When is kitten season?

Biologically, spring through early fall — cats cycle with daylight, so litters concentrate from March to September. But our marketplace data adds the missing half of the story: cat listings peak in September (1,046, 65% above May's quiet 635), and September kitten listings run double April's. Kittens are born in spring and summer, but they reach the adoption market — weaned and ready — in late summer and fall.

Why do cat listings peak in September instead of spring?

Lag. A kitten born in May isn't weaned and rehoming-ready until roughly 8 to 12 weeks later — July or August — and the season's full crop stacks up through September and October. Shelters feel kitten season as spring intake of newborns; the adoption marketplace feels it as a fall wave of ready-to-go kittens. Same season, two arrival times.

Do dog listings have a season too?

A much milder one. Dog listings swing only 24% between their busiest month (October) and quietest (May), versus 65% for cats — nearly three times flatter. Dogs breed year-round under human management, so their rehoming follows human calendars (moves, holidays) rather than biology. The September cat spike is a genuinely feline phenomenon, which is exactly why we used dogs as the control group.

When is the best time to adopt a kitten?

September through November, if you want maximum choice — that's when the market holds the year's deepest supply of ready kittens, with September double April's. If you want less competition and don't mind fewer options, spring is the counter-cyclical play. And if you're flexible on age, adult cats are plentiful year-round and come with known personalities — the first week home matters far more than the month you chose.

What should I do if my cat has an accidental litter?

Keep the kittens with their mother until at least 8 weeks — earlier separation harms socialization and health — get a vet check and first vaccines, then rehome to individual screened homes with a modest fee rather than 'free to good home' posts. And close the loop: spaying the mother ends the cycle, and fall (after kitten season) is when vet schedules open up. Our accidental-litter guide walks through each step.

How was this data collected?

We grouped all 9,100 cat rehoming listings created on Cruzapet since 2020 by calendar month, with a kitten subset (under 1 year old at listing, by owner-provided birth date) and dog listings as a control group. Aggregating across six years smooths single-year noise; the dog control (three times flatter) rules out platform-growth artifacts as the cause of the September spike. Test accounts were excluded; aggregate counts only. Figures pulled live in July 2026.

A basket of playful kittens on a porch surrounded by autumn leaves

Kitten Season, According to the Data: The Wave Lands in September

Everyone knows kitten season starts in spring. Our 9,100 cat listings tell the part nobody mentions: the adoption market's kitten wave crests in September — 65% above quiet May, with kitten listings running double April's. Born in spring. Ready in fall. Here's the calendar, measured.

By the Cruzapet Data TeamOriginal marketplace dataUpdated August 2026~5 min read

This study is based on Cruzapet's marketplace data: 250,000+ registered members since 2020, 140,000+ pet profiles across 350+ breeds, 265,000+ conversations between adopters and owners, and thousands of successful matches reported. Monthly figures aggregate six years of cat listings.

The short version

September is the busiest month for cat listings — 1,046 vs May's 635, a 65% swing.
Kitten listings in September run 2× April's (459 vs 223).
Fall holds nearly 30% of the cat year: September-November account for 29.4% of all listings.
Dogs barely notice: their seasonal swing is 24% — three times flatter. This is a feline phenomenon.
The mechanism is lag: born March-July, weaned and rehoming-ready 8-12 weeks later.

The cat year, month by month

Cat rehoming listings by calendar month, six years aggregated:

9,100 cat rehoming listings by calendar month, 2020-2026 aggregated. Source: Cruzapet marketplace data, July 2026.

Born in spring, listed in fall

Cats cycle with daylight, so the biology books are right: litters concentrate March through September. But a May kitten isn't ready to leave its mother until 8-12 weeks later — and shouldn't. Add the season's full crop stacking up through late summer and you get the market's real shape: shelters experience kitten season as spring intake of newborns; the rehoming marketplace experiences it as a fall wave of weaned, vaccinated, ready-to-go kittens. Same season — two arrival times, two months apart.

