← Lake Guide40.34° N · 81.17° W

Ohio

Tappan Lake

Roughly 2,136 acres of Ohio water in Harrison County, Tappan Lake is a seasonal largemouth lake to read by cover and weather.

Surface
2,136acres
Primary species
Largemouth
§ 01Today on the water · Tappan Lakevia Open-Meteo · 13:30 local
Air temp
71.4°F
Barometric
30.08″
→steady 24h(-0.02)
Wind
4mph
from SSW
Moon
Full Moon
day 18.4 · 86% lit

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

§ 03Next 3 daysvia Open-Meteo · interpretation
  1. 31
    augMon

    Stable window

    hi 86° · lo 67°

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

    ── light s wind · settled

  2. 1
    sepTue

    Stable window

    hi 88° · lo 69°

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

    ── light sw wind · settled

  3. 2
    sepWed

    Stable window

    hi 94° · lo 70°

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

    ── light sw wind · settled

§ 04Field notesOhio

Where it is

Tappan Lake lies in Harrison County, Ohio, and runs to roughly 2,136 acres. Largemouth work shallow-to-deep and back as conditions change through the year.

Seasonal pattern

Spring. Early warming sends largemouth into the shallows to stage and spawn, the calmest sun-fed water leading the move.

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

Fall. Dropping temperatures pull bait and largemouth back toward shallow water in a wider, roaming feed.

Winter. Largemouth go deep and sluggish in cold water, so a slow, methodical approach is the safer bet.

Key structure

  • Shoreline cover near quick depth changes
  • Shade lines and overhead cover in the warm months
  • Submerged wood, brush, and laydown cover
  • Channel edges and the breaks beside them

Season first, spot second — that order holds here.

Forage

The forage base on Tappan Lake is baitfish and panfish; largemouth stay with those schools as they shift.

Access

Access is public around Tappan Lake; ramp and launch status changes with water levels, so confirm locally first.

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:01046947). 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