May Mutton Snapper Spawn Peaks in the Keys; Yellowtail and Offshore Bite Hot

What's Biting

What's Next

With the moon now in Last Quarter — roughly six days past the full moon that triggered the mutton snapper spawning aggregations — the bottom-fishing bite should remain elevated through the coming weekend. Spawning concentrations typically disperse gradually over the two weeks following the full moon, so anglers still have a solid window before fish scatter back across the reef system. Targeting the aggregations on an early incoming tide, with cut bait or large pilchards on lighter bottom rigs, will be the most reliable approach. ALL IN Key West notes that May, June, and July are 'absolutely lights out' for snappers, groupers, sharks, and mahi-mahi — suggesting the favorable pattern has legs well beyond this week.

Winds measured at NOAA buoys SMKF1 and SANF1 were running around 11 mph on May 10, suggesting manageable conditions for both inshore skiff fishing and reef or offshore runs. The latest offshore wave readings, from buoy 41114 in late April, showed seas near 2.3 feet — expect similar conditions as late-season frontal passages remain possible through mid-May; check local forecasts before committing to longer offshore runs.

On the offshore front, the mahi-mahi and kingfish bite that ALL IN Key West documented on the Gulf side should hold as long as warm blue water pushes close to the reef line. Trolling live or dead baits along color changes, or pitch-baiting to fish spotted near floating weedlines, will be the most productive strategies. Sailfish remain in the mix — ALL IN Key West noted a strong early push beginning as far back as March, which typically means sustained action through May as the season progresses.

Tarpon on the flats are entering their peak window. Historically the Keys see the heaviest concentrations of migratory tarpon from May through mid-June, with fish stacking in channel edges, under bridges, and along oceanside flats on incoming tides. Morning calm periods offer the clearest presentation opportunities for sight-fishing.

One significant regulatory opportunity opens shortly: Florida's Atlantic red snapper season, expanded to 39 days under a state exempted fishing permit (May 22–June 20, plus October weekends), is the longest access since 2010, per Coastal Angler Magazine. For Keys anglers running the Atlantic side, this adds a strong secondary target for offshore structure trips. Check current state regulations for bag limits and area restrictions before heading out.

Context

Mid-May is among the most celebrated fishing windows in the Florida Keys, and the 2026 season appears to be tracking on or ahead of schedule. The mutton snapper spawning aggregation is an annual event tied directly to lunar cycles: fish concentrate on patch reefs and offshore structure during and after the full moon from May through July, with May's aggregation historically the most intense. The bite ALL IN Key West is describing — 'mutton snappers chewing like crazy' and yellowtail 'practically jumping in the boat' — aligns precisely with what longtime Keys captains expect at this phase of the season.

Water temperatures near 78°F, per NOAA buoy 41114 in late April, fall within the expected range for this period. The Keys typically see surface temps climb from the upper 70s in April to the low-to-mid 80s by midsummer, supporting a sustained warm-water species season across the board — snappers and groupers active on structure, mahi and kingfish pulling close to the reef, and tarpon thickening on the flats.

The regulatory landscape also provides notable historical context. Florida's Atlantic red snapper season has been severely curtailed in recent years — just two days in 2025 — making the 2026 expansion to 39 days a meaningful milestone. Both Saltwater Sportsman and Coastal Angler Magazine covered the exempted fishing permit approval in depth, with CCA Florida having advocated for state-led management to improve recreational data collection and angler access. The expanded season reflects years of advocacy and pilot-program preparation, and it reopens Atlantic reef access that Keys anglers have not enjoyed at this scale in over a decade.

Overall, no anomalous environmental signals appear in the current data. The bite is aligning with historical expectations for this phase of the season, and the combination of snapper spawning aggregations, active offshore pelagics, and peak tarpon movement makes this one of the stronger May setups the Keys has seen in recent memory.