Gammarids
- Ecology: Good
- Chemical: Unknown
WFD classification · ES017MSPFES002MAR002380
Rules at a glance
- Public water
- Licence required
Water temperature for Sea Trout
Ideal13°C est.ideal 8–15°C
0°14°28°
How to fish it · for Sea Trout
When
From dusk into the first half of the night.
Where
Deeper pools and slower glides · hold water and current seams.
Method
Fish dark patterns on a sink-tip or lightly sunk line, especially near structure.
Kit
10 ft #6/7 rod, floating line with a sink-tip option, 8–10 lb fluoro tippet for the swing.
Likely species
Hatch timeline · todayQuiet day
Hatch predictions
Today's headline hatch shown — see all 12 active hatches hour by hour as a supporter.
Start free trial14-day free trial. Cancel anytime.
Sub-surface · on the nymphunder the surface
Hatch predictions
Supporters see the full sub-surface read.
Start free trial14-day free trial. Cancel anytime.
Evidence
Survey-backed · regionalHigh confidence
Backed by regional invertebrate surveys; no sampling on this exact reach yet.
Through the year
0–3 scale · October highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
1
Daddy Long LegsHatch
2
3
2
Evening SedgeHatch
2
3
3
3
2
Large Dark OliveHatch
1
2
2
1
Iron BlueHatch
1
2
2
2
2
2
2
1
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Ranked for today
Fly box · Sea Trout
Top
1-2 inch · Tube
In deep pools and dark water, silhouette and contrast do the work colour cannot. A fly that reads as black against depth is enough. Fish it broadside, hold the swing, let it hang at the dangle — that is when the best fish take.
8-12 · Streamer
Slim and mobile — fished sunk through the pool when surface work is not producing. Consistently takes fish that will not come to the surface.
2-4 inch · Streamer
A mobile eel-like profile that undulates through deep pools — effective when sea trout are lying deep and not responding to conventional wets.
Permits & access
Permit required — see local rules.
- Gobierno de Navarra fishing licence required
- Border-water and named-stretch rules matter here, so check the exact tramo and permit structure before travel
- Do not treat this as a salmon-planning venue.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Gallery · 2
Terrain map
Water quality (WFD)
Why this score · for Sea Trout
- Temperature10028% weight
- Flow8022% weight
- Clarity8518% weight
- Feeding Time10013% weight
- Pressure857% weight
- Insect activity5512% weight
Directions
Seasons & zones
- Trout 1 May → 30 June
RSS Baztan–Bidasoa basin (9,898 permits in 2026 — largest allocation in Navarra). All catch-and-release. Extendable to 15 Jul by resolution. Daily basin permit required. IMPORTANT: the Tramo Salmonero (presa de Fundiciones de Bera to Endarlatsa) is CLOSED for all of 2026 — this entry covers trout fishing in the broader Baztan–Bidasoa basin, not the salmon beat.
Sea trout: Variable seasonal (2026)
Related guides
Booking & contacts
Bidasoa tributaries (Navarra side)
Water temperature for Sea Trout
Ideal13°C est.ideal 8–15°C
0°14°28°
How to fish it · for Sea Trout
When
From dusk into the first half of the night.
Where
Deeper pools and slower glides · hold water and current seams.
Method
Fish dark patterns on a sink-tip or lightly sunk line, especially near structure.
Kit
10 ft #6/7 rod, floating line with a sink-tip option, 8–10 lb fluoro tippet for the swing.
Likely species
Hatch timeline · todayQuiet day
Hatch predictions
Today's headline hatch shown — see all 12 active hatches hour by hour as a supporter.
Start free trial14-day free trial. Cancel anytime.
Sub-surface · on the nymphunder the surface
Hatch predictions
Supporters see the full sub-surface read.
Start free trial14-day free trial. Cancel anytime.
Evidence
Survey-backed · regionalHigh confidence
Backed by regional invertebrate surveys; no sampling on this exact reach yet.
Through the year
0–3 scale · October highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
1
Daddy Long LegsHatch
2
3
2
Evening SedgeHatch
2
3
3
3
2
Large Dark OliveHatch
1
2
2
1
Iron BlueHatch
1
2
2
2
2
2
2
1
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Ranked for today
Fly box · Sea Trout
Top
1-2 inch · Tube
In deep pools and dark water, silhouette and contrast do the work colour cannot. A fly that reads as black against depth is enough. Fish it broadside, hold the swing, let it hang at the dangle — that is when the best fish take.
8-12 · Streamer
Slim and mobile — fished sunk through the pool when surface work is not producing. Consistently takes fish that will not come to the surface.
2-4 inch · Streamer
A mobile eel-like profile that undulates through deep pools — effective when sea trout are lying deep and not responding to conventional wets.
Permits & access
Permit required — see local rules.
- Gobierno de Navarra fishing licence required
- Border-water and named-stretch rules matter here, so check the exact tramo and permit structure before travel
- Do not treat this as a salmon-planning venue.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Gallery · 2
Terrain map
Water quality (WFD)
- Ecology: Good
- Chemical: Unknown
WFD classification · ES017MSPFES002MAR002380
Why this score · for Sea Trout
- Temperature10028% weight
- Flow8022% weight
- Clarity8518% weight
- Feeding Time10013% weight
- Pressure857% weight
- Insect activity5512% weight
Directions
Seasons & zones
- Trout 1 May → 30 June
RSS Baztan–Bidasoa basin (9,898 permits in 2026 — largest allocation in Navarra). All catch-and-release. Extendable to 15 Jul by resolution. Daily basin permit required. IMPORTANT: the Tramo Salmonero (presa de Fundiciones de Bera to Endarlatsa) is CLOSED for all of 2026 — this entry covers trout fishing in the broader Baztan–Bidasoa basin, not the salmon beat.
Sea trout: Variable seasonal (2026)
Related guides
Booking & contacts