Skip to content
✨ New: PhotoWeather is now available on iOS and Android
PhotoWeather
Get started
More Morning Frost in Trossachs & Loch Lomond
Create your own alerts
Rule Morning Frost

Loch Achray - Morning Frost - Trossachs & Loch Lomond

Callander, Scotland, United Kingdom

Frost crystals on calm, cold mornings near sunrise

No opportunities right now
Here’s what usually blocks matches

No Morning Frost opportunities in the next 14 days

Get notified
Free alerts · takes 30 seconds
Rule requirements (key thresholds)
Time Window · Sunrise -45m to +90m Frost Probability · ≥ 60.0% Wind Speed · ≤ 1.5m/s

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

Most common blockers (next 72 hours)
Frost Probability 100% failing
Wind Speed 94% failing
Time Window 88% failing

Currently

Real-time conditions
Frost Probability
0%
Soil Temperature8.0°C
Dew Point5.8°C (moderate dew point)
Wind Speed2.3m/s (calm conditions)
Cloud Cover100%

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 frost conditions will transform the Trossachs landscape into a winter wonderland. We track overnight temperatures, humidity, and wind to predict when clear, calm nights will produce photogenic frost—hoar frost coating vegetation, ice crystals along shorelines, and frozen lochs creating winter magic.

The Trossachs' Highland fringe position means genuine winter cold while remaining accessible. The combination of lochs, forest, and mountains creates varied frost opportunities, from frozen shorelines to summit hoar frost on Ben A'an.

What makes the Trossachs special for frost photography:

  • Loch shorelines - Ice formations at water's edge at Loch Ard and Loch Achray
  • Forest frost - Native oak and birch woodland coated in hoar frost creating fairy-tale scenes
  • Mountain hoar frost - Ben A'an summit vegetation transformed by ice crystal deposits
  • Waterfall ice - Bracklinn Falls near Callander with ice formations and icicles

Loch Ard's forested shoreline after a hard frost creates magical scenes—oak trees coated in hoar frost, ice crystals along the water's edge, frozen grasses catching low winter sunlight. Ben A'an's summit on frosty mornings combines hoar frost with panoramic views across frozen landscape. Bracklinn Falls develops impressive ice formations during cold spells. Best frost photography occurs December-February during high-pressure systems. Timing is critical—frost is most photogenic at sunrise before sun melts the crystals.

Create your own Morning Frost alerts

Get notified when these conditions match at your own locations.

Get this template

72-hour requirements breakdown

What passed or failed, hour by hour
0matching hours in the next 92 hours
AND logic: all conditions required
Meets requirement
Misses requirement
Time
Europe/London
Time Window
Sunrise -45m to +90m
Frost Probability
≥ 60.0%
Wind Speed
≤ 1.5m/s
Wed, Apr 8
05:00✓0%1.1m/s
06:00✓0%1.1m/s
07:00✓0%1.2m/s
08:00✕0%1.2m/s
09:00✕0%1.5m/s
10:00✕0%1.7m/s
11:00✕0%2.2m/s
12:00✕0%3.6m/s
13:00✕0%4.4m/s
14:00✕0%4.3m/s
15:00✕0%4.9m/s
16:00✕0%5m/s
17:00✕0%4.8m/s
18:00✕0%3.7m/s
19:00✕0%2.8m/s
20:00✕0%2.2m/s
21:00✕0%2m/s
22:00✕0%1.6m/s
23:00✕0%1.7m/s
Thu, Apr 9
24:00✕0%1.5m/s
01:00✕0%1.6m/s
02:00✕0%2m/s
03:00✕0%2.3m/s
04:00✕1.9%2.4m/s
05:00✓1.6%2.5m/s
06:00✓1.2%2.2m/s
07:00✓1.2%2.6m/s
08:00✕1%2.9m/s
09:00✕1.2%4.3m/s
10:00✕1.2%2.4m/s
11:00✕1.4%3.3m/s
12:00✕2.1%5.6m/s
13:00✕2.7%6.1m/s
14:00✕3.1%7.9m/s
15:00✕3.1%8.1m/s
16:00✕3.4%8.6m/s
17:00✕1.3%8.1m/s
18:00✕1%6.3m/s
19:00✕1%6.3m/s
20:00✕0.8%5.2m/s
21:00✕18%6m/s
22:00✕15%4m/s
23:00✕16%4.7m/s
Fri, Apr 10
24:00✕29%4m/s
01:00✕33%3.7m/s
02:00✕32%2.6m/s
03:00✕32%2.3m/s
04:00✕32%1.9m/s
05:00✓34%1.5m/s
06:00✓34%1.5m/s
07:00✓20%1.1m/s
08:00✕29%1m/s
09:00✕30%1.5m/s
10:00✕33%2.2m/s
11:00✕31%2.8m/s
12:00✕35%3.9m/s
13:00✕33%4.3m/s
14:00✕31%4.8m/s
15:00✕31%4.9m/s
16:00✕29%6.6m/s
17:00✕30%7.1m/s
18:00✕32%6.9m/s
19:00✕31%6.6m/s
20:00✕27%6.4m/s
21:00✕27%6.4m/s
22:00✕27%7.1m/s
23:00✕13%6.6m/s
Sat, Apr 11
24:00✕13%7.1m/s
01:00✕13%7.3m/s
02:00✕9%7.1m/s
03:00✕9%6.1m/s
04:00✕9%6.9m/s
05:00✓9%6m/s
06:00✓13%6.3m/s
07:00✓17%5.7m/s
08:00✕26%6.3m/s
09:00✕42%6.9m/s
10:00✕4.1%7.5m/s
11:00✕3.5%7.5m/s
12:00✕3.1%7.5m/s
13:00✕2.6%7.5m/s
14:00✕2.6%7.6m/s
15:00✕2.1%7.7m/s
16:00✕1.3%7.9m/s
17:00✕1.3%7.3m/s
18:00✕22%6.8m/s
19:00✕27%6.2m/s
20:00✕22%6.7m/s
21:00✕22%7.1m/s
22:00✕22%7.5m/s
23:00✕22%7.4m/s
Sun, Apr 12
24:00✕22%7.3m/s
How to read: colored cells show whether each predicate requirement is met; highlighted rows mean the full rule matched (an opportunity).

