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Map of Shark Fin Rock
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Boat entry

Shark Fin Rock

Cocos Island, Costa Rica
Boat entryRash guard or 2mm shorty typical

Boat dive — see Entry & access.

Shark Fin Rock at a glance

Shark Fin Rock is a boat dive site in Cocos Island, Costa Rica. Typically most favorable Mar · from 3 years of archive data. Recent reports put the water around 30°C (85°F). Check the latest conditions and entry details before you go.

Next window today· 6:00–18:00 · favorable · sunset 17:30

Forecast for this hour · 0:00 · run 13 h ago
1.6 m (5.3 ft)waves — about a meter and a half expected (waves — about five feet expected)

Tap a factor for its source and model point · Forecast 30°C · seasonal avg 28°C ( · Forecast 85°F · seasonal avg 82°F)

Dive windows this week

Mon6:00–18:00 favorable

1.5 m waves · 10 kn wind (4.9 ft waves · 10 kn wind)

Tue6:00–18:00 favorable

1.4 m waves · 7 kn wind (4.4 ft waves · 7 kn wind)

Wed6:00–18:00 favorable

1.3 m waves · 5 kn wind (4.1 ft waves · 5 kn wind)

Thu6:00–18:00 favorable

1.2 m waves · 6 kn wind (3.9 ft waves · 6 kn wind)

Fri6:00–18:00 favorable

1.2 m waves · 8 kn wind (3.8 ft waves · 8 kn wind)

Sat6:00–18:00 favorable

1.4 m waves · 4 kn wind (4.5 ft waves · 4 kn wind)

SunNot in the forecast yet

Favorable windowModerate window— no window

Every forecast dive window each day, site-local time, from wave and wind forecasts. Numbers under each bar are daylight averages.

First light 5:12 · Sunrise 5:33 · Sunset 17:30 · some windows run past sunset

Source: Open-Meteo marine · model point 1.9 km from site · updated 25 Oct, 11:19 GMT-6

Forecast only — always assess conditions on site.

Compare this weekend’s windows near Shark Fin Rock

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. January, 75% of days have historically been favorable, water has typically been 28°C (83°F), waves have typically been 1.5 m (4.8 ft), wind has typically been 9 knots
  2. February, 87% of days have historically been favorable, water has typically been 30°C (85°F), waves have typically been 1.4 m (4.6 ft), wind has typically been 9 knots
  3. March, 87% of days have historically been favorable, water has typically been 30°C (86°F), waves have typically been 1.4 m (4.5 ft), wind has typically been 8 knots, historically most favorable
  4. April, 73% of days have historically been favorable, water has typically been 30°C (86°F), waves have typically been 1.5 m (4.9 ft), wind has typically been 10 knots
  5. May, 30% of days have historically been favorable, water has typically been 29°C (85°F), waves have typically been 1.8 m (5.9 ft), wind has typically been 12 knots
  6. June, 24% of days have historically been favorable, water has typically been 29°C (83°F), waves have typically been 1.8 m (5.9 ft), wind has typically been 13 knots
  7. July, 44% of days have historically been favorable, water has typically been 29°C (83°F), waves have typically been 1.7 m (5.5 ft), wind has typically been 12 knots
  8. August, 39% of days have historically been favorable, water has typically been 28°C (83°F), waves have typically been 1.7 m (5.7 ft), wind has typically been 13 knots
  9. September, 24% of days have historically been favorable, water has typically been 28°C (82°F), waves have typically been 1.8 m (5.9 ft), wind has typically been 13 knots
  10. October, 20% of days have historically been favorable, water has typically been 28°C (82°F), waves have typically been 1.8 m (6.0 ft), wind has typically been 14 knots
  11. November, 32% of days have historically been favorable, water has typically been 27°C (81°F), waves have typically been 1.8 m (5.8 ft), wind has typically been 14 knots
  12. December, 73% of days have historically been favorable, water has typically been 28°C (82°F), waves have typically been 1.5 m (5.0 ft), wind has typically been 11 knots

March has typically 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 (16 mi). Know one? Add it to the map.

Data updated July 2026

Site details

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

boatpinnacle

No hazards recorded for this site yet — that never means there are none. Ask a local operator before you dive.

Reviews

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