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Rule Fog Hunter

La Fortuna - Fog Hunter - Costa Rica

La Fortuna, Alajuela 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 Spread0.6°C
Visibility1576 (Mist/Haze)
Relative Humidity96%
Wind Speed3.0m/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
1matching hours in the next 80 hoursJump to next match
AND logic: all conditions required
Meets requirement
Misses requirement
Time
America/Costa_Rica
Fog Probability
≥ 75.0%
Sat, May 23
22:0048%
23:0060%
Sun, May 24
24:0065%
01:0086%
02:0069%
03:0060%
04:0063%
05:0067%
06:0065%
07:0045%
08:000%
09:000%
10:000%
11:000%
12:000%
13:000%
14:000%
15:000%
16:000%
17:000%
18:000%
19:000%
20:0057%
21:0042%
22:000%
23:000%
Mon, May 25
24:000%
01:0069%
02:0065%
03:0063%
04:0048%
05:0048%
06:0055%
07:000%
08:000%
09:000%
10:000%
11:000%
12:000%
13:000%
14:000%
15:000%
16:000%
17:000%
18:000%
19:000%
20:0042%
21:0055%
22:000%
23:000%
Tue, May 26
24:000%
01:0069%
02:0055%
03:0043%
04:0036%
05:0029%
06:000%
07:000%
08:000%
09:000%
10:000%
11:000%
12:000%
13:000%
14:000%
15:000%
16:000%
17:000%
18:000%
19:000%
20:000%
21:000%
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 05:15 Sunset 17:55
07:00
0% 22°C 0mm 96% 0cm 23° 22°C 0.25mm 0.11kPa 1576m 6m/s 3m/s
08:00
0% 22°C 0mm 91% 0cm 37° 23°C 0.56mm 0.24kPa 2607m 6.3m/s 3.3m/s
09:00
0% 22°C 0mm 88% 0cm 51° 24°C 0.81mm 0.36kPa 1258m 6.4m/s 3.7m/s
10:00
0% 22°C 0mm 85% 0cm 65° 25°C 1.2mm 0.47kPa 1226m 6.8m/s 4.1m/s
11:00
0% 22°C 0mm 82% 0cm 77° 25°C 1.8mm 0.58kPa 1789m 7m/s 4.3m/s
12:00
0% 22°C 0mm 79% 0cm 78° 26°C 2.3mm 0.7kPa 11878m 7.3m/s 4.6m/s
13:00
1% 22°C 0mm 81% 0cm 67° 25°C 0.56mm 0.61kPa 13898m 7.2m/s 4.4m/s
14:00
2% 21°C 0mm 77% 0cm 54° 26°C 1.1mm 0.78kPa 24134m 7m/s 4.4m/s
15:00
3% 21°C 0mm 76% 0cm 40° 26°C 1.6mm 0.82kPa 23668m 6.9m/s 4.6m/s
16:00
2% 21°C 0mm 80% 0cm 26° 25°C 1.9mm 0.63kPa 15293m 6.7m/s 4.4m/s
17:00
2% 21°C 0mm 86% 0cm 12° 24°C 2.3mm 0.42kPa 9423m 6.4m/s 3.9m/s
18:00
1% 21°C 0mm 93% 0cm -1.7° 22°C 2.7mm 0.2kPa 2508m 6.1m/s 3.1m/s
19:00
1% 21°C 0mm 95% 0cm -15° 22°C 0.31mm 0.13kPa 1451m 6.4m/s 2.8m/s
20:00
0% 21°C 0mm 96% 0cm -28° 22°C 0.69mm 0.1kPa 1279m 7.3m/s 2.9m/s
