When To Go · Country Guide
Reef drifts, cenotes, and big-animal expeditions across three coastlines
When to go
Mexico is diveable year-round, but seasons differ by coast.
Best overall window
Lower storm risk, breezes around 20 km/h to 30 km/h, and comfortable coastal temperatures.
Outside that window
Peak heat, higher humidity, and the highest tropical-cyclone risk on both coasts.
Start with the overall answer, then switch only when scuba, freedive, snorkel, or topside timing changes the trip in a meaningful way.
The overall row stays visible so you can compare it against the currently selected scope.
| Scope | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Overall | Overall - Jan: Best | Overall - Feb: Best | Overall - Mar: Best | Overall - Apr: Best | Overall - May: Good | Overall - Jun: Good | Overall - Jul: Tradeoffs | Overall - Aug: Tradeoffs | Overall - Sep: Tradeoffs | Overall - Oct: Good | Overall - Nov: Best | Overall - Dec: Best |
These do not replace the overall planner. Use them only if a specific animal or event is driving your trip dates.
Whale shark snorkeling
Best for Snorkel, Topside, Freedive
Apr to Sep
Guided 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)
Best for Scuba
Nov to Feb
Seasonal bull shark encounters are most associated with boat dives out of Playa del Carmen.
Revillagigedo pelagic peak
Best for Scuba
Nov to Jun
Liveaboards to Revillagigedo operate in the park's open season and focus on pelagic action in blue water.
Gray whale watching (Baja lagoons)
Best for Topside
Dec to Apr
Winter and early spring are the classic window for gray whale watching in Baja California, often combined with Sea of Cortez time around La Paz or Loreto.
Humpback whale season (Baja and Pacific)
Best for Topside
Dec to Apr
Humpbacks are commonly seen on Pacific-facing Baja and parts of the mainland Pacific in winter.
Sea turtle nesting and hatchlings
Best for Topside, Snorkel
May to Oct
Many Mexican coasts have nesting programs in summer and early autumn.
Sargassum season planning (Quintana Roo)
Best for Snorkel, Topside
May to Aug
Some Riviera Maya beaches can see heavier sargassum in late spring and summer.
AIDA Cortez Cup
Best for Freedive
Aug
A 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)
Best for Freedive
Oct to Nov
AIDA depth competition held in the Yucatan cenote system, often used by athletes and visitors as a training anchor for trips based from Tulum.
Built from climate references, access rules, and destination operators. Wildlife timing and route flexibility can shift year to year.