Diving atEternal Reef 23 (United States)
Eternal Reef 23 acts as a vibrant new habitat for marine species, attracting a diverse array of fish, crabs, and sessile organisms. These carefully engineered reef balls, initially placed as memorials, rapidly develop into thriving ecosystems. Divers will observe how concrete structures evolve, transforming into complex micro-environments that shelter and sustain local marine populations. It's an evolving underwater landscape where life finds a foothold on purpose-built structures.
Current morning readings from Eternal Reef 23 indicate an air temperature of 24.5°C. Surface wave heights are averaging around 0.2 m at this time. These local measurements provide a baseline for your daily dive planning.
Dive Site Location & Key Facts
Everything you need to know about this dive site.
Dive Site Overview
Descending to the On Eternal Patrol Memorial Reef at Eternal Reef 23 offers a profound dive into a site with dual significance. This location serves as a living memorial, honoring 65 American submarines lost since 1915, along with two additional tributes to the USSVI and other lost submariners.
Each of the 67 reef balls, weighing approximately 816 kg (1,800 lbs), is a meticulously crafted artificial reef, designed to support marine ecosystems while providing a permanent tribute. Initially deployed between May and October 2019, these structures were thoughtfully oriented to face west, mirroring the solemn protocol of national cemeteries. Early observations documented significant marine growth within months of placement, indicating the rapid establishment of new habitats.
Divers encounter these concrete memorials arranged in ordered rows and columns, creating an organized, yet biologically dynamic, underwater landscape. Exploring this site means witnessing nature reclaiming human-made structures, transforming them into vital havens for diverse species.
It's a respectful experience, observing both the intentional design and the spontaneous emergence of marine life.
Eternal Reef 23
Conditions are Good
Best Dive Window
07:00 - 14:00
Optimal conditions expected
Current conditions near Eternal Reef 23 show 24° air, 29° sea temperature, 0.1 m waves, and 14 km/h wind. Forecast data is refreshed regularly to ensure accuracy.
Best Time to Dive
Planning a visit to Eternal Reef 23 requires considering the seasonal conditions that impact visibility and overall dive comfort. The best period typically falls between May and August, when average wave heights are at their lowest, often around 0.4 to 0.6 m (1.3 to 2.0 ft). During July, conditions are frequently excellent, with lower wind speeds averaging 14.45 km/h (9 mph), minimizing surface chop and improving light penetration. Air temperatures during these warmer months range from 26-28°C (79-82°F). While water temperature isn't consistently reported, it generally aligns with warm offshore Florida averages during these periods. Rain averages tend to be higher from June through September, yet brief summer showers often don't significantly degrade underwater clarity for extended durations. For optimal surface conditions and underwater visibility, targeting days with minimal wind and wave action during this late spring to mid-summer window is usually advisable.
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
Diving Eternal Reef 23 provides a distinct sensory journey through a structured underwater environment. Descending, divers notice the orderly rows and columns of individual reef balls, each intentionally facing west, creating an unusual visual symmetry against the ocean floor. The structures themselves, made of environmentally-safe concrete, offer numerous crevices and surfaces for marine life to colonize. Within months of their deployment, significant growth was already apparent, including various encrusting organisms and small fish sheltering within the reef balls' apertures. Calm conditions often prevail during optimal months, making for a relaxed exploration of the site. Depths are suitable for recreational divers, allowing ample bottom time to appreciate the evolving ecosystem on these unique memorials. The sensation is one of both respectful contemplation and active exploration of a thriving artificial habitat.
Dive Difficulty & Safety Guidelines
Approaching Eternal Reef 23 requires divers to maintain strong situational awareness and strict buoyancy control. While the site does not present specific hazards beyond standard diving considerations, its unique nature as a memorial reef necessitates particular respect. Divers should avoid touching the reef balls, both to preserve the delicate marine growth and to honor the purpose of the site. Since the reef balls are spaced approximately 1.2 m (4 ft) apart, careful navigation is important to prevent accidental contact. It's also advisable to monitor local weather and current reports; even with calm conditions prevalent, ocean environments can shift. Planning dives with a buddy and adhering to established dive plans ensures a safe and meaningful exploration of this distinctive underwater memorial.
Recommended Equipment
- Dive Computer
This gear list is based on verified equipment signals for Eternal Reef 23, United States. Always confirm final gear choices with your dive operator, guide, or liveaboard.
Recommended Dive Suit
Conditions in the coming days are expected to stay within a similar temperature range.
Many experienced divers would consider dive skin or rash guard an appropriate choice here.
Recent environmental data from Eternal Reef 23 indicates water temperatures near 29°C (84°F). Surface air temperatures are resting at 24°C (76°F).
Emergency & Medical Support
Essential information to help you plan your dive trip to Eternal Reef 23.
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 Eternal Reef 23
The underwater landscape of Eternal Reef 23 quickly transformed into a vibrant home for various marine species. These concrete reef balls, designed with ample surface area and internal voids, provide immediate shelter and attachment points. Within a few months of placement, observers documented significant marine growth, indicating rapid colonization. Divers commonly encounter numerous fish species utilizing the structures for refuge, alongside crabs, sea urchins, and an array of sponges. Early coral growth is also noted, transforming the uniform memorials into textured, living components of the marine environment. Each reef ball becomes a miniature ecosystem, supporting a dynamic community against the backdrop of the ocean floor.
Dive Sites Near Eternal Reef 23
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Dive Centers Near Eternal Reef 23
Working Hours
Today: 09:00 - 17:00
Coral Diving Club, LLC
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Divers Cove
South Florida Diving Headquarters
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Frequently Asked Questions
What is the purpose of Eternal Reef 23?
Eternal Reef 23 is part of the 'On Eternal Patrol Memorial Reef,' a living memorial honoring 65 American submarines lost since 1915, plus additional tributes. It simultaneously functions as an artificial reef, actively supporting and enhancing marine biodiversity.
What does the dive site consist of?
The site comprises 67 individual reef balls, each weighing about 816 kg (1,800 lbs) and constructed from environmentally-safe concrete. These structures are arranged in orderly rows and columns, spaced 1.2 m (4 ft) apart, all oriented to face west.
When were the reef balls deployed?
Deployment of the reef balls took place in several stages, spanning from May to October 2019. An underwater ribbon-cutting ceremony in November 2019 marked the official opening of the 'On Eternal Patrol Memorial Reef'.
What marine life can be seen at Eternal Reef 23?
Significant marine growth was observed soon after the reef balls' deployment, including various fish species, crabs, sea urchins, and a range of sponges. Developing coral colonies also contribute to the site's evolving marine ecosystem.
Are there any special considerations for diving this memorial site?
Divers should exercise excellent buoyancy control and refrain from touching the reef balls to preserve marine growth and respect the site's memorial nature. Careful navigation between the closely spaced structures is also advised.
Is Eternal Reef 23 suitable for all certified divers?
With depths suitable for recreational diving, the site generally accommodates most certified divers. The often calm conditions during optimal months provide an accessible and respectful exploration experience for various skill levels.
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Eternal Reef 23
Conditions are Good
Best Dive Window
07:00 - 14:00
Optimal conditions expected
Current conditions near Eternal Reef 23 show 24° air, 29° sea temperature, 0.1 m waves, and 14 km/h wind. Forecast data is refreshed regularly to ensure accuracy.