What does Frost 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
Dew Point
°C
Surface Temperature
°C
Temperature
°C
Time Window
Total Cloud Coverage
%
Vapor Pressure Deficit
kPa
Thu, Apr 9 Sunrise 06:26 Sunset 20:11
03:00 ☾
5.8°C 8°C 7.8°C - 100% 0.14kPa
04:00 ☾
5.1°C 7.9°C 7.6°C - 100% 0.16kPa
05:00 ☾
5.7°C 7.8°C 6.9°C - 100% 0.08kPa
06:00 ☾
6.2°C 7.6°C 6.5°C - 100% 0.02kPa
07:00
6.3°C 7.5°C 6.5°C - 100% 0.01kPa
08:00
6.3°C 7.4°C 6.5°C - 100% 0.01kPa
09:00
4.9°C 7.2°C 5.9°C - 100% 0.07kPa
10:00
3.5°C 7.1°C 4.3°C - 100% 0.05kPa
11:00
3.3°C 6.9°C 4.7°C - 94% 0.08kPa
12:00
2.1°C 6.7°C 5.5°C - 98% 0.19kPa
13:00
0.5°C 6.8°C 6.5°C - 72% 0.33kPa
14:00
0.4°C 6.9°C 6.9°C - 62% 0.37kPa
15:00
-0.3°C 7°C 7°C - 61% 0.4kPa
16:00
-0.5°C 7°C 6.5°C - 49% 0.38kPa
17:00
2.8°C 7°C 5°C - 100% 0.13kPa
18:00
2.4°C 6.7°C 3.7°C - 100% 0.07kPa
19:00
2°C 6.5°C 3.9°C - 100% 0.1kPa
20:00
2.5°C 6.2°C 3.3°C - 100% 0.04kPa
21:00 ☾
1.4°C 5.9°C 3.6°C - 42% 0.11kPa
22:00 ☾
1°C 5.6°C 2.5°C - 92% 0.08kPa
23:00 ☾
0.3°C 5.4°C 3°C - 83% 0.13kPa
Fri, Apr 10 Sunrise 06:26 Sunset 20:11
24:00 ☾
-0.2°C 5.1°C 2.1°C - 21% 0.11kPa
01:00 ☾
-1.1°C 4.7°C 1.3°C - 5% 0.11kPa
02:00 ☾
-1.8°C 4.6°C 0.35°C - 5% 0.09kPa
03:00 ☾
-2°C 4.5°C -0.31°C - 5% 0.07kPa
04:00 ☾
-2.2°C 4.5°C -0.68°C - 5% 0.06kPa
05:00 ☾
-2.3°C 4.5°C -0.75°C - 5% 0.06kPa
06:00 ☾
-2.5°C 4.5°C -0.93°C - 5% 0.06kPa
07:00
-2.3°C 4.5°C -0.61°C - 72% 0.07kPa
08:00
-1.7°C 4.2°C 1°C - 31% 0.12kPa
09:00
-1.3°C 4.3°C 2.8°C - 82% 0.19kPa
10:00
-1.2°C 4.3°C 3.8°C - 100% 0.24kPa
11:00
-1.1°C 4.3°C 4.6°C - 100% 0.29kPa
12:00
-1.2°C 4.3°C 5.3°C - 100% 0.33kPa
13:00
-1.8°C 4.3°C 5.4°C - 100% 0.36kPa
14:00
-2.9°C 4.3°C 6.6°C - 100% 0.48kPa
15:00
