Hidden gem
Bonne Terre Mine
Guided trail dives in a flooded mine lit by over 500,000 watts, in constant 58°F water with about 100-foot visibility.
- Advanced
- Flooded mine
Bonne Terre Mine
Diving in United States
A dive in United States that is worth the trip on its own. Diveable all year.
- Good months
- All year
- Water
- 14–14 °C
- Levels
- Advanced
When to go
Pick a month: the diving season, from published sources, and the typical weather.
Pick a month
- Best
- Good
- Possible
- Closed
- Not documented yet
Bonne Terre Mine in October
Good season- Air
- 21 °C
- 11 °C at night
- Rain
- 70 mm
- average for the year
- Wind
- 12 km/h
- on average
Typical weather, not a forecast: averages for 2021–2025 (air, rain, wind), data from Open-Meteo (ERA5 / Copernicus, Météo-France). Covers an area of roughly 10 to 25 km around the destination.
Underground lake with constant conditions, dived year-round on weekends (Scuba Diving 2021; Islands 2024: Saturdays and Sundays, some Friday nights). No best season. However, the official site currently shows a closure notice.
The dive
For Advanced divers
usual dive down to 30 m1 siteWhere is Bonne Terre Mine?
Bonne Terre Mine: frequently asked questions
- When is the best time to dive Bonne Terre Mine?
- Bonne Terre Mine can be dived all year round. Underground lake with constant conditions, dived year-round on weekends (Scuba Diving 2021; Islands 2024: Saturdays and Sundays, some Friday nights). No best season. However, the official site currently shows a closure notice.
- Is Bonne Terre Mine good for beginner divers?
- Not really: none of the 1 dive sites we document is rated for Open Water divers. Plan an Advanced certification and some experience first.
- What is the water temperature in Bonne Terre Mine?
- The water is usually between 14 °C and 14 °C over the year.
About this page
Seasons and marine life come from the sources below. Site levels and depths marked as estimated come from our original catalogue and are being checked one by one. Conditions change: always confirm with a local dive centre.
Your next dive is somewhere out there.
Find my next dive tripPhoto credits
- Bonne Terre Mine dive site, Missouri, Serge Melki from Indianapolis, USA, CC BY 2.0, via Wikimedia Commons
- Sunlight and bubbles in deep blue water, Sarah Lee, Unsplash License, on Unsplash
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