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More Fog Hunter in Trossachs & Loch Lomond
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Rule Fog Hunter

Ben A'an - Fog Hunter - Trossachs & Loch Lomond

Callander, Scotland, United Kingdom

Thick, moody fog for atmospheric forest and landscape shots

No opportunities right now
Here’s what usually blocks matches

No Fog Hunter opportunities in the next 14 days

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Rule requirements (key thresholds)
Fog Probability · ≥ 60.0%

Tip: Scroll down to the 72-hour table to see exactly which condition fails hour by hour.

Most common blockers (next 72 hours)
Fog Probability 100% failing

Currently

Real-time conditions
Fog Probability
13%
Dewpoint Spread0.9°C
Visibility19787 (Clear)
Relative Humidity94%
Wind Speed4.0m/s (calm conditions)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/London

No opportunities in the next 10 days

See the blocker timeline below to understand which conditions are preventing matches.

What this forecast looks for

Plain-language explanation from the rule

This forecast identifies when fog and mist conditions create atmospheric photography opportunities across the Trossachs lochs and glens. We track temperature, humidity, wind, and overnight cooling to predict when dawn mist will form over forest-fringed lochs and settle into wooded valleys.

The Trossachs—"the Highlands in miniature"—sits where Lowland Scotland meets the Highlands, creating perfect conditions for mist formation. Cool Highland air draining down valleys meets warmer air over the lochs, while dense oak and birch forests trap moisture overnight. The result is frequent dawn mist that transforms intimate lochs and wooded glens into scenes of ethereal beauty.

What makes the Trossachs special for fog photography:

  • Forest-fringed lochs - Loch Ard and Loch Chon with native woodland creating layered mist scenes
  • Valley fog formation - Glen Finglas and other glens trap overnight mist between mountains
  • Intimate scale - Smaller lochs allow compositions that capture both mist and reflections
  • Seasonal reliability - Autumn (September-November) brings most reliable mist conditions with calm nights

Loch Ard near Aberfoyle offers the Trossachs' most reliable dawn mist—native forest comes right to the water's edge, creating layered compositions as mist rises through trees. The forest pier at dawn with mist swirling around ancient oaks is magical. Loch Chon, deeper into the forest, sees even more atmospheric conditions due to its remote, sheltered position. The Trossachs Pier on Loch Katrine with the historic steamship and Ben Venue emerging from mist creates classic Scottish landscape scenes. Timing is critical—arrive in darkness, position yourself 30 minutes before sunrise, and capture the 1-2 hour window as mist lifts and breaks. Conditions change rapidly once sun hits the water.

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72-hour requirements breakdown

What passed or failed, hour by hour
0matching hours in the next 93 hours
AND logic: all conditions required
Meets requirement
Misses requirement
Time
Europe/London
Fog Probability
≥ 60.0%
Wed, Apr 15
05:000%
06:000%
07:000%
08:000%
09:000%
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11:000%
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Thu, Apr 16
24:000%
01:000%
02:0011%
03:0013%
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Fri, Apr 17
24:000%
01:000%
02:0044%
03:0036%
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06:000%
07:000%
08:000%
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Sat, Apr 18
24:000%
01:000%
02:000%
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21:000%
22:0043%
23:0043%
Sun, Apr 19
24:0043%
01:0043%
How to read: colored cells show whether each predicate requirement is met; highlighted rows mean the full rule matched (an opportunity).

What does Fog Probability mean?

Inputs that drive the score

This derived score summarizes multiple raw weather signals. The table below shows the supporting inputs hour by hour, so you can see what's pushing the score up or down.

