Fishing Forecast · Minnesota · Updated August 2026

Disappointment Lake

Disappointment Lake earns a null for water quality. This forecast reads its measured clarity, depth, and trophic state — with each species' biology, the sun and moon, and today's conditions — to call when the fish move on Disappointment Lake and how to catch them.

54 ft
max depth: 6
fish species: 13.5 ft
water clarity: Natural lake
water body

Today · Fri Aug 7

★★★★★

The bite on Disappointment Lake today. Sunrise 5:49 AM, sunset 8:32 PM.

Moon: Waning Crescent · 32%
Major windows: 6:35 PM–8:35 PM · 7:05 AM–9:05 AM

Best day · next 2 weeks

Thu Aug 13

★★★★★

New Moon moon (0%). Fish the major windows at 12:37 AM and 1:02 PM.

Fishing Forecast for Disappointment Lake

A multi-factor outlook built from Disappointment Lake's measured water quality — clarity, trophic state, depth, and water-body type — combined with each species' biology, seasonal patterns, and today's live weather. It flags spawn timing, where the fish hold, and the techniques that fit this lake's water, not just the moon.

Walleye

Game FishSummerSummer pattern

Slow

~70°F est.

Disappointment Lake runs 13.5 ft of clarity — so walleye feed hardest at dawn, dusk, and after dark — lean on finesse presentations and light line.

Because Disappointment Lake averages 13.5 ft of visibility (clear), so walleye feed hardest at dawn, dusk, and after dark — lean on finesse presentations and light line.
Its oligotrophic nutrient level puts the summer weedline near 15–20 ft — that edge is the high-percentage zone to hold walleye through the warm months.
With a max depth of 54 ft, Disappointment Lake is deep enough to stratify in summer, so coldwater fish hold near the thermocline while warmwater fish stay above it.

Techniques for clear water

finesse jig-and-minnowlong leaders / lighter linefish dawn, dusk & after dark

Season-by-season on Disappointment Lake

Season	Where	Structure	How
Spring	shallow 3–10 ft	rock/gravel bars, warming shoreline, river mouths	jig-and-minnow, slow-rolled swimbaits
Summer	mid-depth 12–25 ft	main-lake points, mid-lake humps, weed edges	live-bait rigs, bottom bouncers/crawler harnesses
Fall	variable 8–30 ft	steep breaks and points as they feed up	jigging bigger minnows, trolling deep cranks
Winter / Ice	8–25 ft	first breaks off structure, dusk feeding windows	jigging spoons and rattle baits, deadstick minnows

Smallmouth Bass

Game FishSummerSummer pattern

Very Good

~70°F est.

Disappointment Lake runs 13.5 ft of clarity — so finesse presentations and natural colors on light line tend to out-fish reaction baits.

Because Disappointment Lake averages 13.5 ft of visibility (clear), so finesse presentations and natural colors on light line tend to out-fish reaction baits.
Its oligotrophic nutrient level puts the summer weedline near 15–20 ft — that edge is the high-percentage zone to hold smallmouth bass through the warm months.
With a max depth of 54 ft, Disappointment Lake is deep enough to stratify in summer, so coldwater fish hold near the thermocline while warmwater fish stay above it.

Techniques for clear water

drop-shot & ned rignatural crayfish/goby colorslong spinning leaders — clarity is their edge

Season-by-season on Disappointment Lake

Season	Where	Structure	How
Spring	shallow 4–12 ft	rocky flats, gravel points, boulder shoals	tubes, ned rigs, jerkbaits
Summer	mid 10–25 ft	main-lake rock, reefs, deep points	drop-shot, tubes, deep cranks
Fall	variable 8–30 ft	rock structure, baitfish schools	jerkbaits, blade baits, hair jigs
Winter / Ice	deep 20–40 ft	deep rock (open-water fishery where legal)	slow blade baits, hair jigs

Northern Pike

Game FishSummerSummer pattern

Fair

~70°F est.

Disappointment Lake runs 13.5 ft of clarity — so finesse presentations and natural colors on light line tend to out-fish reaction baits.

