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Rule Fog Hunter

Rincón de la Vieja - Fog Hunter - Costa Rica

Liberia, Guanacaste Province, Costa Rica

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 · ≥ 75.0%

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
Dewpoint Spread6.8°C
Visibility24135 (Clear)
Relative Humidity67%
Wind Speed2.7m/s (calm conditions)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in America/Costa_Rica

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 predicts when cloud forest conditions and valley fog create atmospheric scenes across Costa Rica's diverse elevations and microclimates. We track elevation-specific humidity, temperature differentials, and wind patterns to identify when fog and mist transform rainforest, cloud forest, and volcanic landscapes.

Costa Rica's dramatic topography creates numerous fog microclimates—from Monteverde's perpetual cloud forest mist to volcanic valley inversions to Caribbean coastal morning fog. The collision of Pacific and Caribbean weather systems over mountainous terrain produces exceptional fog photography opportunities year-round, with green season (May-November) bringing the most dramatic conditions.

What makes Costa Rica fog photography special:

  • Cloud forest immersion - Monteverde's permanent fog layer supports epiphyte-draped forests where mist is the defining feature, not occasional visitor
  • Volcanic valley fog - Arenal and Turrialba valleys fill with morning fog while volcanic peaks emerge above inversion layers
  • Microclimate transitions - Experience multiple fog types in single day—cloud forest, valley fog, coastal mist across short distances
  • Jungle emergence - Rainforest canopy trees and cecropia emerging from morning fog layers create layered atmospheric compositions

Monteverde cloud forest reserve exists because of fog—the persistent cloud layer that supports one of Earth's most biodiverse ecosystems. Here, photography captures fog as environment, with epiphytes, bromeliads, and moss-draped trees emerging from perpetual mist. The suspended bridges offer unique elevated perspectives into the fog layer. From La Fortuna, Arenal Volcano's perfect cone rises above valley fog on calm mornings, especially during green season. Turrialba Valley experiences similar inversions with the active volcano emerging above fog pools. Rincón de la Vieja's volcanic slopes create altitude-based fog layers with fumaroles adding volcanic steam to natural mist. Best conditions occur during green season when humidity is highest—arrive early as valley fog often dissipates by 8-9 AM.

