Scuba Diving at Carysfort Reef Light

Diving atCarysfort Reef Light (United States)

Carysfort Reef Light stands as an enduring sentinel over one of the Florida Keys' most biologically rich coral ecosystems. This historic iron lighthouse, completed in 1852, protected ships from the shallow, hazardous ridges below for generations. Today, it marks a significant Sanctuary Preservation Area, offering divers a glimpse into a vibrant underwater world just a short boat ride from Key Largo. Its skeletal structure provides a striking topside landmark for a captivating reef.

Evening condition tracking at Carysfort Reef Light features an air temperature of 28°C. We have recorded wave heights measuring 0.4 m during this period. These figures outline the environmental parameters currently present.

Dive Site Location & Key Facts

Everything you need to know about this dive site.

Max Depth5m / 16ft
Entry Typeboat
Water Typesalt
Dive Types
Reef

Dive Site Overview

Exploring Carysfort Reef Light reveals a dynamic 'double reef' configuration within the Florida Keys National Marine Sanctuary. Close to the lighthouse, extensive shallow coral formations are ideal for snorkelers and newer divers.

These vibrant sections, frequently around 5 m (18 ft) deep, allow full-spectrum color penetration, creating a truly cinematic experience as sunlight dances through the water. Further offshore, the reef structure evolves into a labyrinth of under-ridges, gullies, and occasional swim-through tunnels.

Massive star corals loom over these deeper sections, which can extend to around 24 m (80 ft) for certified divers seeking broader exploration. The site lies within the Key Largo Existing Management Area, northeast of The Elbow, emphasizing its protected status and ecological importance.

It's considered one of the most developed reef systems in the Keys, providing diverse experiences for various skill levels.

Carysfort Reef Light

Conditions are Excellent

9/10
Confidence: 8/10
Indicates meteorological model agreement and data availability.

Best Dive Window

07:00 - 14:00

Optimal conditions expected

06:12
18:45
H: 10:45
L: 16:20
Air / Sea Temp
28° / 29°
Wave Height
0.2 m
Wind Speed
11 km/h ESE
Rain Chance
50%

Current conditions near Carysfort Reef Light show 28° air, 29° sea temperature, 0.2 m waves, and 11 km/h wind. Forecast data is refreshed regularly to ensure accuracy.

Radius: ~12km
Updated: Jun 11, 2026, 23:37 local time
MARINE: OPEN-METEOWEATHER: YR.NO

Best Time to Dive

For a truly exceptional dive experience at Carysfort Reef Light, planning your visit between February and September generally aligns with 'Good' dive scores. Months like February (air temp averaging 22°C / 72°F), May (26.5°C / 80°F), and July (29°C / 84°F) often present favorable conditions, including lower wave heights and lighter winds. Rain activity tends to be minimal during these periods, particularly in February, April, and May, which enhances visibility. During the late summer months of July, August, and September, air temperatures are at their warmest, contributing to a comfortable overall experience. Conversely, months like December and March typically show higher wave heights and stronger winds, which can impact surface conditions and overall comfort.

PEAK SEASON SCORE

82/100
Very Good

Scores combine air & water temps, waves, wind & rainfall for overall conditions.


BEST MONTHS TO DIVE

MAY
JUL
AUG
DIVE SCORE
(0–100)
70
JAN
73
FEB
71
MAR
72
APR
81
MAY
76
JUN
85
JUL
80
AUG
80
SEP
68
OCT
69
NOV
64
DEC
AIR TEMP (°C)
22
22
24
25
27
28
29
29
29
27
25
24
WAVES (M)
1.0
0.9
1.0
1.0
0.7
0.7
0.6
0.7
0.7
1.0
1.1
1.1
WIND (KM/H)
32
30
30
31
26
27
22
24
25
31
32
33
RAIN (MM)
1.5
1.5
2.7
1.6
1.6
7.2
2.7
4.7
5.1
4.8
2.2
5.2
DIVE SCORE GUIDE (0–100)
Excellent (90–100)
Very Good (80–89)
Good (70–79)
Moderate (50–69)
Poor (30–49)
Not Recommended (0–29)

Monthly records compiled from satellite and marine observation nodes over the last 3 years. Data provided by Open-Meteo and MET Norway.

Dive Experience & Conditions

Approaching Carysfort Reef Light, divers find conditions generally conducive for various experience levels. The area immediately surrounding the lighthouse is characterized by shallow, clear water, with typical depths around 5 m (18 ft), making it very accessible for snorkelers and open water divers. Visibility often proves excellent, allowing for extended exploration of the intricate coral formations. While minimal currents drift over the shallower reef, conditions can vary, particularly with changing weather patterns. The broader reef system beyond the immediate light structure offers deeper sections for certified divers, potentially reaching up to 24 m (80 ft). Navigating the reef's under-ridges and gullies provides an immersive experience, even for those new to reef diving. Water temperatures, while not consistently reported with exact values, are typically warm, characteristic of the Florida Keys, though recent years have seen periods of elevated temperatures affecting coral health.

