Brenton-on-SeaKnysna
dangerousexposed head-on to the swell today
- window
- tide
- shelter
- hazard
- access
Rocky reef off Brenton beach west of the Heads; steenbras, kob and blacktail. Open-coast entry, watch the SW swell.
Google MapsKnysna spearfishing forecast — wind, swell, visibility, tides & live cameras
2.5
🌫 Murky all week after the storm — the water isn't settling
visibility1m
Tomorrow — sit it out — wave, wind and surge pounding. 🌫 Murky all week after the storm — the water isn't settling
Sources: IPMA · NDBC · Copernicus — high confidence · data 23:03
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 23:03
Knysna — solo, off the rocks
don't go · wave 2.1 m (occasionally up to ~4.2 m)
wave 2.1 mwind 15, gusts 28 km/hsurge pounding the rocksvisibility ~1 m
Thursday, best window 06:00–09:00
fish · Visibility 1 m · Water 17°C
confidence medium · 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.
Thursday2026-07-23
07:26–17:41 · first quarter
▼ 04:00▲ 10:00▼ 16:00▲ 23:00 · 0.4 m
Hours (06→20)
06
09
12
15
18
Day's trends
Tide-0.03 m
Wave2.86 m
Wind11 km/h
Water17 °C
fish activity: moonset 02:22 · moderate · moon underfoot 07:30 · high · moonrise 12:31 · moderate · moon overhead 19:50 · high
Conditions window06:00–09:00
don't go fish
Hs 2.10 mperiod 8.4 swind 15→28surge 27.2viz 1 m
2.10 mup to ~4.20 · 204° at an angle
8.4 sswell moderate
15→28gusts 28 km/h
27.2pounding the rocks
0.06m/s
1 mrecent swell
17°C5 mm + hood
▲10:00tide rising
Atmosphere40 kmlandmarks visible
highmoon underfoot
- wave 2.1 m (occasionally up to ~4.2 m)
- long secondary swell (9 s)
- flood — water rising
confidence mediumtwilight
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
Buffalo Bay (Buffels)Knysna
dangerousexposed head-on to the swell today
- window
- tide
- shelter
- hazard
- access
Reef off the Buffalo Bay point west of Knysna; kob, garrick and musselcracker, sheltered from SE. Easy open-coast entry.
Google MapsConey GlenKnysna
dangerousexposed head-on to the swell today
- window
- tide
- shelter
- hazard
- access
Ocean-side reef at the Eastern Head, seaward of the Knysna Heads; kob, garrick and musselcracker. The lagoon side is estuarine — no spearing inside the Heads.
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
- yellowtail
- garrick / leervis
- geelbek (Cape salmon)
- galjoen (national fish)National fish but NOT no-take: legally spearable (35 cm, bag 2), closed 15 Oct–end Feb.
- kob / kabeljou
- red roman
- king mackerel (couta/cuda)
- elf / shad⚠️ Closed 1 Sep–30 Nov (spawning). Don't take it then.
- white musselcracker
- hottentot
Law
- ✓You need a endorsed for SPEARFISHING (MLRA 18/1998). Buy it online (fishing.dffe.gov.za) or at an authorised office (SAPO branch) — check the current fee there. Own use only — sale is banned.
- ✓Breath-hold + snorkel only — scuba/hookah are BANNED (reg 8). Spearfishing in is FULLY BANNED (reg 16, no exceptions). Daily cap of 10 fish total. Inside an obey the managing authority; in several you can't even CARRY a speargun.
- ⛔ 🚫 Table 3 (zero possession): brindle bass (Epinephelus lanceolatus), potato bass (E. tukula), seventy-four (moratorium since 1998), great white / whale / basking sharks, sawfishes, coelacanth, Natal wrasse.
- ⛔ 🚫 All hard corals, sea fans and sea pens (Scleractinia/Gorgonacea/Pennatulacea) — protected. Seahorses/pipefish (Syngnathidae) — no-take.
- ⛔ 🚫 Spearfishing in is FULLY BANNED (reg 16 — no exceptions). Inside an obey the managing authority's conditions; in several you can't even CARRY a speargun (Sardinia Bay, Bird Island, Robben Island etc.). Abalone (perlemoen) — recreationally closed until further notice.
