August 2025 — Jacksonville: Flounder Still Strong, Last Month Before Snook Reopens. August is a late summer month with water in the 82–86°F range — water at peak temperatures; fish low and slow midday; afternoon storms common. Here’s the full breakdown of what’s biting, where to fish, and the most productive tactics for this month.
What’s Biting — August 2025
Primary targets this month: Flounder, Redfish, Snapper.
Flounder
Flounder are around Mayport jetties, the rock piles inside the St. Johns River mouth, the train trestle, and Sisters Creek. Bucktails with Gulp! trailers, live mud minnows, and finger mullet on Carolina rigs produce. Work baits slow on the bottom.
Redfish
Summer redfish are in the marshes of Pumpkin Hill Creek, Sisters Creek, Browns Creek, Cedar Point flats, and the docks of Black Hammock Island. Fish dawn and dusk hard — once the sun gets high and water hits 85°F+, bites slow significantly. Live pinfish, cut ladyfish, and topwater walking baits at first light are top producers. Tailing fish on grass flats around the new and full moons.
Snapper
Red snapper season is open in federal Gulf waters (private rec season — verify FWC and NOAA dates each year). Target the Elton Bottom, the Hangover, MR Reef, and 21-Fathom Reef at 60–90 feet. Drop cut squid, cigar minnows, threadfin herring, and live pinfish on 4–8 oz egg sinker rigs with 60–80 lb fluorocarbon leader and 7/0–10/0 circle hooks. Limit is two per angler at 16″ — verify current rules at FWC.
Water Conditions & Patterns
Water temperatures are running 82–86°F. Water at peak temperatures; fish low and slow midday; afternoon storms common. Falling tides through the Mayport jetties create the best bite windows; sheepshead and redfish position behind structure where current breaks. Two hours before to two hours after low tide is prime.
Check the NOAA marine forecast and tide charts before launching. Wind direction matters more than wind speed for inshore fishing — east winds tend to push clean water in, while strong westerlies can muddy the bays.
Tactics & Tackle for This Month
- Early and late. The 5 AM to 9 AM window and 6 PM to dark are gold; midday water temps push fish deep or into shade.
- Live bait season. Cast-net pilchards, scaled sardines, and threadfins for snook, tarpon, and snapper. Chum with a few live ones to start a feed.
- Storm awareness. Afternoon thunderstorms develop fast — check radar before and during trips. Get off the water at the first thunder.
August Outlook
The dog days — fish low light, deep water, or shaded structure. Tarpon still around but less reliable. Watch for first signs of fall bait movement late in the month.
Regulations Reminder
Redfish: 18–27″ slot, one per angler per day (verify current FWC zone-specific rules). Flounder: 14″ minimum, five per day (Florida). Red Snapper: 16″ minimum, two per day during federal season (Gulf). Verify with NOAA/FWC each year. Mangrove snapper: 10″, five per day. Always verify the current FWC regulations at myfwc.com before your trip — sizes, bag limits, and season dates change.
Local Resources
Bait & Tackle: B&M Bait & Tackle (Mayport, 904-246-6969); Strike-Zone Fishing (Jacksonville, 904-641-2433); Fishin’ Hole (Atlantic Beach, 904-757-7550).
Public Boat Ramps: Mayport (free, fast access to jetties), Sisters Creek (deep-water access to north river), Goodbys Creek (south side ICW), Wayne B. Stevens (Heckscher Drive).
Charter Fishing: $400–$650 inshore (Mayport, St. Johns); $750–$1,400 offshore (Elton Bottom, Hangover). Book ahead during cobia migration (March–April), red snapper opener (June), and the fall run (October–November).
More Jacksonville Resources
Jacksonville Fishing Guide · Jacksonville Seasonal Calendar · All Jacksonville reports →
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