How Big Will My Irish Water Spaniel Get?
Irish Water Spaniels are a large breed that typically weigh 20–30 kg (44–66 lbs) at full size. Large breeds take longer to mature, typically reaching their adult weight around 14–18 months.
Irish Water Spaniel Size at a Glance
Adult Weight
20–30 kg
44–66 lbs
Adult Height
51–61 cm
20–24 in
Size Category
large
Fully Grown By
14–18 mo
Irish Water Spaniel Growth Chart
Irish Water Spaniel Weight by Age
Predict Your Irish Water Spaniel Puppy's Adult Weight
Enter your puppy's current age and weight for a personalized prediction.
Open Weight CalculatorIrish Water Spaniel Growth & Development
Large breeds take longer to mature, typically reaching their adult weight around 14–18 months. They grow rapidly between 3–6 months.
A Irish Water Spaniel's growth rate is fastest in the first 6 months of life. For larger breeds like the Irish Water Spaniel, it's important not to over-feed during the growth phase, as rapid weight gain can put stress on developing joints and bones.
Factors that influence your Irish Water Spaniel's adult size include genetics (parent size), nutrition quality, spay/neuter timing, and overall health. Males typically weigh 10–20% more than females.
Frequently Asked Questions
How big will my Irish Water Spaniel puppy get?
A full-grown Irish Water Spaniel typically weighs between 20–30 kg (44–66 lbs). Males tend to be on the larger end of the range while females are usually smaller.
When do Irish Water Spaniels stop growing?
Large breeds take longer to mature, typically reaching their adult weight around 14–18 months. They grow rapidly between 3–6 months. Individual dogs may reach their full size slightly earlier or later depending on genetics, diet, and overall health.
How much should a Irish Water Spaniel puppy weigh at 12 weeks?
At 12 weeks, a Irish Water Spaniel puppy typically weighs around 7.5–10 kg (17–22 lbs), which is roughly 30–40% of their adult weight.
How can I tell if my Irish Water Spaniel puppy is the right weight?
Compare your puppy's weight to the growth chart above. A healthy Irish Water Spaniel puppy should follow a steady growth curve. If your puppy's weight deviates significantly from the expected range, consult your veterinarian.
Learn More About Irish Water Spaniels
Explore the full breed profile, find name ideas, or check ownership costs.