How reliable is Juanda International Airport?
Month-by-month weather risk and connection guidance for Juanda International Airport. We don’t yet have on-time performance history here — see why below.
Weather favorability
year-round climate
On-time performance data isn’t available for SUB yet
Our historical on-time and cancellation record currently covers the US, UK, Brazil, and Australia, so we don’t score departure reliability at Juanda International Airport yet. Weather climatology below comes from global airport observations and still applies.
Advertisement
Weather by month
When the weather works for you at Surabaya
A calm-weather score (0–100) for each month from decades of airport observations — how often conditions disrupt flying, not temperature. Higher is calmer.
Calmest month
Calmest flying weather of the year · 95/100 favorability
Roughest month
Most disruptive — low visibility & fog, thunderstorms · 87/100 favorability
The read on SUB
What the numbers say about flying through Juanda International Airport
PlaneSane doesn't yet have on-time and cancellation history for Juanda International Airport, so it isn't scored for departure reliability here — that record currently covers the US, UK, Brazil, and Australia. The weather and connection context below comes from separate global sources and still applies.
On weather, Surabaya is an unusually calm-weather airport year-round. September is the calmest stretch for flying, scoring 95 out of 100 for favorable conditions, while March is the most disruptive at 87, driven mainly by low visibility & fog and thunderstorms. The year is relatively steady, so no single month stands out as one to avoid on weather alone.
None of this guarantees your specific flight — it’s the backdrop. To turn it into a booking, score real flights to Surabaya, read how we weigh it all in how the PlaneSane Score works, and brush up with how to pick a reliable flight and avoiding weather delays.
Common questions about SUB
- What is the best month to fly from SUB for good weather?
- September has the calmest flying weather at Juanda International Airport. March is the most disruptive, mainly from low visibility & fog and thunderstorms.
Planning a trip through Surabaya?
Score real flights to and from SUB on reliability, weather, and connection safety — not just price.