Did not find what you were looking for, or something looks wrong? Tell us — we read every message.
Rhymney River (Caerphilly County Borough) — a spot well known among anglers. About 42 km long. Flows into Bristol Channel. Nearby towns: Rhymney, New Tredegar and Caerphilly. This page shows an hourly bite forecast for today and the week ahead; the algorithm factors in the weather, atmospheric pressure, and the moon phase.
Nearest towns and cities
The course is moderately sinuous: pools are scoured at the bends and riffles run between them. Longer than 12 of the 16 rivers nearby.
Caerphilly County Borough: the months when each species peaks and when it goes quiet. The current month is outlined.
| Fish | January | February | March | April | May | June | July | August | September | October | November | December |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Perch | active | active |
Wednesday, October 21
Work the cover — snags, weed edges, hole entrances; retrieve the lure with pauses.
Rhymney River — Wednesday, October 21
The bite is moderate — fish feed in short bursts. Pressure is dropping — this usually boosts the bite. Peak 08:00–09:00 and 18:00–19:00.
The computed water temperature is around 11 °C — inside the 4–14 °C comfort range for Atlantic salmon, so baseline activity is high.
Atlantic salmon works the twilight: the peaks are pinned to sunrise and sunset — their times are in the sun-and-moon card above.
Pressure is rising 8 hPa over the day — the bite usually settles down after a rise.
One more input — the moon's feeding windows: within their hours the score sits higher than across the rest of the day. The window times are in the “Solunar feeding periods” card below.
October is an average month for Atlantic salmon here.
These are the same values the bite curve above was computed from. How the forecast works
Rain · feels like +1°
The day is 4 min shorter than yesterday.
Sunshine hours count direct sun only — cloud cover cuts it, so it is shorter than daylight.
Geomagnetic fieldG1 geomagnetic storm, Kp 4.7
Kp index — NOAA data. Not part of the bite score: catches show no link between geomagnetic storms and the bite.
The windows are set by the moon's transit and rise, and the forecast above already accounts for them: within these hours the bite score sits higher than across the rest of the day, while the day's overall level still comes from the catch-calibrated model.
What are solunar periods?Blue check: this species appears as a catch in reports for this waterbody.
Work the cover — snags, weed edges, hole entrances; retrieve the lure with pauses.
Rhymney River — Wednesday, October 21
The bite is moderate — fish feed in short bursts. Pressure is dropping — this usually boosts the bite. Peak 08:00–09:00 and 18:00–19:00.
| fair |
| fair |
| active |
| active |
| active |
| active |
| peak |
| peak |
| peak |
| Dace | slow | fair | active | peak | peak | active | active | peak | peak | peak | active | fair |
|---|
| Grayling | slow | fair | active | peak | peak | active | active | peak | peak | peak | active | fair |
|---|
| Ruffe | slow | fair | active | peak | peak | active | active | peak | peak | peak | active | fair |
|---|
| Roach | active | peak | peak | peak | active | fair | fair | fair | fair | active | active | active |
|---|
| Whitefish | slow | fair | active | active | peak | active | active | peak | peak | active | fair | slow |
|---|
| Barbel | slow | slow | fair | active | active | active | active | peak | peak | active | fair | slow |
|---|
| European eel | slow | slow | fair | active | active | active | active | peak | peak | active | fair | slow |
|---|
| Pike | fair | fair | fair | fair | fair | active | active | peak | peak | peak | active | active |
|---|
| Zander | fair | fair | fair | fair | fair | active | active | peak | peak | peak | active | active |
|---|
| Atlantic salmon | slow | slow | fair | active | peak | peak | active | active | active | fair | slow | slow |
|---|
| Bream | slow | slow | fair | active | peak | peak | peak | peak | active | fair | slow | slow |
|---|
| Brown trout | slow | slow | fair | active | peak | peak | peak | active | active | slow | slow | slow |
|---|
| Rainbow trout | slow | slow | fair | active | peak | peak | active | active | active | fair | slow | slow |
|---|
| White bream | fair | fair | active | peak | peak | active | active | active | fair | slow | fair | fair |
|---|
| Bleak | slow | slow | active | peak | peak | active | active | fair | fair | slow | slow | slow |
|---|
| Chub | slow | slow | fair | active | peak | peak | active | active | fair | slow | slow | slow |
|---|
| Crucian carp | slow | slow | fair | active | peak | active | active | active | fair | slow | slow | slow |
|---|
| Ide | slow | slow | fair | active | peak | peak | active | active | fair | slow | slow | slow |
|---|
| Carp | slow | slow | slow | fair | active | peak | peak | peak | fair | slow | slow | slow |
|---|
| Rudd | slow | slow | slow | active | peak | active | active | fair | slow | slow | slow | slow |
|---|
| Tench | slow | slow | slow | active | peak | active | active | fair | slow | slow | slow | slow |
|---|
| Wels catfish | slow | slow | slow | fair | active | peak | peak | peak | fair | slow | slow | slow |
|---|
Other nearby places to fish
Other nearby waters
Biting
Fish in 3 of 3 reports · Mostly Brown trout
Anglers have logged 3 fishing reports here. Most commonly caught: Brown trout, Grayling. Peak season: August–November.