 256 — Surabaya wins by 33. Semarang also leads on hot days by 28.
Semarang
Feels-like °C
Dinner outside
Surabaya
Feels-like °C
Dinner outside
Air Quality
Semarang averages 32.2 µg/m³ (unhealthy) PM2.5 annually versus Surabaya's 33.5 µg/m³ (unhealthy) — Semarang breathes ~4% cleaner air (1.3 µg/m³ lower).
Semarang
Surabaya
PM2.5 annual average
WHO classification
City Scale
Both maps at the same real-world scale — 1 cm on either map is the same distance.
Semarang (3.3M) and Surabaya (6.9M) are 2.1x in population — Surabaya is the larger metro, Semarang the smaller; on land area Surabaya spans roughly 2.2x more ground.
Surabaya is roughly 2.1x the scale of Semarang
Combined population & area comparison
SurabayaSemarangCity Scale Rankings
Surabaya6.9M2.1xSemarang3.3M1xSurabaya1,304 km²2.2xSemarang603 km²1xSemarang
Surabaya
Who Thrives Here
Both cities work well for the winter escapist.
Also compared
SingaporeFrequently asked about Semarang vs Surabaya
▶How does the climate compare between Semarang and Surabaya?
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