21:00
0% 21°C 0mm 96% 0cm -41° 22°C 0.94mm 0.1kPa 2194m 7.3m/s 2.7m/s
22:00
0% 21°C 0mm 96% 0cm -51° 22°C 1.1mm 0.11kPa 3150m 7.4m/s 2.7m/s
23:00
0% 21°C 0mm 96% 0cm -57° 21°C 1.3mm 0.1kPa 2571m 6.9m/s 2.4m/s
Mon, May 25 Sunrise 05:15 Sunset 17:55
24:00
0% 20°C 0mm 98% 0cm -58° 21°C 1.4mm 0.05kPa 2574m 6.3m/s 2.2m/s
01:00
0% 20°C 0mm 98% 0cm -52° 21°C 0.13mm 0.04kPa 2361m 6.2m/s 2.2m/s
02:00
0% 21°C 0mm 98% 0cm -43° 21°C 0.31mm 0.04kPa 522m 6.6m/s 2.4m/s
03:00
0% 21°C 0mm 98% 0cm -31° 21°C 0.38mm 0.05kPa 763m 6.6m/s 2.3m/s
04:00
0% 21°C 0mm 98% 0cm -18° 21°C 0.5mm 0.05kPa 3123m 6.4m/s 2.5m/s
05:00
0% 20°C 0.01mm 98% 0cm -4.3° 21°C 0.56mm 0.05kPa 3623m 6m/s 2.4m/s
06:00
0% 21°C 0mm 97% 0cm 9.5° 21°C 0.63mm 0.07kPa 2412m 6.9m/s 2.5m/s
07:00
0% 21°C 0mm 93% 0cm 23° 22°C 0.13mm 0.19kPa 2834m 8m/s 3.5m/s
08:00
0% 21°C 0mm 91% 0cm 37° 22°C 0.25mm 0.25kPa 3063m 7.1m/s 3.6m/s
09:00
0% 21°C 0mm 88% 0cm 51° 23°C 0.44mm 0.35kPa 2293m 6.9m/s 3.6m/s
10:00
0% 21°C 0mm 82% 0cm 65° 25°C 0.63mm 0.57kPa 4068m 7.1m/s 4.1m/s
11:00
0% 21°C 0mm 74% 0cm 76° 26°C 0.81mm 0.88kPa 23832m 7.2m/s 4.2m/s
12:00
0% 20°C 0mm 68% 0cm 78° 27°C 0.94mm 1.1kPa 24134m 7.4m/s 4.5m/s
13:00
0% 21°C 0mm 68% 0cm 67° 27°C 0.13mm 1.1kPa 24135m 7.1m/s 5m/s
14:00
1% 21°C 0mm 72% 0cm 54° 26°C 0.38mm 0.97kPa 24134m 6.8m/s 4.5m/s
15:00
1% 21°C 0mm 72% 0cm 40° 26°C 0.5mm 0.95kPa 24135m 6.2m/s 4.2m/s
16:00
1% 21°C 0mm 73% 0cm 26° 26°C 0.63mm 0.91kPa 24134m 6.2m/s 3.6m/s
17:00
0% 21°C 0mm 76% 0cm 12° 25°C 0.75mm 0.75kPa 24134m 6.6m/s 3.3m/s
18:00
0% 21°C 0mm 84% 0cm -1.7° 24°C 0.94mm 0.47kPa 18858m 6.4m/s 3.1m/s
19:00
0% 21°C 0mm 92% 0cm -15° 22°C 0.25mm 0.22kPa 9559m 5.6m/s 2.5m/s
20:00
0% 21°C 0mm 96% 0cm -28° 22°C 0.56mm 0.1kPa 2214m 4.8m/s 2.2m/s
21:00
0% 21°C 0mm 98% 0cm -40° 21°C 0.81mm 0.06kPa 2183m 5.3m/s 2.1m/s
22:00
0% 21°C 0mm 98% 0cm -51° 21°C 1.1mm 0.06kPa 1904m 4.8m/s 1.9m/s
23:00
0% 21°C 0mm 98% 0cm -57° 21°C 1.4mm 0.05kPa 1874m 4.2m/s 1.8m/s
Tue, May 26 Sunrise 05:15 Sunset 17:55
24:00
0% 21°C 0mm 98% 0cm -58° 21°C 1.6mm 0.05kPa 2409m 4.3m/s 1.9m/s
01:00
0% 21°C 0mm 98% 0cm -52° 21°C 0.13mm 0.06kPa 2899m 4.1m/s 1.8m/s
02:00
0% 21°C 0mm 97% 0cm -42° 21°C 0.25mm 0.06kPa 2787m 3.2m/s 1.6m/s
