Google's December 2025 core update began on 11 December 2025 and finished on 29 December 2025. Google said it could take up to three weeks, and the rollout ran right through the busiest shopping and holiday period of the year. For ecommerce sites, publishers and anyone with seasonal traffic, that timing made the results especially hard to read.
It was the third and final core update of 2025, arriving about five months after the June update. Like other recent core updates, it came with no new guidance from Google. What it did come with was a lot of movement: two visible waves of volatility and, according to independent analysis, heavy swings in YMYL areas such as finance and health.
In this guide we cover the confirmed facts, the holiday timing problem, the impact that analysts observed, what Google advised, and a step-by-step method for reviewing your data without being misled by seasonal demand.
Key Takeaways
- Google released the December 2025 core update on 11 December 2025 and confirmed completion on 29 December 2025, about 18 days later.
- Google said the rollout “may take up to 3 weeks to complete.”
- Volatility was reported from around 13 to 14 December, with a second large spike around 20 December.
- Independent analysis by Glenn Gabe reported heavy YMYL impact (finance first, then health) and big swings for news publishers in Search and Discover.
- Holiday seasonality overlaps the whole rollout, so year-over-year comparisons and ranking data matter more than raw traffic.
- Google gave no update-specific advice; its standard core update guidance applies.
December 2025 core update: the facts
| Item | Detail | Source |
|---|---|---|
| Name | December 2025 core update | Google Search Status Dashboard |
| Type | Broad core update | Dashboard |
| Released | 11 December 2025 (09:25 PST post) | Dashboard incident page |
| Expected duration | “up to 3 weeks” | Dashboard incident page |
| Completed | 29 December 2025 | Dashboard incident page |
| Actual rollout | About 18 days | Search Engine Land; Wikipedia |
| Confirmed by Google? | Yes | Dashboard |
| Order in 2025 | Third core update, after March and June | Search Engine Land |
| Previous core update | June 2025, 30 June to 17 July 2025 | Dashboard |
| Next core update | March 2026, 27 March to 8 April 2026 | Dashboard |
“Released the December 2025 core update. The rollout may take up to 3 weeks to complete.”
— Google Search Status Dashboard, December 2025 core update incident
What Google said
Google posted the update on its dashboard and on social channels. On LinkedIn it repeated its standard description: “This is a regular update designed to better surface relevant, satisfying content for searchers from all types of sites,” as quoted by Search Engine Land. Google did not issue new guidance and pointed back to its existing advice that creators making satisfying content for people need do nothing new.
Google also reminded site owners that it releases smaller core updates that it does not announce. That matters for December 2025 because, as analysts noted, several sites had already moved during the autumn before the broad update began.
The holiday timing problem
An 18-day rollout from 11 to 29 December covers the end of the shopping season and the Christmas break. Search demand for many topics changes sharply in that window: gift and retail queries often peak, many B2B queries quieten, and other sectors follow their own patterns. That makes a simple “before and after” traffic chart unreliable.
- Clicks can fall even if rankings hold, because fewer people search for some topics over the holidays.
- Clicks can rise even if rankings fall, because seasonal demand can mask a ranking loss.
- Comparing to November is risky, because November demand is different from late December demand.
The safest approach is to use average position and impressions per query, and to compare against the same dates in the previous year. Our guide to seasonality vs algorithm updates goes deeper.
Observed impact
Google does not publish winners and losers, so the observations below come from industry sources. They describe patterns in tracked samples and client sites, not confirmed targets.
| Source | Observation | Type |
|---|---|---|
| Search Engine Land | Early volatility from around 13 December; a second large spike on 20 December. Some sites lost significant visibility, some gained, many saw no change. | Observation |
| Glenn Gabe (GSQI) | Update “landed” on 14 December across sites he tracks; a tremor on 20 December. Finance hit first and hardest, followed by health and medical. | Analyst finding |
| Glenn Gabe (GSQI) | Major news publishers saw heavy swings in Search and Google Discover; some highly visible forums dropped, especially in health. | Analyst finding |
| Glenn Gabe (GSQI) | Sites that dropped in Search also tended to lose visibility in AI Overviews. | Analyst finding |
| SE Ranking (via Search Engine Land, April 2026) | In December, 66.8% of top-3 URLs and 83.1% of top-10 URLs changed position; about 14.7% of top-10 pages dropped out of the top 100. | Tracker data |
Gabe also noted that some sites previously hit by spam updates surged back, and that no single cause explained the drops he reviewed; most affected sites faced a combination of issues. He also flagged that some spammy pages surged, which he described as “not what Google intended to happen”. That is a useful reminder that core update outcomes are not a verdict on any single site's quality.
Step-by-step: reviewing December 2025
- Wait until after 29 December. Mid-rollout spikes on 14 and 20 December were not the final picture.
- Pull year-over-year data. Compare late December 2025 with late December 2024 for the same queries.
- Focus on position and impressions. Use Search Console to find queries where average position changed materially.
- Check Discover separately. If you publish news, review the Discover report on its own.
- Review YMYL content carefully. For finance and health pages, check authorship, sourcing, accuracy and how well you answer the query.
- Benchmark competitors. See which pages replaced yours and what they do better for searchers.
- Plan improvements for the long term. Google says recovery can take months and often comes with a later core update.
For YMYL sites, our guide to YMYL core update recovery covers the trust and expertise checks in detail.
Common mistakes
- Comparing December with November. Seasonal demand makes that comparison misleading.
- Making emergency changes over the holidays. As Glenn Gabe points out, Google has said very recent site changes are not factored into a broad update already rolling out.
- Assuming forums or news were “targeted”. Analysts saw patterns, but Google confirmed nothing about targets.
- Ignoring AI Overviews. Losing Search visibility may also reduce AI Overview citations.
- Expecting a quick rebound. Google gives no recovery timelines.
Where it fits in the bigger timeline
December 2025 closed a year with three core updates and one spam update. Early 2026 brought the February 2026 Discover core update, then the March 2026 spam and core updates. Search Engine Land later reported that the March 2026 core update was more volatile than December. See our core updates hub for context.
Related Guides
- Google's February 2026 Discover Core Update: The First Discover-Only Core Update
- Google's March 2026 Core Update Explained
- Google's May 2026 Core Update Explained
Frequently Asked Questions
When did the December 2025 core update roll out?
From 11 December 2025 to 29 December 2025, according to Google's Search Status Dashboard.
Why is December 2025 hard to analyse?
The rollout overlapped the holiday season, when search demand changes sharply. Year-over-year comparisons and ranking data are more reliable than raw traffic.
Which sites were most affected?
Google did not say. Analyst Glenn Gabe reported heavy impact in finance and health and big swings for news publishers, but these are observations rather than confirmed targets.
Did Google give new advice for this update?
No. Google repeated that it was a regular update and pointed to its existing people-first content guidance.
Was the December 2025 update bigger than March 2026?
SE Ranking data reported by Search Engine Land suggested March 2026 was more volatile than December 2025.
Conclusion
The December 2025 core update was a confirmed, 18-day update that overlapped the holiday season and produced two waves of volatility. Read it with year-over-year data, keep confirmed facts separate from analyst observations, and invest in content quality for the long term. If you need help untangling what changed, our ranking drop recovery team and SEO services can help, or request a quote.
References
- Google Search Status Dashboard: December 2025 core update
- Search Engine Land: Google December 2025 core update rolling out now
- Search Engine Land: Google December 2025 core update rollout is now complete
- GSQI: December 2025 broad core update analysis and findings
- Search Engine Land: March 2026 core update more volatile than December
- Google Search Central: Google Search's core updates
