Google's September 2026 spam update is complete after 13 days 16 hours

Google's September 2026 spam update finished rolling out on 8 October 2026, 13 days and 16 hours after it started on 24 September. Google posted the completion note on its Google Search Status Dashboard at 01:37 PDT, stating, "The rollout was complete as of October 8, 2026." That makes it by far the longest of the four spam updates Google has run in 2026, and it gives site owners a fixed two-week window to check in Search Console.

What is new since the launch

Relevant Audience covered the launch on 25 September, when the only facts available were Google's announcement and its estimate. At that point Google had said the update "applies globally and to all languages" and that the rollout "may take up to two weeks to complete." Two weeks later, four things have changed.

• The end date is confirmed. The Status Dashboard incident now shows the update beginning at 09:15 PDT on 24 September 2026 and ending at 01:00 PDT on 8 October 2026.
• The final duration is known. Google's ranking update history lists it at 13 days and 16 hours, which is almost the full two weeks Google allowed for.
• Early third-party impact data exists. Search Engine Journal reported figures from the analytics company Diib, and Search Engine Roundtable logged the update's impact dates.
• A measurement warning has surfaced. The rank-tracking company SEOmonitor said many rank trackers showed sudden ranking changes from 26 September that real searchers did not see.

What has not changed: Google still has not said what this update targeted or why it ran so much longer than the spam updates earlier this year.

How the duration compares with earlier spam updates

The table below sets the September 2026 rollout against Google's previous spam updates, using durations reported by Search Engine Journal and Google's ranking update history.

So the September update was roughly five times longer than any of 2026's other spam updates, but still only half as long as the August 2025 spam update. Barry Schwartz of Search Engine Roundtable pointed out that the previous few spam updates took about two days, while this one took two weeks. Google described it on LinkedIn as "a normal spam update" that would roll out for all languages and locations. Schwartz said he was not sure why a two-week rollout counted as normal. Google has given no explanation, and the length of a rollout on its own does not tell you how many sites were affected.

What Google has and has not said about the target

Google's documentation describes a spam update as a notable improvement to the automated systems it uses to detect spam, including SpamBrain, its AI-based spam-prevention system. Those systems run all the time; a named spam update marks a change to how they work. According to Search Engine Journal, as of publication neither the documentation page nor the two dashboard notes said what the September rollout addressed.

Search Engine Roundtable summarised what it understood about the update: it targets sites that violate some of Google's spam policies, it does not target link spam, it is global, and Google would not say what percentage of queries were affected. Google's general guidance applies to anyone hit: review the spam policies and make sure the site complies. Google's documentation says that changes may help a site improve "over a period of months" as its automated systems learn that the site complies. Recovery is not quick, and there is no reconsideration request for an algorithmic spam update, because no manual action is involved.

Early impact data, and who it comes from

None of the figures in this section come from Google. Google has not confirmed any impact data for this update.

Diib: share of visits from unpaid Google search

Search Engine Journal reported that Diib published early data on 29 September covering 32,569 websites with Google Analytics connected. Diib compared each site's share of visits from unpaid Google search on 24 to 26 September with the same days one week earlier. The median share fell from 34% to 31%. Ten percent of sites saw that share fall by half or more, compared with 5% in the comparison week. Diib said it used a share metric because overall traffic dropped that week, called the findings "an early read, not a verdict," and noted that its data does not show which sites Google classified as spam.

Two limits are worth keeping in mind. The window is only three days at the very start of a fourteen-day rollout. And a share metric can move when other channels change, even if Google traffic holds steady.

Search Engine Roundtable: the impact dates

Schwartz documented the impact dates of the rollout: 25 to 27 September, 30 September, and 4 to 6 October. He added that this assumes Google ran no other updates during the same period, which he said he did not know for sure. He also wrote that some people described the impact as more like a core update, and that he was not sure about that.

SEOmonitor: a rank-tracker artefact

SEOmonitor, as reported by Search Engine Journal, said many rank trackers across the industry showed sudden ranking changes starting on 26 September that people searching on Google did not see. It attributed this to incomplete and incorrect results that Google returned to automated searches. SEOmonitor noted that genuine spam-update changes usually hold for several days and tend to show up in Search Console impressions and clicks.

This matters because 26 September falls inside the first impact window Schwartz logged. A drop on a third-party chart that starts that day and does not appear in Search Console may be a tracking problem rather than a ranking loss.

A separate signal: more manual actions, reported by consultants

On 8 October, Search Engine Roundtable published a separate report asking whether Google is issuing more manual actions. The SEO consultant Marie Haynes posted that her requests for help with manual actions "went from essentially no requests to several per week," covering thin content, pure spam and scaled content. Daniel Foley Carter, another SEO consultant, posted that he has been seeing more manual actions over the last few months. Schwartz also listed recent threads in Google's help forums about manual actions.

