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Irish Water Spaniel Growth Chart
The Irish Water Spaniel is the tallest of the spaniels — a clownish, curly-coated water dog with a distinctive topknot, rat-like tail, and a bold, playful character. Smart and mischievous, these are the comedians of the sporting group. Adult males typically weigh 55-68 lb and females 45-58 lb, with most fully grown between 14 and 18 months.
View weight chart (lb & kg)Calculate Your Irish Water Spaniel Puppy's Adult Weight
Enter your Irish Water Spaniel puppy's age and current weight for an estimated adult weight range.
Irish Water Spaniel weight by age
Typical male and female puppy weight ranges by age, available in lb and kg. Individual puppies may vary.
Most Irish Water Spaniel puppies approach adult weight around 18 months, although individuals may finish earlier or later.
These estimated ranges combine the breed's adult weights with a size-based growth curve. They are not measured breed-specific percentiles or health targets. Month labels are rounded approximations; use the week values for each row. How these weight ranges are calculated
Irish Water Spaniel Growth Stages
Understanding the typical growth stages helps you know what to expect as your Irish Water Spaniel puppy grows.
Neonatal
0–2 weeksPuppies are born with eyes and ears closed, relying entirely on their mother. Rapid weight gain occurs during this period.
Socialization
3–12 weeksEyes and ears open. Puppies begin to explore, play, and learn social behaviors. This is a critical period for development.
Juvenile
3–8 monthsRapid growth continues. Puppies become more independent, start teething, and develop coordination.
Adolescent
8–14 monthsGrowth rate begins to slow. Puppies reach sexual maturity and may test boundaries. Muscle mass develops.
Young Adult
14–18 monthsGrowth is nearly complete. Your puppy is filling out and approaching adult proportions.
Adult
18+ monthsYour puppy has reached their full adult size. Weight should remain relatively stable with proper nutrition.
Irish Water Spaniel FAQ
How much will my Irish Water Spaniel puppy weigh as an adult?
Adult Irish Water Spaniels typically weigh between 45 and 68 lb — males 55-68 lb and females 45-58 lb. Males tend to land toward the heavier end of that band.
At what age is an Irish Water Spaniel fully grown?
Most reach adult weight between 14 and 18 months. They grow tall in the first year and then fill out, so a lanky yearling that still looks unfinished is usually right on track.
How accurate is an Irish Water Spaniel puppy weight chart?
It is a helpful guide, but the dense curly coat can hide body condition — feel the ribs rather than trusting the eye. Track your own puppy's trend over several weeks rather than comparing to a single week's number.
How much should an Irish Water Spaniel puppy weigh at 12 weeks?
Check the 12-week row in the weight-by-age table above for the estimated range. If your puppy falls well outside that band, re-check the scale, the lb/kg setting, and the age entry first — a single off reading is more common than a truly unusual puppy.
Do male and female Irish Water Spaniels grow differently?
Yes — the standard gives males at 55-68 lb and females at 45-58 lb, so the chart shows separate rows for each. Use the right row for your puppy's sex.