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© 2026·AI-powered bite forecast
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Ireland / County Wicklow / Upper Lough Bray

Bite forecast: Upper Lough Bray

  • 13 ha
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Best fishing days for the next week

  1. ThursdaySeptember 10weather-based forecast
    73/100high activity

    Partly cloudy: 8–15 °C

  2. MondaySeptember 7weather-based forecast
    69/100high activity

    Partly cloudy: 10–15 °C

  3. TuesdaySeptember 8weather-based forecast
    64/100high activity

    Drizzle: 8–13 °C

Nearby towns

  • Bray8 mi
  • Blessington10 mi
  • Greystones10 mi

Upper Lough Bray (County Wicklow) — a spot well known among anglers. About 13 ha in area. Close by — Bray, Blessington and Greystones. A smart bite calendar — moon phase, atmospheric pressure, and weather combined into an hourly fish-activity forecast for the coming days.

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Bite calendar

Saturday, September 5

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

Bleak

4/10 · Weak

Hourly activity

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

The bite is moderate — fish feed in short bursts. Pressure is rising — activity tends to be more subdued.

Peak bite hours

Best time — 11:00–16:00 (daytime activity).

Tactics

Chum one spot near a drop-off and wait for fish to arrive — don't chase them.

Lures

Today's bait — maggot or small hook with dough bait.

Gear

Pack transitional-season clothing — mornings and evenings are chilly.

Summary

An average day — best chances during peak windows.

How this forecast is calculated

Why this forecast

The computed water temperature is around 12 °C — colder than the 14–26 °C comfort range for Bleak: the fish conserves energy and takes more cautiously.

Computed water temperature by month; the green band is the 14–26 °C comfort rangecomfort 14–26 °C12 °C
JFMAMJJASOND

Bleak feeds by day — between sunrise and sunset; their times are in the sun-and-moon card above.

The day: daylight hours and when Bleak feeds0:0012:0024:00

Pressure is rising 3 hPa over the day — the bite usually settles down after a rise.

Pressure through the day, 3 hPa change
00:00 · 101923:00 · 1023 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 average month for Bleak here.

JFMAMJJASOND

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

5 SepSaturday, September 5
+13°

Partly cloudy · feels like +11°

Low / high
+10°…+16°
Precipitation
0.0 mm
Wind
7 mph SW
Cloud cover
61%
Humidity
70%
Pressure
1024 hPa
00:00+11°—8 mphwest wind, 8 mph89%74%
01:00+10°—8 mphwest wind, 8 mph90%84%
02:00+10°—8 mphwest wind, 8 mph89%98%
03:00+10°—6 mphwest wind, 6 mph90%80%
04:00+10°—9 mphwest wind, 9 mph91%54%
05:00+10°—9 mphwest wind, 9 mph91%50%
06:00+10°—7 mphwest wind, 7 mph92%23%
07:00+10°—5 mphsouthwest wind, 5 mph93%78%
08:00+10°—5 mphwest wind, 5 mph90%67%
09:00+11°—6 mphwest wind, 6 mph85%45%
10:00+12°—5 mphsouthwest wind, 5 mph80%85%
11:00+12°—6 mphsouthwest wind, 6 mph79%84%
12:00+13°—7 mphsouthwest wind, 7 mph70%61%
13:00+14°—7 mphsouthwest wind, 7 mph68%77%
14:00+15°—8 mphsouthwest wind, 8 mph63%63%
15:00+15°—8 mphsouthwest wind, 8 mph60%62%
16:00+16°—8 mphsouthwest wind, 8 mph58%41%
17:00+15°—10 mphsouthwest wind, 10 mph62%28%
18:00+14°—10 mphsouthwest wind, 10 mph66%100%
19:00+13°—11 mphsouth wind, 11 mph73%88%
20:00+13°—9 mphsouth wind, 9 mph81%100%
21:00+12°—8 mphsouth wind, 8 mph81%98%
22:00+12°—11 mphsouth wind, 11 mph83%86%
23:00+13°—11 mphsouth wind, 11 mph87%100%
+16°+13°+10°
Weather throughout the day
0:006:0012:0018:0023:00

Sun and moon

Saturday, September 5
The day: daylight and the hours the moon is above the horizon. Local time0:0012:0024:00
DaylightMoon above the horizon
Sunrise
06:42
Sunset
20:04
Day length
13 h 22 min
Sunshine hours
9 h 29 min
UV index
3
moderate
Moon
Waning crescent
Moonrise
23:51
Moonset
17:27

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 windowSaturday, September 5
Feeding windows on the day scale, local time0:0012:0024:00
Major periodsMinor periods
  • Major07:06–09:06Moon overhead
  • Minor16:57–17:57Moonset
  • Major19:37–21:37Moon underfoot
  • Minor23:21–00:00Moonrise

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

  • Glencree1 mi
  • Glencullen River4 mi
  • Owendoher River4 mi
  • Dargle4 mi
  • Liffey5 mi
  • Owendoher5 mi
  • Shankill River5 mi
  • Cookstown River5 mi
  • Glendoo Brook5 mi
  • Cloghoge6 mi

Nearby water bodies

  • LakeLower Lough Bray0.6 mi
  • ReservoirBohernabreena Reservoir Upper4 mi
  • LakeLough Tay5 mi
  • ReservoirBohernabreena Reservoir Lower5 mi
  • LakeCleevaun Lough6 mi