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Reservoir Llyn Clywedog (Powys) — a popular fishing spot. About 2.4 km² in area. Nearest town — Newtown. 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 shoreline is heavily indented — bays, points and spits. Look for pike at the mouths of the bays and on the drop-offs behind the points. The largest water around: all 8 neighbours are smaller.
The wind builds its wave along the north-west — south-east axis — 3 mi of open water; along north-east — south-west there is only 2 mi. When it runs down the main axis, the calm water sits against the bank it blows from, while the wave and the silt go to the far one — and the fish follow them there to feed.
Other nearby places to fish
Other nearby waters
Powys: 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
Green check: this species was recorded here by GBIF. Species without a check may still occur in the waterbody.
Chum one spot near a drop-off and wait for fish to arrive — don't chase them. The water's cold — fish it more delicately and slowly.
Llyn Clywedog — Wednesday, October 21
The bite is weak — fish are sluggish. Pressure is dropping — this usually boosts the bite. Peak 09:00–17:00.
The computed water temperature is around 9 °C — colder than the 14–26 °C comfort range for Bleak: the fish conserves energy and takes more cautiously.
Bleak feeds by day — between 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 a slow season for Bleak: the best months fall at another time of year.
These are the same values the bite curve above was computed from. How the forecast works
Drizzle · feels like 0°
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?Green check: this species was recorded here by GBIF. Species without a check may still occur in the waterbody.
Blue check: this species appears as a catch in reports for this waterbody.
Chum one spot near a drop-off and wait for fish to arrive — don't chase them. The water's cold — fish it more delicately and slowly.
Llyn Clywedog — Wednesday, October 21
The bite is weak — fish are sluggish. Pressure is dropping — this usually boosts the bite. Peak 09:00–17:00.
| fair |
| fair |
| active |
| active |
| active |
| active |
| peak |
| peak |
| peak |
| Dace | slow | slow | fair | active | peak | active | active | active | peak | peak | active | fair |
|---|
| Roach | active | peak | peak | peak | active | fair | fair | fair | fair | active | active | active |
|---|
| Ruffe | slow | slow | fair | active | peak | active | active | active | peak | peak | active | fair |
|---|
| Bream | slow | slow | fair | active | peak | peak | peak | peak | active | active | slow | slow |
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| European eel | slow | slow | fair | active | active | active | active | active | peak | peak | fair | slow |
|---|
| Pike | fair | fair | fair | fair | fair | active | active | active | peak | peak | peak | active |
|---|
| Whitefish | slow | slow | fair | active | peak | peak | active | peak | peak | peak | fair | slow |
|---|
| Zander | fair | fair | fair | fair | fair | active | active | peak | peak | peak | active | active |
|---|
| Brown trout | slow | slow | fair | active | peak | peak | peak | active | active | fair | slow | slow |
|---|
| Rainbow trout | slow | slow | fair | active | peak | peak | active | active | active | fair | slow | slow |
|---|
| White bream | fair | fair | active | peak | peak | active | peak | active | fair | slow | fair | fair |
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| Carp | slow | slow | slow | slow | active | peak | peak | peak | active | slow | slow | slow |
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| Crucian carp | slow | slow | slow | active | peak | active | active | active | fair | slow | slow | slow |
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| Ide | slow | slow | slow | fair | peak | peak | active | active | active | slow | slow | slow |
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| Wels catfish | slow | slow | slow | slow | active | peak | peak | peak | active | slow | slow | slow |
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| Bleak | slow | slow | fair | peak | peak | active | active | fair | fair | slow | slow | slow |
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| Chub | slow | slow | slow | fair | peak | peak | active | active | fair | slow | slow | slow |
|---|
| Rudd | slow | slow | slow | fair | peak | active | active | active | slow | slow | slow | slow |
|---|
| Tench | slow | slow | slow | slow | peak | peak | active | fair | slow | slow | slow | slow |
|---|
Biting
Fish in 1 of 1 report · Mostly Rainbow trout
Anglers have logged 1 fishing report here. Most commonly caught: Rainbow trout. Peak season: June.