S8, Ep 53: Cool Waters and Hot Days: Mac Brown’s Guide to Summer Fishing
Episode Overview
With freestone trout streams across the Southeast pushing into the upper 60s and low 70s by mid-morning, serious anglers need a plan for beating the summer heat. On this Casting Angles installment of The Articulate Fly fly fishing podcast, host Marvin Cash and Master Casting Instructor Mac Brown of Mac Brown Fly Fish and Fly Fishing Guide School in Bryson City, North Carolina, break down how to keep catching trout — or productively wait it out — when peak summer temperatures push freestone fishing to its limits.
Mac and Marvin agree that the dog days of summer call for a shift in strategy rather than a day off the water. The conversation centers on East Tennessee's Watauga and South Holston tailwaters along with Western North Carolina's Nantahala, all three of which hold cold water for much of the day, plus the Clinch River below Norris Dam and the deep, cold Fontana Dam tailwater. By contrast, the Tuckasegee ("the Tuck") is a tailwater that doesn't run nearly as cold as the others, since its dam doesn't create enough head to keep the release chilled. The pair walk through the early-morning window — roughly daylight to 9:30 or 10 a.m. — as the best bet for active trout before heat shuts things down, and they recommend checking USGS gauges and the TroutRoutes app to confirm flows and water temperatures before heading out. When conditions simply aren't fishable, Mac and Marvin suggest reinvesting that time in casting practice or fly tying rather than forcing a trip. The episode closes with a teaser for Mac's upcoming fall casting schools, with full details and dates available at macbrownflyfish.com.
Key Takeaways
- How to identify which regional tailwaters — the Watauga, South Holston, Clinch and Fontana releases — hold consistently cold, fishable water when freestone streams push past 69–70°F by mid-morning.
- Why fish in bigger bodies of water retreat to deeper, cooler holds as afternoon temperatures climb, making them much harder to reach with a fly.
- When to fish the early-morning window, roughly daylight to 9:30 or 10 a.m., for the best shot at active trout before the summer heat shuts down the bite.
- How to use USGS gauges and the TroutRoutes app to check release schedules and water temperatures before committing to a trip.
- Why elevation alone doesn't guarantee cold water, since even streams near 6,700–6,800 feet can push toward 70°F by mid-morning in peak summer heat.
- When to redirect fishing time toward casting practice or fly tying rather than forcing a trip into conditions that are too warm to fish well.
Techniques & Gear Covered
The core strategy discussed is prioritizing tailwaters over freestones during peak summer heat, since dam-regulated flows on rivers like the Watauga and South Holston hold consistently cold water while freestone streams climb toward 70°F by mid-morning regardless of elevation. Mac and Marvin recommend checking USGS stream gauges alongside the TroutRoutes app, a podcast sponsor (Use ARTFLY20 for 20% off), to review flow schedules and available water-temperature data before planning a trip. They also frame the early-morning window, from daylight until roughly 9:30 or 10 a.m., as the most productive stretch before warming water pushes safe fishing out of range. For anglers boxed in by travel or work schedules that don't line up with cooler weather, the hosts suggest using the downtime productively — working on casting fundamentals on a soccer field or similar open space, or tying flies indoors until conditions improve.
Locations & Species
The conversation centers on East Tennessee's two primary trout tailwaters, the Watauga and South Holston, along with the Nantahala in Western North Carolina — all three of which stay cold thanks to dam releases even as regional air temperatures spike. Mac also points to the Clinch River below Norris Dam in Tennessee — including a weir section that was fishing well as of a recent report — and to Fontana Dam's tailwater, where depth of nearly 470 feet keeps discharge in the low 50s even at the height of summer. By contrast, the Tuckasegee ("the Tuck") is a tailwater in Mac's home area that doesn't run nearly as cold, since its dam doesn't create enough head to chill the release the way the others do. Across all of these waters the target species is trout, with the guidance shaped entirely around peak summer heat: freestone streams in the region are pushing toward 69–70°F by 10 a.m. even at elevations of 6,700–6,800 feet, making the cold, stable tailwaters the more reliable option through the hottest stretch of the season.
