Wondering how big your Portuguese Water Dog puppy will get? Use the calculator below: enter your puppy’s age and current weight to see a personalized growth curve and an adult weight estimate.
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 Portuguese Water Dog is a medium-sized breed. Adult males typically weigh 42–60 lb (19.1–27.2 kg) and females 35–50 lb (15.9–22.7 kg). Most Portuguese 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 Portuguese Water Dogs stop growing?
Most Portuguese 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 Portuguese Water Dog puppy weigh at 4 months?
A typical 4-month-old Portuguese Water Dog weighs roughly 18–25 lb, about 46% of its adult weight. Use the calculator above with your puppy’s exact weight for a personalized estimate — individual dogs vary.