BSL Train Bridge ReefBay St. Louis
dangerousexposed head-on to the swell today
- window
- tide
- shelter
- hazard
- access
Old railroad-bridge rubble; boat entry.
Google MapsBay St. Louis spearfishing forecast — wind, swell, visibility, tides & live cameras
2.5
wave 1.2 m
visibility1m
Today — sit it out — wave, wind and visibility.
Sources: IPMA · NDBC · Copernicus — high confidence · data 17:55
Sources & confidence
- Sources
- IPMA · NDBC buoys · Copernicus Marine
- Method
- Model consensus, read per window
- Freshness
- Re-read every hour, per coast
Compiled by the spearo sea-state engine
The verdict comes from seven water factors and hard safety gates — not ten tabs. Go or stay.
How we score the water
Our own model
Our own forecast engine — not a third-party widget. It weighs these water factors into one go-or-stay verdict for this coast; the 0–10 dial is that verdict, read out as a number.
- Swell & wave memory
- Height, period and direction of the swell, plus the wake of recent storms — an old storm still stirs the water, and the engine remembers.
- Wind & gusts
- Speed and gusts, hour by hour — wind speed and an onshore push chop the surface and cut visibility.
- Tide phase
- Timing and range of the tide, calibrated per coast — big spring tides pull the verdict toward caution.
- Water temperature
- Sea-surface temperature — sharply cold water vetoes a green verdict.
- Currents & outflow
- Direction and drift of the current — it pushes you, and it drags turbid coastal water across where you dive.
- Rain runoff & air clarity
- Rain muddies the water inshore through land runoff, while fog and haze cut visibility at the surface.
- Coast shape & exposure
- How the coast faces the swell — a sheltered cove keeps the water clean; an exposed, head-on point takes a penalty.
Safety gates
- Thunderstorm forecast — an instant red, no exceptions.
- An official warning (MeteoAlarm / IPMA) — yellow, or red for the higher ranks.
- Missing input data — a would-be green is capped to yellow rather than overstated.
- Strong disagreement between forecast models — a green day is pulled back to yellow.
- Night hours — forced red; the window is closed after dark.
It all folds into a single 0–10 score and one verdict: go or stay.
A forecast, not a guarantee — the sea has the last word.
Where to get in, where to hunt
Entry points with coordinates
Seabed relief — promising ground
Surface
Wind, wave and the swell windows — when to go and the best hours.
spearo.app
calmupdated 17:55
Bay St. Louis — solo, off the rocks
don't go · wave 1.2 m + swell period 5 s
wave 1.2 mwind 42, gusts 54 km/hvisibility ~2 m
today, best window 15:00–18:00
fish · Visibility 2 m · Water 32°C
confidence low · verdict for the selected day
Whole week — tap a day. is driving swell right now.
Solo risk: carry a float · tell someone your plan and exit time · doubt = don't go. A model-based planner; the call is made on site.
Selected day
Windows, hours
and the day's trends.
The day is picked above, in the hero. Here are that day's windows, the hour-by-hour map and the trends. Tap a window to break down the conditions.
Wednesday · today2026-07-22
06:10–19:57 · first quarter
▲ 06:00▼ 12:00▲ 18:00▼ 23:00 · 0.4 m
Hours (06→20)
15
18
Day's trends
Tide0.32 m
Wave1.28 m
Wind29 km/h
Water32 °C
fish activity: moonset 00:27 · moderate · moon underfoot 07:30 · high · moonrise 14:33 · moderate · moon overhead 19:50 · high
Conditions window15:00–18:00
don't go fish
Hs 1.22 mperiod 5.4 swind 42→54surge 0.2viz 1 m
1.22 mup to ~2.44 · 135° at an angle
5.4 sswell moderate
42→54gusts 54 km/h
0.2weak surge
0.08m/s
1 mrecent swell
32°C5 mm + hood
▲18:00tide turn near
Atmosphere7 kmovercast
moderatemoonrise
- wave 1.2 m + swell period 5 s
- steep wind-wave — choppy surface, careful on entry
- flood toward high water
confidence lowday
The water column
Visibility and what drives it — post-storm clearing, river plume, temperature and the thermocline.
