The Grey is the great river of its West Coast valley — a big spate river holding strong brown trout in its runs and clearer tributaries. Like all West Coast water it lives by the weather: after rain it runs high and coloured, and as it falls and clears toward normal it switches on. The tributaries clear first and offer the early option.
The Grey — Māwheranui — gathers the rain of the Southern Alps and the Paparoa Range and runs broad and powerful through the Grey valley to the sea at Greymouth, a big West Coast river of long runs and bush-lined reaches. Strong brown trout hold its runs and the clearer tributaries, in high-rainfall country where the river rises and falls fast.
Wading: Big spate river, fast rises after rain, slick gravel — read the level
Practical guides describe green beetles in early summer giving way to cicadas from late summer on the fishable middle and upper reaches — broad seasonal guidance from secondary sources, not measured insect counts.
- River
- Mixed sedimentary
- Partly confined
- Large river
- Pool riffle