Time
Europe/London
Clear Sky Probability (Ensemble)
%
Dew Point
°C
Rainfall
mm
Relative Humidity
%
Snowfall
cm
Solar Elevation
°
Temperature
°C
Total Precipitation
mm
Vapor Pressure Deficit
kPa
Visibility
m
Wind Gusts
m/s
Wind Speed
m/s
Thu, Apr 16 Sunrise 06:08 Sunset 20:25
03:00 ☾
0% 5°C 0.01mm 94% 0cm -20° 5.9°C 0.75mm 0.06kPa 19787m 9.9m/s 4m/s
04:00 ☾
0% 4.8°C 0.1mm 93% 0cm -16° 5.8°C 1mm 0.06kPa 17495m 10m/s 5.9m/s
05:00 ☾
0% 4.6°C 4.3mm 97% 0cm -9.3° 5.1°C 3.3mm 0.03kPa 1942m 9.8m/s 3.6m/s
06:00 ☾
0% 4.9°C 0.23mm 96% 0cm -1.8° 5.5°C 5.2mm 0.04kPa 8979m 8.7m/s 3.2m/s
07:00
0% 4.8°C 0.2mm 93% 0cm 6.3° 5.8°C 5.4mm 0.06kPa 16818m 12m/s 4.4m/s
08:00
0% 4.4°C 0mm 89% 0cm 14° 6.1°C 0.13mm 0.11kPa 24135m 13m/s 7.2m/s
09:00
0% 4.1°C 0mm 87% 0cm 23° 6.1°C 0.19mm 0.12kPa 24134m 13m/s 6.9m/s
10:00
0% 4.1°C 0mm 86% 0cm 30° 6.3°C 0.19mm 0.13kPa 24134m 13m/s 7.1m/s
11:00
0% 4.7°C 0mm 82% 0cm 37° 7.5°C 0.25mm 0.18kPa 24134m 12m/s 6.8m/s
12:00
0% 5°C 0mm 75% 0cm 42° 9.2°C 0.38mm 0.29kPa 20679m 12m/s 8m/s
13:00
0% 5.2°C 0mm 76% 0cm 44° 9.3°C 0.56mm 0.28kPa 23257m 11m/s 7.4m/s
14:00
8% 4.6°C 0mm 68% 0cm 43° 10°C 0.13mm 0.39kPa 24134m 9.8m/s 7.2m/s
15:00
16% 4.5°C 0mm 68% 0cm 40° 10°C 0.19mm 0.39kPa 12641m 8.9m/s 6.2m/s
16:00
24% 4.8°C 0mm 72% 0cm 34° 9.6°C 0.25mm 0.33kPa 24134m 8m/s 5m/s
17:00
16% 5.2°C 0mm 74% 0cm 27° 9.6°C 0.38mm 0.31kPa 24134m 7.1m/s 4.5m/s
18:00
8% 5.8°C 0mm 77% 0cm 19° 9.5°C 0.5mm 0.27kPa 24135m 7.1m/s 4.5m/s
19:00
0% 6.1°C 0mm 84% 0cm 11° 8.7°C 0.69mm 0.19kPa 19408m 8.7m/s 4.4m/s
20:00
0% 6.1°C 0mm 88% 0cm 2.9° 8°C 0.25mm 0.13kPa 23064m 9.8m/s 4.2m/s
21:00 ☾
0% 5.6°C 0mm 88% 0cm -5° 7.4°C 0.38mm 0.12kPa 24135m 10m/s 4.6m/s
22:00 ☾
0% 5.2°C 0mm 90% 0cm -12° 6.7°C 0.44mm 0.1kPa 24135m 7.7m/s 2.8m/s
23:00 ☾
0% 5.4°C 0.34mm 93% 0cm -18° 6.5°C 0.69mm 0.07kPa 21599m 2.3m/s 1.4m/s
Fri, Apr 17 Sunrise 06:08 Sunset 20:25
24:00 ☾
0% 5.7°C 0.51mm 96% 0cm -21° 6.2°C 1.1mm 0.04kPa 16665m 3.1m/s 1.7m/s
