What You'll Find at Bayou Castine

Bayou Castine is a shallow, narrow waterway south of Houma that holds redfish and spotted seatrout year-round, with occasional tarpon and permit in warmer months. The bayou runs roughly north to south and connects to larger systems like Terrebonne Bay, making it a transition zone between fresh and brackish water depending on rainfall and tidal push. Most fishing happens in water 2 to 5 feet deep over mud and grass bottom, where sight-casting to cruising fish is possible on clear days.

Access is limited to boat launch only — there is no bank fishing. The primary public launch is at Castine Boat Launch on Louisiana Highway 1, a concrete ramp with parking for roughly 20 vehicles and a small fee. From there, you run south into the bayou proper. The water is stained to murky most of the year, so you are fishing by sound, movement, and structure rather than sight alone.

Key Takeaways

  • Redfish and spotted seatrout are the main species; redfish peak in fall and winter, trout in spring and early summer.
  • Launch at Castine Boat Launch on Highway 1 south of Houma; the ramp is concrete and has a small fee.
  • Fish shallow grass flats and the edges of deeper channels; 2 to 5 feet of water is typical.
  • A Louisiana fishing license and saltwater stamp are required; check current regulations for redfish and trout bag limits before you go.

Seasons and What Bites When

Redfish are most active from September through March, when cooler water pushes them into the shallows and they feed aggressively. Fall (September to November) is the strongest period — water temperatures drop, baitfish concentrate, and redfish are hungry. Winter fishing is steady but slower; you will catch fish, but you may spend more time looking. Spring (March to May) sees redfish move deeper and toward the Gulf, though some stay in the bayou.

Spotted seatrout peak from April through June, when they move into shallow grass to spawn. Early morning and late afternoon are best. Summer (July to August) is slow for both species — heat and low water push fish deeper and into the larger bays. Tarpon show up occasionally in June and July in the deeper channels, but they are not reliable. Permit are rare and unpredictable.

How to Fish Bayou Castine

Redfish respond to live mullet, live shrimp, and soft plastics (3 to 4 inch paddle-tail or shrimp imitations in natural colors). Cast near grass edges, fallen trees, and channel bends. Redfish often hunt in 1 to 3 feet of water and will follow a lure 10 to 15 feet before striking. Use a 7 to 8 foot medium-power spinning rod with 15 to 20 pound braid and a 12 to 15 pound fluorocarbon leader — the water is stained enough that heavy line is not a problem.

Spotted seatrout prefer live shrimp under a popping cork or small soft plastics in white, pink, or chartreuse. Fish the shallow flats early and late in the day; trout scatter into deeper water once the sun is high. A 6 to 7 foot rod with 12 pound braid and a 10 pound leader is standard. Tarpon, if you encounter them, require heavier tackle (30 pound braid, 80 pound leader) and live mullet or large topwater plugs, but do not count on them.

Tides, Weather, and Timing

Bayou Castine is tidal but not strongly — tide range is usually 1 to 2 feet. The best fishing happens on a rising tide, when water pushes into the shallows and fish move to feed. Slack tide (the hour around high or low) is slower. Wind matters more than tide here: a south or southeast wind pushes water into the bayou and keeps it clear; a north wind drops water level and muddies it.

Early morning (first two hours after sunrise) is most productive year-round. Fish are feeding and the water is calmer. Afternoon fishing is possible but slower, especially in summer. Overcast days are better than bright sun — fish are more active and less spooky in low light. Avoid fishing during heavy rain or immediately after, when freshwater runoff muddies the water and pushes fish out.

Regulations and Licensing

You need a valid Louisiana fishing license and a saltwater stamp, available online through the Louisiana Department of Wildlife and Fisheries website or at most bait shops in Houma. The license is good for one year from the date of purchase. Nonresidents pay more than residents; check the current rates on the LDWF website.

Redfish and spotted seatrout have bag limits and size restrictions that change annually. As of recent years, redfish have a 3-fish daily limit with a 16 to 27 inch slot (fish outside that range must be released), and spotted seatrout have a 25-fish daily limit with a 12 inch minimum. These rules change, so confirm the current limits on the LDWF website or ask at your launch before you fish. Tarpon and permit are catch-and-release only.

Getting There and What to Bring

Castine Boat Launch is on Louisiana Highway 1, roughly 20 miles south of Houma. From downtown Houma, take Highway 1 south toward Grand Isle; the launch is on the right (west) side of the road. GPS coordinates are approximately 29.15°N, 90.68°W. Parking is available but limited; arrive early on weekends. The ramp is concrete and in decent condition, though it can be soft after heavy rain.

Bring a shallow-draft boat — a 16 to 18 foot center console or skiff with a 4 to 6 inch draft is ideal. The bayou is narrow and shallow; deep-V hulls will run aground. A push pole or trolling motor is useful for stalking fish in the shallows. Bring plenty of water, sunscreen, and a hat — there is no shade on the water. Bait shops in Houma (check locally for current names and hours) sell live shrimp and mullet; you can also catch your own with a cast net if you know how.

Challenges and What to Expect

Bayou Castine is not a high-volume fishery — you may catch 2 to 5 redfish or trout on a good day, not 20. The water is often stained, so sight-casting is rare. Mosquitoes are heavy in summer and fall, especially at dawn and dusk. Alligators are present but rarely aggressive; keep your distance and do not feed them.

The bayou is narrow and can feel crowded on weekends during peak season (September to November). Shallow water means you can run aground if you do not know the channel — ask locals at the launch for the safest route. Weather can change fast; check the forecast before you go and be ready to head back if wind picks up or a storm approaches.

Frequently Asked Questions

Do I need a guide to fish Bayou Castine?

No, but a guide is helpful if you have never fished the bayou before. Local guides know the channels, the seasonal patterns, and where fish are holding on any given day. Expect to pay $300 to $500 for a half-day trip. If you go on your own, arrive early, fish the edges of grass flats and channels, and be patient.

What is the best month to fish here?

October and November are peak for redfish — water is cooling, fish are hungry, and the weather is pleasant. April and May are best for spotted seatrout. If you want the highest chance of catching fish, plan for fall or spring.

Can I fish at night?

Yes, and night fishing for redfish can be productive, especially in summer when daytime heat pushes fish deep. Use topwater plugs or large soft plastics and fish the channel edges. Bring a headlamp and tell someone where you are going.

What if the water is too muddy to fish?

Muddy water happens after heavy rain or strong north wind. Fish still bite, but you have to rely on sound and vibration — use larger lures, brighter colors, and work the edges of channels where water is slightly clearer. If visibility is less than 6 inches, consider waiting a day or two for conditions to improve.

Are there other fish species I might catch?

Occasionally, yes. Sheepshead, black drum, and catfish are present but not the target. Tarpon and permit are rare. Mullet and ladyfish are common but small. Focus on redfish and trout for the best chance of a solid day.