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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
America/Costa_Rica
Fog Probability
≥ 75.0%
Sat, May 23
07:000%
08:000%
09:000%
10:000%
11:000%
12:000%
13:000%
14:000%
15:000%
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Sun, May 24
24:000%
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03:000%
04:000%
05:000%
06:000%
07:000%
08:000%
09:000%
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16:000%
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Mon, May 25
24:000%
01:000%
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03:000%
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05:000%
06:000%
07:000%
08:000%
09:000%
10:000%
11:000%
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Tue, May 26
24:000%
01:000%
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03:000%
04:000%
05:000%
06:000%
07:000%
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22:000%
23:000%
Wed, May 27
24:000%
01:000%
02:000%
03:000%
04:000%
05:000%
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
America/Costa_Rica
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
Sun, May 24 Sunrise 05:18 Sunset 17:58
07:00
23% 21°C 0mm 67% 0cm 23° 28°C 0mm 1.2kPa 24135m 4.4m/s 2.7m/s
08:00
38% 21°C 0mm 57% 0cm 37° 30°C 0mm 1.8kPa 24135m 4.2m/s 2.6m/s
09:00
54% 21°C 0mm 51% 0cm 51° 32°C 0.06mm 2.3kPa 24134m 5.3m/s 2.7m/s
10:00
47% 20°C 0.01mm 46% 0cm 64° 33°C 0.06mm 2.7kPa 24134m 6.4m/s 3.1m/s
11:00
40% 20°C 0mm 44% 0cm 76° 34°C 0.06mm 3kPa 24134m 6.5m/s 3.6m/s
12:00
33% 20°C 0mm 44% 0cm 79° 34°C 0.06mm 3kPa 24134m 6.2m/s 4m/s
13:00
23% 20°C 0mm 44% 0cm 68° 34°C 0mm 3kPa 24135m 6.4m/s 4.7m/s
14:00
14% 20°C 0mm 43% 0cm 55° 34°C 0mm 3kPa 24134m 6.6m/s 4.7m/s
15:00
4% 19°C 0mm 41% 0cm 41° 34°C 0mm 3.2kPa 24135m 6.4m/s 4.3m/s
16:00
4% 19°C 0mm 42% 0cm 27° 33°C 0mm 3kPa 24134m 5.9m/s 3.5m/s
17:00
5% 19°C 0mm 47% 0cm 13° 32°C 0.06mm 2.5kPa 24135m 5.8m/s 2.5m/s
18:00
5% 20°C 0mm 56% 0cm -0.82° 29°C 0.06mm 1.8kPa 24135m 3.8m/s 2m/s
19:00
10% 21°C 0mm 65% 0cm -15° 28°C 0mm 1.3kPa 24135m 6m/s 3.3m/s
20:00
16% 21°C 0.01mm 71% 0cm -28° 27°C 0mm 1kPa 24135m 5.8m/s 2.9m/s
21:00
21% 21°C 0mm 76% 0cm -40° 26°C 0mm 0.8kPa 24135m 5.5m/s 2.6m/s
22:00
17% 21°C 0mm 79% 0cm -50° 25°C 0mm 0.68kPa 24134m 5.7m/s 2.6m/s
23:00
14% 21°C 0mm 79% 0cm -57° 25°C 0mm 0.67kPa 24134m 6.5m/s 2.7m/s
Mon, May 25 Sunrise 05:18 Sunset 17:58
24:00
10% 21°C 0mm 78% 0cm -58° 25°C 0mm 0.68kPa 24134m 5.8m/s 2.4m/s
01:00
7% 21°C 0mm 80% 0cm -53° 24°C 0mm 0.61kPa 24135m 4.2m/s 2.1m/s
02:00
3% 21°C 0mm 83% 0cm -43° 24°C 0mm 0.51kPa 24134m 2.5m/s 1.6m/s
03:00
0% 21°C 0mm 84% 0cm -31° 24°C 0mm 0.46kPa 24135m 2.7m/s 1.7m/s
04:00
0% 21°C 0mm 84% 0cm -18° 24°C 0mm 0.46kPa 24135m 2.5m/s 1.5m/s
05:00
0% 21°C 0mm 85% 0cm -5° 24°C 0mm 0.45kPa 24134m 2.4m/s 1.7m/s
06:00
0% 21°C 0mm 80% 0cm 8.8° 24°C 0mm 0.61kPa 24135m 4.7m/s 2.1m/s
07:00
0% 20°C 0mm 68% 0cm 23° 27°C 0mm 1.1kPa 24134m 5.7m/s 3.1m/s
08:00
0% 20°C 0mm 57% 0cm 37° 29°C 0mm 1.7kPa 24134m 5.3m/s 3m/s
09:00
0% 20°C 0mm 50% 0cm 51° 31°C 0mm 2.3kPa 24134m 6.1m/s 3.1m/s
10:00
0% 20°C 0mm 46% 0cm 64° 33°C 0mm 2.7kPa 24134m 7m/s 3.5m/s
11:00
0% 19°C 0mm 42% 0cm 76° 34°C 0.06mm 3kPa 24135m 7m/s 4.3m/s
