THERMOPYLAE SIERRA
Protected Area
Muthurajawela
Why dive here
With 91+ marine species recorded in the area - including blue whales, giant moray eels, humpback whales, orcas and sea turtles - THERMOPYLAE SIERRA offers some of Hikkaduwa & South Coast's richest wreck diving. Water ranges 28-31°C, warmest March, April, May.
The Thermopylae Sierra sits upright on the seabed at 22 metres, a fairly recent wreck, scuttled in 2012. This bulk carrier is enormous, 155 metres long, offering plenty to explore. We found the sheer scale impressive, especially when you swim along the deck towards the bridge, where schools of batfish often hang out. It’s a good wreck for those who enjoy penetrating larger structures, with wide-open cargo holds to fin through. Keep an eye out for resident groupers and lionfish tucked into crevices. This site suits divers comfortable with depth and navigating a big wreck.
Typical THERMOPYLAE SIERRA Dive Profile
Illustrative profile based on site depth and type. Actual dive profiles vary - always follow your dive computer and training.
Safety Notes
Depth of 22m - Advanced Open Water certification recommended.
Wreck site - avoid penetration without wreck diving certification. Watch for sharp metal and entanglement hazards.
Always perform a 3-minute safety stop at 5m before surfacing.
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Conditions
Ocean conditions, forecast and tides for THERMOPYLAE SIERRA
THERMOPYLAE SIERRA Ocean Conditions
Monthly averages for THERMOPYLAE SIERRA, sourced from Open-Meteo marine data - nearest station: Open-Meteo marine grid (6.45, 79.98) (12km away)
October Averages
Sea Temperature
29°C
84°F · Range: 27.7–30°C
Air Temperature
26°C
79°F
Wind Speed
5.07 m/s
9.9 knots
Atmospheric Pressure
1010.1 hPa
Based on 4 years of monitoring data · Data sources: Open-Meteo marine data
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