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16-acre reservoir near Kalāheo. The lake tops out around 22 ft. The contours come from a model of the real basin shape and its known max depth. Read them as probabilities, not soundings, and keep them out of navigation decisions. The rest of this page walks each species through its year, using the map's own scoring.
On the chart, Ipuolono Reservoir draws 15 acres inside 0.7 miles of shoreline. Nearly circular (index 1.4), so the story is the bottom, not the bank. Littoral water — the productive band under ~15 ft — makes up 50% of this chart, as modeled. Tip to tip the water measures near 0.3 mi with a 0.2-mi widest point. The water lies in Kauai County. For a second option, Aepo Reservoir lies 3 mi east.
Spring puts largemouth bass in skinny water — 2 to 10 ft is the zone. As the season builds they drop to 8 to 20 ft, wintering in 7 to 22 ft. Fall largemouth bass concentrate at Main-lake point, a prime-rated point around 8 ft. Warm-month bites cluster around early morning and the evening. A texas-rigged 10" worm or a deep-diving crankbait covers the summer program.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 10 ft | dawn & dusk | Main-lake point (8 ft) | Spinnerbait, Chatterbait |
| Summer | 8 to 20 ft | dawn & dusk | Break off the point (10 ft) | Texas-rigged 10" worm, Deep-diving crankbait |
| Fall | 4 to 15 ft | midday & dawn | Main-lake point (8 ft) | Squarebill crankbait (shad), Spinnerbait |
| Winter | 7 to 22 ft | midday | Break off the point (10 ft) | Blade bait, Jigging spoon |
Start shallow in spring: bluegill sit in 1 to 6 ft that time of year. Summer pushes them deeper, 4 to 15 ft, and winter fish settle into 7 to 22 ft. The spot to know is Deep basin, a deep basin in about 19 ft of water that rates prime for bluegill in winter. Warm-month bites cluster around early morning and the evening. Throw a small sponge spider (fly) or a micro tube jig until the fish tell you otherwise.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 1 to 6 ft | midday & dusk | open water | 1/32 oz jig + micro plastic, Tiny popper (evenings) |
| Summer | 4 to 15 ft | dawn & dusk | open water | Small sponge spider (fly), Micro tube jig |
| Fall | 6 to 18 ft | midday | Break off the point (10 ft) | Micro jig + waxworm, Small spoon tipped |
| Winter | 7 to 22 ft | midday | Deep basin (19 ft) | Tiny spoon |
In spring, tilapia run shallow here, mostly 1 to 6 ft. Summer pushes them deeper, 2 to 10 ft, and winter fish settle into 5 to 18 ft. Deep basin is the standout, a deep basin at roughly 19 ft, rated prime for winter tilapia. Time it for midday and early morning. You won't need more than a micro-jig near weed edges most summer days.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 1 to 6 ft | midday & dusk | Main-lake point (8 ft) | Tiny jig + bread-ball tip, Small worm under float |
| Summer | 2 to 10 ft | midday & dawn | open water | Micro-jig near weed edges |
| Fall | 3 to 12 ft | midday | Break off the point (10 ft) | Small jig tipped with worm |
| Winter | 5 to 18 ft | midday | Deep basin (19 ft) | Slow micro-jig, warm outflows |
The chart marks 3 structure features on Ipuolono Reservoir; the deepest is Deep basin at about 19 ft.
Season dates, license requirements, and size and bag limits for Hawaii waters are set by the Hawaii DLNR — and special regulations can apply to Ipuolono Reservoir specifically, so confirm the current rules before you fish.
Check the official Hawaii fishing regulations →
Ipuolono Reservoir is about 22 ft (7 m) deep at its deepest point. The contours here are modeled from the water's real shape and maximum depth, so treat them as a rough guide.
Anglers target largemouth bass, bluegill, tilapia on Ipuolono Reservoir.
Main-lake point is the top-rated area: a point in about 8 ft of water that rates prime for largemouth bass in fall. Every other rated spot, per species and season, is on the map above.
For largemouth bass, the summer bite is best in early morning and the evening. Each species page section below lists the seasonal windows, and the map shows a live NOW badge when you're inside one.
Fishing on Ipuolono Reservoir is regulated by the Hawaii DLNR. Check the official Hawaii regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Aepo Reservoir 3 mi · Alexander Reservoir 3 mi · Aepoeha Reservoir 3 mi · Mauka Reservoir 4 mi · Waita Reservoir 5 mi · Halenanahu Reservoir 7 mi · Kapaia Reservoir 11 mi · Wailua Reservoir 13 mi · Puʻu Lua Reservoir (Kōkeʻe) 15 mi · Kalihiwai Reservoir 19 mi · Puu Ka Ele Reservoir 20 mi · Waiakalua Reservoir 22 mi
See how Ipuolono Reservoir stacks up: best largemouth bass lakes in Hawaii · best tilapia lakes in Hawaii · best bluegill lakes in Hawaii
More water nearby: Kauai County fishing maps (13 charts). Browse all Hawaii fishing maps or see every water on DepthScout. How we build these maps. Fish here with a sonar unit that logs? Send us your depth data and we'll improve this chart, credited to you. For fishing guidance only, never navigation.