Mutton Snapper Spawn Peaks as the Keys Summer Run Takes Shape

What's Biting

What's Next

The immediate outlook for the Florida Keys is excellent. The full-moon window — which ALL IN Key West credits for the current mutton snapper surge — typically sustains spawning aggregations for 7–10 days beyond the lunar peak. With the Waning Crescent phase now underway on May 12, the aggregations should remain accessible through at least mid-week, making the next several days a prime window before fish begin to disperse back to resident structure. Target depth is 60–200 feet along the outer reef, where mutton snapper concentrate on hard-bottom and coral to spawn. Live bait and cut chum on a drift is the historically proven approach, and ALL IN Key West confirms it's working now.

Winds from SMKF1 and SANF1 are both running under 6 knots this morning — near ideal for backcountry flats work and manageable for offshore runs. While the wave-height data from buoy 41114 (2.3 ft, recorded April 26) is no longer current, the present wind readings suggest nearshore seas are likely in the 1–2 foot range. If the light-wind pattern holds through the weekend, expect strong participation across both the flats and the offshore grounds.

Offshore, Gulfstream proximity — which ALL IN Key West noted as a driver of early-season sailfish action — will continue to benefit the mahi-mahi bite as baitfish and weed lines press toward accessible ranges. May and June are historically the top months for schoolie-to-bull-size dolphin in the Keys; running offshore color lines with live bait or rigged ballyhoo should produce as the Gulfstream holds position. The Gulf of America side continues to deliver for grouper and cobia per recent ALL IN Key West reports.

Looking ahead to May 22, anglers on the Atlantic side should note that the 2026 expanded Florida Atlantic red snapper season opens that date and runs through June 20 — a 39-day season, the longest since 2010, following NOAA approval of a state-led exempted fishing permit (per Coastal Angler Magazine and CCA Florida). The bag limit is one fish per person per day; confirm current Florida regulations before targeting snapper, as Atlantic and Gulf-side management remain separate.

On the flats, the waning crescent phase and warming water create reliable morning movement for permit, bonefish, and tarpon. Incoming tides that push water over grass flats are the prime window; fish will be chasing crabs and shrimp as water climbs through midday.

Context

May is the Florida Keys' transition month from spring to summer, and the current reports align closely with what experienced captains expect at this point in the season. The mutton snapper spawn is one of the most reliable and eagerly anticipated annual events in the Keys calendar. Mutton snapper aggregate along the reef edge — typically in 100–200 feet — around each full moon from May through August, with the May and June moons historically drawing the largest concentrations. The ALL IN Key West report confirms this pattern is playing out right on schedule in 2026.

Yellowtail snapper fishing is similarly characteristic of this time of year; their year-round availability on the Keys reef means strong chumming bites are the rule, not the exception, through the summer months. The 'lights out' description from ALL IN Key West is a May baseline, not an anomaly.

The Gulfstream proximity that ALL IN Key West flagged as strong enough to require extra lead weight on bottom rigs is seasonally normal for late spring; those same currents bring warm, blue offshore water within accessible range and are responsible for the sailfish action reported as 'kicking off early' back in March. By mid-May, sailfish would be considered in their standard seasonal window regardless, suggesting the 2026 pelagic season has been at or slightly ahead of pace.

The most recent buoy water-temp reading — 78°F at buoy 41114 on April 26 — would sit slightly below the Keys' mid-May historical average of roughly 80–82°F, though the reading's age of more than two weeks means current temps are almost certainly higher. Historically, once Keys waters cross 80°F, the summer bite for snapper, grouper, and pelagics shifts into high gear. By all available accounts from on-the-water sources, that transition is already well underway heading into the third week of May.