Treat this as anecdote. These are reports from individual consultants and forum posts, not data, and Google has not confirmed any change in the volume of manual actions. A manual action is also a different mechanism from a spam update: it is applied by a human reviewer, it appears in the Manual actions report in Search Console, and it can be appealed through a reconsideration request. A spam update is algorithmic and leaves no notice.

How to check whether your site was affected

With the rollout finished, 24 September to 8 October 2026 is a fixed window you can use. Search Engine Journal cautioned that a dip during this period does not automatically mean the update caused it. A practical order of checks:

1. Start in Search Console, not in a rank tracker. Open the Performance report and compare clicks and impressions for 24 September to 8 October with the two weeks before. Then look at the days after 8 October as data comes in.
2. Look for a drop that holds. A decline that lasts several days and appears in both impressions and clicks carries more weight than a one-day dip on a third-party chart. If the only evidence is a rank tracker showing a fall from 26 September, cross-check before acting.
3. Line drops up against the logged dates. If your losses started on 25 to 27 September, 30 September or 4 to 6 October, the timing is consistent with the update. Consistent timing is not proof.
4. Segment by page type. If the losses sit in one directory, such as a blog section built from templated or mass-produced pages, that tells you where to look.
5. Check the Manual actions report. It takes a minute and rules out the other mechanism.
6. Compare with other channels. If direct, paid and social traffic also fell in the same week, a share-of-traffic drop may not be about Google at all. Diib noted that overall traffic decreased that week.

If a site was hit, the work is a review against Google's spam policies, with particular attention to scaled content abuse (many pages produced mainly to rank, whether by people, automation or AI), site reputation abuse (third-party pages hosted to exploit the host site's ranking signals), thin affiliate pages and doorway pages. A structured SEO audit that inventories page types and their traffic is the usual starting point, because the fix often involves removing or consolidating large groups of URLs rather than editing single pages.

What this means for Thai marketers

Google said the update applies globally and to all languages, so Thai-language sites were in scope. Google did not publish any country or language breakdown, and none of the third-party data above is specific to Thailand. The reasoning below is ours, not the sources'.

Thai sites that have published large numbers of near-identical pages, such as programmatic location pages, AI-written articles at volume, or product pages with only the name changed, are the group most worth checking, because that pattern matches the spam policies on scaled content. The same applies to Thai publishers that host third-party sections, like coupon or loan comparison pages run by a partner, which can fall under the site reputation abuse policy.

For agencies and in-house teams reporting to management, the rank-tracker warning is useful. If a monthly report shows a sudden fall in tracked positions from late September, confirm it in Search Console before telling a client or a board that the site was penalised. For a broader view of how to build durable organic visibility in Thailand, see our SEO services in Thailand.

Frequently asked questions

When did the Google September 2026 spam update finish?

It finished on 8 October 2026, according to Google's Search Status Dashboard. The incident is listed as ending at 01:00 PDT that day, and Google posted the completion note at 01:37 PDT. It started on 24 September 2026 at 09:15 PDT.

How long did the rollout take?

Google's ranking update history lists the rollout at 13 days and 16 hours. Search Engine Journal noted that 2026's earlier spam updates took between 19 hours 30 minutes and 2 days 16 hours, Google's ranking update history lists the August 2025 spam update at 26 days 15 hours.

Did Google say what this spam update targeted?

No, Google did not say what the September 2026 spam update targeted or why it took longer. It called it "a normal spam update" on LinkedIn, and its documentation describes spam updates in general terms as improvements to automated spam detection.

My rank tracker shows a big drop from 26 September. Was I hit?

Not necessarily, so check Search Console before concluding anything. SEOmonitor said many rank trackers showed sudden ranking changes from 26 September that real users did not see, caused by incomplete results Google returned to automated queries. A drop that holds for several days in Search Console clicks and impressions is the stronger signal.

Was this update live in Thailand and for Thai-language sites?

Yes, Google said the September 2026 spam update applied globally and to all languages, which includes Thailand and Thai. Google did not publish any data on how much any particular country or language was affected.

The bottom line

The September 2026 spam update is done, it took 13 days and 16 hours, and Google has still not explained what it targeted. The third-party data points to real movement but is early and partial, and at least some of the drops on rank-tracking dashboards were not real. Use 24 September to 8 October as the window, trust Search Console over third-party charts, and review page types against the spam policies if the losses hold. If you would like a second pair of eyes on a traffic drop from this window, the Relevant Audience SEO team can help you work out whether the update is the cause.