İstanbul Boğazı fishing forecast
İstanbul Boğazı is a saltwater fishing spot in Marmara, Türkiye. Anglers here target Bluefish, Atlantic Bonito, Atlantic Horse Mackerel. The most productive months are typically September, October, November, December.
Today’s verdict
Ranks #85 of 437 spots FishRadar scored worldwide today
Trending up — 11 points above 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 | 23.9 °C |
|---|---|
| Wind | 33 km/h from ENE |
| Wave height | 0.9 m at 5 s |
| Current | 0.17 m/s toward N |
| Pressure | 1022 hPa |
| Depth | 49 m |
| Cloud cover | 0% |
| Chlorophyll | 1.62 mg/m³ |
| Salinity | 18.9 PSU |
| Mixed-layer depth | 10 m |
| UV index | 0 |
| Wind sea | 0.7 m at 3 s |
| Ground swell | 0.6 m at 5 s from NNE |
| Current shear (surface vs 50 m) | 0.17 → 0.00 m/s |
The water here is 3.3 °C warmer than the September average of 20.6 °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 26.7 m, with the thermocline below that.
Updated 1 h ago.
What the score means at İstanbul Boğazı
İstanbul Boğazı currently scores 83 out of 100 (Good). Water temperature is 23.9 °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
- Chlorophyll +18.0
- plankton density — the base of the food chain
- Current +18.0
- moving water concentrates bait
- Waves +9.0
- swell energy stirring the water column
- Barometric pressure +3.3
- falling pressure often triggers feeding
- Gust factor +3.0
- gustiness versus steady wind
What’s biting now
The model expects today: atlantic-bonito, horse-mackerel, bluefish, gilthead-seabream, european-seabass, common-pandora, comber, european-squid
Bite windows
Best months for İstanbul Boğazı:
Score history at this spot
30 days tracked at this exact location
Best recent day: 2026-08-24, 84/100
18 day(s) at 70+ in the tracked period
About this spot
Straits funnel strong tidal currents. Fish tend to feed around slack water and in the first hour of the flood or ebb, when bait is pushed through.
Approximate bottom depth: 49 m
Access & shore
Fishable from shore · rocky shore
On-site: parking · bait shop
What you can catch
-
Pomatomus saltatrix
-
Sarda sarda
-
Trachurus trachurus
Best months by species at İstanbul Boğazı
| BluefishPomatomus saltatrix | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Atlantic BonitoSarda sarda | ||||||||||||
| Atlantic Horse MackerelTrachurus trachurus |
Typical months; local seasons and closures apply.
Local regulations
| Species | Bag limit | Min size | Open season |
|---|---|---|---|
| Atlantic BonitoOfficial source | — | min 25 cm | Aug 15 – Mar 31 |
| Minimum 25 cm. Zaman yasağı (closed): 1 Nisan – 14 Ağustos. No count limit: 5 kg total. | |||
| Atlantic Horse MackerelOfficial source | — | min 13 cm | Jan 1 – Dec 31 |
| Minimum 13 cm. The tebliğ row covers two species (Trachurus trachurus and T. mediterraneus) at the same limit; our catalog resolves only T. trachurus. | |||
| BluefishOfficial source | — | min 18 cm | Jan 1 – Dec 31 |
| Minimum 18 cm (was 24 cm under the superseded Tebliğ 4/1). Tebliğ 6/2 sets ONE bluefish threshold — the "çinekop under 14 cm / sarıkanat 14–24 cm" size-class prose does not appear in 6/2 and no longer applies. No count limit: 5 kg total for the whole catch. | |||
All species combined
- maximum 5 kg or 3 fish total per day — The "Alıkonulabilir Miktar" column of Çizelge 7 is NOT a per-species daily bag. It is the total an angler may carry away, regardless of how many days were fished. Count-limited species caught together are treated as one species: total ≤ 3, provided no single species exceeds its own allowance. Weight-limited ("kg") species: ≤ 5 kg total, single or mixed. A single fish over 5 kg is lawful on its own; and if the largest fish is set aside and the rest weigh ≤ 4 kg, the catch is within limits. A 5% undersize tolerance applies to length limits.
Licensing:
- saltwater-recreational — residents Genel amatör olta balıkçılığı için belge zorunluluğu yoktur; 6/2 numaralı tebliğ kurallarına uyulması zorunludur., non-residents Yabancı uyruklu amatör balıkçılar için ayrı bir düzenleme yoktur; aynı tebliğ kuralları geçerlidir.
- saltwater-recreational — residents ZORUNLU (1 Ocak 2026’dan itibaren): sualtı tüfeği ile avcılık yapacak kişilerin il/ilçe müdürlüklerinden Amatör Balıkçı Belgesi alması gerekir., non-residents ZORUNLU (1 Ocak 2026’dan itibaren): sualtı tüfeği ile avcılık için Amatör Balıkçı Belgesi gerekir.
FishRadar regulation summaries are informational only and are not a legal source. Türkiye’s amateur fishing rules (Tebliğ 6/2, 2024/21) also include place bans, gear rules and freshwater tables that are not fully reproduced here. Always verify against the Resmî Gazete text and Tarım ve Orman Bakanlığı (BSGM) before fishing.
Check İstanbul Boğazı before you go
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Nearby spots
Explore 10 more fishing spots within 246 km of İstanbul Boğazı.
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Frequently asked questions
What fish can you catch at İstanbul Boğazı?
Anglers at İstanbul Boğazı target Bluefish, Atlantic Bonito and Atlantic Horse Mackerel.
When is the best time to fish İstanbul Boğazı?
The most productive months at İstanbul Boğazı are typically September, October, November, December.
What is the fishing forecast for İstanbul Boğazı right now?
İstanbul Boğazı currently scores 83 out of 100, based on live ocean and weather conditions — see the full breakdown on this page.
Can you fish İstanbul Boğazı from shore?
Yes — İstanbul Boğazı is fishable from shore (rocky shore).
Is the thermocline set up at İstanbul Boğazı right now?
Not strongly right now — the water column is fairly mixed, so fish are less depth-locked.
Is there a combined bag limit at İstanbul Boğazı?
Yes — on top of per-species rules, the local regulation caps your total take: maximum 5 kg or 3 fish total per day. Check the official source before keeping fish.
Fishing guides for this spot
- How to Catch BluefishHow to Catch Atlantic Bonito: Chasing the Autumn SpeedstersHow to Read Tides for Fishing
Forecasts, not guarantees — check local rules before you fish.