Roatán, Honduras
    Sistema de Humedales de la Isla de Utila

    Diamond Cay

    Best months: Jan–May

    Protected Area

    Sistema de Humedales de la Isla de Utila

    Why dive here

    With 168+ marine species recorded in the area - including barracuda, orcas, sea turtles, whale sharks and pufferfish - Diamond Cay offers some of Roatán's richest cave diving. Water ranges 27-30°C, warmest August, September, October.

    Best timeJan–May
    WetsuitA 3mm shorty or thin full wetsuit
    Marine lifeBarracuda, Orcas, Sea Turtles, Whale Sharks and Pufferfish · 168+ species recorded
    Water27-30°C · warmest August, September, October
    CharacterCave dive
    StandoutExceptional marine biodiversity

    Diamond Cay is one of those Roatán sites we just adore for an easy, rewarding drift. You drop in near a small cay, then let the current carry you along a narrow coral ridge. It’s perfect for divers who love to just float and watch the show. Look out for the resident flamefish darting in and out of the crevices, and we’ve often spotted pygmy filefish camouflaged against the gorgonians. The reef here slopes gently to about 22m, bordered by wide sand channels that make a lovely contrast to the coral. Keep an eye on the sandy patches for sleeper gobies and the occasional milk conch ploughing along. We’d suggest going in the morning; the light filtering through the water really makes the reds and oranges of the sponges pop. The black coral colony at 24m is impressive, but for sheer colour, we love the huge common sea fans further south. You’ll experience a relaxed drift, observing everything from tiny surge clingfish to cruising barracuda, making it a great choice for a second dive of the day.

    Safety Notes

    Overhead environment - never enter without proper cave/cavern training, redundant equipment, and a guideline.

    Today05:4017:3111h 52m daylightGolden hour 17:03

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    Conditions

    Ocean conditions, forecast and tides for Diamond Cay

    Diamond Cay Ocean Conditions

    Monthly averages for Diamond Cay, sourced from Open-Meteo marine data + Copernicus Marine (EU) - nearest station: Open-Meteo marine grid (16.27, -86.6) (5km away)

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    October Averages

    Sea Temperature

    30°C

    86°F · Range: 29–31.6°C

    Current Speed

    1.41 cm/s

    Direction: NW (315°)

    Chlorophyll-a

    0.052 mg/m³

    Very clear (oligotrophic)

    Salinity

    35.96 PSU

    Based on 4 years of monitoring data · Data sources: Open-Meteo marine data + Copernicus Marine (EU)

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