Best Time of Year to Catch King Mackerel and Mahi Near North Myrtle Beach

King mackerel fishing draws anglers to North Myrtle Beach from across the Southeast, and for good reason. These streamlined predators arrive each spring, peak in the fall, and put up some of the hardest fights that nearshore waters along the Grand Strand have to offer. If you landed here while comparing king mackerel against Spanish mackerel, or you’re simply trying to pin down the best time to book a trip, you’re in the right spot. Below, we break down identification, season, tackle, taste, and everything else you need, so you never have to search for a second source.

What Is King Mackerel? A Quick Species Primer

King mackerel (Scomberomorus cavalla) is a large, fast-swimming member of the mackerel family found throughout the western Atlantic, from the mid-Atlantic states down through the Gulf of Mexico and the Caribbean. You can read more about its classification and range on Wikipedia’s overview of king mackerel. Locally, anglers simply call them “kings,” and the name fits — these fish are built like torpedoes, with long, silver bodies designed for sudden bursts of speed.

Unlike reef fish that sit tight to structure, king mackerel are true pelagic predators. They roam open water chasing bait, then converge on wrecks, ledges, and artificial reefs when conditions concentrate forage in one place. Because of that behavior, understanding where and when king mackerel show up matters just as much as having the right tackle in hand.

King Mackerel vs. Spanish Mackerel: What Really Sets Them Apart

This is the question that brings most anglers to this page, and it deserves a straight answer. King mackerel and Spanish mackerel look similar at a glance — both are silver, torpedo-shaped, and toothy — but they differ in nearly every way that matters to an angler. For a deeper look at the smaller species specifically, see our dedicated guide to Spanish mackerel fishing near Myrtle Beach. Below, we break the comparison into the categories that actually affect how, where, and when you catch each fish.

Size and Weight: How Big Do Kings Get?

Size is the single biggest giveaway. Spanish mackerel rarely exceed 5 pounds, while king mackerel routinely weigh 20 to 30 pounds, with trophy fish — often nicknamed “smoker kings” — topping 40 pounds. According to NOAA Fisheries’ king mackerel species profile, the IGFA all-tackle world record sits at 93 pounds. In other words, if you boat anything over 10 pounds, you’re almost certainly looking at a king, not a Spanish.

Coloration, Lateral Line, and Other Visual Clues

• Spanish mackerel show bright yellow-gold spots scattered along their flanks, and their lateral line runs in a gentle, gradual curve from head to tail.
• King mackerel lack those spots almost entirely once mature, and their lateral line dips abruptly downward just below the second dorsal fin — a feature unique to the species.
• The first dorsal fin on a king mackerel is solid black at the front edge in juveniles, while the Spanish mackerel’s first dorsal fin is uniformly dark without that same contrast.

Teeth, Bite Force, and Why It Matters on the Line

Both species carry a row of flat, triangular, razor-sharp teeth, however king mackerel teeth are noticeably larger and their jaws deliver far more bite force. Consequently, wire leader isn’t optional when targeting kings — monofilament simply doesn’t survive the encounter. Spanish mackerel can occasionally be landed on light fluorocarbon, but even experienced anglers lose plenty of fish to bite-offs without a short wire bite tippet.

Taste Test: Which Mackerel Tastes Better?

Spanish mackerel has a milder, more delicate flavor and smaller flake, which makes it popular grilled or pan-seared the same day it’s caught. King mackerel, in contrast, has firmer, oilier flesh that holds up beautifully to smoking — in fact, smoked king mackerel dip is a Southern coastal staple. Neither is objectively “better”; it comes down to preparation and preference, though we’ll cover mercury considerations for larger kings later in this guide.

Habitat and Range: Where Each Species Roams

Spanish mackerel favor shallow, inshore-adjacent water and tend to stay within a few miles of the beach, often mixing with schools of whiting and other baitfish along the surf line. King mackerel, on the other hand, range more widely and sit deeper around nearshore and mid-range structure. You can compare the two species’ migratory patterns directly through NOAA’s Spanish mackerel profile.

King Mackerel Season Near North Myrtle Beach

Neither king mackerel nor Spanish mackerel are year-round residents off the Grand Strand. Both follow water temperature and bait, and the Gulf Stream — running roughly 60 to 70 miles offshore — acts as the engine driving that migration. As a result, understanding the seasonal pattern is the single most useful thing you can do before booking a trip.

Spring: The First Push of Kings

As water temperatures climb into the upper 60s through April and May, king mackerel begin their northward migration along the coast. Nearshore reefs, wrecks, and ledges concentrate bait, and that bait pulls in the first solid numbers of kings. For anglers who want action without a long offshore run, the spring push is one of the most accessible windows of the year.

Summer: Steady Nearshore Action

Through June, July, and into August, king mackerel fishing stays dependable around nearshore structure anywhere from a few miles out to 20 or 30 miles. Weather windows are more predictable in summer, too, which is why so many families book their first king mackerel trip during these months.

Fall: Peak King Mackerel Fishing

Ask any experienced Grand Strand captain, and fall will almost always be their answer. September through November brings the southward migration, and that push can stack fish in numbers that make spring look like a warm-up act. October, in particular, has a well-earned reputation for producing some of the best king mackerel fishing of the entire year along the South Carolina coast.

Winter: When the Bite Shuts Down

By late November and into December, cooling water pushes most kings south or deeper, and the nearshore bite tapers off. That said, warmer winters can stretch the tail end of the fall run further into December, which is exactly why local, year-round experience matters more than any fixed calendar date.

