Big Scare / El Gran Susto (Bat Islands) is a shore dive site in Guanacaste, Costa Rica. Typically most favorable Oct · from 3 years of archive data. Recent reports put the water around 30°C (86°F). Check the latest conditions and entry details before you go.
Tap a factor for its source and model point · Forecast 30°C · seasonal avg 29°C
Dive windows this week
Best: MonFavorable windowModerate window— no window
First light 5:08 · Sunrise 5:31 · Sunset 18:09
Source: Open-Meteo marine · model point 1.3 km from site · graded 4h 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.
What conditions have historically been typical at this site, month by month — not a forecast.
October 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.
No recorded sightings data for this site yet. Species lists appear as GBIF records and diver reports accumulate.
No dive shops mapped within 25 km. Know one? Add it to the map.
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.
No reviews yet — this site is waiting for its first. Dived here? Your rating and a few lines help the next diver.
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