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Florida Keys hurricane season runs June 1 through November 30. The National Hurricane Center puts the season’s peak on September 10, with most activity between mid-August and mid-October. Visitors headed for Key Largo through Key West in June or November face far lower odds of a direct hit than those going in September. That’s because the season’s risk is not spread evenly. The single most decisive fact for trip planning: US-1, the Overseas Highway, is the only road connecting the Keys to the mainland. So evacuation timing matters more here than in most of Florida.
I grew up in South Florida, so salt air, humidity and hurricane season aren’t background trivia to me. I’ve boarded up windows, hauled patio furniture inside and helped with the cleanup after a storm more than once. That kind of prep is routine for anyone who has spent a season on this coast. It shapes how I plan any Keys trip between June and November.
Quick facts
Florida Keys Hurricane Season
| Detail | What to know |
|---|---|
| Official season | June 1 – November 30, per the National Hurricane Center |
| Highest-risk window | Aug. 15 – Oct. 15, per Visit Florida Keys |
| Evacuation route | US-1, the Overseas Highway — the only road out, per Visit Florida Keys |
| Emergency number | 911; visitor info line 1-800-FLA-KEYS, per Visit Florida Keys |
| Hospitals | Three full-service hospitals across the Upper, Middle and Lower Keys, per Visit Florida Keys |
The table below uses the National Hurricane Center’s 1991-2020 average formation dates for the season’s 1st through 14th named storms. It shows how storm activity actually builds month by month. That’s instead of treating the whole June-to-November window as one flat risk. Each column counts how many storms of that type had typically formed by the last day of the month, on average.
| By month-end | Named storms (avg.) | Hurricanes (avg.) | Major hurricanes (avg.) |
|---|---|---|---|
| June 30 | 1 | 0 | 0 |
| July 31 | 2 | 0 | 0 |
| August 31 | 6 | 2 | 0 |
| September 30 | 10 | 5 | 2 |
| October 31 | 13 | 6 | 3 |
| November 30 | 14 | 7 | 3 |
When Is Florida Keys Hurricane Season?
Florida Keys hurricane season matches the official Atlantic season: June 1 through November 30, per the National Hurricane Center. The season doesn’t build evenly, though. Per the table above, an average year has already produced six named storms and two hurricanes by the end of August. Yet major hurricanes still sit at zero, on average, at that point. Most major hurricanes, on average, form after Labor Day. So a trip booked for early June carries a very different risk profile than one booked for late September. Both still fall inside the same six-month window, though.
Florida Keys During Hurricane Season
Most days in Florida Keys hurricane season pass with no storm anywhere near the Keys at all. Visit Florida Keys describes the typical daily weather in this stretch as some of the year’s most beautiful. The surrounding waters run warm and calm. Still, the risk is concentrated, not constant. Per Visit Florida Keys, the highest potential for storms falls between August 15 and October 15. That window lines up with the jump in the table above. Named storms go from six at the end of August to ten by the end of September. Outside those six weeks, a Keys trip carries a risk level closer to any other Gulf Coast destination in the same months.
Key West Peak Hurricane Season
Non-refundable, non-changeable bookings are the first thing to avoid inside the August 15 to October 15 window. That single choice does more to lower your risk than anything else here. A remote day trip, such as a reef snorkeling boat, is also worth skipping once a tropical storm watch is posted for South Florida. Conditions can shift faster than a short charter can outrun. Finally, don’t treat a “sunny” three-day forecast as a guarantee during peak weeks. Tropical development can accelerate a system from a watch to a warning within 24 to 48 hours. None of that means avoiding the Keys entirely in September. It means building slack into the bookings that are hardest to change.
Florida Keys Hurricane Evacuation
The Keys have exactly one road connecting them to the mainland: US-1, the Overseas Highway. That’s per Visit Florida Keys’ visitor safety page. There is also no second route and no rail alternative. As a result, local officials often issue evacuation orders for the Keys earlier than mainland Florida counties. A long, single-lane chain of islands simply takes longer to clear than a city grid does. If a hurricane watch or warning is posted during your trip, treat an evacuation order as a hard deadline, not a suggestion. Leave well before the order takes effect. Waiting until the last possible hour is the one mistake worth avoiding on a single-lane road.