FAQ / Key Questions Answered
Why is trout fishing difficult during peak summer heat?
As water temperatures climb through the day, trout in bigger bodies of water move deeper to find cooler conditions, which makes them much harder to reach with a fly. Even high-elevation freestone streams in the region can push toward 69–70°F by mid-morning, which is enough to shut down activity. Trout mortality rises significantly as water temperatures rise into the upper 60s making catch and release angling unethical. The trout will usually die post release.
What time of day should anglers target trout streams during hot summer weather?
The best window is early morning, roughly from daylight until 9:30 or 10 a.m., before water temperatures climb into the range that suppresses feeding activity and endangers trout post release. After that window closes, Mac and Marvin suggest shifting plans rather than fishing through the heat of the day.
How can anglers check water conditions before a summer fishing trip?
Marvin recommends checking release schedules and water temperatures using USGS stream gauges, along with the TroutRoutes app, which provides flow data and, on streams equipped with temperature gauges, water-temperature readings as well.
Which tailwaters stay fishable through peak summer heat in this region?
East Tennessee's Watauga and South Holston rivers hold cold water for much of the day. The Clinch River below Norris Dam and the Fontana Dam tailwater in Western North Carolina, which runs in the low 50s even in summer due to the dam's nearly 470-foot depth, are two other reliable cold-water options mentioned in the episode.
What should anglers do when conditions are too hot to fish safely and effectively?
Rather than forcing a trip into unproductive and unsafe heat, Mac and Marvin suggest using that time to work on casting fundamentals or to tie flies indoors, and to wait for a seasonal cool-down, which typically arrives as August progresses.
Related Content
S8, Ep 50 - Navigating Summer Waters: Ellis Ward on Trout, Musky and the Art of the Evening Bite
S8, Ep 49 - Mastering the Cast: Mac Brown's Insights on Shooting Line
S8, Ep 45 - Casting Fundamentals: Mac Brown on the Art of the Reach Mend
S8, Ep 41 - Offbeat Seasons and Terrestrial Tactics: Mac Brown's Fishing Strategies
S8, Ep 48 - Summer Heat Strategies: Captain Brian Shumaker's Smallmouth Tips
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Hey folks, it's Marvin Cash, the host of The Articulate Fly. We're back with another Casting Angles with the man himself, Mac Brown. Mac, how are you?
Mac BrownI'm doing great. How are you doing, Marvin?
Marvin CashI'm just trying to stay cool. How about you?
Mac BrownWell, it's, it's far from cool I guess these days still. But we're about to get another little thunder shower it looks like here pretty shortly. That'll cool us down a little.
Marvin CashYeah, we're walking into the dog days of summer. We're gonna get a cool off later this week, but it's kind of tough and we were kind before we started recording, folks.We're really kind of talking about, you know, making lemonade. Cause this is really not a great time to go chase trout, right?
Mac BrownNo, it's really not. Unless you got somewhere that's gonna be. Stay, stay constant, you know, close to constant temperature like a tailwater.For the most part it's getting a little bit on the warm side. You can go early, you like at daylight till 9:30 or so and, and find some fish active activity.But after about 9:30, 10 o', clock, it starts to get a little bit too warm.
Marvin CashYeah. And I would say, you know, the change up that we suggest, you can still go fish for warm water stuff.But what's happening particularly on bigger bodies of water is as the days get hotter and the water gets warmer, the fish just go deeper and you kind of get to a point where it's really, really hard to get them on a fly ride. So that's something to think about. But like Mac said, you know, we're very, very lucky in this part of the world.We got two great tail waters in East Tennessee. The Watauga and the South Holston. And the Watauga during the summer has a recreational flow for a good chunk of the day.So there's water and there's cold water in there pretty much all the time.
Mac BrownThat's right.
Marvin CashYeah.
