Flights from Londonderry Eglinton to Santander have been viewed 20 times in the past calendar month.
When travelling, it's generally smart to pack in preparation for rain or any other conditions that may arise. The rainfall in Derry is roughly less than Santander. You can assume this to be the case over the next 1 days.
Expect the weather to be around 24 °C on average in August. As the temperature peaks, try to get your plans done early, as flight price and availability will have an impact on your travels. The climate in Santander is generally hotter than in Derry.