Because Disappointment Lake averages 13.5 ft of visibility (clear), so finesse presentations and natural colors on light line tend to out-fish reaction baits.
Its oligotrophic nutrient level puts the summer weedline near 15–20 ft — that edge is the high-percentage zone to hold northern pike through the warm months.
With a max depth of 54 ft, Disappointment Lake is deep enough to stratify in summer, so coldwater fish hold near the thermocline while warmwater fish stay above it.

Techniques for clear water

jerkbaits & bucktailsnatural perch/cisco colors

Season-by-season on Disappointment Lake

Season	Where	Structure	How
Spring	shallow 2–8 ft	weedy bays, marsh mouths, warming flats	spoons, spinnerbaits, big soft plastics
Summer	weed edges 6–18 ft; big pike deeper/cooler	cabbage/coontail edges, deep weedlines, cool water	large spoons, jerkbaits, dead-bait for big fish
Fall	variable 6–25 ft	deep weed edges, drop-offs, cisco/tullibee lakes	big swimbaits, sucker/dead-bait rigs — trophy season
Winter / Ice	6–20 ft	weed edges and flats	tip-ups with large shiners/suckers

Rock Bass

PanfishSummerSummer pattern

Very Good

~70°F est.

Disappointment Lake runs 13.5 ft of clarity — so finesse presentations and natural colors on light line tend to out-fish reaction baits.

Because Disappointment Lake averages 13.5 ft of visibility (clear), so finesse presentations and natural colors on light line tend to out-fish reaction baits.
Its oligotrophic nutrient level puts the summer weedline near 15–20 ft — that edge is the high-percentage zone to hold rock bass through the warm months.
With a max depth of 54 ft, Disappointment Lake is deep enough to stratify in summer, so coldwater fish hold near the thermocline while warmwater fish stay above it.

Techniques for clear water

small jigs & crayfish plastics

Season-by-season on Disappointment Lake

Season	Where	Structure	How
Spring	shallow 3–10 ft	rock, boulder, gravel banks	small jigs, live bait, crankbaits
Summer	mid 6–18 ft	rock structure, docks	jigs, small soft plastics
Fall	mid 6–18 ft	rock structure	jigs and live bait
Winter / Ice	10–20 ft	deeper rock	small jigs

Cisco (Tullibee)

Trout, Salmon & ColdwaterSummerSummer pattern

Fair

~70°F est.

Disappointment Lake runs 13.5 ft of clarity — so finesse presentations and natural colors on light line tend to out-fish reaction baits.

Because Disappointment Lake averages 13.5 ft of visibility (clear), so finesse presentations and natural colors on light line tend to out-fish reaction baits.
Its oligotrophic nutrient level puts the summer weedline near 15–20 ft — that edge is the high-percentage zone to hold cisco (tullibee) through the warm months.
With a max depth of 54 ft, Disappointment Lake is deep enough to stratify in summer, so coldwater fish hold near the thermocline while warmwater fish stay above it.

Techniques for clear water

tiny jigs & spoons for suspended fish

Season-by-season on Disappointment Lake

Season	Where	Structure	How
Spring	deep/suspended	suspends in the cold basin	not commonly targeted
Summer	deep near thermocline	cold oxygenated layer	small jigs/flies where legal
Fall	shallow late fall	moves shallow to spawn	small spoons and jigs
Winter / Ice	15–40 ft	suspended over the basin	tiny spoons and jigs — a fun ice target

Cisco presence indicates a healthy, cold, oxygen-rich lake; sensitive to warming.

The outlook is a transparent heuristic weighting of established angling factors, this lake's measured water quality, and live conditions — not a validated catch predictor. Water temperature is estimated from season and latitude unless a recent USGS gauge reading is available. Planning a meal? Check fish-consumption advisories for Disappointment Lake. Always follow current state regulations.

14-Day Fishing Calendar

Plan the next two weeks on Disappointment Lake. Anglers target northern pike, rock bass, smallmouth bass, tullibee (cisco), and others on Disappointment Lake.

