Skip to content
✨ New: PhotoWeather is now available on iOS and Android
Rule Morning Frost

Isle of Skye - Morning Frost - Scotland

Portree, 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 100% failing
Time Window 86% failing

Currently

Real-time conditions
Soil Temperature6.9°C
Dew Point6.8°C (moderate dew point)
Wind Speed6.5m/s (moderate winds)
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 tracks the conditions that create Scotland's dramatic frost photography opportunities. We combine temperature, dewpoint, wind, and humidity data to predict when hoar frost will form across Highland landscapes.

The Scottish Highlands offer exceptional frost photography from November through March. Cold clear nights combined with Scotland's naturally high humidity create heavy hoar frost formations that transform heather moorlands, frozen lochs, and mountain valleys into winter wonderlands. The dramatic Highland topography means frost conditions vary by elevation and exposure, creating diverse opportunities.

What makes Scotland special for frost photography:

  • Highland hoar frost - Heavy frost deposits on heather create sparkling purple-white moorlands
  • Frozen lochs - Ice formations along loch shores, particularly in the Cairngorms
  • Mountain ice crystals - High Cairngorms peaks develop spectacular rime ice formations
  • Glen Coe frost - The famous valley transformed by frost on grass and bracken

Rannoch Moor becomes otherworldly under heavy frost—the vast peatland plateau covered in sparkling crystals with distant peaks beyond. The Cairngorms' high elevation means consistent frost formation, with frozen pools and ice-covered grasses creating miniature landscapes. Glen Coe's dramatic valley takes on ethereal beauty when frost transforms the bracken-covered slopes. Frozen lochs like Loch an Eilein develop fascinating ice patterns along their shores. The key is clear, calm nights following cold days—our forecast identifies these conditions and tracks morning visibility to ensure you can capture the frost before it melts.

