Hugo's Trench is a steep-walled chasm cut into the rocky reef system around Julian Rocks, just off Byron Bay on the NSW North Coast. This open-water site drops to a sand-floored canyon at around 16 m max depth, with average depths of 8–10 m making it accessible for confident snorkelers and divers alike. The trench is sculpted with narrow gaps, overhangs, and boulder-strewn gutters that harbour wobbegong sharks, peacock sole, octopus, and dwarf lionfish. Grey nurse sharks, turtles, and colourful nudibranchs are regular sights in the nutrient-rich waters that flow through this marine reserve.
Hugo's Trench
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Showing last known conditions
Wave Height 0.9 mSwell Period 7.0 sWind Speed 4.4 knPrecipitation 0.0 mmTidal Phase flood
Last evaluated
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Community contribution: submitted by Daniel
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Moderate risk: Strong currents
Tidal flows through the trench can create moderate to strong currents, particularly on an outgoing tide around the narrow gaps and rock walls.
Low risk: Boat traffic
The site is accessed by boat and located in an open-water channel used by charter vessels and private craft. Snorkelers must stay aware of boat movements.
Low risk: Cold water upwelling
Open-ocean swells can push cool, low-visibility water into the trench, reducing visibility from 20 m to 5–8 m rapidly.
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Getting in
Boat
Entry
Hugo's Trench lies approximately 2.5 km offshore from Byron Bay, within the Julian Rocks Aquatic Reserve. Several Byron Bay dive and snorkel charter operators run trips to the site daily (e.g. Sundive, Byron Bay Dive Centre). Boats depart from the Byron Bay jetty or Main Beach. Bookings essential; no public boat access ramp directly at the site.
Parking & facilities
Paid parking available at Byron Bay Main Beach carpark ($4/hour, 4 hr limit enforced 9am–6pm) and at the Byron Bay Lighthouse carpark (fee applies). Arrive early in peak season.
toiletsparking
Snorkel charter rates ~$70–$90 per person (gear hire extra). Julian Rocks is a protected marine reserve — no additional park entry fee for the water, but National Parks parking fees apply.
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About this data
- Conditions last evaluated
- Spot data last updated
- Data sources
- Open-Meteo (marine & weather conditions), tide predictions via UTide, community contributors (descriptions, hazards, marine life).
- License
- Spot content licensed under CC BY-SA 4.0. How's the Spot is open source.
Weather & swell ┬╖ Open-Meteo marine & weather APIs Tides ┬╖ UTide harmonic analysis Sea & safety ┬╖ community reports