Local knowledge matters more than any calendar. Water temperatures, current positions, and bait concentrations shift from year to year. A captain who fishes these waters 365 days a year reads those conditions in real time — and adjusts accordingly.

Where King Mackerel Live and Feed Offshore

King mackerel key in on structure that concentrates baitfish — artificial reefs, natural rock ledges, and shipwrecks scattered from a few miles off the beach out to 20 or 30 miles. Unlike mahi-mahi, which live almost exclusively in open blue water, kings will happily hold over structure in relatively shallow depths, which is part of what makes them such an accessible target for charter trips. For anglers chasing a true offshore bucket-list species on the same trip, our offshore Gulf Stream charters can run further out to reach both king mackerel grounds and blue-water species in the same day.

Bait position drives king mackerel location more than almost any other factor. Specifically, look for diving birds, nervous bait on the surface, or dense arcs on sonar sitting just above structure — that’s where kings will be staged, waiting to ambush.

How to Catch King Mackerel: Gear, Bait, and Technique

Catching king mackerel consistently comes down to four repeatable steps. Follow this process and you’ll put far more kings in the box than by blind trolling random water.

1. Locate active bait and structure. Idle around nearshore reefs, wrecks, and ledges while watching your depth finder for bait pods and arcs, since king mackerel rarely stray far from concentrated bait.
2. Rig a lively bait or flashy spoon. Pin a live menhaden or cigar minnow through the nose on a wire stinger rig, or clip on a trolling spoon, because kings strike best at fast-moving or erratic targets.
3. Set your spread at the right depth and speed. Stagger baits at varying depths using planers or downriggers and troll between four and six knots to cover the water column where kings are feeding.
4. Hook the fish and clear the drag properly. Let the rod load fully before setting the hook, then keep steady pressure while clearing other lines, since king mackerel make blistering initial runs that can snap light drags.

Best Bait and Rigs for Smoker Kings

Live menhaden, cigar minnows, and blue runners consistently outproduce dead bait for king mackerel, particularly when fished on a two-hook stinger rig with number 4 or 6 treble hooks and 40- to 60-pound wire leader. In addition, dead cigar minnows rigged on a single hook and trolled behind a planer catch plenty of fish when live bait isn’t available, so don’t let a slow bait well end your trip early.

Trolling Speed, Depth, and Strike Zones

Most strikes happen within 15 to 40 feet of the surface around structure, though kings will occasionally come up to hit baits skipping right on top. Therefore, running a spread with baits at multiple depths — some on planers, some flat-lined near the surface — covers more of the strike zone than committing to a single depth all day.

How Big Do King Mackerel Get? Records and Realistic Expectations

A typical king mackerel caught off North Myrtle Beach weighs between 10 and 25 pounds, with fish in the 20- to 30-pound range being a common, satisfying target. Above all, anything over 30 pounds earns real bragging rights, and the true giants — the 40-plus pound “smoker kings” tournament anglers chase — represent a small percentage of the population. As noted earlier, the IGFA all-tackle world record stands at 93 pounds, giving you a sense of just how much growth potential this species has compared to the much smaller Spanish mackerel.

Is King Mackerel Good to Eat? Taste, Texture, and Mercury Concerns

King mackerel has firm, flavorful, moderately oily flesh that holds up exceptionally well to smoking, grilling, and blackening. Many coastal families consider smoked king mackerel dip a signature dish, and for good reason — the texture and flavor are hard to beat. That said, because larger, older king mackerel can accumulate higher mercury levels than smaller fish, the FDA’s seafood mercury guidance recommends limiting portions of large king mackerel, particularly for pregnant women and young children. In practice, this means favoring smaller, younger kings for the table and treating true trophy fish as catch-and-release or photo opportunities.

Mahi-Mahi: The Grand Strand’s Other Offshore Favorite

If king mackerel is on your list, there’s a good chance mahi-mahi fishing near Myrtle Beach is too. Unlike kings, mahi are almost exclusively an open-water species, found along weed lines, floating debris, and temperature breaks out near the Gulf Stream. Their season generally runs May through September, peaking in June and July, and they prefer water in the mid-70s and above.

In short, if you’re planning a multi-species offshore trip, early summer gives you the best overlap — solid king mackerel action nearshore combined with a real shot at mahi further out.

Why Fish King Mackerel With a Private Charter

When your trip is built around your group — not a mixed boat of strangers — your captain can fish the conditions as they actually are that day. If kings are stacked on a specific wreck, you go there; if the bite is best at a nearby ledge instead, the plan adapts instantly. Locally owned and operated since 1991, our captains have watched king mackerel runs come and go for decades. They know which reefs hold fish in spring, which wrecks produce in fall, and how to read the water for both kings and mahi when conditions line up.

Frequently Asked Questions About King Mackerel

Final Cast: Your King Mackerel Game Plan

There’s no single “perfect” day that guarantees a full box of king mackerel — the fish are wild, the ocean changes, and any captain who promises otherwise isn’t being straight with you. What you can count on is a well-defined seasonal window, a clear understanding of how king mackerel differ from Spanish mackerel, and a trip built around your group’s experience rather than a mixed-boat schedule. If king mackerel is the goal, plan for spring through fall, with October standing out as the best of the best. Book your trip, bring a camera, and let an experienced local captain put you on the fish.