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Forecast
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United Kingdom / Orkney Islands / Loch of Harray / Brown trout

Brown trout fishing at Loch of Harray

29 verified Brown trout catches are linked to Loch of Harray. The forecast below uses this waterbody and current weather data.

Brown trout bite forecast today

Hourly activity and a seven-day calendar for Brown trout.

Brown trout bite calendar

Wednesday, September 2

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

Hourly activity

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

The bite is strong — fish are active. Pressure is rising — activity tends to be more subdued.

Peak bite hours

Best time — 06:00–08:00 (dawn bite) and 20:00–22:00 (dusk bite).

Tactics

Look for drop-offs and gaps in the weeds, retrieve slowly, lingering over promising spots.

Lures

The water's turning murky — go with bright, noisy lures: spinner or small crankbait.

Gear

Pack transitional-season clothing — mornings and evenings are chilly. Rain is expected — don't forget a rain jacket or a waterproof shell.

Summary

Worth going — it's a productive day.

Why this forecast

The computed water temperature is around 12 °C — inside the 6–17 °C comfort range for Brown trout, so baseline activity is high.

Computed water temperature by month; the green band is the 6–17 °C comfort rangecomfort 6–17 °C12 °C
JFMAMJJASOND

Brown trout 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 Brown trout feeds0:0012:0024:00

Pressure is dropping 2 hPa over the day — fish are usually more active ahead of a weather change.

Pressure through the day, 2 hPa change
00:00 · 101123:00 · 1009 hPa

September is an active season for Brown trout here.

JFMAMJJASOND

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

2 SepWednesday, September 2
+13°

Clear · feels like +9°

Low / high
+9°…+13°
Precipitation
0.0 mm
Wind
10 mph WNW
Cloud cover
9%
Humidity
59%
Pressure
1014 hPa
00:00+11°—13 mphnorthwest wind, 13 mph79%98%
01:00+10°0.1 mm11 mphnorthwest wind, 11 mph80%59%
02:00+10°0.1 mm9 mphwest wind, 9 mph80%0%
03:00+10°0.1 mm9 mphwest wind, 9 mph82%11%
04:00+9°—9 mphwest wind, 9 mph84%60%
05:00+9°—10 mphnorthwest wind, 10 mph75%2%
06:00+9°—9 mphwest wind, 9 mph78%88%
07:00+9°—8 mphwest wind, 8 mph75%84%
08:00+10°—6 mphwest wind, 6 mph73%90%
09:00+11°—9 mphnorthwest wind, 9 mph67%18%
10:00+12°—11 mphnorthwest wind, 11 mph62%63%
11:00+12°—11 mphnorthwest wind, 11 mph60%52%
12:00+13°—10 mphnorthwest wind, 10 mph59%9%
13:00+13°—10 mphwest wind, 10 mph54%12%
14:00+13°—10 mphwest wind, 10 mph53%32%
15:00+13°—9 mphnorthwest wind, 9 mph54%16%
16:00+13°—6 mphwest wind, 6 mph55%23%
17:00+12°—4 mphnorthwest wind, 4 mph57%25%
18:00+12°—4 mphnorth wind, 4 mph59%0%
19:00+11°—3 mpheast wind, 3 mph72%1%
20:00+9°—6 mphsoutheast wind, 6 mph81%0%
21:00+9°—6 mphsoutheast wind, 6 mph74%11%
22:00+10°—7 mphsoutheast wind, 7 mph79%15%
23:00+11°—10 mphsoutheast wind, 10 mph80%100%
+13°+11°+9°
Weather throughout the day
0:006:0012:0018:0023:00

Sun and moon

Wednesday, September 2
The day: daylight and the hours the moon is above the horizon. Local time0:0012:0024:00
DaylightMoon above the horizon
Sunrise
06:11
Sunset
20:10
Day length
13 h 59 min
Sunshine hours
10 h 35 min
UV index
3
moderate
Moon
Waning gibbous
Moonrise
20:33
Moonset
14:00

The day is 5 min shorter than yesterday.

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

Solunar feeding periods

+12% in the windowWednesday, September 2
Feeding windows on the day scale, local time0:0012:0024:00
Major periodsMinor periods
  • Major03:56–05:56Moon overhead
  • Minor13:30–14:30Moonset
  • Major16:23–18:23Moon underfoot
  • Minor20:03–21:03Moonrise

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?

Catches

Recorded 29 catches here. Most commonly caught: Brown trout. Peak season: July.

  • Brown trout
    Loch of Harray
    19 °C9 mph
    Jul 11, 2022, 12:24 PM

BiteGuide·From anglers’ reports

What actually worked on this water

Brown troutBased on 29 verified catchesPeriod: 2017–2022

This is a summary of anglers' reports, not a proven cause of the bite: conditions lining up does not mean they drove it.

By time of day

vertical axis — number of catches

047
44375321
1112131415161718
By time of day
ValueCatchesShare
11:00414%
12:00414%
13:00310%
14:00724%
15:00517%
16:00310%
17:0027%
18:0013%

Air temperature, °C

vertical axis — number of catches

0917
1712
1015
Air temperature, °C
ValueCatchesShare
10–14 °C1759%
15–19 °C1241%

Pressure, mmHg

vertical axis — number of catches

0917
1712
760765
Pressure, mmHg
ValueCatchesShare
760–764 mmHg1759%
765–769 mmHg1241%

Wind direction

vertical axis — number of catches

047
2576324
NNEESESSWNW
Wind direction
ValueCatchesShare
N27%
NE517%
E724%
SE621%
S310%
SW27%
NW414%

Wind speed, mph

vertical axis — number of catches

0714
6149
049
Wind speed, mph
ValueCatchesShare
0–2 mph621%
4–7 mph1448%
9–11 mph931%

About Loch of Harray

Loch of Harray (Orkney Islands) — a popular fishing spot. About 9.9 km² in area. The town of Kirkwall is nearby. Species found here: brown trout. A smart bite calendar — moon phase, atmospheric pressure, and weather combined into an hourly fish-activity forecast for the coming days.

Loch of HarrayOrkney IslandsBrown trout guide
Brown trout
Loch of Harray
19 °C9 mph
Jul 11, 2022, 11:58 AM
  • Brown trout
    Loch of Harray
    19 °C9 mph
    Jul 11, 2022, 10:36 AM
  • Brown trout
    Loch of Harray
    15 °C4 mph
    Jul 23, 2021, 3:42 PM
  • Brown trout
    Loch of Harray
    14 °C4 mph
    Jul 23, 2021, 1:41 PM
  • Brown trout
    Loch of Harray
    14 °C4 mph
    Jul 23, 2021, 1:41 PM
  • Brown trout
    Loch of Harray
    14 °C4 mph
    Jul 23, 2021, 1:40 PM
  • Brown trout
    Loch of Harray
    14 °C4 mph
    Jul 23, 2021, 1:19 PM