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Map of Schildberg (Atlantic) Quarry
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IntermediateShore entry

Schildberg (Atlantic) Quarry

Iowa, United StatesDirections
Open Water suggested3–31 m (10–100 ft) depthShore entry

Schildberg (Atlantic) Quarry at a glance

Schildberg (Atlantic) Quarry is an intermediate shore dive site in Iowa, United States with depths of 3–30.5 m (10–100 ft). Typically most favorable Jul · from 3 years of archive data. Divers commonly see Crappie, Bluegill, and Largemouth bass. Check the latest conditions and entry details before you go.

No window today· next: tomorrow 9:00–19:00 · favorable & moderate

Wind forecast for this hour · 21:00 · run 9 h ago
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Tap a factor for its source and model point

Site hazards: Cold hypoxic water below ~60 ft, quarry walls and debris, post-storm visibility collapse, uncertain/locked gate access

Read the full hazards ↓

Dive windows this week

SunNo window

3 kn wind (3 kn wind)

Mon9:00–10:00 moderate, 10:00–19:00 favorable

10 kn wind (10 kn wind)

Tue8:00–16:00 moderate, 16:00–19:00 favorable

9 kn wind (9 kn wind)

Wed8:00–9:00 favorable, 9:00–14:00 moderate, 14:00–15:00 favorable, 15:00–18:00 moderate

10 kn wind (10 kn wind)

Thu8:00–19:00 favorable

8 kn wind (8 kn wind)

Fri8:00–19:00 favorable

11 kn wind (11 kn wind)

Sat8:00–11:00 favorable, 11:00–13:00 moderate, 13:00–19:00 favorable

6 kn wind (6 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 7:15 · Sunrise 7:43 · Sunset 18:24 · some windows run past sunset

Source: Open-Meteo wind · updated 25 Oct, 12:25 GMT-5

Forecast only — always assess conditions on site.

Compare this weekend’s windows near Schildberg (Atlantic) Quarry

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: Bluegill, Largemouth bass
Best time: Settled weather in summer and early fall

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, 74% of days have historically been favorable, wind has typically been 12 knots
  2. February, 67% 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, 34% of days have historically been favorable, wind has typically been 16 knots
  5. May, 73% of days have historically been favorable, wind has typically been 12 knots
  6. June, 69% of days have historically been favorable, wind has typically been 12 knots
  7. July, 89% of days have historically been favorable, wind has typically been 10 knots, historically most favorable
  8. August, 87% of days have historically been favorable, wind has typically been 10 knots
  9. September, 88% of days have historically been favorable, wind has typically been 10 knots
  10. October, 60% of days have historically been favorable, wind has typically been 13 knots
  11. November, 69% of days have historically been favorable, wind has typically been 12 knots
  12. December, 78% of days have historically been favorable, wind has typically been 12 knots

July 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 June 2026

Site details

A flooded limestone pit quarry owned by Schildberg Construction on the north edge of Atlantic, long used by Omaha- and Des Moines-area dive shops, clubs and public-safety teams for training. Average visibility runs 10-15 ft and drops sharply after storms; above roughly 60 ft the water is clear, while deeper water is about 41F, low-oxygen and sulfurous. Access has been intermittent - diving historically required written permission and liability waivers from Schildberg, and trespassing signage has been reported at the gate in some years, so confirm access before traveling.

shorewall

Cold hypoxic water below ~60 ft, quarry walls and debris, post-storm visibility collapse, uncertain/locked gate access

Reviews

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