When To Go · Country Guide
Reef drifts, cenotes, and big-animal expeditions across three coastlines
Updated Mar 4, 2026 • 5 sources
When To Go
Season planner for Mexico
Mexico is diveable year-round, but seasons differ by coast. The Mexican Caribbean is most predictable from December to April, with clearer water and fewer tropical systems, while late spring and summer bring warmer water, more humidity, and periodic sargassum on some Quintana Roo beaches. Baja and the Sea of Cortez often shine in late summer to autumn when water is warmest, while winter can be cooler with stronger winds and thermoclines.
Hurricane season affects both basins: the Eastern Pacific season typically runs May 15 to November 30, and the Atlantic season runs June 1 to November 30. During these months, plan flexible days, watch port closures, and keep cenotes as a backup activity near Tulum. For big-animal liveaboards, Revillagigedo generally operates in the cooler-season window (roughly November to June).
At A Glance Heatmap
| Activity | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Overall | ||||||||||||
| Scuba | ||||||||||||
| Freedive | ||||||||||||
| Snorkel | ||||||||||||
| Topside |
Activity Drilldowns
OverallNovember - May·Crowd:Moderate·Cost:Midrange
Ideal: Lower storm risk, breezes around 20.0 kph to 30.0 kph, and comfortable coastal temperatures.
Plan Carefully: Peak heat, higher humidity, and the highest tropical-cyclone risk on both coasts.
Winter is peak travel for comfort and for Baja whale watching, but holiday weeks can be busy and pricier.
ScubaNovember - April (Caribbean) & August - November (Sea of Cortez)·Crowd:High·Cost:Premium
Ideal: Caribbean visibility often improves, water about 25°C to 28°C, and [Revillagigedo](/destinations/revillagigedo-socorro-islands-mexico) liveaboards run.
Plan Carefully: Hurricane season can disrupt Caribbean and Pacific trips, even though Baja can be excellent with water 27°C to 29°C.
For protectedarea crossings like Mahahual and Chinchorro, CONANP recommends February to May for favorable sea conditions.
FreediveFebruary - June (cenotes) & August - October (Baja warm season)·Crowd:Low·Cost:Midrange
Ideal: Cenotes stay stable around 24°C, and ocean sessions can find calmer windows.
Plan Carefully: Cooler Baja water 19°C to 22°C and stronger winds can shorten open-water sessions.
If you want competitions and organized safety, watch AIDA calendars: events like AIDA Cortez Cup (Sea of Cortez, August) and AIDA Xibalba (cenote depth, autumn) can be useful anchors.
SnorkelDecember - April (clearer Caribbean) & April - September (whale sharks, conditions permitting)·Crowd:Moderate·Cost:Midrange
Ideal: Clearer water, fewer storms, and comfortable seas for beginners.
Plan Carefully: Hurricane season risk and higher chance of sargassum on some Quintana Roo beaches.
Whale shark tours are typically concentrated from spring through summer, especially out of Isla Mujeres and Isla Holbox.
TopsideNovember - April·Crowd:High·Cost:Midrange
Ideal: Dry-season comfort with breezes and fewer weather cancellations.
Plan Carefully: Heat and the most frequent tropical systems; keep flexible bookings.
Winter is ideal for desertandsea road trips in Baja and for whale watching.
Seasonal Callouts Timeline
Whale shark snorkeling
JanJanFebFebMarMarAprAprMayMayJunJunJulJulAugAugSepSepOctOctNovNovDecDecGuided tours from Isla Mujeres and Isla Holbox target whale sharks during the recommended April to September window inside protected waters.
Bull shark season (Riviera Maya)
JanJanFebFebMarMarAprAprMayMayJunJunJulJulAugAugSepSepOctOctNovNovDecDecSeasonal bull shark encounters are most associated with boat dives out of Playa del Carmen. Choose operators that follow local codes of conduct and keep divers well separated from feeding activity.
Revillagigedo pelagic peak
JanJanFebFebMarMarAprAprMayMayJunJunJulJulAugAugSepSepOctOctNovNovDecDecLiveaboards to Revillagigedo operate in the park's open season and focus on pelagic action in blue water.
Gray whale watching (Baja lagoons)
JanJanFebFebMarMarAprAprMayMayJunJunJulJulAugAugSepSepOctOctNovNovDecDecHumpback whale season (Baja and Pacific)
JanJanFebFebMarMarAprAprMayMayJunJunJulJulAugAugSepSepOctOctNovNovDecDecHumpbacks are commonly seen on Pacific-facing Baja and parts of the mainland Pacific in winter. Boat trips from Los Cabos are a common add-on.
Sea turtle nesting and hatchlings
JanJanFebFebMarMarAprAprMayMayJunJunJulJulAugAugSepSepOctOctNovNovDecDecMany Mexican coasts have nesting programs in summer and early autumn. Follow local beach rules and avoid lights near nesting zones, especially in Quintana Roo and the Pacific.
Sargassum season planning (Quintana Roo)
JanJanFebFebMarMarAprAprMayMayJunJunJulJulAugAugSepSepOctOctNovNovDecDecSome Riviera Maya beaches can see heavier sargassum in late spring and summer. Use official monitoring, pick boat-based snorkeling, or shift days to cenotes from Tulum.
AIDA Cortez Cup
JanJanFebFebMarMarAprAprMayMayJunJunJulJulAugAugSepSepOctOctNovNovDecDecA competitive freediving event typically held in the Sea of Cortez region, useful if you want coaching access and strong safety coverage.
AIDA Xibalba (cenote depth)
JanJanFebFebMarMarAprAprMayMayJunJunJulJulAugAugSepSepOctOctNovNovDecDecAIDA depth competition held in the Yucatan cenote system, often used by athletes and visitors as a training anchor for trips based from Tulum.