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Map of Great Basses Reef (Coin Wreck)
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Great Basses Reef (Coin Wreck)

Kirinda, Sri Lanka
20 m depthBoat entryRash guard or 2mm shorty typical

Boat dive — see Entry & access.

Great Basses Reef (Coin Wreck) at a glance

Great Basses Reef (Coin Wreck) is an advanced boat dive site in Kirinda, Sri Lanka with depths of up to 20 m (66 ft). Typically most favorable Mar · from 3 years of archive data. Recent reports put the water around 29°C (84°F). Check the latest conditions and entry details before you go.

Marine model · graded 2h ago
1.8 mwaves — about two meters expected

Tap a factor for its source and model point · Forecast 29°C · seasonal avg 28°C

Site hazards: Strong current and surge sweep divers toward the reef top, and the hazard increases as depth decreases toward the shallows. The site is only accessible from mid-March through the end of April, the window between the North-East and South-West monsoons; conditions turn hazardous outside that window. Only experienced divers comfortable with current and surge should attempt this site. The open-water boat transit (roughly 1-1.25 hrs each way) exposes divers to swell before the dive even begins.

Read the full hazards ↓

Dive windows this week

Best: Tue
Sat6:00–10:00
Sun6:00–11:00
Mon6:00–18:00
Tue6:00–18:00
Wed6:00–18:00
Thu6:00–12:00
Fri—

Favorable windowModerate window— no window

First light 5:34 · Sunrise 5:55 · Sunset 18:05 · all windows sit within daylight

Source: Open-Meteo marine · model point 4.0 km from site · graded 2h ago

Forecast only — always assess conditions on site.

Recent diver reports

Dated firsthand observations from divers — not current conditions.

No diver reports for this site yet. — one dated observation helps every diver after you.

Dived here today — did the forecast match?

Best months, historically

What conditions have historically been typical at this site, month by month — not a forecast.

  1. Jan28%28°C1.6 m
  2. Feb38%28°C1.5 m
  3. Mar76%29°C1.3 m
  4. Apr61%30°C1.5 m
  5. May17%29°C2.0 m
  6. Jun0%28°C2.2 m
  7. Jul0%27°C2.2 m
  8. Aug0%28°C2.2 m
  9. Sep1%28°C2.1 m
  10. Oct20%29°C1.8 m
  11. Nov64%29°C1.6 m
  12. Dec45%28°C1.5 m

March 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.

Marine life recorded at this site

No recorded sightings data for this site yet. Species lists appear as GBIF records and diver reports accumulate.

Fills & rentals nearby

No dive shops mapped within 25 km. Know one? Add it to the map.

Data updated June 2026

Site details

No description for this site yet — divers who know it can suggest one below.

boatdriftreefwreck

Strong current and surge sweep divers toward the reef top, and the hazard increases as depth decreases toward the shallows. The site is only accessible from mid-March through the end of April, the window between the North-East and South-West monsoons; conditions turn hazardous outside that window. Only experienced divers comfortable with current and surge should attempt this site. The open-water boat transit (roughly 1-1.25 hrs each way) exposes divers to swell before the dive even begins.

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