Norwegian Forest Cat Growth Chart

The Norwegian Forest cat is among the largest cat breeds. Learn all about their expected growth, from kitten to full-grown feline, in this quick reference guide.

Tara Maurer holding cat smiling

Last Updated: April 23, 2024 | 6 min read

Blue tabby Norwegian Forest female cat laying on ground with grey background.

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Norwegian Forest cats—also called “Skogkatts,” which translates to “forest cats,” are known for their large bodies, thick coats, and playful demeanor. These Viking kitties developed naturally in the forests of Norway, where they were exceptional hunters and could endure long winters and cold temperatures. While not as large as their Maine Coon descendants, the Norwegian Forest cat—”Wegie” for short—is still quite large compared to your standard domestic cat.

Many factors affect the size of an individual feline, including genetics, nutrition, lifestyle, and overall health. Still, it’s good to understand how big your kitty will grow. Large breeds like the Norwegian Forest cat tend to mature much slower than other breeds, so knowing which milestones to look for is one way to ensure your pet’s health.

This guide looks at monthly growth expectations for your kitten’s first year and includes an easy-to-reference growth chart. I discuss what to expect from your adult Norwegian Forest cat and what factors affect their growth.

Norwegian Forest Cat Size: What To Expect

Norwegian Forest cat walking outside in snow.
Norwegian Forest cats are known for their long, luscious coats to keep them warm.

The Skogkatt is a medium-to-large-sized cat with a long, muscular body, thick neck, and triangular head. These felines have thick, semi-long coats with a woolly undercoat. Like other large breeds, the Wegie is very slow maturing, with full growth around five years of age.

Generally, you can expect your kitten to gain around one pound per month until around nine months of age. While Skogkatts can take up to five years to fully mature, they won’t necessarily gain significant weight during this time. Still, you might notice some changes.

The Wegie’s ideal weight is based on a combination of biological and physical factors, so it’s best to work with your veterinary team to determine a target weight for your pet based on their specific needs.

How Big Do Norwegian Forest Cats Get?

The standard Skogkatt has a height of 9″-12″ and a length of 12″-18″. Females are typically 8-18 pounds, while males run slightly larger at 10-20 pounds.

Kitten Growth Timeline

Kittens experience dramatic developmental changes within their first eight weeks of life. Newborn kittens are toothless, with closed eyes and folded ears. At this age, kitties can’t see or hear. They can only navigate the world around them through scent and warmth. Their gums, noses, and paw pads will appear bright pink.

Kittens at this age cannot yet thermoregulate and do not yet have a gag reflex. Their claws will be non-retractable. However, by eight weeks of age, kittens are typically weaned and running and playing like miniature cats.

Because newborn cats are completely dependent on their moms, they typically stay with their litter mates until they are 12 weeks old.

Keep in mind that this information is a guideline to reference, not a prediction of the size your cat will reach. Like humans, kittens can experience growth spurts. Changes in weight and size are normal and unpredictable. Contact your vet for a checkup if you are concerned about your kitty’s growth.

2 Months

By two months, your Skogkatt should be gaining noticeable weight. Kittens are typically around two to four pounds at the end of two months. These kitties are already eating solids and should be given a kitten-specific recipe to aid growth and development.

3 Months

Your Norwegian Forest kitten will typically weigh between three to five pounds at three months. You’ll notice significant growth over the next six months. At this age, kittens should be fully weaned off mom’s milk and be eating a well-balanced kitten food.

4 Months

Expect your Wegie to weigh around five to seven pounds at four months. By then, they should have lost all their baby teeth, making room for adult teeth to pop out.

5 Months

We begin to see size differences between males and females of this breed around five months. Male kitties should weigh around seven to 11 pounds, while females will typically max out at 10 pounds. 

You should also consider a spay or neuter procedure around the five- to six-month mark, which is typically done around this time. study published in the peer-reviewed scientific journal PLOS ONE reported that early-age spaying/neutering results in increased body weight and body fat mass and marked increases in food intake, with these results more apparent in females than male kittens. Your kitten’s body weight should be monitored closely during this growth period to prevent inappropriate weight gain.

6 Months

At six months, your kitten has made substantial growth gains. Both male and female Wegies can weigh up to ten pounds or more at this stage and can even be confused for a full-grown cat. But Wegies are larger than your typical domestic cat and have lots of growing to do.

You may also notice changes in your cat’s coat, affecting their overall appearance. Norwegian Forest kittens can take up to six months of age to develop guard hairs, which are the outer layer that overlay your kitty’s softer undercoat. Guard hairs provide a protective, water-repellent barrier to shield your kitty’s skin against the outdoor elements—rain, snow, and sun.

