Sylt Hoernum Deep fishing forecast
Sylt Hoernum Deep is a saltwater fishing spot in Schleswig-Holstein, Germany. Anglers here target European Plaice, European Flounder, Sea Trout, Turbot. The most productive months are typically April, May, June, July, August, September, October.
Today’s verdict
Ranks #604 of 644 spots FishRadar scored worldwide today
Trending down — 27 points below this spot’s 7-day average
Score confidence ±4 points, from 8 live signals
The statistical model disagrees with the physics model here today — treat this score with extra caution.
Current conditions
| Sea surface temp | 18.7 °C |
|---|---|
| Wind | 27 km/h from NNW, gusting 42 km/h |
| Wave height | 1.3 m at 5 s |
| Current | 0.06 m/s toward SW |
| Pressure | 1022 hPa |
| Cloud cover | 100% |
| Chlorophyll | 6.78 mg/m³ |
| Salinity | 31.8 PSU |
| Mixed-layer depth | 12 m |
| UV index | 0 |
| Wind sea | 0.7 m at 3 s |
| Ground swell | 1.0 m at 5 s from NW |
| Current shear (surface vs 50 m) | 0.06 → 0.00 m/s |
The water here is 5.1 °C warmer than the August average of 13.6 °C. Warmer-than-normal water pushes cool-water species deeper and brings warm-water species in earlier than the calendar suggests. The water is mixed to about 30.0 m, with the thermocline below that.
Updated 1 h ago.
What the score means at Sylt Hoernum Deep
Sylt Hoernum Deep currently scores 52 out of 100 (Good). Water temperature is 18.7 °C. 8 forecast signals are active in this score.
- Water temperature +25.0
- how close the water is to this species mix’s comfort band
- Waves +9.0
- swell energy stirring the water column
- Current +6.6
- moving water concentrates bait
- Chlorophyll +5.4
- plankton density — the base of the food chain
- Chlorophyll front +4.2
- a plankton edge — classic feeding line
- Wind +3.6
- surface chop, oxygen and bait drift
What’s biting now
The model expects today: sea-trout, atlantic-mackerel, atlantic-halibut, grey-gurnard, atlantic-wolffish, atlantic-salmon, greenland-halibut, garfish
[object Object] — Protected here — release immediately
Bite windows
Best months for Sylt Hoernum Deep:
Score history at this spot
13 days tracked at this exact location
Best recent day: 2026-08-20, 82/100
11 day(s) at 70+ in the tracked period
26 points below the same day last week
About this spot
Channels concentrate moving water and strong tidal flow. The bite often picks up at slack water and through the first hour of the flood or ebb.
Access & shore
Fishable from shore · beach
What you can catch
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Pleuronectes platessa
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Platichthys flesus
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Salmo trutta trutta
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TurbotScophthalmus maximus
Best months by species at Sylt Hoernum Deep
| European PlaicePleuronectes platessa | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| European FlounderPlatichthys flesus | ||||||||||||
| Sea TroutSalmo trutta trutta | ||||||||||||
| TurbotScophthalmus maximus |
Typical months; local seasons and closures apply.
Local regulations
| Species | Bag limit | Min size | Open season |
|---|---|---|---|
| European FlounderRegulation (EU) 2019/1241, Annex VIII, Part A (Baltic Sea, sub-divisions 22-32) | — | — | Jan 1 – Dec 31 |
| NO EU MINIMUM SIZE IN THE NORTH SEA — flounder is absent from Annex V, so nothing supranational applies in the German Bight. It IS listed for the Baltic at 23 cm in ICES sub-divisions 22–25, which covers the German Baltic coast. Inland and coastal Land rules may set a size of their own. FishRadar publishes no figure here rather than borrowing the Baltic one for the wrong sea. | |||
| European PlaiceKüstenfischereiverordnung SH, as tabulated in the Merkblatt (Stand 01/2026) | — | min 27 cm | Jan 1 – Jan 31; May 1 – Dec 31 |
| The ministry gives two sizes — "Nordsee 27 cm" and "Ostsee 25 cm" — and this pack shows the stricter 27 cm, so a 26 cm Baltic plaice that is in fact legal will be shown as undersize. The closed season 1 February to 30 April applies to FEMALE plaice only ("weibliche Scholle vom 01. Februar bis 30. April"); the pack closes the whole window because sexing a plaice on the beach is not something a visiting angler can be expected to do reliably. | |||
| Sea TroutKüstenfischereiverordnung SH and Binnenfischereiverordnung SH, as tabulated in the Merkblatt (Stand 01/2026) | — | min 40 cm | Jan 1 – Sep 30 |
| THE Schleswig-Holstein fish — 40 cm on the coast and 40 cm inland. The closed season is CONDITIONAL, not absolute: 1 October to 31 December applies to fish "im Laichkleid" (in spawning colours), with "silbrige Fische mit losen Schuppen" — bright silver fish with loose scales — expressly excepted, so a clean silver sea trout may still be kept in that window. This pack encodes the window as closed because the exception depends on the angler judging the fish's condition, and the conservative reading is the one that cannot get a reader fined. Inland the closure is longer and unconditional: 1 October to 28 February. Schleswig-Holstein sets no daily bag limit for sea trout (unlike Mecklenburg-Vorpommern, which caps it at three). | |||
