Diving atJack Macdonald Reef (United States)
Unlike purely natural formations, Jack Macdonald Reef presents a purpose-built underwater habitat off Martin County, Florida. Serving as one of six prominent artificial reefs in the South County area, this site was strategically deployed in 2008 to enhance marine ecosystems. It forms part of a broader network designed for both ecological benefit and diver exploration.
Midday environmental data at Jack Macdonald Reef reports an ambient temperature of 29.5°C. Surface tracking indicates wave heights of approximately 0.6 m. This summarizes the present water and weather conditions.
Dive Site Location & Key Facts
Everything you need to know about this dive site.
Dive Site Overview
The submerged structure of Jack Macdonald Reef provides a substantial artificial environment, sitting consistently in approximately 19.8 m (65 ft) of water. Part of a planned initiative, this reef measures roughly 45.7 m (150 ft) in diameter.
It contributes significantly to the South County artificial reef system, strategically placed about 183 m (600 ft) from neighboring sites like Ann Marie Reef and The Heap. Divers will find the site composed of various fish-friendly materials, specifically 44 concrete deck sections, along with structural concrete, pipe, and other recycled elements.
This intricate composition creates between 3 to 6 m (10 to 20 ft) of vertical relief from the seabed, offering diverse nooks and crannies for marine inhabitants. Each site received over 150,000 tons of material, deployed during a concentrated period in June 2008.
Jack Macdonald Reef
Conditions are Excellent
Best Dive Window
07:00 - 14:00
Optimal conditions expected
Current conditions near Jack Macdonald Reef show 30° air, 29° sea temperature, 0.3 m waves, and 8 km/h wind. Forecast data is refreshed regularly to ensure accuracy.
Best Time to Dive
Optimal diving conditions often contrast significantly throughout the year at Jack Macdonald Reef. The months of May through August generally present good diving opportunities, marked by lower wave heights, averaging 0.5-0.8 m (1.6-2.6 ft), and calmer winds around 23.9-27.8 km/h (14.8-17.3 mph). During this period, air temperatures are comfortably warm, ranging from 26-28.5°C (79-83°F). Conversely, October sees a dip to 'Poor' dive scores due to increased wave action, averaging 1.6 m (5.2 ft). Water temperature data is not consistently reported for this specific site; however, general conditions suggest warmer waters align with the warmer air temperatures. Rain levels typically peak in September, but remain manageable across most other 'Moderate' rated months.
PEAK SEASON SCORE
Scores combine air & water temps, waves, wind & rainfall for overall conditions.
BEST MONTHS TO DIVE
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
Exploring the depth profile of Jack Macdonald Reef reveals a site sitting consistently in about 19.8 m (65 ft) of water. This consistent depth makes it readily accessible for recreational divers. Structural relief, ranging from 3 to 6 m (10 to 20 ft), means divers will encounter vertical elements that rise from the bottom, creating intricate swim-throughs and sheltered areas. While specific current or visibility data is limited for this particular reef, conditions can vary depending on regional weather patterns and tidal influences. Encounters with currents are possible, necessitating good buoyancy control. Visibility fluctuates, but often provides clear views of the concrete and pipe structures that form the reef. As an artificial environment, it provides a distinct diving experience compared to natural coral formations.
Dive Difficulty & Safety Guidelines
Navigating an artificial reef like Jack Macdonald demands careful adherence to safety protocols. Given the structural nature of the reef, divers should maintain excellent buoyancy control to avoid contact with the various concrete and pipe components, which could pose entanglement risks. Always be aware of your surroundings, especially when exploring areas with significant relief. Local regulations regarding fishing, lobstering, and spearfishing can vary for artificial reefs; divers should inquire about current rules before entering the water. As with all dives, a thorough pre-dive check, a reliable dive buddy, and conservative dive planning are essential.
Recommended Equipment
- Dive Computer
This gear list is based on verified equipment signals for Jack Macdonald Reef, United States. Always confirm final gear choices with your dive operator, guide, or liveaboard.
Recommended Dive Suit
2-3mm shorty or light wetsuit is often considered an appropriate level of exposure protection for conditions like these. A hood or vest is suggested for sensitive divers due to surface winds.
Current readings at Jack Macdonald Reef show water temperatures near 29°C (83°F). Surface air temperatures are resting at 30°C (85°F).
A modest cooling trend is expected in the upcoming forecast. Cooler days are ahead; you might want a warmer option for later in the week. Having a second exposure option available is often a good precaution.
Due to technical issues with our weather providers, data hasn't been fetched for over 48 hours. 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 Jack Macdonald Reef.
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
Divers Alert Network
Diving emergency assistance available through DAN World.
+1-919-684-9111- 24/7 emergency hotline
- Diving medical assistance
- Evacuation coordination
Emergency contacts are provided for reference. Always verify local emergency services before diving.
Marine Life at Jack Macdonald Reef
Focusing on marine life, Jack Macdonald Reef acts as a significant aggregation point for various species drawn to its intricate structures. The concrete and pipe materials provide shelter and surfaces for colonization, fostering a localized ecosystem. Divers can anticipate observing numerous fish species utilizing the reef as a refuge and hunting ground. Expect to find a variety of smaller reef fish inhabiting crevices, alongside larger pelagic species that may cruise the perimeters. The artificial reef successfully draws marine life, contributing to the biodiversity of the area.
Dive Sites Near Jack Macdonald Reef
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Dive Centers Near Jack Macdonald Reef
Working Hours
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Neptunes Scuba Academy
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Frequently Asked Questions
What is the typical depth of Jack Macdonald Reef?
Jack Macdonald Reef typically sits in about 19.8 m (65 ft) of water. Its structural relief rises 3 to 6 m (10 to 20 ft) from the seabed, making it suitable for recreational diving.
When were the materials for the reef deployed?
The materials forming Jack Macdonald Reef were deployed between June 11-20, 2008. As part of a larger effort, a network of artificial reefs was created in the South County area during this period.
What kind of materials make up the reef?
The reef is primarily constructed from 44 concrete deck sections. It also incorporates other fish-friendly materials such as structural concrete, pipe, and various recycled components, amounting to over 150,000 tons of material.
What are the best months for diving this site?
The months of May through August generally offer the best diving conditions, characterized by lower waves, calmer winds, and warm air temperatures. Dive scores during this period are typically rated as 'Good'.
Is visibility generally good at Jack Macdonald Reef?
Specific visibility data for Jack Macdonald Reef is not consistently reported. However, like many coastal sites, visibility can vary based on local weather conditions, currents, and recent rainfall. Divers should expect fluctuating conditions.
Is this reef part of a larger artificial reef program?
Yes, Jack Macdonald Reef is one of six reefs in the South County artificial reef area, part of the broader Martin County Artificial Reef Program. These reefs are designed to enhance marine habitat and provide dive opportunities.
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Jack Macdonald Reef
Conditions are Excellent
Best Dive Window
07:00 - 14:00
Optimal conditions expected
Current conditions near Jack Macdonald Reef show 30° air, 29° sea temperature, 0.3 m waves, and 8 km/h wind. Forecast data is refreshed regularly to ensure accuracy.