The temperatures in Castro Urdiales in April are quite cold with temperatures between 9°C and 15°C, warm clothes are a must.
You can expect rain for roughly half of the month of April in Castro Urdiales. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Castro Urdiales in April 2026.
If you’re planning to visit Castro Urdiales in the near future, we highly recommend that you review the 14 day weather forecast for Castro Urdiales before you arrive.
Temperatures
15° / 9°
Rainy Days
8
Snowy Days
0
Dry Days
23
Rainfall
113
mm
Sun Hours
5.6
Hrs
