Onion Key Tide Charts & Fishing
Saturday, August 15 · NOAA station 8724863 (Onion Key, Lostmans River)
Updated 6:45 AM ET
Tide chart and current conditions
Tide now
0.7 ft
· Slack water
Next high
6:02 PM
0.8 ft · in 11h 16m
Next low
1:38 PM
0.1 ft · in 6h 52m
Wind
4 mph NE
Calm
Fishing score
61 /100
Good
drag to pan · scroll or pinch to zoom · hover for detail
| Day | Tide | Time | Height |
|---|---|---|---|
| Sat, Aug 15 | Low | 1:28 AM | 0.1 ft |
| Sat, Aug 15 | High | 5:48 AM | 0.7 ft |
| Sat, Aug 15 | Low | 1:38 PM | 0.1 ft |
| Sat, Aug 15 | High | 6:02 PM | 0.8 ft |
| Sun, Aug 16 | Low | 2:06 AM | 0.1 ft |
| Sun, Aug 16 | High | 6:20 AM | 0.8 ft |
| Sun, Aug 16 | Low | 2:25 PM | 0.1 ft |
| Sun, Aug 16 | High | 6:54 PM | 0.7 ft |
Today's Tide Times in Onion Key
Today in Onion Key, high tide arrives at 5:48 AM (0.7 ft) and again at 6:02 PM (0.8 ft), and low tide bottoms out at 1:28 AM (0.1 ft) and again at 1:38 PM (0.1 ft). That's a 0.8-foot swing — a gentle neap-cycle swing, so focus on dawn and dusk rather than mid-tide current.
The sun rises at 6:57 AM and sets at 8:00 PM, under a waxing crescent (5% illuminated). With the moon near its spring-tide phase, expect stronger-than-average water movement all week.
Tomorrow starts with a low tide at 2:06 AM (0.1 ft) — see the 7-day outlook below to plan the week.
Fishing Score · Now
61/ 100
Best windows today
- 5:30 AM – 7:30 AMGood
- 7:30 PM – 9:30 PMGood
dusk bite window · light wind
Sun & Moon
- Sunrise
- 6:57 AM
- Sunset
- 8:00 PM
Waxing Crescent
5% illuminated
Spring tides — strong water movement. Prime solunar days.
Conditions
78°F
Clear
- Wind
- 4 mph NEgusts 7
- Waves
- 0.4 ft @ 3s
- Water temp
- 90°F
Calm — Glass — perfect for topwater
7-Day Fishing Outlook
Today
90° / 77°
Good
Best: 5:30 AM–7:30 AM
Sun, Aug 16
90° / 75°
Good
Best: 5:30 AM–7:30 AM
Mon, Aug 17
97° / 80°
Good
Best: 4:30 AM–6:30 AM
Tue, Aug 18
94° / 79°
Good
Best: 5:30 AM–7:30 AM
Wed, Aug 19
94° / 78°
Good
Best: 5:30 AM–7:30 AM
Thu, Aug 20
94° / 78°
Good
Best: 5:30 AM–7:30 AM
Fri, Aug 21
99° / 79°
Good
Best: 6:00 AM–8:00 AM
What's Biting at Onion Key
Activity ratings reflect typical feeding seasons — not legal seasons. Regulations, closures, and size/bag limits change; always check current FWC regulations before keeping any fish.
Common Snook
Centropomus undecimalis
Season: March – October (check season closures)
Baits: Live pilchards, Swimbaits, Topwater plugs
Work dock lights, mangrove edges, and passes on moving water. Summer beach snook cruise the first trough at first light.
Tarpon
Megalops atlanticus
Season: April – August migration
Baits: Live crabs, Threadfin herring, Swimbaits
Stake out passes and beaches during the spring migration — hill tides in the Keys are legendary. Bow to the king when it jumps.
Mangrove Snapper
Lutjanus griseus
Season: Year-round, best in summer
Baits: Live shrimp, Pilchards, Cut bait on light leader
Fish structure — docks, bridges, mangrove roots — with the lightest leader you can get away with. They see everything.
Spanish Mackerel
Scomberomorus maculatus
Season: Spring and fall runs
Baits: Silver spoons, Gotcha plugs, Live pilchards
Find birds working bait and cast fast-moving metal through the frenzy. Wire or heavy fluoro — their teeth are scissors.
Florida Pompano
Trachinotus carolinus
Season: Fall – spring surf runs
Baits: Sand fleas, Fresh shrimp, Pompano jigs
Surf fish the troughs on an incoming tide with sand fleas — the Florida winter classic. Look for diving birds over sandbars.
Gear for These Conditions
TheAnglerStore →Matched to the species feeding at Onion Key right now.
Surf Rods
Okuma Tundra Surf Spinning Rod — 7 ft, 2-Piece
Okuma build the Tundra as a surf series and say so themselves — they describe it as favoured by catfish anglers and cost-conscious surf anglers.
$25.95Shop at TheAnglerStore →
Line & Leader
Sufix 832 Advanced Superline Braid — 20 lb, 300 yd
Seven HMPE fibers plus one GORE Performance Fiber, braided at 32 picks per inch. The GORE fiber is what makes this line quiet through the guides and stubborn…
$34.99Shop at TheAnglerStore →
Line & Leader
Sufix Wind-On Fluorocarbon Leader — 50 lb, 11 yd
A braided loop on one end means you connect to your main line without a knot or a swivel, and the leader winds straight through the guides onto the reel.
$15.49Shop at TheAnglerStore →
Soft Baits
Zoom Fluke 4" — Smokin' Shad, 10-Pack
Same darting soft-jerkbait profile in the standard body, in a translucent shad pattern that covers most clear-water situations.
$3.99Shop at TheAnglerStore →
Onion Key Tide & Fishing FAQ
›What time is high tide in Onion Key today?
High tide in Onion Key today is at 5:48 AM (0.7 ft) and again at 6:02 PM (0.8 ft), measured at NOAA station 8724863 (Onion Key, Lostmans River).
›What time is low tide in Onion Key today?
Low tide in Onion Key today is at 1:28 AM (0.1 ft) and again at 1:38 PM (0.1 ft).
›When is the best time to fish in Onion Key today?
Today's best fishing window at Onion Key is 7:30 PM–9:30 PM (rated Good, 64/100), driven by dusk bite window, light wind. The score blends tide movement, dawn/dusk light, moon phase, wind, and water temperature.
›What fish are biting in Onion Key in August?
In August, the most active species at Onion Key are Common Snook, Tarpon, Mangrove Snapper. See the species section above for baits, techniques, and seasons.
›How accurate is this Onion Key tide chart?
Predictions come directly from NOAA CO-OPS harmonic predictions for station 8724863 (Onion Key, Lostmans River) and are the same data used in official tide tables. Actual water levels can vary with storms and barometric pressure, so treat predictions as planning guidance, not navigation data.
About Onion Key
Onion Key is one of the Atlantic Coast tide stations in NOAA's official prediction network. The chart above shows the live prediction for station 8724863 (Onion Key, Lostmans River) — the same harmonic data printed in official tide tables — paired with local weather, water conditions, and our fishing score so you can time a session here without cross-referencing three sites.