Mercury will ingress into Leo on June 26, 2025. The planet will reach 15 degrees, mid-July, before turning retrograde. Mercury will retrograde back t0 4 degrees Leo, before turning direct on August 11th. Mercury will leave Leo for Virgo on September 2nd. This will Mercury in a sign, roughly two and a half times as long as usual.
I don’t view this as a problem, especially as the planet will not be stressed much during this period. But it will focus mental energy on one or two houses in your chart. You may also want to consider how aspects planets in your chart.
As an example, Mercury in Leo lands in my 7th house (relationships). It conjoin my natural Venus (relationships) and trine my Mercury and Mars in Libra (relationships).
I’d expect to have a lot of one on one conversations and perhaps to write about love and social relationships in general. I like this stuff; creative (Leo) writing (Mercury as well, so this looks to be a good transit for me. You may feel differently.
For example, if you have a stellium in Taurus, Scorpio or Aquarius or a large number of planets in these signs, I could see this getting very annoying!
How do you feel about Mercury’s long stay in Leo? Thumbs up? Or down?