Every Spanish Water Dog grows at its own pace. Enter your puppy’s age and weight below to see where it sits on the breed’s growth curve and what adult size to expect.
Estimates combine your puppy’s current trajectory with typical growth curves for this breed and size class. Individual dogs vary — nutrition, genetics and neuter timing all matter. For health concerns, ask your vet.
The Spanish Water Dog is a medium-sized breed. Adult males typically weigh 40–49 lb (18.1–22.2 kg) and females 31–40 lb (14.1–18.1 kg). Most Spanish Water Dogs reach about half their adult weight around 4.3 months, hit 90% by roughly 9.1 months, and are fully grown near 13 months. A useful rule of thumb for medium breeds: they roughly double their four-month weight.
When do Spanish Water Dogs stop growing?
Most Spanish Water Dogs reach their full adult height and weight by about 13 months. Growth is fastest before 4.3 months, then slows steadily — by 9.1 months your puppy will be about 90% of its final size.
How much should a Spanish Water Dog puppy weigh at 4 months?
A typical 4-month-old Spanish Water Dog weighs roughly 16–20 lb, about 46% of its adult weight. Use the calculator above with your puppy’s exact weight for a personalized estimate — individual dogs vary.