Forty Fathom Grotto
Why dive here
With 142+ marine species recorded in the area - including dolphins, octopuses, seahorses, sea turtles and mantis shrimp - Forty Fathom Grotto offers some of Florida Springs's richest cave diving. Water ranges 16-31°C, warmest June, July, August.
Forty Fathom Grotto offers cavern and cave diving in the Florida Springs system. We’ve found the main draw here is the grotto itself, a massive, dark opening leading into more extensive cave networks for properly trained divers. It's a challenging spot, best suited for experienced divers looking to explore overhead environments rather than a casual swim-through. Visibility can vary, but generally holds up well within the grotto.
Safety Notes
Overhead environment - never enter without proper cave/cavern training, redundant equipment, and a guideline.
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Conditions
Ocean conditions, forecast and tides for Forty Fathom Grotto
Forty Fathom Grotto Ocean Conditions
Monthly averages for Forty Fathom Grotto, sourced from Copernicus Marine Service (EU)
October Averages
Sea Temperature
26°C
78°F · Range: 19.7–27.7°C
Air Temperature
22°C
72°F
Current Speed
2 cm/s
Direction: S (180°)
Salinity
32.94 PSU
Wind Speed
4.3 m/s
8.4 knots
Atmospheric Pressure
1014.6 hPa
Based on 1 years of monitoring data · Data sources: Copernicus Marine Service (EU)
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