| TurbotKüstenfischereiverordnung SH, as tabulated in the Merkblatt (Stand 01/2026) | — | min 30 cm | Jan 1 – May 31; Aug 1 – Dec 31 |
| 30 cm; closed 1 June to 31 July in the Baltic. The ministry table states the closure for the Ostsee only. | |||
Licensing:
- combined — residents Fischereischein, issued for life after passing the Fischereischeinprüfung (§§ 26–27 LFischG). It must be carried and shown on demand, and is valid only once the annual Fischereiabgabe has been paid. Not issued below the completed 12th year of age — "Einen Fischereischein erhalten keine Personen, die das zwölfte Lebensjahr noch nicht vollendet haben" — and younger anglers may fish under the supervision of a licence holder. Licences from other Bundesländer are valid in Schleswig-Holstein as long as the holder's main residence is not in Schleswig-Holstein., non-residents Urlauberfischereischein — a time-limited exception from the licence requirement under § 26 LFischG, whose validity "auf 28 hintereinander liegende Tage zu begrenzen ist". In the Küstengewässer it needs no further permit, EXCEPT on the Schlei, the inner Neustädter Bucht, the inner Lübecker Bucht/Travemünde and the Untereider from the B5 road bridge at Tönning to the Nordfeld lock, where an Erlaubnisschein from the holder of the fishing right is required as well. In all Binnengewässer an Erlaubnisschein is always required. People whose main residence is abroad can also obtain a full Fischereischein in Schleswig-Holstein.
- combined — residents A Fischereischein is required to fish, and it is issued only after passing the Fischerprüfung. In addition, a Fischereierlaubnisschein for the specific water is required — the Fischereischein alone does not entitle you to fish anywhere. Both must be carried. Rules, fees and the minimum age are set by each Bundesland., non-residents Visitors need the same two documents. Several Bundesländer issue a short-term Touristenfischereischein or Urlauberfischereischein without the examination — Mecklenburg-Vorpommern and Brandenburg among them — but not all do, and the conditions differ. Check the Land you intend to fish in before travelling.
Schleswig-Holstein is the only German Land on two seas, and its rules differ by sea as well as between coast and inland: cod is 35 cm and open in the North Sea but banned outright for recreational fishers in the Baltic, plaice is 27 cm in the North Sea and 25 cm in the Baltic. Where FishRadar cannot express that split it shows the stricter answer and states the other in the notes. Catch-and-release fishing is unlawful here (§ 39 LFischG) — fish only if you intend to use the catch. The EU cod and eel bans do not reach four named inner waters (Unterelbe, Untereider, Schlei, Trave), where the state minimum sizes apply instead. Marine recreational fishers must be registered and report catches through the RecFishing app since 10 January 2026. The figures shown here come from the ministry's published leaflet rather than from the ordinance text, which is not machine-readable, and the leaflet says its own lists are "nicht abschließend" — not exhaustive — and can change at any time. You need a Fischereischein or an Urlauberfischereischein, the Fischereiabgabe, and on inland waters an Erlaubnisschein. Always verify with the Schleswig-Holstein fisheries authority before you fish.
Check Sylt Hoernum Deep before you go
Live scores update through the day. Get the full forecast, bite windows, and your own saved spots in the FishRadar app.
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Frequently asked questions
What fish can you catch at Sylt Hoernum Deep?
Anglers at Sylt Hoernum Deep target European Plaice, European Flounder, Sea Trout and Turbot.
When is the best time to fish Sylt Hoernum Deep?
The most productive months at Sylt Hoernum Deep are typically April, May, June, July, August, September, October.
What is the fishing forecast for Sylt Hoernum Deep right now?
Sylt Hoernum Deep currently scores 52 out of 100, based on live ocean and weather conditions — see the full breakdown on this page.
Can you fish Sylt Hoernum Deep from shore?
Yes — Sylt Hoernum Deep is fishable from shore (beach).
Is the thermocline set up at Sylt Hoernum Deep right now?
Not strongly right now — the water column is fairly mixed, so fish are less depth-locked.
Fishing guides for this spot
- How to Catch Flounder: Drift, Jig, and Bottom Rigs That WorkHow to Catch TroutHow to Read Tides for Fishing
Forecasts, not guarantees — check local rules before you fish.