Lake
down to 14 m
Rummu Underwater Prison
Shallow freshwater quarry dive past flooded prison buildings and a submerged 'Zombie Forest' of drowned trees.
- Open Water
Rummu Quarry
Diving in Estonia
A dive in Estonia that is worth the trip on its own. Best months: Jun–Aug.
- Best months
- Jun–Aug
- Water
- 20–27 °C
- Levels
- Open Water
- Nearest airport
- TLL
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
Rummu Quarry in October
Possible- Air
- 11 °C
- 5 °C at night
- Rain
- 70 mm
- average for the year
- Wind
- 16 km/h
- on average
The windiest month.
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.
No source describes a formal dive season. Visit Estonia lists the guided intro-dive programme as running 25 May – 28 September; a gift-voucher seller says 'summer season'; Divernet reports 20 °C at the surface in June and up to 27 °C in late summer. Jun–Aug is shown as best, Sep as good, other months as possible (Visit Estonia lists the quarry itself as open all year; no source says diving stops). Ice/winter diving is not sourced.
The dive
Open Water friendly
usual dive down to 18 m1 siteMarine life
When the big encounters happen, month by month.
Reported here, season not documented yet:
- Freshwater fish
Where is Rummu Quarry?
- Nearest airport
- TLL
Rummu Quarry: frequently asked questions
- When is the best time to dive Rummu Quarry?
- The best months to dive Rummu Quarry are Jun–Aug. No source describes a formal dive season. Visit Estonia lists the guided intro-dive programme as running 25 May – 28 September; a gift-voucher seller says 'summer season'; Divernet reports 20 °C at the surface in June and up to 27 °C in late summer. Jun–Aug is shown as best, Sep as good, other months as possible (Visit Estonia lists the quarry itself as open all year; no source says diving stops). Ice/winter diving is not sourced.
- Is Rummu Quarry good for beginner divers?
- Yes, partly: 1 of the 1 dive sites we document are suited to Open Water divers, including Rummu Underwater Prison. The others need more experience or a higher certification.
- What is the water temperature in Rummu Quarry?
- The water is usually between 20 °C and 27 °C over the year.
- What marine life can you see in Rummu Quarry?
- Divers regularly see freshwater fish.
- How do you dive Rummu Quarry?
- The nearest airport is TLL.
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
- Sunlight and bubbles in deep blue water, Sarah Lee, Unsplash License, on Unsplash