03:00
0% 21°C 0mm 97% 0cm -31° 21°C 0.25mm 0.08kPa 2824m 2.6m/s 1.5m/s
04:00
0% 20°C 0mm 96% 0cm -18° 21°C 0.31mm 0.09kPa 3629m 2.6m/s 1.5m/s
05:00
0% 20°C 0mm 96% 0cm -4.3° 21°C 0.31mm 0.1kPa 24134m 2.6m/s 1.5m/s
06:00
0% 20°C 0mm 94% 0cm 9.5° 21°C 0.38mm 0.16kPa 24134m 3.3m/s 1.7m/s
07:00
0% 20°C 0mm 88% 0cm 23° 22°C 0mm 0.32kPa 24134m 4.5m/s 2.3m/s
08:00
0% 21°C 0mm 85% 0cm 37° 23°C 0.06mm 0.41kPa 24065m 4.1m/s 2.5m/s
09:00
0% 21°C 0.01mm 80% 0cm 51° 25°C 0.25mm 0.63kPa 24135m 4.3m/s 2.9m/s
10:00
0% 21°C 0mm 74% 0cm 65° 26°C 0.5mm 0.86kPa 22365m 4.6m/s 3.3m/s
11:00
0% 21°C 0mm 73% 0cm 76° 26°C 1.1mm 0.92kPa 9030m 5m/s 3.7m/s
12:00
0% 21°C 0mm 74% 0cm 78° 26°C 1.9mm 0.87kPa 8047m 4.5m/s 3.6m/s
13:00
0% 22°C 0.04mm 81% 0cm 67° 25°C 2.4mm 0.6kPa 13410m 3.4m/s 2.7m/s
14:00
0% 22°C 0.08mm 88% 0cm 54° 24°C 3mm 0.35kPa 18772m 2.2m/s 1.8m/s
15:00
0% 23°C 0.12mm 95% 0cm 40° 23°C 3.6mm 0.13kPa 24135m 1.1m/s 0.86m/s
16:00
0% 22°C 0.08mm 95% 0cm 26° 23°C 3.7mm 0.13kPa 24135m 1.2m/s 0.96m/s
17:00
0% 22°C 0.05mm 95% 0cm 12° 23°C 3.9mm 0.14kPa 24135m 1.3m/s 1.1m/s
18:00
0% 22°C 0.01mm 95% 0cm -1.6° 23°C 4.1mm 0.14kPa 24135m 1.4m/s 1.1m/s
19:00
0% 22°C 0.01mm 94% 0cm -15° 23°C 2.7mm 0.15kPa 24135m 1.1m/s 0.91m/s
20:00
0% 22°C 0.02mm 94% 0cm -28° 23°C 1.4mm 0.17kPa 24135m 0.75m/s 0.66m/s
21:00
0% 22°C 0.02mm 94% 0cm -40° 23°C 0mm 0.18kPa 24135m 0.43m/s 0.42m/s
22:00
0% 22°C 0.01mm 94% 0cm -50° 23°C 0.02mm 0.18kPa 24135m 0.47m/s 0.49m/s
23:00
0% 22°C 0.007mm 94% 0cm -57° 23°C 0.04mm 0.17kPa 24135m 0.5m/s 0.55m/s
Wed, May 27 Sunrise 05:15 Sunset 17:55
24:00
0% 22°C 0mm 94% 0cm -58° 23°C 0.06mm 0.17kPa 24135m 0.54m/s 0.62m/s
01:00
0% 22°C 0mm 85% 0cm -52° 24°C 0.04mm 0.47kPa 24135m 0.84m/s 0.63m/s
02:00
0% 21°C 0mm 75% 0cm -42° 26°C 0.02mm 0.82kPa 24135m 1.1m/s 0.65m/s
03:00
0% 21°C 0mm 66% 0cm -31° 28°C 0mm 1.2kPa 24135m 1.4m/s 0.66m/s
04:00
0% 21°C 0.003mm 60% 0cm -18° 29°C 0mm 1.6kPa 24135m 1.7m/s 0.95m/s
05:00
0% 20°C 0.007mm 54% 0cm -4.3° 31°C 0mm 2kPa 24135m 2.1m/s 1.2m/s
06:00
0% 20°C 0.01mm 48% 0cm 9.5° 32°C 0mm 2.4kPa 24135m 2.4m/s 1.5m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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