Present in the Gulf; the large aggregations and breaching behaviour are a La Paz product rather than a Cabo Pulmo one. Sources do not give a Cabo Pulmo-specific season.
Year-round diving with no closure. The constraint is permit capacity: roughly two dive groups per site per day, with El Vencedor allocated by weekly lottery. Both sources agree Aug-Dec gives the warmest water (27-30C) and best visibility (24-27m); ZuBlu's Feb-Jun bull shark window sits in the coldest, murkiest part of the year, which is part of why the contradiction matters. Book 3-6 months ahead for peak season.
Destination detail