When To Go · Destination Guide
Wrecks, sanctuary reefs, and sunset culture at the end of the road
Updated Dec 13, 2025 • 16 sources
When to go
Key West is diveable yearround, but conditions change by season.
Best overall window
Warmer water, steadier seas, and the most reliable boatday odds.
Outside that window
Winter cold fronts can spike wind and chop; early fall overlaps peak hurricane risk.
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: Tradeoffs | Overall - Feb: Tradeoffs | Overall - Mar: Good | Overall - Apr: Best | Overall - May: Best | Overall - Jun: Best | Overall - Jul: Best | Overall - Aug: Good | Overall - Sep: Tradeoffs | Overall - Oct: Tradeoffs | Overall - Nov: Good | Overall - Dec: Tradeoffs |
These do not replace the overall planner. Use them only if a specific animal or event is driving your trip dates.
Sea turtle nesting season (regional)
Best for Snorkel, Scuba
May to Aug
Turtle activity increases in summer.
Tarpon near bridges and channels (topside viewing)
Best for Topside
Mar to May
Spring often brings tarpon sightings around bridges and channel edges, making for fun sunset walks and dockside viewing.
Hurricane season planning window
Best for Scuba, Freedive, Snorkel
Jun to Nov
Storm risk rises in late summer and early fall.
Built from climate references, access rules, and destination operators. Wildlife timing and route flexibility can shift year to year.