Fishing rising and falling water after rain
Rain changes a river or a rain-fed lake in stages: a rise brings colour and washed-in food and can trigger strong feeding; a flood can push fish into the margins or shut them down; a settling, clearing fall after a spate is often one of the most productive phases.
Last reviewed 26 September 2026 · Editorial policy
How to tell what the water is doing
- A river rising and colouring is usually carrying more food than usual, along with worms, insects and debris washed from the banks — fish often feed hard on this early in a rise.
- As a flood peaks, current in the main channel can become too strong for fish to hold in comfortably, pushing them into slacker water at the margins, behind obstructions or into flooded features that are normally dry.
- Once a river starts to drop and clear after a spate, that settling phase is widely regarded by experienced river anglers as one of the best times to fish, particularly for species that feed hard once the current eases and visibility improves a little.
- On stillwaters, heavy rain has a smaller and slower effect, mainly through inflowing streams bringing in coloured, food-rich water near their mouths.
What to change on the rod
Fish the margins and slacks during a flood
Look for water out of the main force of the current — flooded grass, slack bays and the inside of bends — rather than fishing the main flow, which fish are likely to have left.
Heavier weight to hold bottom
Stronger current needs more weight to present a bait or lure where you want it rather than letting it wash through.
Bigger, bolder presentations while it's still coloured
As with any coloured water, size, vibration and scent generally carry further than subtlety while visibility is reduced.
Scale back down as it clears
As a spate settles and clarity returns, many anglers taper down leader strength and bait size to suit the clearer water, while keeping faith in the swim.
Common mistakes
- Fishing the main channel during a flood, where fish have already moved out of the strongest current.
- Packing up as soon as the water colours, missing the early feeding spell that colouring water can trigger.
- Underestimating how fast a river can rise, or wading in conditions that have changed since you arrived.
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Common questions
Is fishing good after rain?
It's often productive, particularly on rivers as they start to settle and clear after a spate, when fish feed hard following the disturbance. Fishing in the middle of a heavy flood is usually harder.
How long should I wait after rain before fishing a river?
There's no fixed number of hours — it depends on the size of the river and the catchment. Watching the level and colour, rather than the clock, is the reliable approach; many rivers fish well as they visibly begin to drop.
Is it safe to fish near rising water?
Take it seriously. Rivers can rise fast even where it isn't raining locally if rain has fallen upstream, banks and gravel can be undercut and unstable, and floodwater carries debris. Keep a clear retreat route, avoid wading in a rising river, and don't fish alone in fast-changing conditions if you can help it.