Google released the September 2026 spam update on September 24, 2026 at 09:15 PDT. It applies globally and to all languages, and Google says the rollout may take up to two weeks (Google Search Status Dashboard). If clicks fell after September 24, compare that window with the week before in Search Console, open the Manual Actions report, and review pages produced at scale against the scaled content abuse policy.
Key facts
- Released: September 24, 2026, 09:15 PDT; global, all languages.
- Rollout window: up to two weeks, which points to about October 8, 2026. As of September 28 the dashboard still lists it as in progress.
- Frequency: the fourth spam update of 2026. The last three ranking updates on the dashboard were all spam updates: June 24, August 18 and September 24 (ranking incident history).
Catch a drop on day one. Muginai pulls Search Console positions daily and checks priority keywords in live Google results, and a drop of 3+ positions triggers a Telegram alert (daily alerts on Pro and Agency) and queues a refresh brief.
Google spam updates in 2026: dates and rollout times
Google shipped spam updates on March 24, June 24, August 18 and September 24, 2026. A spam update is a notable improvement to Google's automated spam-detection systems, such as the AI-based SpamBrain (Google Search Central). Each earlier 2026 spam update finished within three days. Google has not published a list of spam types this update focuses on.
| Update | Start date | Rollout duration |
|---|---|---|
| March 2026 spam update | Mar 24, 2026 | 19 hours 30 minutes |
| June 2026 spam update | Jun 24, 2026 | 2 days 1 hour |
| August 2026 spam update | Aug 18, 2026 | 2 days 16 hours |
| September 2026 spam update | Sep 24, 2026 | In progress, up to 2 weeks |
Source: Google Search Status Dashboard. In 2025 the August spam update ran 26 days, so treat the window as an estimate.
How to check if the spam update hit your site
Your site was likely hit when clicks and average position for a group of pages fell sharply after September 24, 2026, and seasonality or technical errors do not explain it. Five checks narrow it down:
- Compare two windows. For an early read, in Performance → Search results compare the 7 days from September 24 with September 17–23, then open the Pages tab.
- Group the losers. When the drop sits in one template (programmatic pages, AI-drafted posts, scraped listings), review those pages against the spam policies first.
- Open the Manual Actions report. A manual action means a human reviewer found policy violations; after fixes you request a review, and Google says most reviews take several days or weeks (Search Console Help).
- Rule out other causes. Google lists seasonality, technical issues and reporting errors among the main causes of traffic drops (debugging traffic drops).
- Measure after completion. For core updates Google recommends waiting a full week after the rollout ends and comparing it with the week before the start (Google on core updates). We apply the same method to spam updates.
Recovery takes time: Google says fixes may help "if our automated systems learn over a period of months that the site complies with our spam policies." For the wider process across core and spam updates, see our guide to monitoring and recovering from Google algorithm updates.
Why AI content pipelines need a quality gate
An AI pipeline can publish at the volume Google's scaled content abuse policy describes, so every draft needs a value check before it goes live. Scaled content abuse is Google's term for when "many pages are generated for the primary purpose of manipulating search rankings and not helping users," and the policy applies "no matter how it's created." The first example Google lists is "using generative AI tools or other similar tools to generate many pages without adding value for users" (Google spam policies). A pipeline that publishes every draft without checking its value can drift into that pattern, so the quality gate goes before publishing. Full checklist: SEO automation without spam penalties.
In Muginai, each draft passes anti-slop word patterns, cosine similarity against your existing content, source diversity (two or more external domains) and a trigram novelty score, then waits for human approval by default. After publishing, a drop of 3+ positions triggers a Telegram alert and queues a refresh brief. See the content pipeline.
FAQ
When did the Google September 2026 spam update start?
On September 24, 2026 at 09:15 PDT, per the Google Search Status Dashboard. It applies globally, in all languages.
How long will the September 2026 spam update take to roll out?
Google says up to two weeks, which points to around October 8, 2026. Earlier 2026 spam updates finished within 2 days 16 hours.
How do I know if the spam update hit my site?
Compare clicks and average position in Search Console for the week from September 24 against September 17–23, find which page groups lost traffic, and check the Manual Actions report. Confirm with a full week of data after the rollout completes.
Does the spam update target AI-generated content?
Google has not said which spam types this update focuses on. Its scaled content abuse policy covers pages generated at scale mainly to manipulate rankings, however they are made, and lists mass AI generation "without adding value for users" as an example. Google's generative AI guidance calls AI useful for researching a topic and adding structure to original content.
Put a quality gate and daily rank tracking on your pipeline. Plans from $49/month, daily Telegram alerts on Pro and Agency; first month free for waitlist members.