Rules change. Before heading out, check with the DFFE (Marine Recreational Fishing brochure / permit) and the MPA managing authority (SANParks / CapeNature / Ezemvelo KZN / ECPTA / iSimangaliso).
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 Knysna: spots, seasons and rules
Knysna is defined by one hard rule: the lagoon is not a spearfishing venue. The productive water is outside the Heads, on ocean reefs where Garden Route species mix with swell, current, and a dangerous tidal inlet. The Heads can run like a river on the ebb, so the practical window is close to slack water and preferably from a boat. Coney Glen, Brenton-on-Sea, and Buffalo Bay are the listed reef choices, but none override the national estuary ban or the need for a valid MLRA spearfishing permit.
TL;DR
- Knysna is an ocean-side spearfishing destination only; the lagoon and estuary inside the Heads are closed to spearing.
- The Heads tidal race is the main hazard. Dive the ocean side only near slack water, with boat access strongly preferred.
- Coney Glen, Brenton-on-Sea, and Buffalo Bay offer reef options for kob, garrick, musselcracker, steenbras, and blacktail.
- A South African MLRA spearfishing permit is required, scuba is banned, and restricted or uncertain MPA water should be treated as closed.
Where can Knysna spearfishing be considered?
Think ocean side first, lagoon side never. The listed marks are outside the estuary system, but exits, tide, and swell decide whether they are usable. If the Heads are running hard, the correct plan is to wait, not to fight the flow.
| Spot | Type | Depth | Level | Access | Notes |
|---|---|---|---|---|---|
| Coney Glen | Ocean-side reef at the Eastern Head | Reef outside the inlet | Advanced timing around slack water | Ocean-side shore or boat approach | Kob, garrick, and musselcracker are listed here. The lagoon side is estuarine, so stay outside the Heads and avoid the ebb race. |
| Brenton-on-Sea | Rocky reef west of the Heads | Open-coast reef and sand edge | Intermediate open-coast dive | Beach and rock approach from Brenton | This west-side option lists steenbras, kob, and blacktail. It is more exposed to southwest swell, so small surf and a planned exit matter. |
| Buffalo Bay (Buffels) | Reef off the Buffalo Bay point | Point reef and reef edge | Intermediate, easiest open-coast mood | Shore entry at Buffalo Bay | Buffalo Bay is sheltered from southeast wind and lists kob, garrick, and musselcracker. It is still ocean water, not a reason to ignore swell. |
Why is the Knysna lagoon closed?
South Africa bans spearfishing in estuaries, and Knysna's lagoon is a restricted estuary. That means no speargun inside the lagoon or on the inside of the Heads. The listed diving is seaward of the inlet, where reef, swell, and current replace flat-water assumptions.
How should tide control the dive?
The local warning is blunt: the Knysna Heads tidal race is lethal on the ebb. Ocean-side dives should be planned within roughly 45 minutes of slack water, and boat access is strongly advised. A moderate swell against outgoing flow can make the channel and nearby rocks far worse than they look from shore.
Which fish are realistic?
Local fish include kob, white steenbras, musselcracker, garrick, and blacktail. Kob has a 40 cm minimum and garrick has a 70 cm minimum. White musselcracker has a 60 cm minimum. Protected Table 3 species, hard corals, seahorses, pipefish, and recreational abalone remain off limits everywhere.
What rules travel with you?
Carry a recreational permit endorsed for spearfishing under MLRA rules. DFFE online and authorised SAPO branches are the named routes, with the current fee checked at issue. Spearfishing is breath-hold only, scuba and hookah are banned, catch is for personal use, and the national daily fish cap is 10 unless species rules are tighter.
FAQ
Can you spearfish inside Knysna lagoon?
No. The lagoon is estuarine water, and South Africa bans spearfishing in estuaries without exception.
When is the safest tide at the Heads?
Plan ocean side only within about 45 minutes of slack water. Avoid the ebb race.
Is a boat needed in Knysna?
Boat access is strongly advised because the Heads are dangerous and shore timing can be unforgiving.
Which Knysna spot is sheltered from southeast wind?
Buffalo Bay is specifically noted as sheltered from southeast wind, though swell still has to be small.
Do I need the national spearfishing permit?
Yes. The MLRA recreational permit must be endorsed for spearfishing before you enter with a gun.
Sources
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