The breed is loyal, diligent and attentive, with a strong drive to work and a herding instinct. It tends to be reserved and watchful with strangers, and it is closely attached to its own family.
It is a sturdy, athletic dog, a little longer than it is tall, with a woolly, curly single coat that forms cords as it grows. The coat comes in solid black, brown or white, or in white combined with black or brown. Unusually, owners do not brush the coat. Instead they clip it evenly all over, much as a sheep is shorn, and the breed standard says it should never be trimmed into a shape for looks. Some puppies are born with a naturally short tail.
The Spanish Water Dog lasted into the late twentieth century as a working dog rather than a show breed. Goatherds in Andalusia kept it, and so did fishermen on the northern coast, who used it to fetch ropes and objects from the water. In the nineteen-seventies, enthusiasts began collecting dogs from the Andalusian countryside to preserve the type. The Spanish kennel club recognised the breed in the following decade, and it later spread to other countries.