Thomas Basin is a small, working harbor where locals fish for halibut and rockfish year-round

Thomas Basin sits in downtown Ketchikan, a few blocks from the cruise ship docks, and it is one of the few saltwater fisheries you can reach on foot in Southeast Alaska. The basin itself is a protected anchorage where commercial fishing boats tie up, but the surrounding docks and breakwater are open to anglers. You will be fishing in a harbor full of working vessels, not a dedicated recreation area — expect to share space with fishermen heading out at dawn and boats unloading their catch.

The water here is cold and deep, and the tidal current runs hard. Halibut hold on the sandy bottom in 40 to 80 feet of water just outside the basin proper, and rockfish — mostly black and yellow rockfish — live on the rocky structure closer to shore. The fishing is genuine, not a tourist attraction, and the species and seasons are the same ones that support the commercial fleet.

Access is free, but you will need your own gear and a way to get a boat into the water. There is no charter fleet based at Thomas Basin itself, and no rental boats. If you want to fish here, you either bring your own skiff or hire a guide who operates out of Ketchikan and knows the basin.

Key Takeaways

  • Thomas Basin is a working harbor in downtown Ketchikan where you can fish for halibut and rockfish from the docks or by boat, but you must bring your own gear or hire a guide.
  • Halibut fishing is best in summer and early fall, with fish holding in 40 to 80 feet of water just outside the basin; rockfish are available year-round in shallower water near rocky structure.
  • Tidal current in the basin runs hard and changes direction every six hours, so timing your fishing to slack water or the incoming tide makes a real difference in success.
  • The basin is a commercial fishing port, so you will be sharing docks with working boats; plan to fish early morning or late afternoon when commercial activity is lighter.

Halibut fishing from summer through early fall

Halibut move into the shallower water around Ketchikan from June through September, and Thomas Basin is close enough to productive grounds that you can reach them in a short run. The fish hold on sand and gravel bottom in 40 to 80 feet of water, and they respond to live herring or squid jigged on the bottom. A 2- to 4-pound jig works in most conditions, but you will need heavier tackle if the current is running hard — and it usually is.

The best fishing happens on the incoming tide or during slack water, when your jig stays on bottom longer and you can feel bites more clearly. The outgoing tide pushes hard and makes it difficult to hold bottom without going to 6 or 8 pounds of lead. Most anglers fish the two hours before slack water and the two hours after, then move or wait for the next cycle.

Halibut bite throughout the day, but early morning and the last two hours before dark are most reliable. Fish a jig with a steady lift-and-drop motion, and set the hook hard when you feel weight — halibut often grab a jig and hold on rather than striking aggressively.

Rockfish year-round in shallow water and rocky areas

Black and yellow rockfish live in the rocky structure around the basin entrance and on the breakwater, and they are present every month of the year. They are smaller than halibut — most fish run 1 to 3 pounds — but they bite consistently and are good eating. You can fish for them from the docks using light jigs, small shrimp, or cut bait, or by boat in slightly deeper rocky areas nearby.

Rockfish are not picky about tide or time of day the way halibut are. They bite on the incoming tide, the outgoing tide, and slack water. A 1/2-ounce jig tipped with a small piece of squid or shrimp will catch them, and you do not need to fish deep — 20 to 40 feet is typical. The bite is usually steady enough that you can spend an afternoon and catch a box of fish.

Winter rockfish fishing is often better than summer because the water is clearer and the fish are more concentrated. Spring and fall are also productive, and summer is the slowest season — not because the fish leave, but because the water warms and visibility drops.

Tides and current make timing critical

Thomas Basin sits at the mouth of Ketchikan Creek, and the tidal current here is one of the strongest in Southeast Alaska. The water changes direction every six hours, and during the peak of the incoming or outgoing tide, the current can run 3 to 4 knots. That speed makes it nearly impossible to fish bottom effectively without very heavy jigs, and even then you will spend more time fighting current than fishing.

Slack water — the 20 to 40 minutes when the current stops before reversing — is when most anglers fish. During slack, your jig stays on bottom, you can feel bites, and you can work a smaller, lighter jig. The incoming tide is usually easier to fish than the outgoing tide because the current builds more gradually.

