When To Go · Destination Guide

Key Largo

America's first undersea park meets easy reef days and legendary wrecks

Updated Dec 13, 2025 • 12 sources

When to go

Best time to visit Key Largo

Key Largo sits in a tropicalmaritime climate with a dry season (roughly December to April) and a wet season (June to October).

Best overall window

Dry season with lower humidity and more reliable sunshine. Water often feels like 22°C to 26°C.

Outside that window

Wet season heat, afternoon thunderstorms, and hurricaneseason risk. Keep plans flexible and watch forecasts.

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.

BestGoodTradeoffsMore variable

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: Tradeoffs	Overall - Jul: Tradeoffs	Overall - Aug: Tradeoffs	Overall - Sep: Tradeoffs	Overall - Oct: Tradeoffs	Overall - Nov: Good	Overall - Dec: Best

These do not replace the overall planner. Use them only if a specific animal or event is driving your trip dates.

REEF Florida Keys Lionfish Derby and Arts Festival
Best for Scuba, Freedive, Topside
Apr
JanFebMarAprMayJunJulAugSepOctNovDec
Late April often brings a community lionfish removal competition that culminates at the REEF campus in Key Largo with a public festival, conservation booths, and awards.
Spiny lobster mini-season
Best for Scuba, Snorkel
Jul
JanFebMarAprMayJunJulAugSepOctNovDec
Florida's spiny lobster sport season is the last consecutive Wednesday and Thursday of July each year.
Regular spiny lobster season
Best for Scuba, Snorkel
Aug to Mar
JanFebMarAprMayJunJulAugSepOctNovDec
The regular Florida spiny lobster season runs from early August through March.
Sea turtle nesting and hatchlings
Best for Topside, Snorkel
May to Oct
JanFebMarAprMayJunJulAugSepOctNovDec
Sea turtle nesting season in South Florida generally spans late spring through early fall.
Hot-water coral stress and bleaching risk
Best for Scuba, Snorkel, Freedive
Jul to Sep
JanFebMarAprMayJunJulAugSepOctNovDec
Midsummer sea temperatures can rise into the upper end of the 21°C to 30°C range, increasing coral stress.

Hurricane season officially runs June 1 to November 30, with peak activity typically midAugust to midOctober.

May, Nov: Transition months with warm water and fewer crowds. Conditions can swing between calm seas and early seasonal fronts.
Jun to Oct: Wet season heat, afternoon thunderstorms, and hurricane-season risk. Keep plans flexible and watch forecasts.

Built from climate references, access rules, and destination operators. Wildlife timing and route flexibility can shift year to year.