01:00 ☾
0% 6°C 0.65mm 98% 0cm -23° 6.3°C 1.7mm 0.02kPa 7538m 4.1m/s 1.8m/s
02:00 ☾
0% 6.3°C 0.51mm 98% 0cm -23° 6.6°C 0.56mm 0.02kPa 5054m 7.8m/s 2.2m/s
03:00 ☾
0% 6.7°C 0.44mm 97% 0cm -20° 7.1°C 0.94mm 0.03kPa 8309m 9.4m/s 2.6m/s
04:00 ☾
0% 6.7°C 0.23mm 97% 0cm -15° 7.2°C 1.3mm 0.03kPa 9987m 10m/s 3m/s
05:00 ☾
0% 6.9°C 0.02mm 97% 0cm -8.9° 7.4°C 1.4mm 0.03kPa 9132m 10m/s 3.3m/s
06:00 ☾
0% 6.8°C 0.02mm 96% 0cm -1.4° 7.4°C 1.4mm 0.04kPa 20041m 10m/s 3.4m/s
07:00
0% 6.8°C 0.87mm 97% 0cm 6.6° 7.4°C 1.9mm 0.03kPa 10924m 10m/s 3.4m/s
08:00
0% 7°C 1.3mm 97% 0cm 15° 7.5°C 1.8mm 0.03kPa 5740m 11m/s 3.8m/s
09:00
0% 6.9°C 1.9mm 96% 0cm 23° 7.6°C 3.3mm 0.04kPa 9371m 12m/s 4.4m/s
10:00
0% 6.9°C 0.96mm 94% 0cm 31° 7.8°C 3.9mm 0.06kPa 9337m 12m/s 4.9m/s
11:00
0% 7.1°C 0.02mm 97% 0cm 37° 7.6°C 4.9mm 0.03kPa 6062m 11m/s 4.5m/s
12:00
0% 7.4°C 0.06mm 93% 0cm 42° 8.4°C 5.1mm 0.07kPa 12308m 12m/s 6.6m/s
13:00
0% 7.3°C 0mm 92% 0cm 44° 8.5°C 5.5mm 0.09kPa 19420m 12m/s 6.6m/s
14:00
2% 7.2°C 0mm 89% 0cm 44° 8.9°C 0.31mm 0.12kPa 18130m 12m/s 7.1m/s
15:00
3% 7.4°C 0mm 84% 0cm 40° 10°C 0.69mm 0.2kPa 16284m 14m/s 8.2m/s
16:00
5% 7.3°C 0mm 82% 0cm 35° 10°C 1.1mm 0.23kPa 15086m 13m/s 8.4m/s
17:00
3% 7.1°C 0mm 81% 0cm 27° 10°C 1.4mm 0.23kPa 18191m 13m/s 7.5m/s
18:00
2% 6.3°C 0mm 81% 0cm 19° 9.4°C 1.8mm 0.22kPa 17461m 13m/s 7.7m/s
19:00
0% 5.7°C 0mm 84% 0cm 11° 8.3°C 2.2mm 0.18kPa 20339m 12m/s 7.1m/s
20:00
3% 5°C 0mm 85% 0cm 3.1° 7.3°C 0.25mm 0.15kPa 22606m 12m/s 6.1m/s
21:00 ☾
7% 4.6°C 0mm 89% 0cm -4.8° 6.2°C 0.38mm 0.1kPa 24135m 12m/s 4.5m/s
22:00 ☾
10% 4.3°C 0mm 90% 0cm -12° 5.7°C 0.5mm 0.09kPa 23150m 13m/s 4.5m/s
23:00 ☾
13% 4°C 0mm 90% 0cm -17° 5.6°C 0.56mm 0.09kPa 24134m 13m/s 5.8m/s
Sat, Apr 18 Sunrise 06:06 Sunset 20:28
24:00 ☾
17% 3.9°C 0mm 90% 0cm -21° 5.4°C 0.56mm 0.09kPa 24134m 13m/s 6.5m/s
01:00 ☾
20% 4.3°C 0mm 91% 0cm -23° 5.7°C 0.63mm 0.08kPa 24135m 12m/s 6.4m/s
02:00 ☾
23% 4.4°C 0mm 92% 0cm -22° 5.6°C 0.06mm 0.08kPa 24134m 12m/s 6m/s
