On Diamante's Beach, Whale Season Starts Before Turtle Season Ends

Most evenings on Diamante's Pacific-facing beach look like any other stretch of Baja coastline at dusk. Then, on certain nights this time of year, a small patch of sand gets smoothed flat, a golf cart idles nearby with a cooler in the back, and a crate gets carried down from the dunes. What comes out of that crate has already survived incubation, a nest relocation, and roughly forty-five days underground. What happens next, on the same water where those hatchlings disappear into the surf, is that within a matter of weeks the first whale spouts of the season will start breaking the surface a few hundred yards out.

Nobody markets these two events together. Turtle releases get pitched as a summer-into-fall thing. Whale watching gets pitched as a winter thing. On Diamante's own mile and a half of beach, the calendar doesn't split that cleanly. For a real stretch of the fall, both are happening at once, on the same sand, and almost none of the tour operators or hotel blogs that cover either season ever mention the other.

Whose program is actually running the release

If you've looked into turtle releases anywhere in Los Cabos, you've probably run across ASUPMATOMA, the region's turtle conservation nonprofit. It's a real organization, formalized in 1995 and headquartered at San Cristobal Ranch in Cabo San Lucas, where owner Rene Pinal serves as the group's president. ASUPMATOMA runs beach patrols, relocates nests, and organizes public releases across the municipality, and its scale is genuinely regional: in the 2024–2025 season alone, the organization protected 1,140 nests and released 71,769 hatchlings, with participation from more than 2,200 volunteers, students, and visitors.

That's the citywide effort. What runs on Diamante's own frontage is a separate thing: an on-site conservation program specific to the property, historically operated under staff supervision rather than as a satellite of the city nonprofit. Accounts of the releases describe a Diamante employee named Carlos Villalobos briefing the crowd before hatchlings go into the water, a level of hands-on, property-specific stewardship that's different from booking a release through a Cabo San Lucas tour operator working with ASUPMATOMA's broader network. If you live at Diamante and want to watch a release, you're not necessarily tapping into the same pipeline as someone booking a $95 tour out of the marina. You're watching something the community runs on its own sand.

The species most commonly involved is the Olive Ridley, known locally as the golfina, the smallest of the five sea turtle species found in Baja waters and the one most often nesting on beaches like Diamante's. All five species present in these waters, Hawksbill, Loggerhead, Leatherback, Green, and Olive Ridley, are endangered, which is the entire reason nest relocation and monitored releases exist in the first place rather than leaving nests to natural predation rates that run close to one surviving hatchling per thousand.

Where late September actually sits on the calendar

Ask three different tour operators when turtle season runs in Los Cabos and you'll get three overlapping but not identical answers. One outfit lists nesting-to-release activity from late August through early December. Another cites July through December. A third runs its specific release tours from September 1 through December 15. The exact edges shift depending on which operator or which year you're asking about, but the center of the range is consistent: by late September, the season isn't winding down. It's closer to the middle of its run than the end.

That matters because most content built around turtle releases treats them as a late-summer curiosity, something to catch before autumn takes over. On Diamante's beach, the releases keep going well past the point where a visitor might assume the season is over, right through the fall and into the first weeks of December in most years.

The overlap nobody puts in the same paragraph

Whale season in Los Cabos gets described differently depending on who's selling the tour. Some operators peg the official window at November 15 through April 15, with early-season sightings already running at a 70 to 90 percent success rate by the second half of November. Broader guides describe the season as stretching from November through April, with the heaviest concentration of humpbacks and gray whales arriving between January and March. Diamante's own property materials describe the migration months more loosely, as late fall through March, and note that whales are visible directly from the beach chairs or from a spot on the golf course itself. No boat required.

Put those two calendars next to each other and the overlap becomes obvious in a way that neither the whale-tour operators nor the turtle-release outfits seem to advertise. If turtle releases are still running into early or mid-December in most years, and the earliest whale sightings start showing up by mid-November, there's a real stretch, roughly four to six weeks, where both are happening on the same beach at the same time. A resident walking Diamante's sand in late November could plausibly watch a hatchling release at sunset and catch a distant spout the same week, sometimes from the same spot.

That window isn't an accident of two unrelated migrations happening to coincide. It's just what this particular beach looks like in late fall, and it's the kind of detail that gets lost when every piece of content about either season is written to sell a single tour rather than to describe what a person who already lives here would actually notice.

What this looks like on the ground this fall

For anyone already spending time at Diamante, the practical version of all this is simple. The releases don't require a booking, a marina pickup, or a drive into town. They happen on the property's own beach, timed for sunset because the cooler light and lower predator activity give hatchlings a better shot at reaching the water. The whales, once they start arriving, don't require a charter either. Diamante's own beachfront and golf course sightlines are enough to catch a spout on a calm morning or a clear late afternoon.

A few notes worth keeping in mind through the rest of the fall:

• Release timing tends to cluster around sunset, both for turtle safety and because that's when staff typically clear and smooth the release strip.
• Early whale activity is more likely on calmer mornings, when a spout is easier to pick out against flat water.
• The golfina, or Olive Ridley, is the species most commonly represented in releases on this stretch of coast, and at roughly ninety pounds at maturity it's notably smaller than the leatherbacks and greens also native to these waters.

None of this depends on high season. It depends on being here in the weeks most visitor guides skip past, the ones between the last of the summer humidity and the first crowded week of whale-watching charters out of the marina.

The Goldsmith Group perspective

Diamante changes by the week this time of year, and most of what changes doesn't show up in a golf calendar or a resort newsletter. If you're spending the fall on this stretch of coastline, the next several weeks are worth watching from your own patch of sand before the marina crowds arrive for peak whale season. Goldsmith Group keeps a close eye on what's actually happening on the ground across Diamante and the rest of the Los Cabos Corridor, from tournament weeks to turtle season, and we're always glad to talk through what a given season looks like for anyone who calls this coastline home.