Check the tide tables for Ketchikan before you fish. The timing changes every day, and planning your trip around slack water or the first hour of the incoming tide will double your success. Many local guides and charter captains plan their entire day around the tide schedule.

Dock fishing and boat access

You can fish from the docks at Thomas Basin without a boat, though your options are limited. The docks are narrow and crowded with mooring lines and working gear, and the best fishing is in deeper water just outside the basin. Dock fishing works for rockfish and small halibut, but you will not reach the deeper halibut grounds that hold the larger fish.

If you bring a boat, you can launch at nearby ramps in Ketchikan and run into the basin in a few minutes. The basin itself is protected and calm, but the water just outside can be rough if the wind is up — Southeast Alaska weather changes fast, and a calm morning can turn choppy by afternoon. Most anglers fish within a mile of the basin entrance and return to shelter if conditions deteriorate.

A 16- to 20-foot skiff with a 40 to 60-horsepower outboard is typical for this fishery. You do not need a large boat, but you do need one that handles the tidal current and can get you back to shelter quickly if the weather turns.

Regulations and seasons

Halibut and rockfish in Southeast Alaska are managed by the Alaska Department of Fish and Game, and the rules change by area and season. Halibut has a daily bag limit and a possession limit, and the season usually runs from spring through fall, though exact dates vary by year. Rockfish also has a daily bag limit, and the season is usually year-round.

You will need a valid Alaska fishing license, which you can purchase online or at any sporting goods store in Ketchikan. Nonresident licenses are available for a day, a week, or a year. Check the current regulations before you fish — the Alaska Department of Fish and Game website has the most current information, and the staff at local tackle shops can tell you what is open and what the limits are.

Catch-and-release fishing is allowed, and many anglers practice it for rockfish to keep the bite going. Halibut are usually kept because they are excellent eating and the meat is valuable.

Gear and tackle for Thomas Basin

Halibut fishing requires a medium-heavy jigging rod, a conventional reel with at least 200 yards of line, and jigs in the 2- to 8-pound range depending on tide and depth. A 6-foot rod is standard, and a reel that holds 300 yards of 30-pound braid is ideal. Bring multiple jigs because you will lose some to the rocky bottom.

Rockfish tackle is lighter — a medium spinning rod, 15- to 20-pound line, and 1/2- to 1-ounce jigs. You can use the same rod for both species if you are switching between halibut and rockfish fishing, but dedicated halibut tackle will be more effective.

Bring a gaff or net for landing fish from a boat, a fillet knife for processing your catch, and a cooler with ice. The water is cold year-round, so dress in layers and bring rain gear — Southeast Alaska weather is wet and unpredictable, and you can go from calm to rough in an hour.

Frequently Asked Questions

Can I fish Thomas Basin without a boat?

Yes, you can fish from the docks for rockfish and small halibut, but your options are limited. The best halibut fishing is in deeper water outside the basin, which requires a boat. Dock fishing works if you want to catch rockfish or spend an afternoon without the expense of a charter or boat rental.

What is the best time of year to fish Thomas Basin?

Summer and early fall (June through September) are best for halibut because the fish move into shallower water. Rockfish bite year-round, but winter and spring often have clearer water and more consistent bites. Fall is productive for both species before the weather deteriorates.

Do I need a guide to fish Thomas Basin?

No, but a guide is helpful if you are unfamiliar with the tides, the bottom structure, or the current. Local guides know the best spots, the timing, and how to read the water. If you have your own boat and experience fishing tidal basins, you can fish on your own.

What should I do if the current is too strong to fish?

Wait for slack water, which occurs for 20 to 40 minutes every six hours. If slack water is not convenient, fish the first hour of the incoming tide when the current is building but not yet at peak speed. Avoid the peak of the outgoing tide unless you have very heavy jigs and experience with strong current.

Where can I buy tackle and licenses in Ketchikan?

Several tackle shops in downtown Ketchikan sell fishing licenses, jigs, line, and other gear. Local shops can also tell you what is biting, what the regulations are, and where other anglers are fishing. Ask at your hotel or the visitor center for the nearest shop.