Hurricane Watch vs Warning
A tropical storm or hurricane watch means those conditions are possible within 48 hours, per the National Hurricane Center’s standard terminology. A warning is more urgent: it means those conditions are expected within 36 hours. So a watch is the signal to finalize your evacuation plan, not to wait and see. A warning, by contrast, means the window for a calm, unhurried drive up US-1 is closing fast. Also worth knowing: Monroe County can call for a visitor evacuation before either is posted, based on the storm’s forecast track, because clearing a single road takes longer than clearing a mainland city. Check local advisories directly instead of relying on a general national forecast once any tropical system is active near South Florida.
Best Time to Visit Florida Keys
December through April sits outside hurricane season entirely. It’s also the Keys’ busiest, driest stretch, so it comes with the highest lodging demand of the year. June and early July are a reasonable middle ground for travelers who want warm water and lower crowds. Storm odds are also still lower than late summer. Both months sit inside the official season, but well ahead of the mid-August to mid-October risk window described above. November is the other underused option, especially the back half of the month. By then the season’s statistical activity has mostly tapered, per the storm-count table. Either window still works well for a multi-day drive down the Overseas Highway. Traffic and lodging demand both ease outside the December-to-April rush.
Does travel insurance cover hurricanes?
For any Keys trip booked inside the June-through-November window, travel insurance with a named-storm or “cancel for any reason” provision is worth pricing out early. Price it before you book lodging, not after a storm is already in the forecast. Most policies stop covering a trip once a named storm exists. Read the policy’s specific hurricane clause, too. Don’t just assume general trip insurance automatically covers a storm. Some plans only pay out under a mandatory evacuation order, not simply a watch or warning. Also confirm the cancellation window with your lodging directly. Keys properties vary widely on how close to a storm they’ll waive fees.
Is Key West safe during hurricane season?
I’ve spent enough Augusts on this coast watching a clear morning turn into a tropical storm watch by dinner. So I trust the calendar over a forecast three weeks out. My honest answer: Florida Keys hurricane season is worth the calculated risk. That’s true if you avoid the mid-August to mid-October window, or build real flexibility into whatever bookings fall inside it. The Keys stay open and welcome visitors through the entire season in an average year. The table above shows exactly how concentrated the actual risk is. It isn’t spread evenly across six months.
Frequently asked questions about florida keys hurricane season
Do hurricanes hit the Florida Keys?
Most days are safe, because storms are the exception rather than the rule even during the riskiest weeks. Still, the safer approach is booking refundable arrangements and watching the National Hurricane Center’s outlook before you travel.
When is hurricane season for the Florida Keys?
Hurricane season in the Florida Keys ends November 30 and starts June 1. Those dates match the official Atlantic hurricane season set by the National Hurricane Center.
How much warning before a hurricane?
The National Hurricane Center typically issues watches and warnings several days ahead of a storm’s arrival. But US-1 is the only evacuation route. So local officials often call for evacuations earlier than mainland counties, to give the single-lane exit enough time to clear.
Is Key West open during hurricane season?
Key West stays open to visitors through nearly all of hurricane season in a typical year. It only closes to incoming traffic when Monroe County issues a formal evacuation order. Outside those windows, the usual short-trip highlights are running normally.
What is the cheapest time to visit the Florida Keys?
June and early July tend to see lower lodging demand than the December-to-April peak season. They fall well before the mid-August to mid-October risk window. Exact rates still vary by property, so confirm them directly with the lodging provider.
Updated September 20, 2026.
Photo credits: (1) The Seven Mile Bridge at sunset, seen from… — Franz Stellbrink, CC BY 3.0, via Wikimedia Commons; (2) Aerial view of the Seven Mile Bridge and… — U.S. Department of Transportation, U.S. Government work, public domain, via Wikimedia Commons; (3) Cormorants resting on mangroves over calm… — NOAA, U.S. Government work, public domain, via Wikimedia Commons.