12:00
0% 19°C 0mm 40% 0cm 78° 35°C 0.06mm 3.3kPa 24134m 6.7m/s 4.3m/s
13:00
0% 18°C 0mm 37% 0cm 68° 35°C 0mm 3.5kPa 24135m 6.2m/s 4.1m/s
14:00
0% 19°C 0mm 38% 0cm 55° 35°C 0mm 3.5kPa 24134m 6.1m/s 4.7m/s
15:00
0% 19°C 0mm 40% 0cm 41° 34°C 0mm 3.2kPa 24135m 5.4m/s 5m/s
16:00
0% 19°C 0mm 45% 0cm 27° 33°C 0mm 2.7kPa 24134m 4.5m/s 3.6m/s
17:00
0% 20°C 0mm 52% 0cm 13° 31°C 0mm 2.1kPa 24134m 4m/s 2.2m/s
18:00
0% 20°C 0mm 61% 0cm -0.74° 29°C 0mm 1.5kPa 24135m 2.7m/s 1m/s
19:00
0% 21°C 0mm 67% 0cm -15° 27°C 0mm 1.2kPa 24134m 1.9m/s 0.68m/s
20:00
0% 21°C 0mm 70% 0cm -28° 27°C 0mm 1kPa 24135m 3.7m/s 1.9m/s
21:00
0% 21°C 0mm 73% 0cm -40° 26°C 0mm 0.93kPa 24134m 5.5m/s 2.6m/s
22:00
0% 21°C 0mm 77% 0cm -50° 26°C 0mm 0.76kPa 24134m 5.4m/s 2.4m/s
23:00
0% 21°C 0mm 80% 0cm -57° 25°C 0mm 0.63kPa 24134m 5.8m/s 2.3m/s
Tue, May 26 Sunrise 05:18 Sunset 17:59
24:00
0% 21°C 0mm 81% 0cm -58° 25°C 0mm 0.59kPa 24135m 4.2m/s 2m/s
01:00
0% 21°C 0mm 80% 0cm -52° 25°C 0mm 0.61kPa 24134m 4.1m/s 1.9m/s
02:00
0% 21°C 0mm 80% 0cm -43° 25°C 0mm 0.63kPa 24135m 3.1m/s 1.4m/s
03:00
0% 21°C 0mm 81% 0cm -31° 24°C 0mm 0.58kPa 24134m 2.9m/s 1.7m/s
04:00
0% 21°C 0mm 82% 0cm -18° 24°C 0mm 0.53kPa 24135m 2.3m/s 1.6m/s
05:00
0% 21°C 0mm 81% 0cm -5° 24°C 0mm 0.56kPa 24134m 2.9m/s 2.1m/s
06:00
0% 20°C 0mm 76% 0cm 8.8° 25°C 0mm 0.73kPa 24134m 3.6m/s 1.9m/s
07:00
0% 20°C 0mm 69% 0cm 23° 26°C 0mm 1.1kPa 24134m 3.2m/s 1.5m/s
08:00
1% 20°C 0mm 63% 0cm 37° 28°C 0mm 1.4kPa 24135m 2.6m/s 1.7m/s
09:00
1% 20°C 0mm 54% 0cm 51° 30°C 0mm 1.9kPa 24135m 2.8m/s 1.9m/s
10:00
1% 19°C 0mm 50% 0cm 64° 31°C 0mm 2.3kPa 24134m 2.7m/s 1.3m/s
11:00
1% 19°C 0mm 44% 0cm 76° 33°C 0mm 2.8kPa 24135m 3.8m/s 1.6m/s
12:00
1% 19°C 0mm 42% 0cm 78° 34°C 0mm 3kPa 24134m 4.1m/s 1.6m/s
13:00
1% 22°C 0.21mm 58% 0cm 68° 31°C 1.3mm 1.8kPa 22287m 4.4m/s 1.9m/s
14:00
0% 23°C 0.42mm 75% 0cm 55° 28°C 2.6mm 0.94kPa 20441m 4.7m/s 2.2m/s
15:00
0% 23°C 0.63mm 91% 0cm 41° 25°C 3.9mm 0.28kPa 18594m 5m/s 2.4m/s
16:00
0% 23°C 0.42mm 91% 0cm 27° 25°C 4mm 0.3kPa 20441m 4.3m/s 2.1m/s
17:00
0% 23°C 0.22mm 90% 0cm 13° 25°C 4.1mm 0.32kPa 22288m 3.5m/s 1.8m/s
18:00
0% 23°C 0.01mm 90% 0cm -0.66° 25°C 4.1mm 0.34kPa 24135m 2.8m/s 1.5m/s
19:00
1% 23°C 0.007mm 89% 0cm -14° 25°C 2.8mm 0.37kPa 24135m 2m/s 1.2m/s
20:00
1% 23°C 0.003mm 88% 0cm -28° 25°C 1.4mm 0.4kPa 24135m 1.3m/s 0.83m/s
21:00
2% 23°C 0mm 87% 0cm -40° 25°C 0mm 0.43kPa 24135m 0.53m/s 0.48m/s
22:00
2% 23°C 0.003mm 86% 0cm -50° 25°C 0mm 0.44kPa 24135m 1m/s 0.77m/s
23:00
2% 23°C 0.007mm 86% 0cm -57° 26°C 0mm 0.45kPa 24135m 1.5m/s 1.1m/s
Wed, May 27 Sunrise 05:18 Sunset 17:59
24:00
2% 23°C 0.01mm 86% 0cm -58° 26°C 0mm 0.47kPa 24135m 2m/s 1.3m/s
01:00
2% 23°C 0.007mm 79% 0cm -52° 27°C 0.02mm 0.72kPa 24135m 1.8m/s 1.2m/s
02:00
3% 23°C 0.003mm 73% 0cm -43° 28°C 0.04mm 1kPa 24135m 1.5m/s 1.1m/s
03:00
3% 22°C 0mm 67% 0cm -31° 29°C 0.06mm 1.3kPa 24135m 1.2m/s 1m/s
04:00
2% 22°C 0mm 60% 0cm -18° 31°C 0.06mm 1.8kPa 24135m 2.1m/s 2.1m/s
05:00
1% 21°C 0mm 53% 0cm -5° 32°C 0.06mm 2.2kPa 24135m 2.9m/s 3.1m/s
06:00
0% 20°C 0mm 46% 0cm 8.8° 33°C 0.06mm 2.8kPa 24135m 3.8m/s 4.1m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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