What it means, by reader

Adopting? September through November is maximum-choice season — the year's deepest shelf of kittens near you, with breed kittens riding the same wave. Spring is the counter-cyclical play: fewer options, less competition. Flexible on age? Adult cats — 72.5% of rehomed cats are under 3, in our data — are plentiful in every month and arrive with personalities already on the label. Whatever the month, the first week home matters more than the season.

Facing an accidental litter? You're statistically in the fall queue with everyone else, so start early: 8 weeks minimum with the mother, vet check and first vaccines, then individual screened homes with a modest fee — never "free to good home." Our guide to rehoming cats responsibly covers each step, and spaying the mother ends the annual rerun.

The fall wave is the year's best kitten shelf

Join 250,000+ members on Cruzapet — meet kittens and cats near you, or rehome a litter to screened homes, one by one.

Browse Cats Near You

Methodology

We grouped all 9,100 cat rehoming listings created on Cruzapet since 2020 by calendar month, with a kitten subset (under 1 year at listing, by owner-provided birth date: 280/272/248/223/242/252/273/288/459/376/350/292, January through December) and 55,813 dog listings as a control. Aggregating six years smooths single-year noise, and the dog control — a 24% seasonal swing versus cats' 65% — rules out platform-growth artifacts as the source of the September spike. Test accounts were excluded; aggregate counts only. Figures pulled live in July 2026.

Frequently asked questions

When is kitten season?: Biologically, spring through early fall — cats cycle with daylight, so litters concentrate from March to September. But our marketplace data adds the missing half of the story: cat listings peak in September (1,046, 65% above May's quiet 635), and September kitten listings run double April's. Kittens are born in spring and summer, but they reach the adoption market — weaned and ready — in late summer and fall.
Why do cat listings peak in September instead of spring?: Lag. A kitten born in May isn't weaned and rehoming-ready until roughly 8 to 12 weeks later — July or August — and the season's full crop stacks up through September and October. Shelters feel kitten season as spring intake of newborns; the adoption marketplace feels it as a fall wave of ready-to-go kittens. Same season, two arrival times.
Do dog listings have a season too?: A much milder one. Dog listings swing only 24% between their busiest month (October) and quietest (May), versus 65% for cats — nearly three times flatter. Dogs breed year-round under human management, so their rehoming follows human calendars (moves, holidays) rather than biology. The September cat spike is a genuinely feline phenomenon, which is exactly why we used dogs as the control group.
When is the best time to adopt a kitten?: September through November, if you want maximum choice — that's when the market holds the year's deepest supply of ready kittens, with September double April's. If you want less competition and don't mind fewer options, spring is the counter-cyclical play. And if you're flexible on age, adult cats are plentiful year-round and come with known personalities — the first week home matters far more than the month you chose.
What should I do if my cat has an accidental litter?: Keep the kittens with their mother until at least 8 weeks — earlier separation harms socialization and health — get a vet check and first vaccines, then rehome to individual screened homes with a modest fee rather than 'free to good home' posts. And close the loop: spaying the mother ends the cycle, and fall (after kitten season) is when vet schedules open up. Our accidental-litter guide walks through each step.
How was this data collected?: We grouped all 9,100 cat rehoming listings created on Cruzapet since 2020 by calendar month, with a kitten subset (under 1 year old at listing, by owner-provided birth date) and dog listings as a control group. Aggregating across six years smooths single-year noise; the dog control (three times flatter) rules out platform-growth artifacts as the cause of the September spike. Test accounts were excluded; aggregate counts only. Figures pulled live in July 2026.

An original data study by the Cruzapet Data Team. Figures pulled live from the marketplace in July 2026; this analysis refreshes annually as new seasons accrue. Journalists and researchers: the aggregated dataset behind this study is available on request. Aggregate counts only — no personal information was analyzed.