Date	Rating	Moon	Sunrise	Sunset	Major Periods	Minor Periods
Fri, Aug 7	☆☆☆☆☆	Waning Crescent 32% lit	5:49 AM	8:32 PM	6:35 PM – 8:35 PM 7:05 AM – 9:05 AM	11:10 PM – 12:10 AM 4:14 PM – 5:14 PM
Sat, Aug 8	☆☆☆☆☆	Waning Crescent 23% lit	5:51 AM	8:31 PM	7:36 PM – 9:36 PM 8:07 AM – 10:07 AM	11:54 PM – 12:54 AM 5:25 PM – 6:25 PM
Sun, Aug 9	☆☆☆☆☆	Waning Crescent 14% lit	5:52 AM	8:29 PM	8:40 PM – 10:40 PM 9:12 AM – 11:12 AM	12:55 AM – 1:55 AM 6:22 PM – 7:22 PM
Mon, Aug 10	½☆☆☆☆	Waning Crescent 8% lit	5:53 AM	8:27 PM	9:44 PM – 11:44 PM 10:15 AM – 12:15 PM	2:11 AM – 3:11 AM
Tue, Aug 11	★½☆☆☆	Waning Crescent 3% lit	5:55 AM	8:26 PM	10:46 PM – 12:46 AM 11:15 AM – 1:15 PM	7:05 PM – 8:05 PM 3:36 AM – 4:36 AM
Wed, Aug 12	★★☆☆☆	New Moon 0% lit	5:56 AM	8:24 PM	11:44 PM – 1:44 AM 12:11 PM – 2:11 PM	7:36 PM – 8:36 PM 5:03 AM – 6:03 AM
Thu, Aug 13	★★½☆☆	New Moon 0% lit	5:57 AM	8:22 PM	12:37 AM – 2:37 AM 1:02 PM – 3:02 PM	8:00 PM – 9:00 PM 6:28 AM – 7:28 AM
Fri, Aug 14	★½☆☆☆	Waxing Crescent 2% lit	5:59 AM	8:21 PM	1:27 AM – 3:27 AM 1:51 PM – 3:51 PM	8:19 PM – 9:19 PM 7:49 AM – 8:49 AM
Sat, Aug 15	★☆☆☆☆	Waxing Crescent 6% lit	6:00 AM	8:19 PM	2:14 AM – 4:14 AM 2:36 PM – 4:36 PM	8:36 PM – 9:36 PM 9:07 AM – 10:07 AM
Sun, Aug 16	☆☆☆☆☆	Waxing Crescent 12% lit	6:01 AM	8:17 PM	2:59 AM – 4:59 AM 3:21 PM – 5:21 PM	8:52 PM – 9:52 PM 10:22 AM – 11:22 AM
Mon, Aug 17	★☆☆☆☆	Waxing Crescent 20% lit	6:03 AM	8:15 PM	3:44 AM – 5:44 AM 4:06 PM – 6:06 PM	9:08 PM – 10:08 PM 11:36 AM – 12:36 PM
Tue, Aug 18	★★☆☆☆	Waxing Crescent 29% lit	6:04 AM	8:13 PM	4:29 AM – 6:29 AM 4:52 PM – 6:52 PM	9:26 PM – 10:26 PM 12:48 PM – 1:48 PM
Wed, Aug 19	★★½☆☆	Waxing Crescent 39% lit	6:06 AM	8:12 PM	5:16 AM – 7:16 AM 5:40 PM – 7:40 PM	9:48 PM – 10:48 PM 1:59 PM – 2:59 PM
Thu, Aug 20	★½☆☆☆	First Quarter 50% lit	6:07 AM	8:10 PM	6:04 AM – 8:04 AM	10:14 PM – 11:14 PM 3:06 PM – 4:06 PM

Server-rendered 14-day calendar starting 2026-08-07. Live in your browser shortly.