Dive Difficulty & Safety Guidelines

Diving at Carysfort Reef Light requires adherence to the special regulations governing its status as a Sanctuary Preservation Area (SPA). The area is situated within the Florida Keys National Marine Sanctuary, which necessitates respecting all established guidelines to protect this fragile ecosystem. Its relatively shallow depths and generally clear conditions make it suitable for novice divers and snorkelers, though proper training and responsible diving practices are always essential. There are no specific hazards commonly reported beyond those inherent to open water diving, such as boat traffic. Divers should maintain neutral buoyancy to avoid contact with coral structures and ensure they stay within recreational depth limits appropriate for their certification. Respecting marine life and leaving no trace is paramount to preserving the site.

Recommended Equipment

  • Dive Computer
  • DSMB

This gear list is based on verified equipment signals for Carysfort Reef Light, United States. Always confirm final gear choices with your dive operator, guide, or liveaboard.

Recommended Dive Suit

Divers who spend more time observing marine life often prefer slightly warmer gear.

Environmental readings suggest that the waters surrounding Carysfort Reef Light are about 29°C (85°F) at the moment. Surface air temperatures are resting at 28°C (82°F). Water temperatures in this range are often well suited to diving with dive skin or rash guard.

Forecast models indicate that diving conditions should remain largely unchanged.

Carysfort Reef Light conditions last reviewed: 23:37 local time (UTC-5), Jun 11, 2026

Due to technical issues with our weather providers, live updates are temporarily delayed. The data above reflects the conditions at the time of the last successful fetch.

Emergency & Medical Support

Essential information to help you plan your dive trip to Carysfort Reef Light.

Hyperbaric Chamber

Hyperbaric chambers are a critical part of dive safety infrastructure. Availability varies significantly by region, and not all dive areas have immediate access.

Before diving, it's recommended to:

  • confirm nearest medical facilities
  • check emergency procedures with local dive operators
  • ensure dive insurance covers evacuation if required
24/7 Available

Divers Alert Network

Diving emergency assistance available through DAN World.

+1-919-684-9111
  • 24/7 emergency hotline
  • Diving medical assistance
  • Evacuation coordination
View official DAN emergency contacts

Emergency contacts are provided for reference. Always verify local emergency services before diving.

Marine Life at Carysfort Reef Light

Diving here reveals diverse marine patterns. You'll observe reef fish surging in schools, parrotfish grazing across coral surfaces, and graceful turtles gliding over ridges. Angelfish frequently flicker through sea fan clusters. The reef hosts a rich array of star coral formations, particularly in deeper areas, and broad expanses of elkhorn coral characterize Carysfort South, making it a visually rich encounter.

Image contributors:Ewa Barska
Want to contribute photos or local dive knowledge? Learn how to contribute

Dive Centers Near Carysfort Reef Light

Amoray Dive Center LLC
20.2 km away

Amoray Dive Center LLC

4.9| 179 reviews
Today: 07:30 - 18:30
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Mon07:30 - 18:30
Tue07:30 - 18:30
Wed07:30 - 18:30
Thu07:30 - 18:30
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Sat07:30 - 18:30
Pirates Cove Watersports

Pirates Cove Watersports

4.8| 855 reviews
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Key Largo Scuba Diving

Key Largo Scuba Diving

4.6| 123 reviews
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Rainbow Reef Dive Center

Rainbow Reef Dive Center

4.5| 1035 reviews
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Key Largo Dive Center

Key Largo Dive Center

27.2 km 4.3· 202 reviews
Capt. Slate's Scuba Adventures

Capt. Slate's Scuba Adventures

40.4 km 4.6· 257 reviews

Nearest Airports

Nearest airports to help plan travel to this dive area.

Miami International AirportMIA
64 km
Miami-Opa Locka Executive AirportOPF
76 km
Fort Lauderdale Hollywood International AirportFLL
95 km
💵Currency:USD

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Frequently Asked Questions

What is the typical maximum depth for diving at Carysfort Reef Light?

The immediate vicinity of Carysfort Reef Light typically offers depths around 5 meters, ideal for snorkelers and new divers. However, the broader Carysfort Reef system can extend to around 24 meters for more experienced, certified divers.

Is Carysfort Reef Light suitable for snorkelers?

Yes, Carysfort Reef Light is highly recommended for snorkelers. Its shallow, clear waters and abundant coral formations provide an excellent opportunity to experience marine life from the surface. The site is often praised for its exceptional clarity and color.

What kind of coral can I expect to see at Carysfort Reef?

Divers and snorkelers can expect to see a proliferation of shallow corals, including significant expanses of elkhorn coral (Acropora palmata) in areas like Carysfort South. Offshore sections feature massive star corals (Montastraea cavernosa) amidst ridges and gullies.

Are there any special regulations for diving at Carysfort Reef Light?

Yes, Carysfort Reef Light is part of a Sanctuary Preservation Area (SPA) within the Florida Keys National Marine Sanctuary. Special regulations apply to protect its sensitive marine ecosystem, emphasizing responsible interaction and no-take rules.

Is Carysfort Reef Light a good spot for new divers?

Absolutely. The shallower sections around the lighthouse, with their manageable depths and typically good visibility, are well-suited for open water certified divers and those looking for a comfortable introduction to reef diving in the Florida Keys.

What marine life is commonly seen at Carysfort Reef?

Common sightings include a variety of reef fish, parrotfish, turtles, and angelfish. The vibrant coral structures also support a diverse range of smaller aquatic creatures, adding to the visual spectacle.

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