Red drum in
North Carolina.

The year, season by season

Summer (June–August): slot-size fish spread across the grass flats: shallow estuarine seagrass with oyster and marsh edge nearby. This is the classic sight-fishing season, and the fish are where the habitat is.

Fall (September–November): the big adults, the bull drum, stage near inlets to spawn. It's the season of giants, and it happens at the mouths, on hard structure adjacent to moving water.

Winter (December–February): fish pull off the flats and ball up in deeper creek holes, riding out the cold in tight groups. Find one and you've found fifty; the water around them is mostly empty.

Spring (March–May): fish return to shallow water as it warms. NC field research puts the return between late March and late April depending on how fast the spring warms. A cold year runs weeks behind a warm one on the same calendar.

When they actually feed

The measured feeding chronology from NC's Cape Fear River is blunt: red drum feed hardest after dark, likely switching on around sunset, and their stomachs empty out through the daylight hours. Daytime feeding happens; the studies call it intermittent. But dawn, dusk, and night are when the chart tilts in your favor. Pisces builds this chronology into the summer and spring forecast hours, which is why the same spot scores differently at noon and at last light.

Depth and water

NC telemetry and survey work keeps finding the same pattern for the slot-size fish anglers target: abundance rises as bottom depth falls. These are shallow-water fish, and they tolerate a wide range of salinity, from fresh-adjacent creek water to full ocean, so "too fresh" is rarely the reason they're absent.

Structure

Grass flats, oyster, marsh edges, and the drains that empty them. A drain, the channel a marsh empties through as the tide falls, concentrates bait into a conveyor, and drum use them the way you'd hope. Edges between habitat types earn attention for the same reason: two kinds of cover, one seam of ambush.

How Pisces forecasts them

Pisces maps the drains, edges, and bars in the water it covers from 1-meter laser-mapped seafloor, then scores every one of them, every hour, against the season's behavior, the tide at that spot, water temperature, and time of day. The method and its measured accuracy are laid out on the how it works page. Also worth your time: southern flounder and black drum, which use the same water very differently.

Sources

• Stewart & Scharf, 2008. Estuarine recruitment, growth, and first-year survival of juvenile red drum in North Carolina. Trans. Am. Fisheries Soc. 137(4).
• Bacheler, Buckel & Paramore, 2012. Density-dependent habitat use and growth of an estuarine fish. Can. J. Fish. Aquat. Sci. 69(11).
• Facendola & Scharf, 2012. Seasonal and ontogenetic variation in the diet and daily ration of estuarine red drum. Marine and Coastal Fisheries 4(1).
• ASMFC, 2018. Red Drum — Life History and Habitat Needs.
• NC DEQ, 2021. Red Drum Fishery Management Plan Update.