Florida Keys, United States
    Half Moon Underwater Archaeological Preserve

    DEMA Trader

    Best months: Apr–Jun

    Protected Area

    Half Moon Underwater Archaeological Preserve

    Why dive here

    With 87+ marine species recorded in the area - including bull sharks, dolphins, hammerhead sharks, seahorses and sea turtles - DEMA Trader offers some of Florida Keys's richest wreck diving. Water ranges 19-32°C, warmest July, August, September.

    Best timeApr–Jun
    WetsuitA 3mm shorty or thin full wetsuit
    Marine lifeBull Sharks, Dolphins, Hammerhead Sharks, Seahorses and Sea Turtles · 87+ species recorded
    Water19-32°C · warmest July, August, September
    CharacterWreck dive
    StandoutRich in charismatic marine life

    The DEMA Trader wreck is one of those sites we always try to hit when we're in the Upper Keys. What we love about it is the way this old freighter just sits upright and proud on the sand, not too deep, meaning plenty of bottom time to really explore. You can still see the mast structure, and the wheelhouse is a fantastic swim-through, full of the kind of spooky light shafts that make for great photos. Our favourite part is the stern, where the prop is still mostly intact, drawing in Goliath groupers that often just hang out under the rudder, huge and unbothered. Schools of grunts and snapper stream in and out of the cargo holds, and we’ve even spotted nurse sharks tucked away in the darker recesses. It’s a pretty easy dive, not usually much current, making it perfect for divers who want to take their time getting to know a proper shipwreck without any major challenges. We'd suggest getting there early to beat the crowds, as it can get a bit busy on weekends.

    Safety Notes

    Wreck site - avoid penetration without wreck diving certification. Watch for sharp metal and entanglement hazards.

    Today06:1717:5911h 42m daylightGolden hour 17:28

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    Conditions

    Ocean conditions, forecast and tides for DEMA Trader

    DEMA Trader Ocean Conditions

    Monthly averages for DEMA Trader, sourced from NOAA NDBC + Copernicus Marine (EU) - nearest station: 8725520 - Fort Myers, FL (28km away)

    ExcellentGreatGoodFairPoor★Best monthsThis month

    October Averages

    Sea Temperature

    27°C

    81°F · Range: 20.9–31.1°C

    Air Temperature

    26°C

    79°F

    Current Speed

    0 cm/s

    Direction: S (180°)

    Salinity

    35.98 PSU

    Wind Speed

    2.7 m/s

    5.2 knots

    Atmospheric Pressure

    1014.5 hPa

    Based on 5 years of monitoring data · Data sources: NOAA NDBC + Copernicus Marine (EU)

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