Islamorada Marine Forecast — The Hump
Updated Mon Jul 20, 2026 · refreshed daily from the latest marine models
Mostly good boating Mon; caution Tue–Wed for choppy seas
Forecast for Jul 20–22, 2026
📋 Mostly good boating Mon; caution Tue–Wed for choppy seas
Monday is the cleanest day of the forecast with south winds at 10–14 knots and seas at 1.8–2.2 feet from the SSE all day. Both wind and wave ratings are good for every hour. High confidence at 95% — plan with confidence.
Tuesday carries a caution flag as seas build to 3.1 feet from the SE at steep 3-second periods mid-morning, with 15-knot southeast winds gusting to 20 knots from 10:00 AM to 1:00 PM EDT. Early morning and late afternoon are the better windows. Avoid the mid-day peak if possible.
Wednesday sees light ESE winds of 7–11 knots all day, but steep SE wind-wave chop at 3-second periods triggers a caution classification for roughly four mid-morning hours. Seas hold at 2.0–2.2 feet from the SE throughout. Early morning or mid-afternoon departures are the better options.
The three-day window offers generally manageable conditions with light-to-moderate winds throughout, but short 3-second wave periods keep seas choppy and steep across all days. Monday stands out as the cleanest day, while Tuesday sees seas build to over 3 feet mid-morning before easing, and Wednesday carries a brief period of steep wind-wave chop that warrants caution. Forecast confidence is high across all three days, so these conditions are unlikely to change significantly.
About the Islamorada Hump
“The Hump” off Islamorada is an underwater seamount that rises sharply into the Gulf Stream — the Florida Keys' signature offshore spot, stacking up blackfin tuna, amberjack, and pelagics where the current piles into the structure. Strong current over a steep bottom means sea state and wind direction make the difference between a comfortable troll and a rough, wet ride.
The outlook below updates every morning from the latest marine model data, with a plain GO / CAUTION / NO-GO call for each day — the same AI rating used in the SeaLegs AI app.
Reading conditions at the Islamorada Hump
The Hump's chop is current-made as much as wind-made. When a fresh breeze opposes the north-flowing Gulf Stream over the seamount, seas stand up steeper than the raw wave height suggests — so treat a wind-against-current day with more respect than the numbers alone would earn. Wind with the current, by contrast, can make a moderate forecast fish comfortably.
The run from Islamorada is short compared to a Northeast canyon trip, which makes the Hump forgiving on timing — but afternoon sea-breeze build is a daily rhythm in the Keys, and the calmest water is usually the early window. Check the day cards above for when each day's window opens and closes.
Islamorada Hump forecast FAQ
Where is the Islamorada Hump?
The Hump is an underwater seamount offshore of Islamorada in the Florida Keys, where the bottom rises steeply into the path of the Gulf Stream. The strong current over the structure concentrates bait and pelagic fish.
How often is this Islamorada forecast updated?
The forecast on this page is rebuilt every morning from the latest marine model data, and the SpotCast card refreshes live in your browser. The date stamp above the outlook shows when it was last generated.
What do GO, CAUTION, and NO-GO mean?
GO means conditions are favorable for most recreational boats. CAUTION means marginal — manageable for experienced crews, but check wind direction against the current before committing. NO-GO means conditions are hazardous for small craft and the trip is best postponed.
Can I get a forecast like this for my own spot?
Yes. In the free SeaLegs AI app you can drop a pin anywhere — a patch reef, a wreck, or your dock — and get the same AI-rated marine forecast, plus fishing reports and trip planning.
More offshore forecasts
Get this forecast for your own spot
Drop a pin on any spot on planet Earth in the free SeaLegs AI app — AI marine forecasts, fishing reports, and trip planning, rated GO / CAUTION / NO-GO.
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