DivePlnr
    Jackson Blue Spring dive site
    cave
    Florida Keys, United States

    Jackson Blue Spring

    Best months: Apr–Jun

    Why dive here

    With 87+ marine species recorded in the area - including bull sharks, dolphins, hammerhead sharks, seahorses and sea turtles - Jackson Blue Spring offers some of Florida Keys's richest cave diving. Water ranges 19-32°C, warmest July, August, September.

    Best timeApr–Jun
    WetsuitA 3mm shorty or thin full wetsuit
    Marine lifeBull Sharks, Dolphins, Hammerhead Sharks, Seahorses and Sea Turtles · 87+ species recorded
    Water19-32°C · warmest July, August, September
    CharacterCave dive
    StandoutRich in charismatic marine life

    Jackson Blue Spring, up near Marianna, offers a cool freshwater escape from the usual ocean dives. We've always appreciated its straightforward cavern zone, opening up into a clean, white limestone cave system. The visibility in there is generally excellent, letting you really take in the rock formations and the quiet stillness of the place. Keep an eye out for those Freshwater Flounder hugging the bottom, or the occasional Longnose Gar gliding by. It’s a solid pick for divers looking to experience a clear, calm cave environment without needing deep cave penetration skills.

    Safety Notes

    Overhead environment - never enter without proper cave/cavern training, redundant equipment, and a guideline.

    Today05:4017:1611h 36m daylightGolden hour 16:44

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    Conditions

    Ocean conditions, forecast and tides for Jackson Blue Spring

    Jackson Blue Spring Ocean Conditions

    Monthly averages for Jackson Blue Spring, sourced from NOAA NDBC + Copernicus Marine (EU) - nearest station: 8725520 - Fort Myers, FL (28km away)

    ExcellentGreatGoodFairPoor★Best monthsThis month

    October Averages

    Sea Temperature

    27°C

    81°F · Range: 20.9–31.1°C

    Air Temperature

    26°C

    79°F

    Current Speed

    0 cm/s

    Direction: S (180°)

    Salinity

    35.98 PSU

    Wind Speed

    2.7 m/s

    5.2 knots

    Atmospheric Pressure

    1014.5 hPa

    Based on 5 years of monitoring data · Data sources: NOAA NDBC + Copernicus Marine (EU)

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