Northeast Thailand (Isaan) — November 2026 Fishing Report
November transforms Isaan fishing from the monsoon-season survival mode of September into its cool-season peak. The Mekong River, dropping steadily through October, reaches the structural level in November that local fishermen regard as optimal: the mid-channel rocks and sandbar formations are visible and accessible, the deep backwater pools adjacent to the receding river hold concentrated populations of catfish and the river's distinctive large barb species, and the water clarity has improved to the point where the Mekong's natural fishing potential is fully accessible. The reservoir system — Ubol Ratana, Lam Pao, Nam Oon, Sirinthorn — is at the dropping-water concentration phase that produces the year's best trophy fish fishing. And on the Loy Krathong full moon, Isaan's rivers and reservoirs become some of the world's most atmospheric nighttime fishing environments.
Water and Weather
November rainfall in Northeast Thailand averages 20–40mm — the beginning of the genuinely dry season across the Khorat Plateau. The plateau's elevation means November temperatures are more comfortable than Bangkok: daytime highs of 26–30°C, evening temperatures dropping to 18–22°C, and genuinely cool mornings at 15–18°C in the upland areas near the Mekong corridor. These conditions are ideal for day-long outdoor fishing without heat stress.
The Mekong continues its monthly recession through November, dropping another 1–2 metres from its October level. By mid-November, the river is at approximately 50% of its September peak discharge — still substantial but now revealing the structural features that define its dry-season character. Sandbanks form along the inner bends; mid-channel rock formations re-emerge as current-break structures; the deep trough alongside the Thai bank becomes defined and consistent.
Reservoir levels at Ubol Ratana, Lam Pao, and Sirinthorn are dropping through their controlled mid-season ranges. The concentration effect on fish populations is at its peak through November — the fish that spread across the reservoirs' maximum flood area in September are now occupying a smaller, deeper, more structurally defined habitat.
What's Biting Now
Wallago attu (helicopter catfish) — November is the peak wallago month across the Isaan reservoir system. The dropping water level concentrates these large predatory catfish around the remaining deep features. At Ubol Ratana, the dam wall's tailwater and the deep sections of the reservoir's primary channel produce wallago through the full-moon night period reliably. Fish from 10–30kg are the typical range, with specimens to 40kg recorded in exceptional years. Live baitfish presentations on 80lb gear at anchor over deep structure.
Giant featherback (Chitala blanci) — The featherback season reaches peak November form. These distinctive predatory fish, with their deeply forked tail and elongated body, are among the Isaan's most visually spectacular catches. Night fishing with live bait or slow-retrieved large soft plastic lures in the 5–10 metre depth zone around reservoir deep points and submerged channel edges. Lam Pao and Ubol Ratana both have productive featherback populations.
Mekong sand barb (Hypsibarbus species) — As the Mekong drops and reveals its mid-channel rock structures in November, the large sand barb species that inhabit these fast-water features become accessible from boat-positioned fishing. These powerful fish — averaging 2–5kg with some to 10kg — respond to large spinners and jigs worked through the eddy margins of the re-emerging channel rocks. One of Isaan's most underrated sport fish.
Giant Mekong catfish (protected, catch-and-release only) — While this species is protected year-round, November encounters increase as the river drops and concentrates large fish in the deeper channel pools. The Chiang Saen area of upper Northern Thailand (the Mekong's Thai entry point) sees the highest November concentration. Any encounter requires immediate careful release.
Snakehead — November snakehead fishing transitions fully to the reservoir-edge and deep canal habitat as the flooded paddy fields drain completely. Slower presentations, deeper zones, channel edges rather than surface-vegetation margins.
Freshwater carp and Isok barb — The large river systems of the Mun and Chi rivers produce good bottom fishing for various carp species and the impressive Probarbus jullieni (Isok barb) in November's clear water. These fish feed actively in the cooler water on paste and natural baits.
Hampala barb — Available everywhere throughout the Isaan river and reservoir system on light lure fishing. November's cool water makes these fish particularly aggressive. Metal jigs and small minnow lures worked across submerged rocky points in the reservoirs and river inlet zones.
What to Target This Month
Top pick: Ubol Ratana wallago on the Loy Krathong full-moon night. The November full moon — Loy Krathong's celestial backdrop — coincides with the year's best wallago feeding conditions at Ubol Ratana. Arrive at the reservoir by 4 pm, observe the kratong release activities from the dam-side vantage point (genuinely spectacular — the Khon Kaen area Loy Krathong is one of Isaan's most celebrated), then begin fishing at dusk. Anchor in 8–12 metres of water over the dam wall structure with live baitfish on 80lb gear. The full-moon illuminated reservoir, the distant sound of the festival, and a wallago run in the night water is a combination unique to Isaan.
