Quick answer: Google’s September 2026 spam update, announced on September 24 with an unusually long two-week rollout, has now produced three distinct waves of ranking movement: September 25–27, September 30 into October 1, and a third phase between October 4 and 6. Tracking tools logged heavy volatility in each wave, and site owners are reporting sharp traffic losses.
What happened
Most Google spam updates finish in a day or two. This one was different from the start: Google said the September 2026 spam update would take roughly two weeks to roll out. That longer window has played out as a series of separate impact phases rather than one sudden shift.
The first wave of sites appeared to be hit between September 25 and 27. Activity cooled briefly, then flared again on September 30. SEO consultant Glenn Gabe said he received emails from site owners reporting “a huge drop right on 9/30,” which lined up with the second phase. A third wave followed between October 4 and 6, which Search Engine Roundtable described as likely the final phase of the rollout.
What the volatility data shows
Rank trackers including Semrush Sensor, Advanced Web Ranking, Mozcast, Wincher and Serpstat all recorded elevated SERP volatility during the third phase. Forum chatter on WebmasterWorld was largely negative, with some publishers describing steep revenue declines and others noting erratic Google Discover and Google News traffic that spiked and vanished from day to day.
One odd side effect: Reddit’s AI-translated pages, which had lost visibility after earlier updates, surged again in several countries, including Italy, Germany, Brazil and France, during the second wave.
Why it matters
Because the update arrived in waves, a site that looked safe after September 27 may still have been hit on September 30 or October 4–6. Anyone comparing traffic should look at each window separately rather than treating the update as a single event. The update also lands alongside Google’s fresh guidance asking publishers to manually fact-check all AI-generated content, which strongly suggests scaled, low-effort AI content is a major target.
Key facts
- Announced: September 24, 2026
- Expected rollout: About two weeks
- Wave one: September 25–27
- Wave two: September 30 – October 1
- Wave three: October 4–6
- Tools showing volatility: Semrush, AWR, Mozcast, Wincher, Serpstat
What to do now
- Annotate all three date ranges in Google Analytics and Search Console so you can see which wave (if any) affected you.
- Wait for Google to confirm the rollout is complete before drawing conclusions or making large changes.
- Audit pages that lost traffic for scaled or thin content, doorway patterns, scraped material and unreviewed AI text.
- Remember that recovery from a spam update typically takes weeks to months, even after fixes are made.
FAQ
Is the September 2026 spam update finished?
Not officially as of October 6. The third phase (October 4–6) appears to be the last major wave, but the rollout is complete only when Google updates its Search Status Dashboard.
Why did my traffic drop on September 30 and not earlier?
The update rolled out in phases. Many sites that were untouched in the first wave were hit in the second wave on September 30.
Can I recover from a spam update?
Yes, but only after removing the issues that violate Google’s spam policies. Google has said spam-update-related changes typically take one to two weeks to months to be reflected after fixes.
