December is one of the best months for liveaboard diving in Costa Rica (Cocos). Conditions are at their peak with great visibility, calm seas and prime marine life encounters.
What you might see
Year-round overview for Costa Rica (Cocos)
Frequently asked questions
Is December a good month to dive in Costa Rica (Cocos)?
December in Costa Rica (Cocos) is rated as peak season. Water temperatures are around 27–29°C and conditions are usually suitable for liveaboard trips.
What can you see diving in Costa Rica (Cocos) in December?
In December, divers in Costa Rica (Cocos) typically encounter the marine life highlighted on this page, with seasonal aggregations depending on currents, plankton blooms and breeding cycles.
Should I book a Costa Rica (Cocos) liveaboard for December or wait?
If you want this month's specific marine life and conditions, book early — peak departures fill up months ahead. If you are flexible, compare November and January which often share similar conditions.
Find a liveaboard for December
Compare available Costa Rica (Cocos) liveaboards departing in December.
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