Second pick: Mekong structural fishing at Nong Khai or Nakhon Phanom. Choose a point on the Mekong where November's dropping water has revealed prominent mid-channel rock structures. Charter a local fishing boat from the riverside and spend a full day working the eddy margins of these structures with large spinners, jigs, and natural baits. Target the sand barb and large catfish species in the morning current, the deep pool sections in the midday heat, and the backwater channel mouths at sunset.
Third pick: Lam Pao Reservoir featherback night session. The featherback fishing at Lam Pao reaches its November best in the second and third weeks of the month. Hire a small boat from the reservoir's public access points and position over the 6–10 metre depth zone adjacent to the main submerged channel. Deploy live baitfish rigs and large soft plastic lures on the bottom. The featherback's nocturnal feeding habit means the most productive window runs from 8 pm to midnight — plan an overnight session with a simple camp setup on the reservoir bank.
What to Avoid
Avoid attempting Mekong main-channel wading in November — despite the substantial drop from September levels, the river's current speed remains too fast for safe wading in the main trough. Avoid night fishing from isolated Mekong bank sections without a companion — the receding river leaves unstable bank sections that can give way in the dark. Avoid the upper Chi River in Roi Et Province during the Loy Krathong festival week if nighttime fishing is the priority — the river sections near major towns are crowded with festival-goers and the water disturbance from boat traffic disrupts fishing.
Loy Krathong and the Isaan Fishing Tradition
The Loy Krathong festival, celebrated across Thailand but with particular intensity along Isaan's river and reservoir communities, has a deeply embedded connection to fishing culture. The kratong — elaborately decorated banana-leaf floats carrying candles, flowers, and incense — are released as both offering and farewell to the water's bounty of the preceding monsoon season. Local fishermen observe that the full-moon period consistently produces exceptional catfish and wallago catches, a phenomenon attributed variously to lunar-triggered feeding cycles and to the change in barometric pressure associated with the full moon. Whether mystical or biological, the pattern is reliable: fish the Isaan reservoirs on the November full moon.
Venue Spotlight
Ubol Ratana Reservoir (Khon Kaen Province) — The reservoir reaches its annual peak fishing condition in November. The combination of the dropping-water concentration effect, the wallago population at its most active, and the Loy Krathong atmosphere makes a November Ubol Ratana trip one of Isaan's most distinctive experiences. Several guesthouse operations adjacent to the dam offer overnight packages for anglers. The reservoir is also one of Isaan's most visually attractive water bodies — the surrounding forested hills and the clear November sky make for beautiful conditions.
Mekong Riverfront at Nong Khai — The provincial capital offers the most comfortable base for November Mekong fishing. The riverfront promenade provides elevated observation of the dropping river's re-emerging structures, and the local charter boat operators at the Nong Khai riverside market are accessible and knowledgeable. The town's excellent guesthouses (many with Mekong views), restaurants, and the proximity to the Thai-Lao Friendship Bridge make Nong Khai one of Isaan's most enjoyable small-city bases.
Sirinthorn Reservoir (Ubon Ratchathani Province) — The less-visited southern Isaan reservoir is an excellent November alternative for anglers approaching from the Ubon Ratchathani direction. The reservoir holds good wallago and featherback populations and sees minimal recreational fishing pressure compared to Ubol Ratana. The surrounding Pha Taem National Park area adds a trekking and viewpoint dimension to a multi-day November Ubon program.
Logistics in November
Khon Kaen Airport maintains multiple daily Bangkok connections and is the practical entry point for Ubol Ratana and the central Mekong corridor. Udon Thani Airport provides a northern gateway closer to Nong Khai. Ubon Ratchathani Airport serves the southeastern Isaan fishing destinations. November accommodation rates are at low-to-moderate levels — below the holiday-season peaks that arrive in December. Vehicle hire is available in all three cities. The key November logistics consideration is to book the Loy Krathong full-moon period accommodation well in advance — guesthouses near Ubol Ratana reservoir and the Nong Khai waterfront fill completely for the festival weekend.
Looking Ahead to December
December delivers Isaan's cool-season peak. The Mekong drops further, increasing the structural fishing potential. The reservoir fish populations are fully concentrated at their cool-season depth lies. The cold-season air temperatures (some nights in upland areas approaching 10°C) produce the Isaan's most active catfish and wallago feeding patterns. December through February is Isaan's best wild-fish quarter — plan ahead for the full cool-season program.
