Full Moon Mutton Spawn Peaks Across the Florida Keys

What's Biting

What's Next

With today's full moon at peak, the mutton snapper spawn window is open right now and will stay productive for several days. Mutton snappers stack up on the reef to spawn during the days bracketing the full moon, making this a rare stretch when big fish feed aggressively in predictable locations. Per ALL IN Key West, live-bait presentations have been especially effective, and the bite has been strong enough that a banana on board couldn't jinx it.

Winds near 10 mph from NOAA buoys SMKF1 and SANF1 suggest comfortable offshore access this weekend. Full moon cycles drive large tidal swings in the Keys; expect accelerated current along reef edges and channel cuts, which concentrates baitfish and activates feeding windows. Time your drifts to coincide with peak tidal movement for the best snapper and grouper action.

Mahi-Mahi season typically intensifies through June and July, and multiple reports from Coastal Angler Magazine and ALL IN Key West confirm fish are already showing. Watch floating debris lines and color changes pushed by the Gulf Stream. Summer Mahi tend to gather under anything drifting on the surface, and trolling or pitch-casting live baits to debris lines is the reliable approach this time of year.

On the flats, late May and June historically bring permit and tarpon to peak activity. No specific flats intel was reported in this update cycle, but conditions including warm water, settled winds, and light early-morning pressure are textbook for the season. Early outgoing tides on the Gulf flats are the prime window; check local tide charts and plan around the first couple of hours of movement.

Bottom fishing on deep wrecks should remain productive. Coastal Angler Magazine documented an African pompano off Islamorada, and ALL IN Key West noted a rare Caribbean snapper from a 220-foot wreck. Bring enough lead to hold bottom in strong Gulf Stream current when working deep structure.

Context

Late May in the Florida Keys is one of the most celebrated windows on the inshore and offshore calendar. The full moon mutton snapper spawn is the signature event of the season: mature muttons congregate on the reef in predictable numbers, making them accessible to anglers in a way that doesn't happen at other times of year. ALL IN Key West frames May through July as 'absolutely lights out for everything from snappers to groupers, sharks, Mahi, and so many more,' a characterization consistent with historical Keys patterns.

Bud n' Mary's in Islamorada has published reports regularly through the spring without showing specific body content in this update cycle, but the Key West charter activity documented by ALL IN Key West aligns with what captains across the Keys typically describe at this point in the season. The waters are warm; the last available buoy reading from the region (buoy 41114, late April) showed 78°F, and Keys surface temps typically climb another two to three degrees by early June.

The flats and reef fisheries appear seasonally on-schedule. Permit, tarpon, and bonefish are historically strong on the flats through June before summer heat pushes some fish to deeper, cooler water. Offshore, the Gulf Stream runs close to the Keys in late spring, compressing the color change and making Mahi, sailfish, and tuna accessible within a reasonable run. Sailfish were already showing in numbers as early as March per ALL IN Key West, suggesting an active spring offshore season overall. Current conditions, including settled winds, the full moon, and warm water, represent exactly the setup Keys regulars plan their annual trips around.