Google’s May Core Update is now complete. The company confirmed the completion on June 2. Research Status Dashboard.
The update began on May 21 at 8:40 a.m. PDT and ended on June 2 at 5:40 a.m. PDT, lasting 11 days and 21 hours. It is close to March main update, completed in 12 days.
What practitioners observed
Launching the update, Marie Haynes, founder of Marie Haynes Consulting Inc., connected the timing to the changes announced by Google during I/O the same day. Google had launched Gemini 3.5 Flash as a model powering its AI search features.
Third-party tracking tools showed high volatility at several points during the deployment. Some practitioners described the May update as more visible than the March update.
From the first weekend, Glenn Gabe, SEO consultant at G-Squared Interactive, reported impact “across verticals and countries.”
He later observed on:
“Again, the May 2026 core update has been strong so far… it feels a lot more like a typical core update. March was good, but May is great.”
Lily Ray, vice president of SEO strategy and research at Amsive, also posted on on weekend travel. Ray wrote:
“A handful of sites started seeing big increases over the weekend with the core update.”
Why this update may be difficult to read
Completion does not mean that all movements during deployment had the same cause.
Ranking data showed movement at multiple points in the rollout, not just at the beginning and end. A site that was moved on May 24 may require a different reading than one that was moved on June 2.
This makes single-day comparisons risky. Google main update documentation says to wait at least a full week after completion before analyzing Search Console data, then compare that week with the week before the rollout began. This places the first clean comparison window around June 9.
2026 Update Timeline
The May core update is the fourth confirmed search-related update that Google has listed on the website. Research Status Dashboard in 2026, and the second main Search update this year.
About six weeks separated the March Core Update ends on April 8 and the May launch on May 21.
This is what the recent timeline looks like.
- May 2026 Core Update: 12 days (May 21 to June 2)
- March 2026 Main Update: 12 days (March 27 to April 8)
- March 2026 Anti-Spam Update: Less than 20 hours old (March 24-25)
- February 2026 Discover Core Update: 22 days (February 5 to February 27)
- December 2025 Main Update: 18 days (December 11 to December 29)
Looking to the future
Google’s guidance indicates that June 9 will be the first clean comparison window in Search Console.
From there, the most useful reading will come from patterns spread across pages, queries, countries, devices, and search types. Single-day ranking movement may be less reliable, especially given the volatility seen at multiple points in the rollout.
Featured Image: JHVEPhoto/Shutterstock