-3.2°C 4.3°C 6.4°C - 100% 0.48kPa
16:00
-2.1°C 4.3°C 6.8°C - 94% 0.47kPa
17:00
-2.1°C 4.3°C 6.5°C - 71% 0.45kPa
18:00
-2.1°C 4.3°C 5.8°C - 70% 0.4kPa
19:00
-1.9°C 4.3°C 4.8°C - 96% 0.33kPa
20:00
-1.3°C 4.2°C 4°C - 98% 0.26kPa
21:00 ☾
-1.3°C 4.2°C 3.7°C - 100% 0.24kPa
22:00 ☾
-0.8°C 4.1°C 3.7°C - 100% 0.22kPa
23:00 ☾
0.8°C 4°C 2.8°C - 100% 0.1kPa
Sat, Apr 11 Sunrise 06:24 Sunset 20:13
24:00 ☾
1°C 3.9°C 2.9°C - 100% 0.09kPa
01:00 ☾
1.6°C 3.8°C 2.8°C - 100% 0.06kPa
02:00 ☾
1.9°C 3.7°C 2.5°C - 100% 0.03kPa
03:00 ☾
1.9°C 3.6°C 2.4°C - 100% 0.02kPa
04:00 ☾
2.8°C 3.6°C 3.2°C - 100% 0.02kPa
05:00 ☾
1.1°C 3.5°C 1.9°C - 98% 0.04kPa
06:00 ☾
0.7°C 3.4°C 1.8°C - 81% 0.05kPa
07:00
0.2°C 3.3°C 1.7°C - 58% 0.07kPa
08:00
-0.2°C 4.3°C 3.7°C - 40% 0.19kPa
09:00
-1.1°C 5.3°C 5.8°C - 23% 0.35kPa
10:00
-2.7°C 6.3°C 7.8°C - 5% 0.55kPa
11:00
-1.4°C 6.3°C 7°C - 33% 0.45kPa
12:00
-0.4°C 6.4°C 6.3°C - 61% 0.36kPa
13:00
0.4°C 6.5°C 5.5°C - 88% 0.27kPa
14:00
1°C 6.3°C 5.2°C - 92% 0.23kPa
15:00
1.6°C 6.2°C 4.9°C - 96% 0.18kPa
16:00
2.1°C 6.1°C 4.6°C - 100% 0.14kPa
17:00
2.4°C 6°C 5.2°C - 100% 0.16kPa
18:00
2.7°C 5.9°C 5.8°C - 100% 0.18kPa
19:00
3°C 5.8°C 6.4°C - 100% 0.21kPa
20:00
3°C 5.8°C 6.3°C - 100% 0.2kPa
21:00 ☾
3.1°C 5.8°C 6.3°C - 100% 0.19kPa
22:00 ☾
3.1°C 5.8°C 6.2°C - 100% 0.18kPa
23:00 ☾
2.6°C 5.7°C 5.7°C - 91% 0.18kPa
Sun, Apr 12 Sunrise 06:21 Sunset 20:15
24:00 ☾
2.1°C 5.7°C 5.1°C - 82% 0.17kPa
01:00 ☾
1.6°C 5.6°C 4.6°C - 73% 0.16kPa
02:00 ☾
2.4°C 5.5°C 4.5°C - 82% 0.12kPa
How to read: these inputs help produce the derived score; they are not requirements by themselves.

Get Notified of Opportunities

Create your own custom alerts for this location and more.

Create Free Account