What it is
A marine instrument,
go / no-go for solo hunting.
spearo.app folds wind, wave, swell period, visibility, tides, water temperature and risk into a single verdict — go to the spot or not. It computes 7 days ahead from open marine models (Open-Meteo, IPMA), with no sign-up and no accounts. Built for solo spearfishing off the rocks, where any mistake costs dearly.
Now live: 1152 spots across 189 stretches of coast — mainland Portugal, Madeira and the Azores.
See all spotsThe seabed
Relief and bottom type, tides, and the depths of each spot.
On the rock
The forecast is the plan.
The call is on the rock.
The models set the window. Whether you go in is read only at the water: count the sets, watch the surge on the entry. If in doubt, you don't get in.
Entry points
Where to get in
off the rocks.
Scouted entries, coloured by today. The colour is the sea state at the spot, not a guarantee: the wash and a slippery entry you judge on site.
Open the seafloor map
Cat Island ReefBay St. Louis
dangerousexposed head-on to the swell today
- window
- tide
- shelter
- hazard
- access
Sheltered SW of Cat Island (cleaner) ~27 km; partly federal - verify local; boat entry.
Google MapsCedar Point ReefBay St. Louis
dangerousexposed head-on to the swell today
- window
- tide
- shelter
- hazard
- access
Limestone and concrete inshore reef; shore or boat entry.
Google MapsSOLO is the biggest risk: underwater you can black out from lack of oxygen silently and fatally, with no one around. Solo is never truly «safe». Below are the best weather windows; carry a buoy, tell someone your plan and exit time, and any doubt — don't go.
Surfacing
Cameras, map and reference — to hand as you come up.
Live cameras, map & reference
Cameras · live
Look at the water
right now.
Check the cam BEFORE you leave. Foam, brown/green murk, or waves washing the entry rocks = No-go. At night/in fog the cam is useless — treat it as «unknown», NOT «green».
Reference
What's in season,
what the law says.
In season now
- red snapperRed snapper: state-set season (typically May–Oct), 2–4/day, 15–16″.
- sheepshead
- flounder
- cobia (ling)Texas: spear NONGAME only (sheepshead/flounder); gamefish (red drum/seatrout/cobia) pole-and-line only.
Law
- ✓Saltwater licence (+endorsement) per state: FL $17/$47, AL res $30, MS ~$13/$30, LA res $32, TX licence + saltwater endorsement.
- ✓Texas: spear only (sheepshead/flounder); gamefish (red drum/seatrout/cobia) pole-and-line only.
- ✓Red snapper: state-set season. Federal reef waters: spear + allowed outside the stressed area, descending device required.
- ⛔ 🚫 Goliath/Nassau grouper, Gulf sturgeon, sawfish, sea turtles, mammals and many sharks — take prohibited.
- ⛔ ⚠️ Texas & Alabama: gamefish (red drum/seatrout) pole-and-line only, NOT by spear. : banned in FL/TX, allowed in federal waters outside the stressed area.
US spearfishing law is state-by-state. License, spearable species, powerhead rules and distances vary; federal sanctuaries (Gray's Reef, the Keys, Flower Garden Banks) ban spearfishing. Always confirm with the state agency and local ordinances.
Safety protocol
- Sets: watch the wave trains ≥15 min before entering; Hmax ≈ 2×Hs, the wash can run 50 m past the foam line. A lull >10 min with period >12 s = a big set «overdue», do NOT enter; enter right after a full set passes and re-check at minute 30.
- Exit FIRST: find your exit AND a backup before entering. On a rocky/boulder shore a 0.5 m rise in swell can make the exit impossible — getting pinned/unable to climb out is the main killer.
- Headland rip: prominent points often have a permanent topographic rip regardless of the model — locate it, enter/exit on the windward side, never swim against it.
- Cold: wetsuit per the SST chip; the first shiver = a metabolic surge and a drop in breath-hold → get out at the first steady shiver. Cap the session at 45–60 min below 15 °C.
- Solo discipline: buoy up; tell someone the spot and exit time; conservative breath-hold (never push it in cold/murky/surfy water); visibility <3 m — don't enter.
- Afternoon wind: on many coasts the wind builds from midday — plan to be out of the water by midday; the chop builds — get out.
