How warm is Cancún in December?

Typical highs are about 81°F and the sea is about 82°F. That is warm enough for long swims without a wetsuit.

Is there sargassum in Cancún in December?

In a typical year seaweed is moderate in December. It is usually lightest in January and December and heaviest in July and August. Landings vary a lot by year, wind and currents; Veabird's weekly sargassum report and each beach's page have the current forecast.

Is December hurricane season in Cancún?

No. Storm risk is very low in December.

How crowded is Cancún in December?

Typically very busy, around Christmas & holiday break. The quietest months are usually September and October.

Cancún in December

December is a good month for Cancún: a typical day grades B, the 5th best of the 12 months. Expect highs near 81°F, water around 82°F and about a 48% chance of rain on a given day. Sargassum (seaweed) is usually moderate in December. Beaches are typically very busy (Christmas & holiday break).

Typical dayB5th of 12 months

Highs / water81°FSea 82°F

Rain chance48%on a given day

SeaweedModeratetypical year

CrowdsVery busyChristmas & holiday break

Storm riskVery lowoutside storm season

Cancún month by month

Typical grade and high for each month. Higher is better: A+ to F.

November: B- · December: B · January: B. The best months are usually February, April and May, and the weakest are August and September.

Best beaches in Cancún in December

Resorts with the best typical December, and their grades for the next few days.

Beach	Typical Dec	Seaweed	This week
Holbox Island Hotels	A-	Very low	SatC+SunC+MonC-TueCWedC
Villas Flamingos	A-	Very low	SatC+SunC+MonC-TueCWedC
Villas Delphines	A-	Very low	SatC+SunC+MonC-TueCWedC
Xaloc Resort	A-	Very low	SatC+SunC+MonC-TueCWedC
Club Las Hamacas	A-	Very low	SatC+SunC+MonC-TueCWedC
Bahia Tolok	B+	Low	SatC+SunB+MonB+TueB+WedA-
Selina Hotel Cancun Lagoon Zona Hotelera	B+	Low	SatCSunB-MonBTueB+WedB+
Hotel Villa Rolandi	B+	Low	SatC+SunB+MonB+TueB+WedA-

Grades for the next few days from Veabird's beach forecast, updated Oct 3, 18:00 UTC. Higher is better: A+ to F.

Better beach options in December

Elsewhere in Mexico, Huatulco (A), Puerto Vallarta (A) and Los Cabos (A) usually grade higher in December. Further afield: the Big Island (A-), Maui (A-) and Oʻahu (A-). Every destination in December.

Questions

Is December a good time to visit Cancún?: December is a good month for Cancún: a typical day grades B, the 5th best of the 12 months. Expect highs near 81°F, water around 82°F and about a 48% chance of rain on a given day. Sargassum (seaweed) is usually moderate in December. Beaches are typically very busy (Christmas & holiday break).
How warm is Cancún in December?: Typical highs are about 81°F and the sea is about 82°F. That is warm enough for long swims without a wetsuit.
Is there sargassum in Cancún in December?: In a typical year seaweed is moderate in December. It is usually lightest in January and December and heaviest in July and August. Landings vary a lot by year, wind and currents; Veabird's weekly sargassum report and each beach's page have the current forecast.
Is December hurricane season in Cancún?: No. Storm risk is very low in December.
How crowded is Cancún in December?: Typically very busy, around Christmas & holiday break. The quietest months are usually September and October.

Plan it

Cancún & Isla Mujeres: this week's forecast, beach by beach
Mexico Beach Report: this week, updated every Monday
Compare dates and beaches on the map

Typical-month numbers from Veabird's year-ahead outlook for the 86 resorts here (median resort): 6 years of ERA5 climate normals, the seasonal pattern of the Atlantic sargassum belt, holiday crowd calendars and historical storm tracks. Any given year can differ; check the 16-day forecast before you go.