Cold Water, Big Rewards: Winter Fly Fishing Strategies
September 3, 2025
September on the Brazos in North Texas has a certain kind of energy. The blazing heat of summer begins to loosen its grip, mornings arrive with a little more coolness, and you can sense the first hints of fall sneaking in. On the Brazos River near Granbury, this month signals an important transition for both anglers and wildlife alike. The river is alive with change, and for us at Fatties on the Fly, September is one of the most exciting times to be on the water.
By early September, water flows from Lake Granbury typically settle into more predictable patterns compared to the rollercoaster of summer. The lower water levels and clearer conditions make sight-fishing opportunities more frequent. Carp and gar, which thrive in these warm, stable flows, are still high on our list of targets. Their feeding behavior is aggressive, and stalking them in shallow flats with a fly rod is as technical and rewarding as any saltwater flat in the world.
Spotted bass and largemouth bass also respond well this time of year. The summer heat often pushes them deeper or keeps them lethargic, but as the days shorten and temperatures begin to drop, bass start moving shallower, looking to fatten up before winter. September is the month when our anglers start to notice more consistent topwater action—whether it’s a popper tossed under shaded banks or a streamer swung through current seams, the Brazos bass make their presence known.
What makes September special is variety. On any given day, you might be sight-casting to a pod of golden carp, then shifting gears to chase surface-feeding spotted bass, and still have time to tempt a gar lurking in the shallows. The mix keeps every trip dynamic.
This is also the time when mornings and evenings become prime windows. The sun isn’t as punishing, which means longer, more comfortable sessions on the water. Add in the subtle changes in insect hatches, and you’ll find fish feeding with more consistency. For fly anglers, it’s the perfect moment to experiment—small baitfish patterns, crawfish imitations, and even terrestrial flies can all draw strikes.
While September still feels like summer in many ways, it’s the month that sets the stage for the fall bite. As the weather continues to cool into October and November, the Brazos transitions into some of its most productive fishing of the year. Bass will feed heavily in preparation for winter, and our sight-fishing trips for carp remain strong until water temps dip.
But September is more than just a bridge to fall—it’s when the river begins to breathe differently. The light changes, the pace of the days slows, and you can feel that the season of transition has started.
For many of us in Texas, September also marks the start of hunting season. Dove season kicks off, and deer hunters begin shifting their focus toward the cooler months ahead. (Check Texas Parks & Wildlife’s official hunting season dates ).
At Fatties on the Fly, we know a lot of our anglers are also outdoorsmen who split their passions between rod and rifle. That’s part of what makes this season so rich: mornings on the Brazos stalking carp, afternoons scouting deer stands, evenings with friends around a grill.
Our team is already gearing up for fall, balancing days on the river with preparing for deer season. It’s a reminder that outdoor life here isn’t about one pursuit—it’s about embracing the rhythm of Texas’ seasons.
If you’ve been thinking about booking a trip, September is a fantastic time to do it. The fishing is diverse, the river is beautiful, and the cooler weather makes for comfortable days on the water. Whether you’re looking to test your skills on wary carp, chase hard-fighting spotted bass, or just soak in the transition of summer to fall, the Brazos near Granbury has something to offer.
Book your September trip with us today and experience the Brazos in one of its most dynamic seasons.
September is a season of change—and on the Brazos, change always means opportunity. 
