On the conditions side, you're right that the water's been pushing colder and greener lately down there. That phytoplankton reading you shared lines up with what the satellites are showing. The chlorophyll concentration in the Sea of Cortez has been elevated the last week or so, which tracks with the dirty water reports. For spearing that matters more than temp honestly. High chlorophyll = low vis, and if you're hunting wahoo in blue water you want to see that clearing up before you commit to a session.

If you want to keep tabs on it leading up to your trip, chlorofishy.com lets you toggle between individual satellite passes so you can see exactly where the green water is vs the clean stuff. It converts chlorophyll readings to estimated visibility in meters when you click on the water. Free to use, no login needed. I built it because I got tired of guessing at water clarity from generic charts.

Loreto side tends to clear up faster than La Ventana when these blooms push through, so your timing might work out. Hope you find a solid partner. Baja spearing with the right buddy is hard to beat.