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Map of Brownstone Quarry (Brownstone Exploration & Discovery Park)
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IntermediateShore entry

Brownstone Quarry (Brownstone Exploration & Discovery Park)

Connecticut, United States
Open Water suggested0–26 m depthShore entry

Brownstone Quarry (Brownstone Exploration & Discovery Park) at a glance

Brownstone Quarry (Brownstone Exploration & Discovery Park) is a intermediate shore dive site in Connecticut, United States with depths of 0–25.9 m (0–85 ft). Typically most favorable Jun · from 3 years of archive data. Divers commonly see largemouth bass, bluegill, and yellow perch. Check the latest conditions and entry details before you go.

Wind model · graded 4h ago
—

Tap a factor for its source and model point

Site hazards: Thermoclines and cold deep water, swimmers and other park users on the surface, depth drop-offs

Read the full hazards ↓

Dive windows this week

Best: Sun
Sun6:00–21:00
Mon6:00–21:00
Tue6:00–21:00
Wed6:00–20:00
Thu13:00–21:00
Fri6:00–21:00
Sat6:00–21:00

Favorable windowModerate window— no window

First light 5:07 · Sunrise 5:39 · Sunset 20:14

Source: Open-Meteo wind · graded 4h ago

Forecast only — always assess conditions on site.

Forecast · NOAA tide model

Tide & slack timing

Loading tide predictions

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.

What Divers Say

Known for: largemouth bass, bluegill, yellow perch
Best time: Summer season during park hours

Based on community reviews and site data. Conditions vary — always verify before diving.

Best months, historically

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

  1. Jan75% 11 kn
  2. Feb82% 11 kn
  3. Mar72% 12 kn
  4. Apr81% 11 kn
  5. May82% 9 kn
  6. Jun97% 9 kn
  7. Jul95% 8 kn
  8. Aug92% 8 kn
  9. Sep94% 8 kn
  10. Oct92% 9 kn
  11. Nov83% 11 kn
  12. Dec78% 10 kn

June 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, by month

Recorded observations — evidence of past sightings, not a promise of what you’ll encounter.

Species seen here

  • largemouth bassCommonly seen
  • bluegillCommonly seen
  • yellow perchCommonly seen
  • crayfishOccasionally seen
  • brown troutOccasionally seen

  • Micropterus dolomieu recorded here Jun (1 record)

    most recent 2008

Counts are occurrence records near this site from public biodiversity datasets (GBIF), grouped by calendar month across all sampled years. Sightings vary — past records are context, not a prediction.

Fills & rentals nearby

Facts from OpenStreetMap, corrected by the community — listed by distance only. Details change; confirm with the shop.

Shop facts come from OpenStreetMap and community corrections, shown nearest first. PickADive lists facts and contacts only — no listing is sponsored or ranked.

Site details

A flooded 27-acre historic brownstone quarry in Portland operated as an adventure park, with 80-100 foot cliffs surrounding clear fresh water. Scuba diving is permitted in the north quarry for certified divers who buy an adventure pass, with depths to about 85 feet and submerged quarry features and attractions to explore.

shorewall

Thermoclines and cold deep water, swimmers and other park users on the surface, depth drop-offs

Reviews

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