CYNTHIA
Protected Area
Marcus Island Marine Protected Area
Why dive here
With 269+ marine species recorded in the area - including blue sharks, blue whales, dolphins, dwarf minke whales and great white sharks - CYNTHIA offers some of Cape Town & Western Cape's richest wreck diving. Water ranges 14-16°C, warmest February, March, April.
The Cynthia, just outside Granger Bay, offers a chill wreck dive that’s perfect when you want something close to shore. At a shallow 8 metres, it’s a site we often swing by for an easy second dive or when the south-easter is blowing. She was a tug that sank at anchor, and you can still make out the superstructure – the bridge area is especially cool to poke around. What we really love about the Cynthia is how much life has moved in. The deck is carpeted in soft corals, and there are always plenty of shy hottentot and strepies darting between the plates. Look closely in the nooks and crannies for nudibranchs, especially during the spring. It’s a great spot for newer wreck divers to get a feel for penetration, with plenty of light filtering down into the holds. The visibility here can vary a lot, from 5 metres on an average day to 15 metres if you’re lucky, so pick your day. Go on a calm morning, ideally after a few days of no wind, and you’ll find it at its best.
Typical CYNTHIA Dive Profile
Illustrative profile based on site depth and type. Actual dive profiles vary - always follow your dive computer and training.
Safety Notes
Wreck site - avoid penetration without wreck diving certification. Watch for sharp metal and entanglement hazards.
Cold water this month (avg 15°C). Drysuit or thick wetsuit (7mm+) recommended.
Nearest Dive Centres to CYNTHIA
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Conditions
Ocean conditions, forecast and tides for CYNTHIA
CYNTHIA Ocean Conditions
Monthly averages for CYNTHIA, sourced from Open-Meteo marine data - nearest station: Open-Meteo marine grid (-33.92, 18.46) (8km away)
October Averages
Sea Temperature
15°C
59°F · Range: 12.4–17.2°C
Air Temperature
17°C
62°F
Wind Speed
7.33 m/s
14.2 knots
Atmospheric Pressure
1018.1 hPa
Based on 4 years of monitoring data · Data sources: Open-Meteo marine data
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