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New Jersey

Round Valley Reservoir

Round Valley Reservoir is a reservoir in Hunterdon County, New Jersey, with 2,272 acres of largemouth water organized around cover, points, and feeder creeks.

Surface
2,272acres
Primary species
Largemouth
§ 01Today on the water · Round Valley Reservoirvia Open-Meteo · 00:00 local
Air temp
72.4°F
Barometric
30.05″
→steady 24h(-0.02)
Wind
2mph
from SW
Moon
Waning Gibbous
day 19.4 · 77% 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 78° · lo 66°

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

    ── light sw wind

  2. 1
    sepTue

    Tougher window

    hi 88° · lo 68°

    Pick the calmest hour and stay flexible. Conditions push hard today; bite likely shrinks. Plan around the calmest gap.

    ── heavy precipitation · bite likely shrinks

  3. 2
    sepWed

    Better early

    hi 75° · lo 67°

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

    ── front rolling in · e wind setting up

§ 04Field notesNew Jersey

Where it is

Found in Hunterdon County, New Jersey, Round Valley Reservoir totals about 2,272 acres. Largemouth read the season, sliding shallow or deep as it dictates.

Seasonal pattern

Spring. Largemouth push shallow as water warms, holding on cover to stage and spawn where the warm-up starts soonest.

Summer. Once the surface heats, fish slide toward deeper edges, shade, and main-body structure, and low light fishes best.

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

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

Key structure

  • Wind-pushed banks that gather forage
  • Points where shallow water drops toward deeper water
  • Submerged wood, brush, and laydown cover
  • Inside turns where a bank changes angle

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

Forage

Forage drives Round Valley Reservoir — largemouth track the baitfish between shallow cover and deeper water.

Access

Around Round Valley Reservoir in Hunterdon County, public access exists; confirm ramp and launch status locally as levels change through the year.

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:00879839). 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