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Pennsylvania

Lake Arthur

Set among Butler County waters in Pennsylvania, Lake Arthur is a 3,075-acre lake for seasonal largemouth fishing.

Surface
3,075acres
Primary species
Largemouth
§ 01Today on the water · Lake Arthurvia Open-Meteo · 12:00 local
Air temp
66.4°F
Barometric
29.96″
→steady 24h(-0.05)
Wind
1mph
from SE
Moon
Last Quarter
day 22.4 · 47% lit

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

§ 03Next 3 daysvia Open-Meteo · interpretation
  1. 4
    sepFri

    Stable window

    hi 79° · lo 65°

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

    ── light w wind

  2. 5
    sepSat

    Stable window

    hi 77° · lo 64°

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

    ── light n wind

  3. 6
    sepSun

    Stable window

    hi 75° · lo 54°

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

    ── light ne wind · settled

§ 04Field notesPennsylvania

Where it is

Lake Arthur sits in Butler County, Pennsylvania, covering about 3,075 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 Lake Arthur centers on baitfish and panfish; largemouth follow those schools across cover and depth changes.

Access

Access to Lake Arthur is generally public; check water levels and conditions 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:01168431). 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