Quick Answer
Whale shark season in La Paz runs November through April. Peak season is December through March — the largest aggregations, best visibility, and most reliable encounters. January and February are the absolute peak months. November is early season with smaller sharks and fewer crowds. April is late season but still highly reliable.
When Is Whale Shark Season in La Paz?
Whale sharks (Rhincodon typus — the world's largest fish) aggregate in La Paz Bay every year from November through April to feed on the plankton-rich waters of the Sea of Cortez (Gulf of California). La Paz Bay is one of the only places on earth where encounters are this consistent — not a migration sighting, but a reliable seasonal aggregation that happens year after year in the same protected waters.
The season is regulated by CONANP (Comisión Nacional de Áreas Naturales Protegidas), Mexico's federal protected areas authority. All permitted operators including The Hook receive daily zone access slots and are limited to 2 hours in the whale shark zone per departure. CONANP releases the official schedule the afternoon before each tour date — we confirm your exact departure time via WhatsApp that evening.
Month-by-Month Breakdown
November
Whale sharks begin arriving in La Paz Bay. Smaller individuals typically appear first. Fewer crowds and more last-minute availability. Water temperature dropping from summer highs — wetsuit recommended. Good encounters but not peak numbers.
December
Peak season begins. Aggregations grow significantly. Multiple whale sharks on most departures. Water visibility excellent. Book 3–4 weeks in advance — this month fills quickly especially around holidays and Puentes.
January
The best month. Largest sharks, highest aggregation numbers, best water conditions. Multiple encounters per tour are common. Book 4–6 weeks ahead minimum. This is when we consistently see the most extraordinary encounters of the year.
February
Equal to January for encounter quality. Largest aggregations of the season. Excellent visibility. Valentine's week and Semana Santa holiday periods fill fast — book well ahead. Weather generally excellent with calm morning conditions.
March
Still excellent. Slightly fewer crowds than January–February. Aggregations remain strong through most of the month. One of the best months for last-minute travelers who missed peak. Water temperatures beginning to rise — comfortable snorkeling.
April
Late season — whale sharks still present through the last day of April but numbers declining. More variability in encounter quality. Warmer water and calmer conditions. Good option for travelers who can't come during peak months.
What Makes Peak Season Different?
Three things distinguish peak season (December–February) from shoulder season in La Paz Bay:
More sharks aggregate. The plankton blooms that attract whale sharks are most concentrated in December through February. More food means more sharks in a smaller area — which means more encounters per tour and longer time alongside individual animals.
Better water visibility. Winter months in La Paz Bay bring cleaner, clearer water. Underwater visibility during peak season is consistently excellent — you can see whale sharks approaching from 10–15 meters before they reach you.
More predictable wind and sea conditions. La Paz Bay is sheltered from Pacific swells, but winter months bring the most consistently calm morning conditions. The 2-hour zone window CONANP allows is spent in the water — not transiting in rough conditions.
How Early Should You Book?
The Hook limits every whale shark tour to a maximum of 10 guests. That means departures fill faster than any large-boat operator. As a general guide:
December–February: Book 4–6 weeks ahead. Holiday periods (Christmas, New Year, Valentine's week) book out 6–8 weeks in advance.
March: 2–3 weeks ahead is usually sufficient but don't wait.
November and April: Last-minute bookings are often possible. Contact us via WhatsApp for same-week availability.
What to Expect on the Day
CONANP releases the official whale shark zone schedule the afternoon before each tour date. We confirm your exact departure time via WhatsApp that evening — typically noon departure outside of peak season, though this varies with CONANP assignments. Meet at The Hook on Paseo Alvaro Obregon (La Paz Malecón) at the confirmed time.
Your marine guide positions the boat alongside whale sharks and rotates guests into the water in groups of 3–4. Every guest goes multiple times — no single rotation on a crowded deck. Total time in the whale shark zone is 2 hours as permitted by CONANP.