The Best Flies for August Trout Fishing
August trout fishing can change completely from one hour to the next. Tiny Tricos may bring trout to the surface early in the morning. Grasshoppers and ants become active as the day warms. Caddis can take over in the evening, while mayfly, midge, and stonefly nymphs continue producing below the surface.
This collection gives you the right fly for each of those situations. Whether you are fishing a Western freestone, an Eastern trout stream, a spring creek, or a cold tailwater, these 15 patterns cover the most important late-summer opportunities.
Early-Morning Trico Fishing
Tricos are one of the most important August hatches. They often emerge and form spinner falls during the morning, creating steady rises in pools, glides, and soft water below riffles.
Use the Sunken Trico when trout are eating drowned spinners beneath the surface. This is especially effective when you see rising fish but cannot get a response to a floating fly. A Sunken Trico can be fished behind a dry fly or suspended just below the surface.
Midday Hopper and Terrestrial Fishing
As the sun rises, grasshoppers, ants, and other land-based insects become more active. Wind and streamside movement knock these insects into the water, giving trout an opportunity for a substantial meal.
Use the Baby Hopper when trout are looking for a realistic grasshopper profile. Choose the Micro Chubby when you need a smaller, highly visible terrestrial that can also support a dropper. Amy’s Ant offers a different silhouette for pressured trout that have already seen too many standard hopper and Chubby patterns.
Cast terrestrials near grassy banks, overhanging trees, undercut banks, and shaded structure. A gentle “plop” can help imitate a natural insect falling into the water.
When Caddis Are Emerging
Caddis can be active throughout the summer, particularly during the morning and evening. The correct fly depends on where the trout are feeding.
Use the Elk Hair Caddis when adults are moving across the surface or when you need a buoyant fly for broken water. Switch to the X Caddis when trout are targeting vulnerable emergers or crippled caddis trapped in the surface film.
If the fish are feeding below the surface, tie on the Holy Grail – Tungsten. It is an excellent imitation of caddis larvae and emerging pupae and sinks quickly into the feeding zone.
When Mayflies Are Hatching
August mayfly activity can include Pale Morning Duns, Blue Winged Olives, and other smaller late-summer mayflies.
The Split Case PMD imitates a mayfly nymph preparing to emerge and is an excellent choice before or during a PMD hatch. The Parachute Adams provides a natural mayfly silhouette on the surface and can imitate several different mayflies depending on the size selected.
Below the surface, the CDC Pheasant Tail – Tungsten and Olive Quill Perdigon are dependable choices. Fish them when you see mayflies around the water, when trout are feeding without rising, or when you simply need a natural-looking nymph that gets down quickly.
Stoneflies in Fast or Rocky Water
Yellow Sallies and Golden Stones remain important on many rivers during summer.
Use the Yellow Sally when small yellow stoneflies are flying near the water or returning to lay eggs. The Natural Golden Stone – Tungsten is the better choice for deep runs, fast riffles, and rocky water where trout are feeding on stonefly nymphs.
The heavier Golden Stone also makes an effective anchor fly with a smaller mayfly or midge pattern tied behind it.
Tailwaters and Selective Trout
Midges remain essential in cold tailwaters, spring creeks, and other fisheries where trout regularly feed on small insects.
The UV Zebra Midge Perdigon is ideal when fish are feeding on tiny subsurface insects or refusing larger patterns. Its slim profile and tungsten bead help it reach feeding depth quickly.
When water is deep, slightly stained, or moving quickly, try the Hot Head Guide’s Choice. Its bright bead and buggy profile help trout locate the fly when a subtle nymph is not getting noticed.
What Is the Best August Fly?
The best August fly is the one that matches the situation in front of you. Start with Tricos or small nymphs during the morning. Fish hoppers and ants near the banks as the day warms. Watch for caddis and mayflies during cooler periods, and switch to weighted nymphs whenever trout stop feeding on the surface.
With the right mix of dries, emergers, terrestrials, and tungsten nymphs, you can stay prepared as August conditions change throughout the day.
