Tuesday, March 17, 2026
SMALL CRAFT ADVISORY in effect through Wednesday 8 PM EDT. Seas building to 5–8 ft this afternoon. Get off the water by noon.
Conditions Headline
Post-frontal north winds are running 15–20 kt this morning and building to 20–25 kt this afternoon across all Palm Beach and Broward zones. Seas are 3–5 ft now and building to 5–8 ft by tonight. Every region from Jupiter to Miami is NO-GO today and through Wednesday.
Key Largo remains your only option - Rainbow Reef's Captain Jim reported 50 ft vis at Eagle Ray Alley yesterday afternoon.
BHB has a morning window at 7:50 AM only - conditions deteriorate fast after that. Do not dive after noon anywhere north of the Keys today. Verify with your operator before you splash.
Daily Data
Observed | Predicted | Not reported |
Visibility methodology: Offshore sites (Jupiter, Ft. Laud., Miami) baseline 40–80 ft, penalized for seas and rain. Inshore / nearshore sites (BHB, Palm Beach, Deerfield) baseline 20–50 ft, penalized more aggressively. Key Largo: same-day observed report used directly.
Region | Call | Vis | Temp | Seas | Wind / Note |
|---|---|---|---|---|---|
Jupiter / Tequesta | NO-GO | ~15–25 ft (P) | ~73°F (P) | 3–5 ft | N 15–20 kt |
Blue Heron Bridge | MARGINAL | ~15–20 ft (P) | ~75°F (P) | Protected | High tide: 7:50 AM / 8:08 PM |
Palm Beach / Singer Is. | NO-GO | ~15–25 ft (P) | ~73°F (P) | 3–5 ft building | N 15–20 kt |
Deerfield / Pompano | NO-GO | ~15–25 ft (P) | ~74°F (P) | 3–5 ft building | N 15–20 kt |
Fort Lauderdale | NO-GO | ~15–25 ft (P) | ~74°F (P) | 3–5 ft building | N 15–20 kt |
Miami / Key Biscayne | NO-GO | ~15–25 ft (P) | ~75°F (P) | 3–5 ft building | N 15–20 kt |
Key Largo / Upper Keys | GO | 50 ft | ~78°F | 2–3 ft Hawk Ch. | N 15–20 kt |
NOAA AMZ650 issued 4:01 AM EDT Tue Mar 17 2026 (Small Craft Advisory through Wed 8 PM EDT). BHB tides: iDiveFlorida Phil Foster Park Mar 17 2026 — high tide 7:50 AM / 8:08 PM. Key Largo: Rainbow Reef captain log Mar 16 2026, Captain Jim, Eagle Ray Alley. Temps adjusted for post-frontal airmass. All vis except Key Largo predicted from sea state model.
Marine Life Sighting Alert
Confirmed — Key Largo, Mar 16 (most recent observed report)
Captain Jim filed from Eagle Ray Alley at 3:19 PM yesterday - 50 ft vis, 2–3 ft seas, no current. Conditions held through the evening.
Blue Heron Bridge: rays, seahorses, octopus, and frogfish typical at the morning high tide - 7:50 AM is your window today, nothing after 8:20 AM.
Jupiter and Palm Beach: sharks, grouper, and rays on ledges are consistent with seasonal pattern but seas are too rough for a dive report today.
Daily Safety Tip
Multi-day blow — Small Craft Advisory through Wednesday 8 PM
NOAA flags seas building to 5–8 ft this afternoon with 20–25 kt north winds. This is a multi-day event - do not plan offshore dives Tuesday or Wednesday anywhere north of Key Largo.
BHB window is 7:20–8:20 AM only. Outside that window current will be strong and vis drops fast on the outgoing tide.
Key Largo is the only safe dive today - get your dives done before noon. Never dive alone.
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