Methodology

How this forecast works

A plain solunar table only knows the moon. The LakeQuality Fishing Forecast starts there and adds what actually decides where and how fish bite on Disappointment Lake — factors we measure rather than guess:

Water clarity — Disappointment Lake's Secchi reading flips the playbook between clear-water finesse and stained-water reaction baits, and sets the low-light bite window.
Trophic state & depth — nutrient level and max depth set the summer weedline and whether the lake stratifies, which tells you how deep to fish.
Water-body type — natural lake vs. reservoir changes the structure that holds fish.
Species & season — each species' spawn-temperature window and seasonal movements, matched to the lake's estimated water temperature.
Sun & moon — the solunar major/minor periods and dawn/dusk twilight in the calendar below.

The species outlook is a transparent heuristic weighting of these established factors, and it now also factors in today's live conditions — wind, cloud cover, and the barometric (pressure) trend, recomputed for the current day. It's not a validated catch predictor, and water temperature is still an estimate from season and latitude unless a recent USGS gauge reading exists. It's the analysis a solunar table can't do, grounded in Disappointment Lake's real, measured water quality.

How to read the calendar

Major periods (≈2 hours) are centered on lunar transit (when the moon is highest in the sky) and lunar opposition (when the moon is directly underfoot). These are typically the strongest feeding windows.

Minor periods (≈1 hour) are centered on moonrise and moonset. They're secondary windows that often produce well — especially when they coincide with sunrise or sunset.

Day rating combines moon phase (peak near new and full moons, when lunar gravity is strongest) with the overlap of major periods and the dawn/dusk twilight. A 4–5 star day stacks all three.

At Disappointment Lake (lat 47.98°N), the longest day of the year is around June 21 with 16h 3m of daylight. The shortest is around December 21 with 8h 22m. Plan summer trips around the early-morning bite (as early as 5:00 AM) and the long evening window before sunset.

Frequently asked questions

What makes this better than a solunar fishing table for Disappointment Lake?

A solunar table only uses the moon. The LakeQuality Fishing Forecast adds Disappointment Lake's measured water quality — its clear water, trophic state, depth, and water-body type — matched to each species' spawn window and seasonal movements. That measured data drives where the fish hold and which techniques fit this lake's water, then the solunar calendar below adds the sun/moon timing. It's a transparent, multi-factor outlook, not a validated catch guarantee.

What is the best time to fish Disappointment Lake today?

Today's solunar calendar for Disappointment Lake (lat 47.98, lon -91.36) shows sunrise at 5:49 AM and sunset at 8:32 PM. The strongest fishing windows are around major solunar periods at 6:35 PM–8:35 PM and 7:05 AM–9:05 AM, plus the 30-90 minutes around dawn and dusk.

What does the moon phase mean for fishing Disappointment Lake?

Solunar theory holds that fish activity peaks during major periods (when the moon is overhead or directly underfoot) and minor periods (moonrise and moonset). Fish feeding tends to intensify during the days surrounding the new moon and full moon, when lunar gravity is strongest. Today's moon at Disappointment Lake is Waning Crescent (32% illuminated).

When are the longest and shortest days at Disappointment Lake?

At Disappointment Lake's latitude (47.98°N), the longest day of the year is around June 21 with about 16h 3m of daylight. The shortest day is around December 21 with about 8h 22m of daylight. Sunrise and sunset shift by roughly 6 hours between solstices.

Are major or minor solunar periods more important?

Major periods (about 2 hours, centered on lunar transit and lunar opposition) are generally considered the strongest feeding windows. Minor periods (about 1 hour, centered on moonrise and moonset) are secondary but still productive — especially when they overlap with sunrise or sunset.

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The species outlook is a transparent, multi-factor heuristic built from Disappointment Lake's measured water quality (clarity, trophic state, depth, water-body type) and established species biology, and it now also factors in today's live conditions — wind, cloud cover, and the barometric (pressure) trend, recomputed for the current day. It's not a validated catch predictor, and water temperature is still an estimate from season and latitude unless a recent USGS gauge reading is available. Solunar times use lat/lon and Meeus astronomical formulas, shown in Central Time. Always check local regulations and current conditions before fishing.

Source: EPA National Aquatic Resource Surveys, 2026.

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