Bait Balls

mantas

Diving San Carlos in Summer: Warm Water, Mantas & Marine Magic

Summer in the Sea of Cortez is a completely different beast than the cool winter months. From July through August, the water turns bath-warm, you can ditch the thick 7mm wetsuit, and the ocean erupts with life. While visibility might drop due to nutrient-rich plankton blooms, the trade-off is spectacular: massive bait balls, cruising manta rays, and huge schools of pelagics. Here is what to expect, what to pack, and how to beat the desert heat topside during a summer dive trip to San Carlos.

bait balls

Bait Balls in the Sea of Cortez: San Carlos’ Ultimate Ocean Show

You are cruising to your next dive site when the ocean suddenly begins to boil. The sky darkens with diving pelicans, and the water erupts with dolphins and sea lions. You’ve just stumbled upon a bait ball—the most spectacular and chaotic wildlife event in the Sea of Cortez. This guide explains the science behind this frantic defensive strategy, introduces the cast of predators that coordinate the attack, and reveals why the boat ride in San Carlos is often just as thrilling as the dive itself.

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