Biscayne in December: Crowds, Weather & What to Pack

Best window · VisitWhen score 62/100 · #3 of 12 months

December is one of the best months of the year to visit Biscayne National Park: crowds run 77% of the May peak (47,260 average visits). Weather: highs average 80°F and lows 66°F, with 2.2″ of precipitation and 10.6 hours of daylight. Computed from NPS and NOAA data.

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Biscayne in December: what the park service says

December's dry, mild weather suits the guided trips if you have no boat of your own. The Biscayne National Park Institute runs cruises to Boca Chita Key and its lighthouse, sails on the bay, explores Jones Lagoon and snorkels a shipwreck on the Maritime Heritage Trail; it advises booking ahead, by phone at 786-335-3644 or at the park store. Other authorized companies run sightseeing boats to the Stiltsville area. On Boca Chita, the 65-foot lighthouse Mark Honeywell built in the 1930s has an observation deck with views of the islands, the ocean and the Miami skyline, opened when park staff are around, and a half-mile trail runs to the island's south end.

Source: NPS 1, NPS 2, NPS 3, checked 2026-11-08.

Crowds in December

Biscayne averages 47,260 recreation visits in December — 77% of what May, the peak month, draws. That crowd level sets the tone for parking, permits and lodging — book early and start days at dawn.

Weather & daylight

Days are pleasant (highs average 80°F), and nights stay mild (lows average 66°F). Average precipitation is 2.2″ for the month. Mid-month daylight runs 10.6 hours.

NOAA 1991–2020 monthly normals, station CAPE FLORIDA, FL US (12 mi from park coordinates, 6 ft elevation) — conditions vary inside the park, especially with elevation. Daylight computed for the 15th of December.

What to pack for Biscayne in December

Computed from the month's weather normals above — not a generic list.

• Packable rain jacket — 2.2″ of precipitation is normal this month
• Sturdy broken-in footwear, navigation and a basic first-aid kit — every park, every month

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Also at their best in December

Other parks whose computed December verdict is a best window — same NPS × NOAA formula:

• American Samoa in December — 17% of peak crowds, highs 88°F, score 66/100
• Everglades in December — 72% of peak crowds, highs 80°F, score 64/100

Common questions

See also: the best national parks to visit in December · Last verified 2026-09-24