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Forecast
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© 2026·AI-powered bite forecast
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United Kingdom / Orkney Islands / Loch of Harray

Bite forecast: Loch of Harray

  • 9.9 km²
Loading map…

Best fishing days for the next week

  1. WednesdaySeptember 2weather-based forecast
    70/100high activity

    Clear: 9–13 °C

Nearby water bodies

  • LakeLoch of Stenness2 mi
  • LakeLoch of Bosquoy2 mi
  • LakeLoch of Clumly2 mi
  • LakeMill Dam of Rango2 mi
  • LakeLoch of Skaill3 mi
  • LakeLoch of Wasdale3 mi
  • LakeLoch of Sabiston4 mi
  • ReservoirStromness Reservoir4 mi
  • BayThe Ouse4 mi
  • LakeLoch of Banks5 mi

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

Fish biting at this waterbody

Choose a fish to see its hourly forecast, catches and BiteGuide.

  • Brown trout

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
  • 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
Loading map…
SundaySeptember 6weather-based forecast
67/100high activity

Cloudy: 12–14 °C

  • ThursdaySeptember 3weather-based forecast
    63/100high activity

    Partly cloudy: 14–17 °C

  • Nearby towns

    • Kirkwall8 mi

    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?
    BreamWels catfishCarpWhite breamBrown troutChubCrucian carpDaceIdeWhitefishZanderEuropean eelPikeRuddRuffeTenchBleakPerchRainbow troutRoach

    Bleak

    6/10 · Fair

    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 — 11:00–17:00 (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. In cold or murky water, add scent to your chum.

    Gear

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

    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 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

    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

    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?

    BiteGuide·From anglers’ reports

    What actually worked on this water

    Based 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%