Data providers: Google June 2025 core update was a big update

Google’s June core update overall was a bigger update; where some sites hit by the previous helpful content and reviews updates some some partial recoveries.

The Google June 2025 core update started on June 30, 2025 and completed on July 17, 2025, after a 16 day rollout. Early indications from the data providers show this update was one of the larger core updates we’ve seen in some time.

In fact, it seems like some sites hit by the September 2023 helpful content update saw some partial recoveries (if you would call it that). We also saw some sites hit by earlier reviews updates and other core updates realize some partial recoveries.

That is not to say all sites saw positive results, many did not – and many sites saw significant declines in rankings and search visibility with the June 2025 core update.

Data providers on the Google June 2025 core update

Similarweb. Similarweb’s SERP Seismometer showed when this tool picked up on the largest spikes in volatility for this June core update. The largest spike was on July 11th, according to this tool. But you can see the initial spike on July 2nd, a couple of days after the core update was announced.

Darrell Mordecai from Similarweb sent us over some data to dig deeper when comparing this core update to previous core updates. This chart rates the volatility of each Google core update since 2022, and it shows this was the most volatile core update since August 2024 and November 2023.

When comparing it to March 2025 core update to June 2025 (they labeled it July 2025 but Google named it June 2025), the June core update was more volatile:

While fluctuations in the top three positions remained consistent with previous patterns, the June core update showed greater volatility across the top five rankings.

“Among the health, finance, retail, and travel niches, the finance industry exhibited significantly low levels of fluctuation, especially in the top three and top five results. In contrast, the health industry experienced markedly high volatility in the top five positions,” Darrell Mordecai from Similarweb also told me.

Sistrix. The Sistrix posted a detailed post of winners and losers and more analysis. They sent me an updated US chart showing the biggest movers but check out their detailed post over here.