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Grundsjön

northern nutrient-rich lowland lake · 65°N
Real lakereal shorelinemeasured max depth 6 msources & method →
clarity 2.4 mmax depth 6 mpH 7.4eutrophicstatus poorpaved road
Fish Grundsjön Buy forecast

Character of the water

Grundsjön lies in the cold north — a northern nutrient-rich lowland lake. In summer a thermocline settles around 6 m and splits the lake into two worlds.

The surroundings

The lake sits close to town with a road right up to it — easy to reach, but hard-fished and exposed to nutrient runoff from the buildings and fields all around.

Moderately deep (6 m) — shallow bays, the odd reef and a deeper channel through the middle.

Permits & rules

Fishing permit required — Grundsjön FVOF. Day permit ~60 kr · annual permit ~300 kr.

  • Zander: minimum size 45 cm · protected during the spawn (Apr–May).
  • Pike: keep at most one over 75 cm per day.
  • Handheld tackle only. Respect the protected zones at the inlets and outlets.

Species in Grundsjön

perch predatory fish
typically ~22 cm · can reach 45 cm
Perch grazes the rich water in schools — where there's one, there are more.
pike predatory fish
typically ~62 cm · can reach 120 cm
In the murky light, pike shadows the baitfish and hits in short rushes.
roach coarse fish
typically ~18 cm · can reach 32 cm
Roach grazes the rich water in schools — where there's one, there are more.
zander predatory fish
typically ~50 cm · can reach 95 cm
In the murky light, zander shadows the baitfish and hits in short rushes.
bream coarse fish
typically ~38 cm · can reach 65 cm
Down on the bottom bream sifts the soft ground — patience beats speed here.
ruffe perch family
typically ~12 cm · can reach 22 cm
Down on the bottom ruffe sifts the soft ground — patience beats speed here.
burbot bottom fish
typically ~45 cm · can reach 90 cm
Burbot works the bottom in the dark — smell and feel come before everything else.

Fishing Grundsjön

perch, pike and zander sit at the top of the food chain in Grundsjön, carried by roach, bream and ruffe. The nutrient-rich water means plenty of baitfish — and predators that grow fat on them.

Every session at Grundsjön is fished in whatever conditions hold right then — the same pressure, wind and light as over the real water. What bites today isn't what bit the day before, and those who return learn the water for real.

General rules of thumb for this kind of water

  • Stratified, oxygen-poor lakes push the fish up above the thermocline in summer.
  • Nutrient-rich lakes hold plenty of baitfish but often murky water.

The catch board

6 anglers · 12 catches
  1. 1Tomas Åströmpike49 cm
  2. 2Heike Nilssonburbot36 cm
  3. 3Tomas Ekbream31 cm
  4. 4Erik Schmidtbream31 cm
  5. 5Emil Petterssonroach15 cm
  6. 6Karin Månssonruffe10 cm
Species records here
pike49 cmTomas Åström
burbot36 cmHeike Nilsson
bream31 cmTomas Ek
roach15 cmEmil Pettersson
ruffe10 cmKarin Månsson
The same water, for real
This water's real catch reports — and the logbook for your own.Fångstrapport.sein SwedishThe real bite table for this water — for your next real session.Huggtabell.sein Swedish