Karst Spring · Limestone · Herzegovina-Neretva Canton

Neretva (upper / Herzegovina)

The upper Neretva is one of the iconic Dinaric limestone rivers — fast, cold, turquoise karst water descending through Herzegovina.

Warm — handle with careBrown Trout are stressed by warm water — handle every fish carefully.

Water estimated at about 20°C from air temperature — there is no water-temp gauge here, so treat the figure as a guide. Above 18°C, the risk of killing a released fish climbs. Fish dawn or dusk only — the water can be two or three degrees cooler at first light. Barbless hooks. Land it fast — under thirty seconds. Wet hands. No air shots. If a fish swims off slowly or rolls, stop fishing for the day.

DepthShaded riffles, deep pools, spring inflows, cold tributary mouths. Work them and move on.
TimingDawn and dusk only. Avoid the middle of the day — the water peaks then and the fish are most stressed.

Marginallive now

Slow going — pick your moments

Low and clear — careful approach country. Cover and shadow are doing the work today.

80% confidence

Notify when prime

What moved it

LevelDry recentlyNo gauge reading
Water temp20.0°C
ClarityClear

Today’s fly

CDC Emerger16-20

Proven pattern for this period

Rules at a glance

Day tickets
Fly only

Live now

Conditions on the water

Estimate

Trends shown where the gauge supports them

Level

Dry recently

No gauge reading

Water temp

20.0°C

coldwarm

Clarity

Clear

Weather

31°C

Light cloud

Wind

N 6 km/h

calmblown out

Pressure

1020 hPa

lowhigh

Rain · recent

0.4 mm

dryspate risk

Rain · ahead

11.4 mm

dryspate risk

No gauge on this water — readings are regional estimates from weather, not a live gauge.

Water temperature for brown trout

Warm — slow

20°C est.ideal 10–16°C

0°14°28°

How to fish it · for brown trout

When

Nymphing can work through most of the day.

Where

Cover mixed depths.

Method

Start with tight-line nymphs and adjust if fish rise or drift higher.

Kit

9 ft #4 rod, floating line, 12 ft tapered leader to 4–5 lb fluoro tippet.

Why this works

⚠️ Water at 20°C — above the brown trout caution line (18°C). Fish dawn or dusk only. Land it fast, wet hands, no air shots. Otherwise poor — water clarity is in the right range.

Hatch timeline · todayQuiet day

Hatch predictions

Today's headline hatch shown — see all 6 active hatches hour by hour with Pro.

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Evidence

ModelledModerate confidence

Modelled from regional ecology — no survey or occurrence data for this water yet.

Through the year

0–3 scale · July highlighted

Brown Sedge

Freshwater Shrimp

Blue Winged Olive

Mayfly (Green Drake)

Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.

Ranked for today

Brown Trout fly box

Permits & access

Permit required — see local rules.

Bosnia-Herzegovina fishing licence required
Softmouth trout has high conservation status — check current regulations before fishing.

What's coming

Plan ahead

5-day outlook

Water here around 20°C. Nothing cooler within range — carry a thermometer.

About this water

The upper Neretva is one of the iconic Dinaric limestone rivers — fast, cold, turquoise karst water descending through Herzegovina. Home to the endemic softmouth trout (Salmo obtusirostris), brown trout, grayling, and hucho in the deeper pools. Among the most biodiverse salmonid rivers in Europe.

Limestone

The full read · show the working · for brown trout · confidence 80%

How the 28 is built — score × weight = contribution

Temperature25 × 28%7.0

Flow60 × 22%13.2

Clarity95 × 18%17.1

Feeding Time70 × 13%9.1

Pressure80 × 7%5.6

Insect activity61 × 12%7.3

Conditions total= 59

Can you trust it?

Water temperatureair-to-water estimateestimated

Level / flowon-river gaugeobserved

Prey activitymodelled from regional profilemodelled

What would change the calculation

Cooler water — back toward the 10–16 °C ideal band — would lift the score and ease welfare.

Directions

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Related guides

Booking & contacts