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AdvancedShore entry

Blue Grotto Spring

Florida, United States
Open Water suggested3–31 m depthShore entry

Blue Grotto Spring at a glance

Blue Grotto Spring is a advanced shore dive site in Florida, United States with depths of 3–30.5 m (10–100 ft). Typically most favorable Jul · from 3 years of archive data. Divers commonly see Florida softshell turtle, Largemouth bass, and Bluegill. Check the latest conditions and entry details before you go.

Wind model · graded 3h ago
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Tap a factor for its source and model point

Site hazards: Cavern overhead below ~30 ft (large daylight zone considered safe for open water divers, but staying above 60 ft recommended without cavern training); gets dark and silty toward the 100 ft bottom; gated cave section requires full cave certification; solo diving prohibited.

Read the full hazards ↓

Dive windows this week

Best: Sat
Sun7:00–21:00
Mon7:00–21:00
Tue7:00–21:00
Wed7:00–21:00
Thu7:00–21:00
Fri7:00–21:00
Sat7:00–21:00

Favorable windowModerate window— no window

First light 6:20 · Sunrise 6:46 · Sunset 20:26

Source: Open-Meteo wind · graded 3h ago

Forecast only — always assess conditions on site.

Forecast · NOAA tide model

Tide & slack timing

Loading tide predictions

Recent diver reports

Dated firsthand observations from divers — not current conditions.

No diver reports for this site yet. — one dated observation helps every diver after you.

What Divers Say

Known for: Florida softshell turtle, Largemouth bass, Bluegill
Best time: Year-round, 72°F and weather-independent; weekdays are quieter than class-heavy weekends; visibility typically 100 ft+.

Based on community reviews and site data. Conditions vary — always verify before diving.

Best months, historically

What conditions have historically been typical at this site, month by month — not a forecast.

  1. Jan88% 9 kn
  2. Feb91% 9 kn
  3. Mar85% 10 kn
  4. Apr91% 10 kn
  5. May97% 9 kn
  6. Jun90% 9 kn
  7. Jul98% 7 kn
  8. Aug95% 8 kn
  9. Sep96% 8 kn
  10. Oct96% 9 kn
  11. Nov93% 8 kn
  12. Dec92% 9 kn

July hastypically had the largest share of favorable days here. Conditions vary year to year — this is historical context, not a forecast.

Based on 3 years of archive data. Bar height shows the share of days each month whose conditions have historically scored favorably.

Marine life seen at this site

Species noted at this site — not a promise of what you’ll encounter.

Species seen here

  • Florida softshell turtleCommonly seen
  • Largemouth bassCommonly seen
  • BluegillCommonly seen
  • Channel catfishOccasionally seen
  • Koi/goldfish (introduced)Occasionally seen
  • CrayfishOccasionally seen
  • Freshwater eelRarely seen

Fills & rentals nearby

Facts from OpenStreetMap, corrected by the community — listed by distance only. Details change; confirm with the shop.

Shop facts come from OpenStreetMap and community corrections, shown nearest first. PickADive lists facts and contacts only — no listing is sponsored or ranked.

Site details

Blue Grotto is a privately operated sinkhole/cavern dive resort in Williston and one of Florida's most popular training sites. A huge daylight-zone cavern descends along permanent heavy-duty guidelines to about 100 ft, with crystal-clear water, a famous compressor-fed air bell at 30 ft, and a resident softshell turtle named Virgil. Amenities include docks, staging decks, rental gear, fills and on-site lodging.

cavecenoteshore

Cavern overhead below ~30 ft (large daylight zone considered safe for open water divers, but staying above 60 ft recommended without cavern training); gets dark and silty toward the 100 ft bottom; gated cave section requires full cave certification; solo diving prohibited.

Reviews

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