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205-acre reservoir near Wahiawā. The lake tops out around 88 ft. Bathymetry on this water is estimated from its real outline and maximum depth. Use it to shortlist water, then verify with your electronics — and never navigate by it. What follows comes from the same scoring engine that paints the spots above.
The drawn water covers 205 acres wrapped in 13.1 miles of bank. An index of 6.6 puts the bank firmly in maze territory: point after pocket after cove, every one a casting target. Littoral water — the productive band under ~15 ft — makes up 80% of this chart, as modeled. End to end it runs roughly 2.2 mi, about 1.3 mi across. Honolulu County claims this one. Its nearest charted neighbour, Upper Helemano Reservoir, is 2 mi to the north.
Spring largemouth bass on Lake Wilson (Wahiawā Reservoir) hold shallow, usually 2 to 10 ft. By summer they slide out to 8 to 20 ft, and by winter most fish are in 15 to 35 ft. The chart's best answer is Shallow bay flat — weed flat, 6 ft, prime for spring. Prime time lands in early morning and the evening. The summer box starts with a texas-rigged 10" worm or a deep-diving crankbait.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 10 ft | dawn & dusk | Shallow bay flat (6 ft) | Spinnerbait, Chatterbait |
| Summer | 8 to 20 ft | dawn & dusk | Shallow bay flat (6 ft) | Texas-rigged 10" worm, Deep-diving crankbait |
| Fall | 4 to 15 ft | midday & dawn | Shallow bay flat (6 ft) | Squarebill crankbait (shad), Spinnerbait |
| Winter | 15 to 35 ft | midday | Break off the point (40 ft) | Blade bait, Jigging spoon |
Early season smallmouth bass use the shallows, holding in 3 to 12 ft. Expect a summer slide to 10 to 30 ft, then a winter hold in 20 to 45 ft. Put Main-lake point first on the milk run — a point near 22 ft that grades prime for fall. In summer the feeding windows fall in early morning and the evening. Tie on a drop shot (goby/minnow) or a ned rig and you're in the game.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | dawn & dusk | South Fork Kaukonahua Stream inflow (8 ft) | Ned rig, Tube jig |
| Summer | 10 to 30 ft | dawn & dusk | Main-lake point (22 ft) | Drop shot (goby/minnow), Ned rig |
| Fall | 8 to 25 ft | midday & dawn | Main-lake point (22 ft) | Jerkbait, Blade bait |
| Winter | 20 to 45 ft | midday | Break off the point (40 ft) | Blade bait, Hair jig |
When the water first warms, peacock bass (tucunaré) slide up into 2 to 12 ft. By summer they slide out to 3 to 15 ft, and by winter most fish are in 6 to 22 ft. If you only fish one area, make it Main-lake point: a point around 22 ft that scores prime in winter. In summer the feeding windows fall in midday and early morning. Keep a topwater (walking bait) or a jerkbait rigged through the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 12 ft | midday & dawn | Shallow bay flat (6 ft) | Topwater prop bait, Jerkbait (fire tiger) |
| Summer | 3 to 15 ft | midday & dawn | Shallow bay flat (6 ft) | Topwater (walking bait), Jerkbait |
| Fall | 3 to 15 ft | midday & dawn | Shallow bay flat (6 ft) | Jerkbait, Swimbait |
| Winter | 6 to 22 ft | midday | Main-lake point (22 ft) | Slow jerkbait, Jig |
Spring channel catfish on Lake Wilson (Wahiawā Reservoir) hold shallow, usually 3 to 12 ft. By summer they slide out to 8 to 25 ft, and by winter most fish are in 20 to 40 ft. The chart's best answer is South Fork Kaukonahua Stream inflow — inflow / creek mouth, 8 ft, prime for spring. Prime time lands in after dark and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | dusk | South Fork Kaukonahua Stream inflow (8 ft) | |
| Summer | 8 to 25 ft | night & dusk | South Fork Kaukonahua Stream inflow (8 ft) | |
| Fall | 10 to 30 ft | dusk | Old creek channel (44 ft) | |
| Winter | 20 to 40 ft | midday | Old creek channel (44 ft) |
Early season bluegill use the shallows, holding in 1 to 6 ft. Summer is a 4 to 15 ft game here, winter a 10 to 25 ft one. The chart's best answer is Shallow bay flat — weed flat, 6 ft, prime for spring. Best bite is early morning and the evening. Tie on a small sponge spider (fly) or a micro tube jig and you're in the game.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 1 to 6 ft | midday & dusk | Shallow bay flat (6 ft) | 1/32 oz jig + micro plastic, Tiny popper (evenings) |
| Summer | 4 to 15 ft | dawn & dusk | Shallow bay flat (6 ft) | Small sponge spider (fly), Micro tube jig |
| Fall | 6 to 18 ft | midday | Shallow bay flat (6 ft) | Micro jig + waxworm, Small spoon tipped |
| Winter | 10 to 25 ft | midday | Deep basin (75 ft) | Tiny spoon |
Early season tilapia use the shallows, holding in 1 to 6 ft. Expect a summer slide to 2 to 10 ft, then a winter hold in 5 to 18 ft. Put Shallow bay flat first on the milk run — a weed flat near 6 ft that grades prime for spring. In summer the feeding windows fall in midday and early morning. Tie on a micro-jig near weed edges and you're in the game.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 1 to 6 ft | midday & dusk | Shallow bay flat (6 ft) | Tiny jig + bread-ball tip, Small worm under float |
| Summer | 2 to 10 ft | midday & dawn | Shallow bay flat (6 ft) | Micro-jig near weed edges |
| Fall | 3 to 12 ft | midday | Shallow bay flat (6 ft) | Small jig tipped with worm |
| Winter | 5 to 18 ft | midday | Shallow bay flat (6 ft) | Slow micro-jig, warm outflows |
Lake Wilson (Wahiawā Reservoir) also holds common carp (3 to 15 ft in summer). Pick any of them on the map above for rated spots and bait picks.
The chart marks 8 structure features on Lake Wilson (Wahiawā Reservoir); the deepest is Deep basin at about 75 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 Lake Wilson (Wahiawā Reservoir) specifically, so confirm the current rules before you fish.
Check the official Hawaii fishing regulations →
Lake Wilson (Wahiawā Reservoir) is about 88 ft (27 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, smallmouth bass, peacock bass (tucunaré), channel catfish, bluegill, tilapia, common carp on Lake Wilson (Wahiawā Reservoir).
Shallow bay flat is the top-rated area: a weed flat in about 6 ft of water that rates prime for largemouth bass in spring. The interactive chart above rates every spot for each species and season.
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 Lake Wilson (Wahiawā 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.
Upper Helemano Reservoir 2 mi · Kapaia Reservoir 95 mi · Halenanahu Reservoir 95 mi · Waita Reservoir 95 mi · Wailua Reservoir 96 mi · Mauka Reservoir 97 mi · Crater Reservoir 97 mi · Aepoeha Reservoir 97 mi · Aepo Reservoir 98 mi · Waiakalua Reservoir 99 mi · Puu Ka Ele Reservoir 100 mi · Ipuolono Reservoir 101 mi
See how Lake Wilson (Wahiawā Reservoir) stacks up: best largemouth bass lakes in Hawaii · best peacock bass (tucunaré) lakes in Hawaii · best tilapia lakes in Hawaii · best bluegill lakes in Hawaii
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.