Blue marlin and ahi in play as Hawaii enters prime offshore season

What's Biting

What's Next

The buoy network shows a consistent offshore picture through mid-week: surface temps of 75–79°F and northeast trades running 15–17 knots across the chain (NOAA buoys 51001, 51002, and 51004). The Hawaiian High typically stabilizes trade-wind patterns through May, so a dramatic shift in sea state is unlikely over the next two to three days. Plan on similar 7–8-foot swells, with offshore access best on the protected western and southern lees of each island.

The waxing crescent moon is building toward first quarter, which tends to compress the most productive bite windows to the early-morning hours. Many experienced Hawaii offshore anglers target the pre-dawn period through the first two hours after sunrise, running toward temperature breaks and current edges where baitfish concentrate. Sub-surface trolling spreads remain the standard approach: Saltwater Sportsman notes that skirted lures paired with weighted flat lines — fished off bent-butt rods to keep flat lines parallel to the surface — have produced mahi exceeding 40 pounds and wahoo over 66 pounds in open-ocean applications. That setup translates directly to Hawaii's offshore canyon edges and blue-water current seams.

The 79°F pocket east of the Big Island (buoy 51004) is the warmest water in the current dataset, making it a logical trolling target for ahi and mahi concentrated along temperature edges. Blue marlin are worth running on any deep-water current seam or canyon edge — activity typically builds as summer progresses, so offshore effort now is the run-up to a peak season that historically runs July through September.

For inshore or shore-based anglers, the 7–8-foot north swell will limit options on exposed north-facing shorelines through the weekend. Protected western and south-facing points offer the better shot at reef species — papio, ulua, and assorted bottom fish — particularly during morning incoming-tide windows.

Weekend outlook: if trades hold near current intensity, Saturday and Sunday should offer reasonable offshore windows off the western lees. Always confirm with a local marine weather service before committing to an open-ocean run — buoy readings reflect deep-water conditions, not nearshore chop or localized swell wrap.

Context

Late May sits squarely in the ramp-up to Hawaii's premier offshore season. Water temperatures in the 75–79°F range — as measured by buoys 51001 and 51004 — are consistent with typical averages for this time of year; the islands generally see surface temps climb from the low-to-mid 70s in winter toward the upper 70s and low 80s by peak summer. Nothing in the current buoy data suggests the 2026 season is running early, late, or anomalous — it reads as on-schedule.

Blue marlin is the signature quarry of Hawaiian offshore fishing, and historically the season builds through May before peaking from July through September, with the Kona Coast widely recognized as the center of the Pacific blue marlin fishery. Hawaii Fishing News serves as the state's official record repository for these catches, and its archive reflects the predictable summer arc that defines Hawaii offshore fishing year after year. Nothing in this cycle's feeds suggests 2026 is breaking from that rhythm.

The current waxing crescent will reach first quarter in a few days. The new-moon-to-first-quarter window is generally viewed in Hawaiian pelagic fishing circles as favorable for daytime offshore bite activity, so the timing heading into the coming week is reasonable for putting in offshore hours.

One gap worth flagging honestly: HI Sea Grant's current published content is focused on marine policy, conservation research, and fellowship programming — not near-term angler conditions. For the sharpest ground-truth on what's actively in the spread, checking in with charter docks on the Kona Coast or referencing Hawaii Fishing News' current lunar and tidal calendar will provide a more precise picture than buoy data alone can offer this cycle.