Andaman — September 2026 Fishing Report
September is the Andaman's deepest monsoon month in terms of psychological commitment required from visiting anglers. The southwest monsoon is still at near-peak power through most of September, offshore swells remain significant, and the liveaboard operations to the Similan and Surin Islands that define the Andaman's world-class fishing calendar are still suspended. Yet September is not a month to write off entirely. The inshore fishery in Phang Nga Bay's protected channels, the freshwater options along the Krabi and Phang Nga river systems, and the opportunistic inshore charters from sheltered east-coast Phuket departure points all offer meaningful fishing. More importantly, September is when informed anglers begin watching the weather systems closely, knowing that October's opening is approaching.
Water and Weather
September sea conditions in the Andaman are characterised by persistent southwest swell of 2–4 metres on exposed west-coast beaches, with frequent periods of 4–6 metres during active weather. The Thai Meteorological Department typically maintains marine warnings for the outer Andaman through late September. Sea surface temperatures run 29–31°C — warm and biologically productive despite the difficult surface conditions.
Inland rainfall in the Krabi, Phang Nga, and Phuket catchments peaks in September, with totals reaching 300–400mm through the month. Rivers run high and slightly turbid but remain fishable in their upper reaches. Reservoirs and lakes across the Andaman coastal provinces are at maximum levels — freshwater fishing opportunities are at their seasonal best.
The Phang Nga Bay interior — the intricate network of limestone karsts, mangrove channels, and sheltered lagoons between Phuket and Krabi — provides genuinely protected conditions on most September days. Swell is blocked by the outer island chain, and wind within the bay rarely reaches the levels that affect coastal exposed areas.
What's Biting Now
Queenfish — The persistent queenfish presence in Andaman inshore waters continues through September. Working rocky headlands and the edges of mangrove channel entrances with surface lures and metal jigs on days with reduced swell produces fast, aggressive action. The eastern Phuket coastline from Rawai to Ao Chalong has reliable queenfish populations throughout the monsoon.
Giant trevally (inshore) — GT do not disappear during the Andaman monsoon. The rocky points and shallow reef systems of the inner Phang Nga bay hold smaller resident GT (3–8kg range) year-round. Poppers and stickbaits from accessible rocky headlands catch these fish throughout September. Large GT (20kg+) in offshore habitat are not reliably accessible this month.
Barracuda — Jetty and pier fishing around Chalong, Ao Por, and the Krabi town waterfront produces barracuda throughout September. Wire-leaded lures and small mackerel strips account for most catches. Dusk fishing is particularly productive.
Barramundi (estuary) — The Krabi River estuary and the lower Phang Nga River both hold barramundi in their mangrove sections. September's high water brings fish into new mangrove habitat. Lure fishing around mangrove roots on the incoming tidal push consistently produces. Less glamorous than an offshore Similan trip but genuinely productive September fishing.
Snapper (inshore reef) — Several sheltered inshore reef sites accessible from eastern Phuket on calm September days hold good populations of red snapper, mangrove jack, and spangled emperor. Bottom fishing with fresh bait around these reef structures produces consistent catches for the boat angler who can find a window of acceptable conditions.
Freshwater options — The Khlong Marui reservoir and the Bang River system in Phang Nga province offer snakehead, carp, and catfish fishing that is genuinely excellent in September's high-water period. The Krabi Inland Fishing Park provides a managed freshwater alternative within 20 minutes of Krabi town.
What to Target This Month
Top pick: Phang Nga Bay kayak fishing. The limestone karst channels of Phang Nga Bay provide the Andaman's best September fishing experience. A guided kayak session departing from Ao Phang Nga National Park leaves from a sheltered pier regardless of the swell state outside, and the mangrove channel fishing for small trevally, barracuda, and occasional barramundi is genuinely productive. The scenery is extraordinary and the fishing is legitimately satisfying.
Second pick: Krabi River estuary barramundi session. Charter a local longtail boat for a four-hour evening session in the Krabi River mangroves. The incoming evening tide from 5 to 8 pm pushes barra into the mangrove root systems along the lower river's east bank. Lures worked tight to structure produce fish from 1–4kg, with occasional larger specimens. A very accessible September option from Krabi town.
Third pick: Eastern Phuket inshore reef on a calm window. Watch the marine forecast for a rare September day with swell below 1.5 metres on the east Phuket coast. When one arrives — typically following a brief dry spell — the sheltered reef sites off Ao Chalong and Cape Panwa fish extremely well. Bottom fishing for snapper and grouper, with lure work for trevally and barracuda.
What to Avoid
Avoid all attempts to reach the Similan Islands, Surin Islands, or any outer Andaman offshore destination in September — the sea conditions are dangerous and no reputable operator should be running these routes. Avoid booking non-refundable September inshore charters with operators who don't offer weather-based cancellations — conditions can change from fishable to unfishable in 12 hours. Avoid the western exposed beaches of Phuket, Khao Lak, and Krabi for any shore fishing in September; the swell and undertow at these locations are actively dangerous.
The October Watch Begins
Experienced Andaman anglers spend September's final two weeks with one eye on the seasonal weather services. The southwest monsoon typically begins weakening in mid-October, and the first sign is a shift in swell period and a reduction in the consistency of westerly wind. When you start seeing southwest swell dropping to 1.5 metres with 12-second periods, October's offshore window is imminent. Liveaboard operators begin confirming their first October departures around the last week of September.
Venue Spotlight
Phang Nga Bay (Ao Phang Nga National Park) — The bay's interior network is the Andaman September angler's most reliable destination. The national park's guided kayak operations use experienced local guides who know the productive mangrove channel sections and tidal timings. The combination of spectacular karst scenery, diverse birdlife, and genuine fishing productivity makes this one of Thailand's most distinctive September fishing experiences.
Krabi Inland Fishing Park (Ao Nang area) — A privately managed freshwater venue near Krabi town that offers a reliable September alternative when offshore conditions preclude saltwater options. The park stocks various species including pacu, barramundi, and catfish in attractive lake settings with good facilities. Not a world-class fishing destination but a genuinely useful September fallback.
Ao Chalong Bay, Phuket — The departure point for most eastern Phuket inshore fishing, Ao Chalong's sheltered position means that on the occasional calm September day, full inshore reef trips are achievable. The pier area also offers jetty fishing for barracuda and queenfish. Several local charter operators are based here and can be contacted directly for day-of-weather charter decisions.
Logistics in September
The Andaman coast in September means heavily discounted accommodation — hotels and villas that cost three times as much in February are available for low-season rates, and the popular areas are genuinely quiet. Phuket Airport maintains full international service year-round. The practical fishing logistics challenge is the charter-booking approach: avoid fixed-date, advance-paid inshore bookings and instead arrive and engage with local operators on a day-by-day weather basis. Krabi town is the best base for September's mixed inshore and freshwater program.
Looking Ahead to October
October is the month the Andaman comes back to life. The southwest monsoon typically weakens through October, the first liveaboard trips to the Similan marine park are usually confirmed for mid-to-late October, and the inshore fishing transitions from its September survival mode into genuine offshore accessibility. GT, sailfish, and tuna all become available from mid-October. Plan an October return if September's conditions have frustrated your offshore ambitions.