03:00 ☾
27% 4.2°C 0.05mm 90% 0cm -20° 5.6°C 0.06mm 0.09kPa 24134m 13m/s 6.3m/s
04:00 ☾
30% 4.4°C 0.56mm 92% 0cm -15° 5.6°C 0.38mm 0.08kPa 16965m 14m/s 6.4m/s
05:00 ☾
22% 4.8°C 0.23mm 94% 0cm -8.6° 5.6°C 0.75mm 0.05kPa 24135m 13m/s 5.7m/s
06:00 ☾
13% 5°C 0.02mm 92% 0cm -1° 6.3°C 0.88mm 0.08kPa 24135m 12m/s 5.6m/s
07:00
5% 5.3°C 0mm 90% 0cm 6.9° 6.8°C 0.94mm 0.1kPa 24135m 12m/s 4.9m/s
08:00
5% 4.6°C 0.003mm 80% 0cm 15° 7.9°C 0.69mm 0.22kPa 24135m 11m/s 5.2m/s
09:00
5% 3.7°C 0.007mm 69% 0cm 23° 9°C 0.44mm 0.35kPa 24135m 9.5m/s 5.6m/s
10:00
5% 2.5°C 0.01mm 59% 0cm 31° 10°C 0.19mm 0.51kPa 24135m 8.6m/s 6m/s
11:00
5% 2.7°C 0.01mm 62% 0cm 38° 9.7°C 0.19mm 0.46kPa 24135m 8.5m/s 5.7m/s
12:00
4% 2.9°C 0.01mm 65% 0cm 42° 9.2°C 0.19mm 0.41kPa 24135m 8.4m/s 5.4m/s
13:00
4% 3.1°C 0.01mm 68% 0cm 45° 8.6°C 0.19mm 0.36kPa 24135m 8.3m/s 5.1m/s
14:00
11% 3.1°C 0.007mm 74% 0cm 44° 7.4°C 0.13mm 0.27kPa 24135m 6.9m/s 4.2m/s
15:00
17% 3°C 0.003mm 80% 0cm 40° 6.2°C 0.06mm 0.19kPa 24135m 5.5m/s 3.3m/s
16:00
24% 2.8°C 0mm 86% 0cm 35° 5°C 0mm 0.12kPa 24135m 4.1m/s 2.4m/s
17:00
25% 2.7°C 0mm 87% 0cm 28° 4.6°C 0mm 0.11kPa 24135m 3.8m/s 2.3m/s
18:00
26% 2.6°C 0mm 89% 0cm 20° 4.3°C 0mm 0.09kPa 24135m 3.4m/s 2.2m/s
19:00
27% 2.6°C 0mm 91% 0cm 11° 3.9°C 0mm 0.07kPa 24135m 3.1m/s 2.1m/s
20:00
42% 2.5°C 0mm 92% 0cm 3.4° 3.6°C 0mm 0.06kPa 24135m 2.8m/s 2m/s
21:00 ☾
58% 2.3°C 0mm 93% 0cm -4.5° 3.3°C 0mm 0.05kPa 24135m 2.5m/s 1.9m/s
22:00 ☾
73% 2.2°C 0mm 95% 0cm -11° 3°C 0mm 0.04kPa 24135m 2.2m/s 1.8m/s
23:00 ☾
73% 2.2°C 0mm 94% 0cm -17° 3°C 0mm 0.04kPa 24135m 1.9m/s 1.5m/s
Sun, Apr 19 Sunrise 06:03 Sunset 20:30
24:00 ☾
72% 2.2°C 0mm 94% 0cm -21° 3.1°C 0mm 0.05kPa 24135m 1.5m/s 1.3m/s
01:00 ☾
72% 2.2°C 0mm 93% 0cm -23° 3.1°C 0mm 0.05kPa 24135m 1.1m/s 1m/s
02:00 ☾
70% 2.7°C 0mm 86% 0cm -22° 4.9°C 0mm 0.12kPa 24135m 0.9m/s 0.75m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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