Mac BrownAnd that's a good thing having the tail waters, you know, East Tennessee, Watauga, Holston, I mean Nantahala over here. The Tuck is a tailwater just doesn't seem to come out that cold. You know, it's not at all like, like those other three.So even though it's a tailwater, it's just. There's not enough fight there with the dams where it comes out, you know, stays cold like, like it should. So. So yeah, another one's the clinch.I. I had a buddy that was on the Clinch last week and he Gave me an update on that and that was actually fishing pretty well. They got a weir. There's a weir below the dam there below Norris, Tennessee and that's another good tailwater if somebody's over there close to that.But for the most part, other than those four, those are probably the four that come to mind.
Marvin CashYeah. And so I would say folks, you can kind of check release schedules and water temperatures using USGS gauges.And you know, the app that I always use, they're a sponsor of the podcast is TroutRoutes. That's a great place to go and look at flow data.Not all streams and rivers have temperature gauges on them, but the ones that do, you can look at that in the app.And so that's a good way too to kind of do your homework because, you know, nothing's worse than getting up early and finding out the water still warm to fish, right Mac Brown?
Mac BrownYeah, that's right. And it could we. I've been going down some to to the below the Tennessee river system here below Fontana. That's actually really good right now.It stays really cold. Of course, Fontana's the second tallest dam in the country and 470 foot deep.So the water coming out of that stays right at the low 50s, so even this time of year. So that's, that's a nice relief. You know, build a fine cold water like that.But for the most part, the average temperature on these freestones is getting up around 69 to 70 degrees by 10 o'. Clock.And that's even the streams coming out at 6,800 or 6,700ft elevation. So that gives people an idea. If it's getting that kind of temperature with that kind of elevation, then it's getting on the warm side.
Marvin CashYeah. And I would say too, you know, we're going to get a bit of a cool off and you know, the real trick is right.You know, like when I was talking to Mac about this before we started recording, he lives in Bryson City, so it's easy for him to walk out the front door and go fish for a couple hours and go do something else, but kind of hard to travel.And so if you're in that situation where you're working or you need to travel and you're trying to match up with good weather conditions, sometimes the best thing you can do is just say, I'm going to wait until we know it's cooler. And when you have time that you want to do fishy stuff, you can work on your casting early and late. You know, on A soccer field.Or you can stay in the air condition and watch baseball and drink beer and tie flies.
Mac BrownThere you go. Yeah. Tying flies. That sounds like a good plan, too.
Marvin CashYeah.Cause that's, you know, baseball right now is the only game we've got going on because we'll, I guess we'll start seeing the first preseason NFL football game here in about a month. And those aren't really worth watching unless you really follow a team.But, you know, drinking cold beers or seltzer waters or lemonade and tying flies in the air condition is not a bad way to make the next, you know, few weeks go a little bit faster.
Mac BrownThat's right. And it'll be here before we know it. I mean, a lot of times it'll cool off big once August rolls around, and then usually it will.I think this is probably the. The peak of it right now for heat.
Marvin CashYeah. So if we're optimistic and we're. We've given you guys a bunch of strategies to fish and. Or be fishy and not fish.Mac, when we talk about cooling off, we start to think about, like, fall schools. You want to kind of tease that with folks and tell them where to get info.
Mac BrownYeah, probably the best place is on the URL at macbrownflyfish.com and that is up there on the top menu. There's a thing with dates, and that's the easiest place to navigate all that.There's a bunch of casting schools and different types of dry fly, wet fly type schools. And there's four day schools. I mean, all the info's there. It's easiest to click that and you can go read about them.When you click it, it'll take you straight to the itinerary and tell you what it's all about.
Marvin CashAbsolutely.You know, folks, and if you have a question for me or you have a question for Mac, you know, DM me or send me an email and you might hear your question on an episode. The casting angles. And I would say, you know, you owe it to yourself to get out there and catch a few.But if it's too hot to, you know, make the most of your time on the water, practice your casting or tie some flies. Tight lines, everybody. Tight lines, Mac.
Mac BrownTight lines. Marvin.
