On This Water

Florida · Middle Keys / Marathon

Permit should be the day — wait for the next push under the bridges.

Vaca Key gauge. Oceanside wrecks and patch reefs, bayside basins, Seven Mile Bridge current. Permit and tarpon more than bones.

  • This brief is for 2027-03-23. No wind forecast that far out — score is tide, moon, and season. Not a copper day.
  • FKNMS no-take water in this box: Sombrero Key, Coffins Patch. The red polygons are the legal source — do not fish them.
  • Tide · NOAA 8723970
  • NDBC SMKF1 quiet
  • Red-tide check failed — not all-clear
  • Sargassum check failed — not all-clear
  • Water temp quiet
7.9OF 10

Tide + moon

low confidence

Forecast brief for Tuesday, March 23. Back to this morning

Morning line

Marathon 7.9 on Tuesday, March 23 — tide, moon, and season only. No wind forecast that far out. YOLO day is Friday, August 28. Scores are 1–10, not a bite.

Mail it
-0.7-0.30.10.51.0LHLHLHLHMon 8 PMTue 8 PMWed 8 PMThu 8 PMFri 8 PM
high slack · 0.22 ft · drag or hover for the clockNOAA tide gauge 8723970 · Vaca Key, Florida Bay · ft MLLW · not a weather buoy

Wind

NWS

NESWMPH

No wind reading

Buoy

NDBC SMKF1

Quiet

Sombrero Key did not report. Witness only — not the tide clock.

Sky

NWS

Sky not in

Sky not in

A 20% shower chance is not a cancel. A soaker is.

Moon

99% lit

Full

spring range · 99%

Water

No gauge

Water

48°92°

Today’s range 0.8 ft

high slack

0.22 ft MLLW

Coast

No live coast layer

Red-tide check failed. That is not all-clear — open the agency page before you wade.

Sargassum check failed. Not a GPS pin. Not all-clear.

Clock

NOAA 8723970

  • LowTue 7:30 AM · 0.20
  • HighTue 3:00 PM · 0.60
  • LowTue 8:11 PM · -0.22
  • HighWed 4:59 AM · 0.51
  • LowWed 8:08 AM · 0.20

Monthly YOLO day

Friday, August 28

Best remaining dry day this month with a real wind forecast. full · spring · tide range ~0.7 ft · wind to 10 mph · Thunderstorms · 40%

Next two weeks

Pulling the 14-day strip…

Where

This pip is that mark on this tide — not the day on the ring.

  • FL - Long Key State Park (Keys)

    sand dropoff · saved map · mid

    7.2

    Oceanfront camping with bonefish flats at the tent. Reserve far ahead. · camp-surf · GULF ATLAS! - FISH

    • sand dropoff on a high slack tide is a secondary match.
    • In-play: Permit, Tarpon, Bonefish, Hogfish, Yellowtail snapper.
    structurespinwade
  • Marathon bayside basins

    grass flat · public structure · mid

    6.8

    Vaca Key gauge. Backcountry light. Summer showers, then wait for the color to come back.

    • grass flat on a high slack tide is a workable match.
    • In-play: Tarpon.
    skiffkayakflyspin
  • Seven Mile Bridge current

    channel gut · public structure · deep

    6.6

    Current seams. Permit and tarpon. Not a bonefish walk.

    • channel gut on a high slack tide is a secondary match.
    • In-play: Permit, Tarpon.
    skiffstructurespinfly
  • Vaca oceanside wrecks / patches

    wreck edge · field manual · deep

    6.6

    Crab on the wreck is a different permit game than the tailer on the flat.

    • wreck edge on a high slack tide is a secondary match.
    • In-play: Permit, Tarpon.
    skiffspinfly

When

When is moving water in a good hour — not the day. First light and last light are named when the clock is the story. Today’s ring mixes the best mark, the lead fish, and the best window, then taxes the sky. A strong incoming can sit under a weak day if the wind or the fish is off. Calendar cells are a third recipe: range, moon, and the day’s forecast.

  • Incoming water

    9.4

    Tue 9:00 AMTue 4:00 PM

    Moving water in the right part of the day.

  • Last light · outgoing

    9.1

    Tue 5:00 PMTue 10:00 PM

    Last light on outgoing water.

  • Last light · incoming

    8.0

    Tue 9:00 PMWed 7:00 AM

    Last light on incoming water.

  • First light · outgoing

    9.4

    Wed 6:00 AMWed 10:00 AM

    First light on outgoing water.

  • Incoming water

    9.4

    Wed 9:00 AMWed 5:00 PM

    Moving water in the right part of the day.

Launch and beach access

County and state ramps near this water. FKNMS no-take is Keys-only, on the legal list.

  • Bahia Honda State Park

    Florida State Parks

    Middle Keys bridge and oceanside. Adjacent FKNMS polygons are no-take — check the red rings.

    Official source

Legal water

NOAA FKNMS management zones — Sanctuary Preservation Areas, Ecological Reserves, Research-Only.

  • Sombrero Key

    Sanctuary Preservation Area — no fishing / no take (typical SPA)

    FKNMS GIS
  • Coffins Patch

    Sanctuary Preservation Area — no fishing / no take (typical SPA)

    FKNMS GIS

Why — and who

  • Tide is high slack from NOAA 8723970 Vaca Key, Florida Bay.
  • Full moon — spring tide range. Marsh and passes usually want the extra current of a spring.

Bonefish

Albula vulpes

7.3

Thermal window

64°92°

In peak season for this water.

Florida: catch-and-release only, hook-and-line only.

Permit

Trachinotus falcatus

7.3

Thermal window

66°92°

In peak season for this water.

Florida: hook-and-line. Special Permit Zone (Keys) is tighter than the rest of the state — typically C&R. Verify FWC.

Tarpon

Megalops atlanticus

5.5

Thermal window

68°94°

Present, not peak.

Florida: catch-and-release. Fish over 40 in must stay in the water. One harvest tag/year only for a potential IGFA record.

Hogfish

Lachnolaimus maximus

5.5

Thermal window

66°90°

Present, not peak.

Florida: Atlantic and Gulf bags differ. Monroe County is tighter. Fork-length minimum. Verify FWC.

Yellowtail snapper

Ocyurus chrysurus

5.5

Thermal window

66°90°

Present, not peak.

Florida: typically 12 in total length, inside the snapper aggregate. Verify FWC.

Great barracuda

Sphyraena barracuda

5.5

Thermal window

66°92°

Bycatch and beach noise — not the reason you came. Present, not peak.

Generally unregulated. Ciguatera risk rises with size. Do not keep a big one for the table.

Jack crevalle

Caranx hippos

3.7

Thermal window

64°94°

Bycatch and beach noise — not the reason you came. Off-season here.

Generally unregulated. Still, do not leave a pile.

Regs citedFWC saltwater recreational · current FWC regional rules · rolls in 7 days. Snook closures are regional. Boca Grande is not Jupiter. Verify FWC before you keep one.