The honest answer to when you should fly Casablanca to Bilbao is mostly about weather and demand at the far end. On three years of daily observations at the arrival airport, Jun-Sep gives the most comfortable combination of temperature and rainfall in Bilbao.
Averages below come from three full years of daily readings at Bilbao’s main airport, not from a seasonal generalisation. The warmest month is August (average high 26°C), the coolest is January (average low 6°C), and the wettest is November (181 mm).
| Month | Avg high | Avg low | Rainfall | Wet days | Casablanca high |
|---|---|---|---|---|---|
| January | 14°C | 6°C | 133 mm | 16 | 19°C |
| February | 16°C | 8°C | 150 mm | 17 | 20°C |
| March | 16°C | 8°C | 135 mm | 18 | 20°C |
| April | 18°C | 10°C | 86 mm | 12 | 24°C |
| May | 20°C | 12°C | 130 mm | 17 | 27°C |
| June good | 24°C | 16°C | 56 mm | 10 | 29°C |
| July good | 25°C | 17°C | 49 mm | 10 | 32°C |
| August good | 26°C | 18°C | 74 mm | 10 | 33°C |
| September good | 23°C | 15°C | 116 mm | 14 | 29°C |
| October | 22°C | 13°C | 123 mm | 14 | 28°C |
| November | 17°C | 10°C | 181 mm | 14 | 24°C |
| December | 14°C | 7°C | 144 mm | 16 | 19°C |
Climate data: Open-Meteo reanalysis archive.
Bilbao runs 1 hour ahead of Casablanca. Travelling east is the harder direction to adjust to, so if the trip is short, an early departure that lands in daylight is worth more than a marginally cheaper overnight.
We publish observed fares for this route when we have them, and say nothing when we do not — there is no estimate on this page. What holds regardless of the route:
Midweek departures are consistently cheaper than Friday and Sunday on most routes, because that is where demand sits rather than because of any pricing trick. Where we have observed fares for Casablanca–Bilbao, the weekday breakdown appears further down this page; where we do not, we leave it out rather than estimate it.
Top-rated tours and experiences in Bilbao, ranked by traveller rating. Prices are per person and change with date and group size.
Nightly rates in Bilbao for a sample two-night stay for two adults from 29 Sep 2026, cheapest first. Rates move with your dates — check availability for a live quote.
