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Diamond Lake Fishing Report

Updated Fri, Sep 4, 2026 from live gauge and weather data

Oregon's trout bowl: a Cascade caldera-country lake rebuilt into a rainbow factory, framed by Thielsen's spire and thick with 16-inch fish.

3/5
Fair. Fish the windows.A steady pattern: dawn and dusk carry the day.
Water temp
~54 F est.
Air / High
46 / 49 F
Wind
WSW 9 mph

Sources: Open-Meteo, solunar calculated for these coordinates.

Satellite view
Friday
4
September 2026

Today's Fishing Report

Generated this morning from live readings: gauge, weather model, sun and moon. A fresh report is published here every morning.

3/5Fair. Fish the windows.A steady pattern: dawn and dusk carry the day.

Diamond Lake feels the season turning: shorter days, grouping fish. Today brings cloud cover, wind WSW around 9 mph, rising pressure near 1015 hPa and a high of 49. Water sits around 54 F for the season (estimated). With the last quarter, the solunar majors run 5:39 AM-7:39 AM and 5:39 PM-7:39 PM: the windows to build the day around.

The plan, species by species

Rainbow troutGood

Blue-winged olives and midges on soft seams; streamers on overcast days move the better fish.

Brown troutGood

Pre-spawn aggression: this is streamer season for the fish of the year.

Tomorrow: Warmer at 56 F. The solunar majors shift about 50 minutes later.Next report: Sat, Sep 5, 6:30 AMHow this report is made →

Water and weather

Live readings.

No live gauge on this water

Conditions here are modeled from weather, season and the nearest stations. Water readings appear when a USGS gauge is available.

30405060JanMarMayJulSepNovSep, ~54 F now

Right now

Latest readings

Air temp46 F
High / Low49 / 37 F
WindWSW 9-14 mph
Pressure1014.7 hPa, rising
Sky / Rain80% cloud, 25%
Sunrise / Sunset06:36 / 19:38
MoonLast Quarter, 50%
Water temp (seasonal)~54 F est.

Bite planner

Hour-by-hour bite forecast for today. Tap a bar to see why.

5 AM8 AM11 AM2 PM5 PM8 PMsunrisesunsetPRIMEPRIME

Next 7 days

Tap a day for the detailed outlook.

Fri Sep 4 · Showers, 49/37 F, wind 10 mph, rain 25%

Fair or better. A 10 mph breeze puts a working chop on the banks it hits: fish the wind-blown side.

Species guide

The species that matter on Diamond Lake: seasons, structure and how to fish each one. Today's ratings live in the report above.

Rainbow trout illustration

Rainbow trout

Best: Apr-Jun, Sep-Oct

The workhorse of western rivers: riffles, seams and dry-fly eats. Blue-winged olives and midges on soft seams; streamers on overcast days move the better fish.

Brown trout illustration

Brown trout

Best: Sep-Nov

Wary, predatory and nocturnal by preference. The big ones eat streamers. Pre-spawn aggression: this is streamer season for the fish of the year.

When to come: the Diamond Lake calendar

Activity by species and month, and how the water warms through the year. Tap any cell.

Species activity by month

1 = slow, 5 = peak. Current month highlighted.

J
F
M
A
M
J
J
A
S
O
N
D
Rainbow trout
Brown trout
SlowPeak

Water temperature through the year

Typical surface temperature for this water type; today is around 54 F (estimated, not a reading).

30405060JanMarMayJulSepNovSep, ~54 F now

Angler reports

Real reports from real anglers, reviewed before publishing. The water log below tracks each day automatically.

No angler reports yet this weekBe the first: your report helps every angler who checks Diamond Lake today, and we feature the best catch of the week.

Water log, last days

Auto-logged from live data
Thu, Sep 3

4/5 Good. Solid day ahead. Stable-to-falling pressure and workable wind line things up. Rainbow trout led the card at excellent. High of 46 F, wind to 11 mph.

Wed, Sep 2

3/5 Fair. Fish the windows. A steady pattern: dawn and dusk carry the day. Rainbow trout led the card at good. High of 48 F, wind to 17 mph.

Tue, Sep 1

3/5 Fair. Fish the windows. A steady pattern: dawn and dusk carry the day. Rainbow trout led the card at good. High of 65 F, wind to 11 mph.

Where roughly, what depth, what bait. Skip anything you want to keep secret.
Only used to send you this water's report each week. No spam, ever.

Before you go

License

Oregon requires a valid fishing license for adults. Buy online from the state agency; one-day options exist for visitors.

Regulations

Oregon license. Trout: 5/day, 8-inch minimum typical: check ODFW. Tiger trout and chub-control rules: verify current.

Access

Resort marina and ramps, South Shore and Thielsen View campground launches.

About this water

3,015 acres at 5,180 ft, Douglas County, OR. The rebuilt rainbow factory of the southern Cascades.

Fishing Diamond Lake: the full guide

The comeback bowl

Diamond sits at 5,180 feet between Mount Thielsen and Mount Bailey: Oregon's flagship stocked-trout lake, famously rebuilt after the tui chub collapse (the 2006 rotenone reset remains the West's great restoration story). Today it grows rainbows fast and fat: 16-inch fish standard, 24s real: on a zooplankton-and-insect base the chubs once stole.

PowerBait to purist

The lake serves every church: bank soakers do steady business off the resort and campground shores; trollers pull wedding rings and worms at 1.5 mph over 15-30 ft; fly anglers strip leeches and chironomids from tubes in the sheltered coves at dawn. Evening rises near the drop-offs reward the patient: the lake's fish eat with high-desert confidence.

A season in the Cascades

Ice-out (April-May): the shoreline feed: everything works. Summer: mornings before the recreation fleet, deeper trolling midday, callibaetis evenings. Fall: October's cooling turns the big fish shallow again: locals' favorite. Winter: a genuine ice season (January-March) with tip-ups and jigs: check resort ice reports.

Basecamp practicalities

Diamond Lake Resort anchors services (rentals, ramps, café intel); Forest Service campgrounds ring the shore; Crater Lake sits 20 minutes south for the obligatory detour. Afternoon winds are Cascade-punctual: fish early, nap midday, return for the evening glass.

Common questions

How big do Diamond Lake rainbows get?

The average runs 14-17 inches with multi-pound holdovers common since the restoration: fall fish push 5-plus. Growth rates here are the fastest in Oregon's stocked system.

Does Diamond Lake freeze for ice fishing?

Most winters, yes: January-March with 8-20 inches typical. The resort tracks conditions: rainbows through the ice with jigs-and-bait is a growing tradition.

Is fishing good at Diamond Lake right now?

Check the daily report at the top of this page: it is regenerated every morning from live data. Today's read: Fair. Fish the windows. A steady pattern: dawn and dusk carry the day.

Nearby waters

Odell Lake29 miCrane Prairie Reservoir47 miUpper Klamath Lake54 miUmpqua River61 miEast Lake62 miFern Ridge Reservoir87 mi
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