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Illinois

Crab Orchard Lake

Anglers know Crab Orchard Lake as a 7,293-acre Williamson County lake in Illinois; largemouth patterns turn with the calendar.

Surface
7,293acres
Primary species
Largemouth
§ 01Today on the water · Crab Orchard Lakevia Open-Meteo · 03:15 local
Air temp
78.3°F
Barometric
30.00″
→steady 24h(-0.04)
Wind
4mph
from SW
Moon
Waxing Crescent
day 4.0 · 17% lit

Air conditions sampled near the lake center, not measured on the water · refreshed ~15 min

§ 03Next 3 daysvia Open-Meteo · interpretation
  1. 17
    julFri

    Stable window

    hi 86° · lo 73°

    Anytime through the day. Quiet weather day; lean on seasonal pattern and structure.

    ── light w wind

  2. 18
    julSat

    Stable window

    hi 91° · lo 74°

    Anytime through the day. Quiet weather day; lean on seasonal pattern and structure.

    ── light w wind · settled

  3. 19
    julSun

    Better early

    hi 91° · lo 75°

    Pre-dawn through 9am. Get on the water before the front; the bite likely shrinks once precip starts.

    ── front rolling in · w wind setting up

§ 04Field notesIllinois

Where it is

Crab Orchard Lake sits in Williamson County, Illinois, covering about 7,293 acres. Season and conditions decide the productive water; the map is the starting point.

Seasonal pattern

Spring. Warming water pulls largemouth toward shallow, protected areas where they stage and spawn; the quickest-warming pockets lead.

Summer. Heat pushes fish off the shallows toward depth and shade; work the cooler ends of the day.

Fall. As water cools, forage and bass return toward shallower water; movement is wide, so covering water pays.

Winter. Cold water settles fish deep and slow; patience and a subtle presentation are the more dependable choice.

Key structure

  • Creek and cove mouths that funnel fish and bait
  • Weed edges and the clean lines along them
  • Inside turns where a bank changes angle
  • Submerged wood, brush, and laydown cover

The calendar decides which of these is worth time on a given day.

Forage

Forage on Crab Orchard Lake pulls largemouth between cover and the open water that schools of bait drift through.

Access

Crab Orchard Lake has public access points; conditions and water levels change, so verify locally before launching.

Regulations

Check current state and local regulations before fishing; limits and seasons can change.

§ 05Sources & field guides

Field guides

Data & references

  • Today's conditions — Open-Meteo, refreshed every ~15 min
  • Moon phase — local astronomical calculation, no external API
  • Lake area, depth, structure — Identity, surface area, coordinates and county/state are from the ProjectD canonical waterbody index (snapshot conus-20260518-v1, group gnis:00406704). Maximum depth and regulation links were not available from an acceptable source and are intentionally omitted.
  • Regulations — verify current state and local regulations before fishing

Last revised · Back to Lake Guide