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© 2026·AI-powered bite forecast
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United Kingdom / Powys / River Afon Eiddew

Bite forecast: River Afon Eiddew

  • length 7 km
Loading map…

Best fishing days for the next week

  1. SundaySeptember 6weather-based forecast
    63/100high activity

    Cloudy: 12–19 °C

  2. WednesdaySeptember 9weather-based forecast
    62/100high activity

    Partly cloudy: 7–13 °C

  3. ThursdaySeptember 3weather-based forecast
    60/100high activity

    Cloudy: 15–19 °C

River Afon Eiddew (Powys) — one of the area's fishing spots. About 7 km long. A smart bite calendar — moon phase, atmospheric pressure, and weather combined into an hourly fish-activity forecast for the coming days.

Loading map…

Bite calendar

Aug 31 – Sep 6
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Bite activity:highmediumlowslow
Based on:weatherseasonal
What is a bite calendar?

In the fish list, this icon marks species recorded here by GBIF. Unmarked species may still occur in the waterbody.

DaceEuropean eelWhitefishBarbelWels catfishGraylingPikeRuffeZanderBreamCarpPerchAtlantic salmonBrown troutCrucian carpIdeRainbow troutBleakChubRoachRuddWhite breamTench

Atlantic salmon

6/10 · Fair

Hourly activity

0:006:0012:0018:0023:00
Bite activity:highmediumlow

The bite is strong — fish are active. Weather is steady, with no sharp swings — fish behave predictably.

Peak bite hours

Best time — 06:00–08:00 (dawn bite) and 19:00–21:00 (dusk bite).

Tactics

Work the cover — snags, weed edges, hole entrances; retrieve the lure with pauses.

Lures

The water's turning murky — go with bright, noisy lures: salmon spoon or salmon fly.

Gear

Pack transitional-season clothing — mornings and evenings are chilly. Winds will be strong — wind protection helps, and be careful if you're in a boat.

Summary

Worth going — it's a productive day.

How this forecast is calculated

Why this forecast

The computed water temperature is around 14 °C — warmer than the 4–14 °C comfort range for Atlantic salmon: in the heat it drops deeper and feeds less often.

Computed water temperature by month; the green band is the 4–14 °C comfort rangecomfort 4–14 °C14 °C
JFMAMJJASOND

Atlantic salmon works the twilight: the peaks are pinned to sunrise and sunset — their times are in the sun-and-moon card above.

The day: daylight hours and when Atlantic salmon feeds0:0012:0024:00

Pressure is dropping 9 hPa over the day — fish are usually more active ahead of a weather change.

Pressure through the day, 9 hPa change
00:00 · 101923:00 · 1009 hPa

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.

Feeding windows on the day scale0:0012:0024:00

September is an active season for Atlantic salmon here.

JFMAMJJASOND

These are the same values the bite curve above was computed from. How the forecast works

6 SepSunday, September 6
+18°

Cloudy · feels like +16°

Low / high
+12°…+19°
Precipitation
0.0 mm
Wind
17 mph SSW
Cloud cover
99%
Humidity
83%
Pressure
1012 hPa
00:00+13°—10 mphsouth wind, 10 mph85%12%
01:00+13°—11 mphsouth wind, 11 mph87%3%
02:00+13°—11 mphsouth wind, 11 mph88%1%
03:00+12°—11 mphsouth wind, 11 mph89%3%
04:00+12°—11 mphsouth wind, 11 mph90%5%
05:00+12°—11 mphsouth wind, 11 mph91%1%
06:00+12°—11 mphsouth wind, 11 mph91%0%
07:00+13°—11 mphsouth wind, 11 mph91%3%
08:00+14°—12 mphsouth wind, 12 mph89%31%
09:00+16°—13 mphsouth wind, 13 mph86%69%
10:00+17°—14 mphsouth wind, 14 mph84%97%
11:00+18°—15 mphsouth wind, 15 mph83%100%
12:00+18°—17 mphsouth wind, 17 mph83%99%
13:00+19°—18 mphsouthwest wind, 18 mph83%95%
14:00+19°—18 mphsouthwest wind, 18 mph82%94%
15:00+19°—18 mphsouthwest wind, 18 mph82%94%
16:00+19°—18 mphsouthwest wind, 18 mph82%94%
17:00+18°—17 mphsouthwest wind, 17 mph84%96%
18:00+18°—16 mphsouthwest wind, 16 mph87%99%
19:00+18°—16 mphsouthwest wind, 16 mph89%100%
20:00+17°—15 mphsouthwest wind, 15 mph91%99%
21:00+17°—14 mphsouthwest wind, 14 mph92%96%
22:00+17°—14 mphsouthwest wind, 14 mph93%94%
23:00+17°—13 mphsouthwest wind, 13 mph94%94%
+19°+15°+12°
Weather throughout the day
0:006:0012:0018:0023:00

Sun and moon

Sunday, September 6
The day: daylight and the hours the moon is above the horizon. Local time0:0012:0024:00
DaylightMoon above the horizon
Sunrise
06:32
Sunset
19:49
Day length
13 h 17 min
Sunshine hours
12 h 44 min
UV index
4
moderate
Moon
Waning crescent
Moonrise
—
Moonset
18:04

The day is 4 min shorter than yesterday.

Sunshine hours count direct sun only — cloud cover cuts it, so it is shorter than daylight.

Solunar feeding periods

+13% in the windowSunday, September 6
Feeding windows on the day scale, local time0:0012:0024:00
Major periodsMinor periods
  • Major08:00–10:00Moon overhead
  • Minor17:34–18:34Moonset
  • Major20:31–22:31Moon underfoot

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?

Nearby rivers

  • Afon Nadroedd0.9 mi
  • Eunant1 mi
  • Cwm-yr-Halo2 mi
  • Afon Cedig2 mi
  • Hirnant4 mi
  • River Cownwy4 mi
  • Afon Eirth4 mi
  • Nant Rhyd-wen5 mi
  • River Eirth5 mi
  • Afon Glyn6 mi

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