Shark Alley (Dyer Island), Gansbaai is a dive site in Western Cape, South Africa. Typically most favorable Jan · from 3 years of archive data. Divers commonly see Great white shark, Bronze whaler (copper shark), and Common dolphin. Recent reports put the water around 16°C (60°F). Check the latest conditions and entry details before you go.
Tap a factor for its source and model point · Forecast 16°C · seasonal avg 15°C
Dive windows this week
Best: TueFavorable windowModerate window— no window
First light 6:22 · Sunrise 6:47 · Sunset 18:30 · all windows sit within daylight
Source: Open-Meteo marine · model point 4.7 km from site · graded 13h ago
Forecast only — always assess conditions on site.
Dated firsthand observations from divers — not current conditions.
No diver reports for this site yet. — one dated observation helps every diver after you.
Based on community reviews and site data. Conditions vary — always verify before diving.
What conditions have historically been typical at this site, month by month — not a forecast.
January hastypically had the largest share of favorable days here. Conditions vary year to year — this is historical context, not a forecast.
Based on 3 years of archive data. Bar height shows the share of days each month whose conditions have historically scored favorably.
Recorded observations — evidence of past sightings, not a promise of what you’ll encounter.
Carcharodon carcharias recorded here Sep (7 records)
most recent 2010
Counts are occurrence records near this site from public biodiversity datasets (GBIF), grouped by calendar month across all sampled years. Sightings vary — past records are context, not a prediction.
The underwater calendar
When these animals are most recorded around Southern Africa — from open sighting data, not a promise.
No dive shops mapped within 25 km. Know one? Add it to the map.
Data updated July 2026
No description for this site yet — divers who know it can suggest one below.
No hazards recorded for this site yet — that never means there are none. Ask a local operator before you dive.
Divers at Shark Alley (Dyer Island), Gansbaai in South Africa commonly report sightings of Great white shark, Bronze whaler (copper shark), Common dolphin, Southern right whale, and Kelp gull. Bronze whaler (copper shark) and Kelp gull are recorded as common sightings, while Great white shark and Southern right whale are seasonal, while Common dolphin is reported only occasionally. Marine life varies by season and conditions—check the site page for recent diver observations and photos.
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