Vermilion Reef is an advanced boat dive site in South Carolina, United States with depths of up to 32 m (105 ft). Typically most favorable Jul · from 3 years of archive data. Divers commonly see Greater amberjack, Gag grouper, and Black sea bass. Recent reports put the water around 28°C (82°F). Check the latest conditions and entry details before you go.
Marine model · graded 14h ago
0.8 mwaves — under a meter expected
Tap a factor for its source and model point · Forecast 28°C · seasonal avg 27°C
Site hazards: Long boat rides are the dominant logistical hazard
Source: Open-Meteo marine · model point 11 km from site · graded 14h ago
Forecast only — always assess conditions on site.
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: Greater amberjack, Gag grouper, Black sea bass
Best time: May through October is the prime window for both SC and GA (SCDNR cites May-Oct as the most popular diving months; Charleston operators cite late spring to early fall, best May-Oct). Gray's Reef is dived year-round but most commonly April-November, with visibility often peaking in the coldest months and early summer. Surface water temps run roughly low-to-mid 80s F in summer down to low 50s F in winter (SCDNR: mid-80s summer / low 50s winter); offshore water peaks in the upper 70s-low 80s from June on.
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.
Jan
29%19°C1.7 m
Feb
33%19°C1.8 m
Mar
24%19°C1.8 m
Apr
51%21°C1.6 m
May
52%24°C1.5 m
Jun
57%26°C1.3 m
Jul
76%28°C1.2 m
Aug
53%28°C1.5 m
Sep
44%27°C1.8 m
Oct
23%25°C1.9 m
Nov
37%24°C1.6 m
Dec
25%21°C1.9 m
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.
Artificial reef built from Approximate Center of Reef
reef
Long boat rides are the dominant logistical hazard — most SC offshore wrecks lie 20-30+ nm offshore (some sites up to ~35 miles / SCDNR), translating to 2.5-3 hour transits to deeper wrecks like the Hebe off Murrells Inlet; GA reefs are generally closer (6-23 nm, with SAV ~6 nm off Tybee and KC ~9 mi off Wassaw), though deepwater experimental reefs sit 50-70 nm out. Visibility is highly variable and weather/tide-dependent: inshore and nearshore water can be murky (Charleston harbor and inshore reefs frequently 10-30 ft, occasionally measured in inches in the Cooper River), while offshore sites average 40-60 ft and can exceed 80 ft when Gulf Stream water spins inshore; Gray's Reef ranges from as little as 2 ft to ~65 ft. Current is a real concern — Gulf Stream influence and tidal flow drive drift conditions (drift diving is the recommended/required technique at Gray's Reef since anchoring is prohibited). Other hazards: entanglement in monofilament fishing line and lost rigging on these heavily fished structures; summer thunderstorms that build quickly offshore; cooler thermoclines at depth; and the offshore exposure itself (sea state can change during the long run back). Reef marker/nun buoys are not to be tied to (federal penalties in SC), and boaters risk fouling anchors on structure.
GearSummer (water mid-70s to mid-80s F): a 3mm full wetsuit is typically sufficient; even when thermal protection is marginal, a dive skin or 3mm is recommended for abrasion protection against wrecks and structure, and a hood is useful for those who chill easily. Cooler/shoulder seasons and winter (water down to ~50s F): step up to a 7mm wetsuit (with hood/gloves) or a drysuit. Expect a thermocline at depth on offshore wrecks (60-90 ft profiles in SC; ~65 ft at Gray's Reef). A surface marker buoy / safety sausage is strongly advised given drift conditions and currents.
Suggested certAdvanced Open Water + Deep specialty recommended (30-40 m / 100-130 ft)
How deep is Vermilion Reef?
Vermilion Reef reaches a maximum depth of 32 metres (105 feet) — a deep dive at its limit. It is a saltwater site rated as advanced difficulty. Depths vary across the site, so plan your profile to your training and verify conditions locally.
Is Vermilion Reef a shore dive or a boat dive?
Vermilion Reef is a boat dive — access is by boat rather than from shore. No facilities are recorded at the site, and cell service is recorded as good. Entry details and parking notes, where known, are listed in the access section of this page.
Can beginners dive Vermilion Reef?
Vermilion Reef is rated as advanced difficulty, which may not suit new divers. Listed maximum depth is 32 metres (105 feet). Access is by boat. Consider your experience level, conditions, and local guidance before planning.
When is the best time to dive Vermilion Reef?
May through October is the prime window for both SC and GA (SCDNR cites May-Oct as the most popular diving months; Charleston operators cite late spring to early fall, best May-Oct). Gray's Reef is dived year-round but most commonly April-November, with visibility often peaking in the coldest months and early summer. Surface water temps run roughly low-to-mid 80s F in summer down to low 50s F in winter (SCDNR: mid-80s summer / low 50s winter); offshore water peaks in the upper 70s-low 80s from June on. Conditions vary, so check the latest reports and forecasts on the dive site page before your trip.
What will I see at Vermilion Reef?
Divers at Vermilion Reef in United States commonly report sightings of Greater amberjack, Gag grouper, Black sea bass, Great barracuda, and Sand tiger shark. Greater amberjack, Gag grouper, Black sea bass, and Great barracuda are recorded as common sightings, while Sand tiger shark is reported only occasionally. Marine life varies by season and conditions—check the site page for recent diver observations and photos.
What hazards are recorded at Vermilion Reef?
Long boat rides are the dominant logistical hazard: most SC offshore wrecks lie 20-30+ nm offshore (some sites up to ~35 miles / SCDNR), translating to 2.5-3 hour transits to deeper wrecks like the Hebe off Murrells Inlet; GA reefs are generally closer (6-23 nm, with SAV ~6 nm off Tybee and KC ~9 mi off Wassaw), though deepwater experimental reefs sit 50-70 nm out. Visibility is highly variable and weather/tide-dependent: inshore and nearshore water can be murky (Charleston harbor and inshore reefs frequently 10-30 ft, occasionally measured in inches in the Cooper River), while offshore sites average 40-60 ft and can exceed 80 ft when Gulf Stream water spins inshore; Gray's Reef ranges from as little as 2 ft to ~65 ft. Current is a real concern — Gulf Stream influence and tidal flow drive drift conditions (drift diving is the recommended/required technique at Gray's Reef since anchoring is prohibited). Other hazards: entanglement in monofilament fishing line and lost rigging on these heavily fished structures; summer thunderstorms that build quickly offshore; cooler thermoclines at depth; and the offshore exposure itself (sea state can change during the long run back). Reef marker/nun buoys are not to be tied to (federal penalties in SC), and boaters risk fouling anchors on structure. Hazards and conditions change, so verify current local information before diving.
Reviews
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