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 95 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
02:000%2.3m/s
03:001.3%2m/s
04:002.5%1m/s
05:002.9%1.5m/s
06:002.7%1.8m/s
07:001.2%2.2m/s
08:001.6%2.8m/s
09:001.4%4m/s
10:001.5%4.7m/s
11:001.5%5.2m/s
12:001.3%5.8m/s
13:002.6%6.5m/s
14:002.6%7.4m/s
15:002.6%7.6m/s
16:002.6%7.6m/s
17:001.3%7.3m/s
18:001.3%7.5m/s
19:001.3%6.8m/s
20:001.3%6.4m/s
21:001.3%6.3m/s
22:001%6.6m/s
23:001%6.4m/s
Thu, Apr 9
24:000.6%6.4m/s
01:000.6%6m/s
02:000.6%5.9m/s
03:000.6%6.5m/s
04:000.6%5.7m/s
05:001.2%5.1m/s
06:001.5%5m/s
07:001.3%6m/s
08:001%5.8m/s
09:001.2%5m/s
10:001.5%5.4m/s
11:003.7%6.7m/s
12:004.5%7m/s
13:004.5%7.4m/s
14:003%7.9m/s
15:002.1%7.7m/s
16:001.6%5.5m/s
17:001.4%8.8m/s
18:001.7%6.6m/s
19:001.3%7m/s
20:002.1%6.7m/s
21:0022%6.2m/s
22:0027%6.1m/s
23:0027%5.9m/s
Fri, Apr 10
24:0029%5m/s
01:0024%4.5m/s
02:0041%4m/s
03:0033%4.2m/s
04:0043%3.1m/s
05:0029%3.2m/s
06:0045%2.6m/s
07:0037%2.4m/s
08:0037%2.7m/s
09:0040%3.5m/s
10:0046%4.3m/s
11:0035%4.6m/s
12:0035%4.8m/s
13:0033%4.8m/s
14:0033%4.9m/s
15:0033%5.4m/s
16:0031%6.5m/s
17:0031%7m/s
18:0031%7.3m/s
19:0027%7m/s
20:0027%8.4m/s
21:0031%9.5m/s
22:0027%9.4m/s
23:0027%8.8m/s
Sat, Apr 11
24:0027%8.3m/s
01:0027%8m/s
02:0014%9m/s
03:0011%8.9m/s
04:0011%9m/s
05:007%5.9m/s
06:0022%8.8m/s
07:009%8m/s
08:000%8.3m/s
09:000%8.7m/s
10:000%9.1m/s
11:000%9.1m/s
12:000%9.2m/s
13:000%9.2m/s
14:000%9.2m/s
15:000%9.1m/s
16:000%9m/s
17:000%9.9m/s
18:000%11m/s
19:000%12m/s
20:000%12m/s
21:000%13m/s
22:000%13m/s
23:000%14m/s
Sun, Apr 12
24:000%14m/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 06:32 Sunset 20:21
03:00
6.8°C 6.9°C 7.4°C - 100% 0.04kPa
04:00
6.7°C 6.9°C 7.2°C - 100% 0.03kPa
05:00
5.9°C 6.9°C 6.9°C - 100% 0.07kPa
06:00
4.4°C 6.8°C 6.5°C - 100% 0.13kPa
07:00
3.8°C 6.6°C 5.6°C - 99% 0.11kPa
08:00
3.8°C 6.5°C 5.1°C - 100% 0.08kPa
09:00
2.1°C 6.2°C 3.8°C - 100% 0.09kPa
10:00
2.4°C 6.1°C 5.2°C - 100% 0.16kPa
11:00
1.9°C 6.2°C 6.1°C - 18% 0.24kPa
12:00
0.5°C 6.4°C 6.5°C - 5% 0.34kPa
13:00
0.2°C 6.6°C 6.7°C - 5% 0.36kPa
14:00
0.7°C 6.8°C 6.8°C - 100% 0.34kPa
15:00
2.5°C 6.9°C 5.6°C - 98% 0.18kPa
16:00
3°C 6.7°C 5.5°C - 68% 0.14kPa
17:00
3.7°C 6.8°C 5.9°C - 75% 0.14kPa
18:00
1.9°C 6.7°C 4.6°C - 59% 0.15kPa
19:00
2.2°C 6.5°C 4.8°C - 100% 0.15kPa
20:00
0.9°C 6.2°C 4.6°C - 100% 0.19kPa
21:00
0.1°C 5.9°C 4°C - 100% 0.2kPa
22:00
-0.6°C 5.6°C 3.9°C - 100% 0.22kPa
23:00
-1.5°C 5.3°C 3.5°C - 97% 0.24kPa
Fri, Apr 10 Sunrise 06:32 Sunset 20:21
24:00
-1.8°C 5°C 2.7°C - 100% 0.21kPa
01:00
-1.8°C 4.7°C 2.3°C - 100% 0.19kPa
02:00
-2.2°C 4.3°C 2.1°C - 9% 0.19kPa
03:00
-2.4°C 4°C 1.9°C - 31% 0.19kPa
04:00
-2.3°C 3.6°C 1.6°C - 5% 0.17kPa
05:00
-2.3°C 3.6°C 1.3°C - 66% 0.16kPa
06:00
-2.1°C 3.5°C 1.1°C - 5% 0.14kPa
07:00
-2.1°C 3.5°C 0.89°C - 5% 0.13kPa
08:00
-1.2°C 3.3°C 2.3°C - 26% 0.16kPa
09:00
-1°C 3.3°C 4.2°C - 27% 0.26kPa
10:00
-1.5°C 3.3°C 5.2°C - 22% 0.33kPa
11:00
-1.4°C 3.5°C 5.9°C - 88% 0.38kPa
12:00
-1.3°C 3.6°C 6°C - 100% 0.38kPa
13:00
-1°C 4.1°C 6.2°C - 100% 0.38kPa
14:00
-0.4°C 4.6°C 6.1°C - 100% 0.35kPa
15:00
-0.7°C 4.8°C 6°C - 100% 0.36kPa
16:00
-0.1°C 5.1°C 6.3°C - 100% 0.35kPa
17:00
-0.6°C 5.2°C 6.1°C - 100% 0.36kPa
18:00
-0.5°C 5.3°C 5.9°C - 100% 0.34kPa
19:00
0.3°C 5.2°C 4.9°C - 100% 0.24kPa
20:00
-0.3°C 5.1°C 4.8°C - 99% 0.26kPa
21:00
-1.6°C 4.9°C 4.5°C - 96% 0.3kPa
22:00
-0.7°C 4.8°C 4.5°C - 100% 0.26kPa
23:00
0°C 4.7°C 4.3°C - 100% 0.22kPa
Sat, Apr 11 Sunrise 06:29 Sunset 20:24
24:00
0.3°C 4.6°C 4.5°C - 100% 0.22kPa
01:00
0.4°C 4.5°C 4.4°C - 100% 0.21kPa
02:00
1.3°C 4.4°C 3.6°C - 100% 0.12kPa
03:00
2°C 4.3°C 3.6°C - 100% 0.08kPa
04:00
2.6°C 4.3°C 3.7°C - 100% 0.06kPa
05:00
2.4°C 4.2°C 3°C - 100% 0.03kPa
06:00
0.5°C 4.1°C 3.6°C - 86% 0.16kPa
07:00
1.6°C 3.9°C 2.1°C - 100% 0.03kPa
08:00
1.2°C 3245°C 3.6°C - 68% 0.12kPa
09:00
0.5°C 6485°C 5.1°C - 36% 0.24kPa
10:00
-0.6°C 9726°C 6.6°C - 5% 0.39kPa
11:00
-0.5°C 9726°C 6.7°C - 6% 0.39kPa
12:00
-0.4°C 9726°C 6.7°C - 7% 0.39kPa
13:00
-0.3°C 9726°C 6.8°C - 9% 0.39kPa
14:00
0°C 9726°C 6.5°C - 39% 0.36kPa
15:00
0.3°C 9726°C 6.3°C - 69% 0.33kPa
16:00
0.6°C 9726°C 6°C - 99% 0.3kPa
17:00
1.3°C 9726°C 6.1°C - 95% 0.27kPa
18:00
1.9°C 9726°C 6.2°C - 91% 0.25kPa
19:00
2.5°C 9726°C 6.3°C - 87% 0.22kPa
20:00
2.5°C 9726°C 6.5°C - 91% 0.24kPa
21:00
2.5°C 9726°C 6.8°C - 96% 0.26kPa
22:00
2.5°C 9726°C 7°C - 100% 0.27kPa
23:00
2.6°C 9726°C 6.7°C - 100% 0.25kPa
Sun, Apr 12 Sunrise 06:26 Sunset 20:26
24:00
2.7°C 9726°C 6.5°C - 100% 0.23kPa
01:00
2.8°C 9726°C 6.2°C - 100% 0.2kPa
02:00
3.1°C 9726°C 6°C - 100% 0.17kPa
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