Captain's Log — April 4, 2026

Saturday and the easterly is still punching. The same broad Atlantic high that’s been running the show all week is finally beginning to weaken and drift east — but not before giving us one more day of Small Craft Advisory conditions. The good news: Sunday through Monday is shaping up to be a legit window, and the Gulf Stream is sitting right on our doorstep. If you’re not already booked for Sunday, pick up the phone.

Conditions

Wind: East 20 knots today. Tonight stays near 20, slowly backing to 15-20. By Sunday we’re down to E 15-20 with seas calming, and Monday drops to NE-E 10 knots with 1-2 foot seas. That Monday calm doesn’t last — NE 20-25 returns by Tuesday night as the next system builds.

Hawk Channel (Upper Keys): Small Craft Advisory. East 20, seas 3-5 feet, occasionally to 6. Rough nearshore. Experienced crews can work it but it’s going to test you. Tonight similar. Sunday: 2-4 feet occasionally 5 — choppy but manageable. Sunday night: 2-3 feet dropping to 1-2. Monday is the sweet spot: 1-2 feet throughout.

Straits of Florida: Small Craft Advisory. East 20, rough to very rough. Wave period is short — this is stacked chop, not rollers. Not a day to be offshore in anything under 30 feet. The Stream is close but today it’s not worth the beating.

Florida Bay / Backcountry: Small Craft Advisory. East 20, rough on the open bay. Protected pockets in the lee of the islands offer some relief. Barnes and Blackwater sounds are sloppy. If you’re going backcountry today, pick your spots carefully and stay out of the open crossings.

Slight chance of showers today and tonight. Nothing organized — passing cells possible, keep an eye on radar.

Tides — Islamorada Area (Vaca Key Station)

• High: 5:27 AM — 0.46 ft
• Low: 8:19 AM — 0.25 ft
• High: 3:12 PM — 0.72 ft ← Afternoon high, best fishing window
• Low: 9:16 PM — -0.38 ft ← Negative tide, flats drain hard

That afternoon high into negative low tonight creates serious water movement. Afternoon incoming builds baitfish activity on the reef edges. The hard drain tonight will push everything off the flats — predators stack up at the dropoffs waiting for the buffet.

Water Temp

Surface temps are holding in the upper 70s (77-79°F) across the reef zone — right in the wheelhouse for kingfish, yellowtail, and the early mahi push. The Stream water bleeding inshore is pushing the warmest water right up against the Upper Keys reefs.

Gulf Stream Position

Per NWS Key West (as of March 28):

• 15 NM Southeast of Alligator Reef Light — off Islamorada
• 7 NM Southeast of Molasses Reef Light — off Key Largo
• 20 NM Southeast of Sombrero Key — off Marathon

The Stream is pulled in tight to the Upper Keys. When conditions lay down Sunday, the run to the edge from Islamorada is a 20-30 minute ride. Don’t sleep on this window.

Reef-by-Reef Breakdown

Molasses Reef (Key Largo)

Gulf Stream sits only 7 NM offshore — the closest in the entire Keys chain. Today’s 3-5 foot chop in Hawk Channel makes the run from MM 90 uncomfortable but doable for the right boats. Yellowtail on the reef is the move today — chum hard, fish the down-current side. Sunday-Monday: prime sailfish territory. The color change will be right there.

Conch Reef

Full east exposure today — wind chop building against the current makes for an uncomfortable drift. If you push out, work the west-facing lee of the reef structure for yellowtail and mutton snapper. Muttons are pre-spawn staging; live crabs or lobster tails on the bottom in 60-80 feet.

Davis Reef

Between Conch and Alligator, Davis gets hammered by the full easterly fetch. Not a priority target today unless you’re specifically after bottom fish willing to sit in current. Save it for Sunday.

Crocker Reef

Geometry offers marginal improvement over the more exposed reefs. If you’re running out of the Upper Keys today and want to check the reef before turning around, Crocker is worth a look. Yellowtail and cero mackerel on the reef edges. Chum gets them fired up fast.

Alligator Reef

Home base. East 20, 3-5 feet. The lighthouse is taking the brunt. Gulf Stream 15 NM out — tantalizingly close today, realistically fishable Sunday. Kingfish are patrolling the reef edge as baitfish push through with the current. Slow-troll live bait or run a king rig. Afternoon high tide into the current change is the best window today if you go.

Tennessee Reef

The westernmost Upper Keys reef, slightly more sheltered from due east. This is your best bet if you MUST fish today — Tennessee sits in a bit of a geographic lee. Bottom fish for yellowtail and mutton snapper. Structure holds fish even when the water is moving hard.

Species Outlook

🐟 Sailfish: Today and Saturday are not sailfish days. Too rough, too uncomfortable. But Sunday-Monday? The Stream is right there at 15 NM, seas drop to 1-3 feet, and temps are perfect. That’s a fire drill — have your spread ready.

🐟 Mahi-Mahi: April is mahi month in the Keys. When the wind lays down Sunday, run the color changes and weed lines on the Stream edge. Early mahi push is on — look for anything floating: weed patches, debris, birds working.

🐟 Yellowtail Snapper: Best realistic target today. Heavy chum slick, small hooks (size 6-8), 20-30 lb fluorocarbon. They’ll bite in rough water if you can hold position. The afternoon high tide bite should fire up around 2-3 PM.

🐟 Mutton Snapper: Pre-spawn staging on the deeper reef structure, 60-90 foot range. Full moon was April 1 — three days out and the spawn bite is still primed. Live pilchards, live blue runners, or lobster tails. Get them before the next front turns off the bite Tuesday night.

🐟 Kingfish: Reef edges and the first blue water, particularly around Alligator and Tennessee. Current is their friend. Slow-troll live bait or pitch a spoon in the current on the down-tide side of the reef.

The Play

Today (Saturday): Reef fish for yellowtail, mutton, and kingfish. Don’t push offshore. The afternoon tide change (2-4 PM) is the prime window. Flat-calm it ain’t, but yellowtail don’t care.

Sunday: This is the day. Seas 2-4 feet calming through the day, east 15-20 backing off. Run the Stream edge for sailfish and mahi. Gulf Stream is 15 NM — you’ll be on the color change in 30 minutes. Keep an eye on Sunday evening; conditions continue to improve overnight.

Monday: Best day of the stretch. NE-E 10 knots, 1-2 foot seas. Doors wide open. All species are in play. Get offshore early and fish hard — the next front is already on the clock.

Tuesday night onward: NE 20-25 returns. New front builds seas back to 4-7 feet by Wednesday. The pattern repeats. Fish the window.

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Report generated from NOAA Coastal Waters Forecast (NWS Key West, 4:23 AM EDT April 4, 2026), NOAA Tide Predictions for Vaca Key Station (8723970), and Gulf Stream position data via NASA SPoRT/RTOFS courtesy of NWS Key West.