December 2025 — Florida Keys: Peak Sailfish Season, Winter Flats Conditions, Holiday Fishing. December is a early winter month with water in the 56-64°F range — sheepshead returning to structure; pattern shifts to winter. Here’s the full breakdown of what’s biting, where to fish, and the most productive tactics.
What’s Biting — December 2025
Primary targets this month: Sailfish, Tarpon, Grouper, Snapper.
Sailfish
Peak sailfish season on the reef edge 4-8 miles off Islamorada, the Marathon Hump, Wood’s Wall off Key West, and the Tennessee Reef. Live bait (goggle-eyes, threadfins) on kites or slow-trolled. North current with falling barometer triggers the best bites. The Stuart-Palm Beach-Fort Lauderdale corridor is the East Coast sailfish capital.
Tarpon
Tarpon mostly absent — a few resident fish in deeper backwater rivers and warm-water outflows (canals, power plants).
Grouper
Grouper on the deep reef in 80-180 feet — goliath, gag, red, and black grouper around offshore wrecks and ledges. Live pinfish, large cut sardines, or jigs on 50-80 lb tackle. Federal Gulf season for gag and red grouper varies — verify NOAA/FWC dates. Goliath grouper catch-and-release only.
Snapper
Snapper bottom fishing on the patch reefs and bridge pilings — yellowtail, mangrove, mutton, lane, and red snapper at different depths — vermilion, lane, and mangrove snapper open year-round in most areas. Lighter tackle (20-30 lb), 3/0-5/0 hooks, cut squid or live shrimp.
Water Conditions & Patterns
Water temperatures are running 56-64°F. Sheepshead returning to structure; pattern shifts to winter. Bridge fishing in the Keys is driven entirely by current; slack water is dead. Outgoing tide through the channels is the prime tarpon window.
Check the NOAA marine forecast and tide charts before launching. Wind direction often matters more than wind speed for inshore fishing — clean water beats churned water nine times out of ten.
Tactics & Tackle for This Month
- Slow it down. Cold water means cold fish — work jigs, soft plastics, and live bait with patience. Bites are subtle.
- Fish the warmest water. Dark-bottom flats, deeper canals, and creek mouths warm fastest. Afternoons usually outproduce mornings in winter.
- Light fluorocarbon leader. 15-20 lb plenty for inshore — winter water is clear and fish are line-shy.
December Outlook
Winter patterns establishing — sheepshead, tautog, cold-water specialists take over.
Regulations Reminder
Red Snapper: federal season; verify NOAA/state dates. Mangrove snapper: 10″, 5 per day. Tarpon: Catch-and-release only — tarpon over 40″ must remain in water. Always verify current state regulations before each trip — slots, bag limits, and seasons change.
Local Resources
Bait & Tackle: World Wide Sportsman (Islamorada, 305-664-4615); Bass Pro Shops Outdoor World (Islamorada); Sea Boots Outfitters (Big Pine).
Public Boat Ramps: Founders Park (Islamorada), Whale Harbor (Islamorada), Marathon city ramps, Big Pine Key, Geiger Key, Key West (Garrison Bight, Stock Island).
Charter Fishing: $500-$900 flats (bonefish/permit/tarpon); $1,000-$1,800 offshore; backcountry skiffs $550-$800.
More Florida Keys Resources
Florida Keys Fishing Guide · Florida Keys Seasonal Calendar · All Florida Keys reports →
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