7 Months

At seven months, Skogkatts may weigh up to 13 pounds. Despite their size, your kitten is still growing. Maintain a kitten-specific diet to aid in continued growth and development.

8 Months

At around eight months, male Wegies weigh 8.5 to 14 poundsFemales may weigh seven to 13 pounds or more.

9 Months

By this point, your kitten has grown to be a large cat. They may even be larger than their adult siblings. Males may weigh nine to 15.5 pounds, and females seven to 14 pounds. 

10 Months

At this age, growth begins to slow, but your cat is still not fully developed. Females typically weigh seven to 15.5 pounds, and males may reach up to 17 pounds. At this point, you can start looking into adult cat food. Consult with your veterinarian for a smooth transition.

11 Months

While quite large, your cat is not yet fully mature. Male Norwegian Forest cats may weigh 9.5 to 17.5 pounds, while females are typically around 7.5 to 16.5 pounds. 

12 Months

Your cat is officially one year old and larger than ever. By 12 months, your Norwegian Forest cat may be up to 19 pounds. Females average 7.5 to 17 pounds, and males average 10 to 19 pounds. Remember, this breed does not fully mature until around five years of age, but changes will be much more gradual.

Adult Norwegian Forest Cats

Red Norwegian Forest cat in the garden outdoors.
Norwegian Forest cats are on the larger size for cats.

Adult Norwegian Forest cats are typically 8-18 pounds, while males grow slightly larger at 10-20 pounds. These cats are super intelligent, clever, and playful. They love to jump and climb, and their long, muscular hind legs allow them to jump high with ease. As an active breed, you’ll want to ensure your feline gets adequate nutrition. Consult your veterinarian if you’re concerned about your adult cat’s weight.

Norwegian Forest Cat Growth Chart

AgeWeight MaleWeight Female
NewbornUnder 6 ouncesUnder 6 ounces
1 Month1.5 lbs1.5 lbs
2 Months2-4 lbs2-4 lbs
3 Months3-5 lbs3-5 lbs
4 Months5-7 lbs5-7 lbs
5 Months7-11 lbs5.5-10 lbs
6 Months7.5-12 lbs6-11 lbs
7 Months8-13 lbs6.5-12 lbs
8 Months8.5-14 lbs7-13 lbs
9 Months9-15.5 lbs7-14 lbs
10 Months9.5-17 lbs7-15.5 lbs
11 Months9.5-17.5 lbs7.5-16.5 lbs
1 Year10-19 lbs7.5-17 lbs
5 Years10-20 lbs8-18 lbs

Factors To Consider

A male Norwegian Forest cat marking his territory.
There are a number of factors that can impact a Norwegian Forest cat’s size.

Keep in mind that all of this information is merely a guideline for growth and milestones. This information does not represent a single cat. How each feline grows will depend on multiple factors.

Activity Level

Physical activity can keep your feline fit and trim; however, a lack of exercise can lead to weight gain and obesity.


What and how much you feed your pet plays a significant role in determining their body composition and overall growth.


Genetics is the most significant factor in determining a cat’s size. The size of your cat’s parents will help indicate what size your kitten will be when fully grown.


Various medical conditions can cause weight changes in pets. In addition, certain drugs can cause weight gain in pets.

Spay/Neuter Status

Cats that are spayed or neutered may experience hormonal changes that affect metabolism and can cause weight gain.

Frequently Asked Questions

Norwegian Forest Cat in forest.
Norwegian Forest cats grow up to be beautiful, majestic creatures.

Here are some questions our readers frequently ask about Norwegian Forest cats. Don’t see yours? Ask us in the comments.

Are Norwegian Forest Cats Bigger Than Maine Coon Cats?

Maine Coons actually grow much larger than Norwegian Forest cats. View our Maine Coon size reference guide to learn more.

What Are The Disadvantages Of A Norwegian Forest Cat?

Like other large breeds, Wegies may fall victim to obesity and other weight-related issues as they age. According to VCA Animal Hospitals, felines are considered obese then they are 10-20% above ideal body weight. While generally healthy, you should ensure your cat remains at a healthy weight as they age to avoid health problems like diabetes and joint issues.

Other Large Cat Breeds

Are you interested in learning about other large cat breeds? Read more about popular breeds, like the Savannah and Bengal. There are also lesser-known large cats, like the Cheetoh and Chausie.

Why Trust Love Your Cat

Tara’s goal at Love Your Cat is to provide our readers with the information they need to raise well-adjusted, happy cats. Tara has 20+ years of experience with felines and spends countless hours researching to provide in-depth detail on every topic. She currently lives with two nine-year-old domestic cats, Luna and Lucy. 

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