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Shore entry

Portage Quarry

Ohio, United StatesDirections
Open Water suggested3–21 m (10–70 ft) depthShore entry

Portage Quarry at a glance

Portage Quarry is a shore dive site in Ohio, United States with depths of 3–21.3 m (10–70 ft). Typically most favorable Sep · from 3 years of archive data. Divers commonly see Koi, Rainbow trout, and Largemouth bass. Check the latest conditions and entry details before you go.

Favorable window now· until 19:00 · sunset 18:39

Wind forecast for this hour · 10:00 · run 8 h ago
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Tap a factor for its source and model point

Site hazards: No current dive support on site; trespassing if entered while closed; thermocline and silt when it operated

Read the full hazards ↓

Dive windows this week

Sun8:00–19:00 favorable

5 kn wind (5 kn wind)

Mon8:00–19:00 favorable

6 kn wind (6 kn wind)

Tue9:00–19:00 favorable

7 kn wind (7 kn wind)

Wed9:00–19:00 favorable

7 kn wind (7 kn wind)

Thu9:00–13:00 moderate, 13:00–19:00 favorable

11 kn wind (11 kn wind)

Fri9:00–19:00 favorable

6 kn wind (6 kn wind)

Sat9:00–19:00 favorable

5 kn wind (5 kn wind)

Favorable windowModerate window— no window

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

First light 7:29 · Sunrise 7:58 · Sunset 18:39 · some windows run past sunset

Source: Open-Meteo wind · updated 25 Oct, 01:25 GMT-4

Forecast only — always assess conditions on site.

Compare this weekend’s windows near Portage Quarry

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.

Dived here today — did the forecast match?

What Divers Say

Known for: Largemouth bass, Smallmouth bass, Bluegill

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. January, 77% of days have historically been favorable, wind has typically been 12 knots
  2. February, 61% of days have historically been favorable, wind has typically been 13 knots
  3. March, 59% of days have historically been favorable, wind has typically been 14 knots
  4. April, 58% of days have historically been favorable, wind has typically been 13 knots
  5. May, 77% of days have historically been favorable, wind has typically been 11 knots
  6. June, 80% of days have historically been favorable, wind has typically been 11 knots
  7. July, 87% of days have historically been favorable, wind has typically been 9 knots
  8. August, 89% of days have historically been favorable, wind has typically been 10 knots
  9. September, 94% of days have historically been favorable, wind has typically been 9 knots, historically most favorable
  10. October, 77% of days have historically been favorable, wind has typically been 11 knots
  11. November, 71% of days have historically been favorable, wind has typically been 12 knots
  12. December, 72% of days have historically been favorable, wind has typically been 12 knots

September 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 seen at this site

Species noted at this site — not a promise of what you’ll encounter.

Species seen here

Rough labels: “Commonly seen” usually means two or more recorded sightings near this site in public dive logs (GBIF), “Occasionally seen” one; “Seasonal” and “Rarely seen” come from dive-guide research. Not a measured rate.

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

Portage Quarry Recreation Club, just south of Bowling Green, was for decades one of Ohio's most popular dive quarries: a 23-acre spring-flooded limestone pit with average depths of 50-60 feet and a maximum around 70 feet. Attractions sunk for divers included a 68-foot Hansa jet, a bladeless helicopter, a school bus, a grain silo and a swim-through semi-trailer. The property changed hands and the recreation club is now listed as closed; divers should confirm status before planning a visit.

shorewreck

No current dive support on site; trespassing if entered while closed; thermocline and silt when it operated

Reviews

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