- UV 11:00–15:00 (UVI ≥6): sunscreen and cover up on the surface interval.
- Solo is a fundamental risk (hypoxic blackout with no buddy). Any doubt = No-go.
Spearfishing in Bay St. Louis: spots, seasons and rules
Spearfishing Bay St. Louis is not a blue-water reef fantasy. It is a modest Mississippi stop because the western Mississippi Sound is often turbid and the inshore reefs are shallow, roughly 1 to 2 m. The practical plan is to scout Cedar Point Reef or the old train bridge rubble when conditions are settled, then run toward Cat Island Reef when you need cleaner water. Mississippi allows spear and gig take for finfish with a saltwater license, but the Gulf Islands National Seashore creates a 1 mile no-spear ring, and red snapper remains season-controlled.
TL;DR
- Bay St. Louis is a dirty-water Mississippi Sound option, with shallow inshore rubble and a cleaner boat run toward Cat Island.
- Cedar Point and the train bridge reef are local checks; Cat Island Reef is the visibility play but needs boundary verification.
- Mississippi requires a saltwater license and allows spear or gig take for finfish, with seasons still controlling species like red snapper.
- Stay outside the Gulf Islands National Seashore no-spear ring and fail closed around federal or park boundaries.
Where are the workable Bay St. Louis spearfishing spots?
These are modest Mississippi Sound options. Cat Island can involve federal water, so boundaries matter more than the name of the reef.
| Spot | Type | Depth | Level | Access | Notes |
|---|---|---|---|---|---|
| Cedar Point Reef | Limestone and concrete inshore reef | Very shallow inshore water, around 1 to 2 m | Beginner only in calm, clear conditions | Shore or boat entry | A close check when you want a short Mississippi Sound dive. Expect turbidity, low relief and limited visibility windows. |
| BSL Train Bridge Reef | Old railroad-bridge rubble | Shallow rubble; exact depth not stated | Intermediate because of traffic and low visibility | Boat entry | The bridge rubble gives sheepshead and flounder type structure, but it is still a dirty-water plan. Do not dive it without a flag and a boat-aware setup. |
| Cat Island Reef | Sheltered reef southwest of Cat Island | Cleaner offshore Sound water; exact depth not stated | Intermediate boat dive | Boat run, about 27 km | This is the cleaner option, but the note says partly federal. Verify National Seashore and local boundaries before spearfishing. |
When does Bay St. Louis water visibility improve?
Visibility improves by distance from the turbid inshore Sound. Cedar Point and the train bridge are convenience checks; Cat Island is the better shot at cleaner water. The coast is sheltered, but a southerly wind or chop can still stir the Sound. Use the municipal harbor and Silver Slipper camera views for surface color, then compare them with PNLM6 for broader Gulf conditions.
What can you legally spear in Mississippi?
Mississippi allows bow, spear and gig take for finfish with a saltwater license. Good practical targets are sheepshead and flounder, while red snapper is season-controlled and often tied to state-set openings. Do not take Goliath or Nassau grouper, Gulf sturgeon, sawfish, sea turtles, marine mammals or prohibited sharks.
How does Gulf Islands National Seashore change the plan?
The important Bay St. Louis boundary is the 1 mile no-spear ring around Gulf Islands National Seashore islands. That matters around Cat Island and any barrier-island run. If the chart, park rule or GPS position is uncertain, treat the water as closed and move to a verified reef outside the ring.
FAQ
Is Bay St. Louis good for clear-water spearfishing?
Only occasionally. The western Mississippi Sound is often turbid; cleaner water is more likely toward Cat Island than at the inshore reefs.
Do you need a Mississippi saltwater license?
Yes. Mississippi saltwater licensing applies before spearing finfish.
Can you spear red snapper from Bay St. Louis?
Only when the relevant season and area are open. Red snapper is season-controlled, so check current Mississippi and federal rules first.
Is Cat Island Reef automatically open?
No. Cat Island can involve federal water, and Gulf Islands National Seashore has a 1 mile no-spear ring. Verify before hunting.
What is the safest Bay St. Louis target style?
Short, shallow structure dives for sheepshead or flounder on settled days, with a visible flag and conservative expectations for visibility.
Sources
Nearby towns
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