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J Reef (JY Reef)

Georgia, United States
AOW suggested17–24 m (55–78 ft) depthBoat entry5mm wetsuit typical

Boat dive — see Entry & access.

J Reef (JY Reef) at a glance

J Reef (JY Reef) is an advanced boat dive site in Georgia, United States with depths of 16.8–23.7 m (55–78 ft). Typically most favorable Jul · from 3 years of archive data. Divers commonly see Red snapper, Sandbar shark, and King mackerel. Recent reports put the water around 22°C (71°F). Check the latest conditions and entry details before you go.

No window today· next: tomorrow 7:00–10:00 · moderate

Forecast for this hour · 16:00 · run 15 h ago
2.5 m (8.1 ft)waves — about two and a half meters expected (waves — about eight feet expected)

Tap a factor for its source and model point · Forecast 22°C · seasonal avg 23°C ( · Forecast 71°F · seasonal avg 74°F)

Site hazards: Current on the wreck (anchor-line descents/ascents advised), jellyfish in the water column, thermocline around 35-40 ft, silt-out risk inside the wreck, seasickness-inducing chop

Read the full hazards ↓

Dive windows this week

Longest window: Fri
MonNo window

2.6 m waves · 23 kn wind (8.4 ft waves · 23 kn wind)

Tue7:00–10:00 moderate, 14:00–17:00 moderate

2.0 m waves · 21 kn wind (6.7 ft waves · 21 kn wind)

Wed7:00–10:00 moderate

2.2 m waves · 23 kn wind (7.2 ft waves · 23 kn wind)

ThuNo window

2.1 m waves · 23 kn wind (6.9 ft waves · 23 kn wind)

Fri7:00–17:00 moderate, 17:00–18:00 favorable

1.7 m waves · 19 kn wind (5.4 ft waves · 19 kn wind)

Sat7:00–17:00 moderate

1.2 m waves · 18 kn wind (4.0 ft waves · 18 kn wind)

SunNo window

1.2 m waves · 20 kn wind (3.8 ft waves · 20 kn wind)

Favorable windowModerate window— no window

Every forecast dive window each day, site-local time, from wave and wind forecasts. Numbers under each bar are daylight averages.

First light 6:09 · Sunrise 6:34 · Sunset 17:39 · some windows run past sunset

Source: Open-Meteo marine · model point 2.8 km from site · updated 26 Oct, 00:25 GMT-5

Forecast only — always assess conditions on site.

Compare this weekend’s windows near J Reef (JY Reef)

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.

Dived here today — did the forecast match?

What Divers Say

Known for: Red snapper, Atlantic spadefish, Great barracuda
Best time: Late spring through early fall on calm days, timed to the tide for best visibility

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. January, 78% of days have historically been favorable, water has typically been 12°C (54°F), waves have typically been 0.8 m (2.6 ft), wind has typically been 17 knots
  2. February, 69% of days have historically been favorable, water has typically been 14°C (57°F), waves have typically been 0.9 m (2.9 ft), wind has typically been 17 knots
  3. March, 72% of days have historically been favorable, water has typically been 17°C (63°F), waves have typically been 0.9 m (2.9 ft), wind has typically been 17 knots
  4. April, 84% of days have historically been favorable, water has typically been 21°C (70°F), waves have typically been 0.9 m (2.9 ft), wind has typically been 16 knots
  5. May, 83% of days have historically been favorable, water has typically been 25°C (77°F), waves have typically been 0.8 m (2.6 ft), wind has typically been 16 knots
  6. June, 84% of days have historically been favorable, water has typically been 28°C (82°F), waves have typically been 0.8 m (2.5 ft), wind has typically been 16 knots
  7. July, 94% of days have historically been favorable, water has typically been 30°C (86°F), waves have typically been 0.7 m (2.2 ft), wind has typically been 15 knots, historically most favorable
  8. August, 81% of days have historically been favorable, water has typically been 30°C (86°F), waves have typically been 0.9 m (2.9 ft), wind has typically been 16 knots
  9. September, 67% of days have historically been favorable, water has typically been 27°C (81°F), waves have typically been 1.1 m (3.6 ft), wind has typically been 17 knots
  10. October, 61% of days have historically been favorable, water has typically been 23°C (74°F), waves have typically been 1.1 m (3.7 ft), wind has typically been 18 knots
  11. November, 72% of days have historically been favorable, water has typically been 20°C (67°F), waves have typically been 0.9 m (2.9 ft), wind has typically been 16 knots
  12. December, 61% of days have historically been favorable, water has typically been 15°C (58°F), waves have typically been 1.0 m (3.3 ft), wind has typically been 17 knots

July has typically 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

Rough labels: “Commonly seen” usually means two or more recorded sightings near this site in public dive logs (GBIF), “Occasionally seen” one; “Seasonal” and “Rarely seen” come from dive-guide research. Not a measured rate.

Fills & rentals nearby

No dive shops mapped within 25 km (16 mi). Know one? Add it to the map.

Data updated June 2026

Site details

An offshore reef area 17.5 nautical miles east of St. Catherines Island combining natural live-bottom ledges with added structure including the upright Coast Guard ship Sagebrush, subway cars, M-60 tanks and a Liberty ship. Bottom depths run 55-75 ft, and the coral-encrusted Sagebrush wreck is the signature dive, reached by roughly 1.5-hour charter runs from marinas such as Fort McAllister in Richmond Hill. Currents, thermoclines and changeable visibility (30-50 ft) make this comparable to Panhandle wreck diving.

boatreefwreck

Current on the wreck (anchor-line descents/ascents advised), jellyfish in the water column, thermocline around 35-40 ft, silt-out risk inside the wreck, seasickness-inducing chop

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