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Rule Fog Hunter

Fog Hunter Forecast for La Fortuna, Costa Rica

La Fortuna, Alajuela Province, Costa Rica

Arenal's cone rises above the pasture and forest edges surrounding La Fortuna. Nearby, dark rock walls contain the tall white plunge of La Fortuna Waterfall as a separate vertical composition.

Currently

Real-time conditions
Dewpoint Spread3.7°C
Visibility21865 (Clear)
Relative Humidity80%
Wind Speed4.0m/s (calm conditions)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in America/Costa_Rica
fog weather icon
Next opportunity
Dense Fog
La Fortuna
Tomorrow · 01:00–03:00 · 2h window
High confidence
96%
🌫️Fog Probability100%
Dewpoint Spread: 0.3°C
Visibility: 414 (Fog)
Relative Humidity: 98%
Wind Speed: 1.2m/s (calm conditions)
fog weather icon
Fog
La Fortuna
Fri, Aug 28 · 21:00–23:00
🌫️Fog Probability:77.1-100%
Medium

How this forecast is evaluated

See which weather signals PhotoWeather uses to identify Fog Hunter conditions across Costa Rica. The requirements and hourly values below show how those signals apply at La Fortuna.

Explore Fog Hunter conditions across Costa Rica →

Recorded match history

Completed PhotoWeather forecast matches recorded for this exact rule at La Fortuna during the last 365 days.

Last 30 days
21
recorded matching windows · 93% average confidence
Last 90 days
45
recorded matching windows · 88% average confidence
Last 365 days
64
recorded matching windows · 87% average confidence
Most frequent recorded start hour

01:00 local time, shared by 23 of 64 matches recorded in the last 365 days.

Most represented month

May, with 20 of 64 matches recorded in the last 365 days.

These figures use completed PhotoWeather MatchEvent records from the previous 365 days only. They describe recorded forecast matches, not observations, climatological probability, or a guarantee of future conditions.

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85-hour requirements breakdown

When available, the detailed table below covers only the stated 85-hour horizon (typically 72–168 hours, depending on available hourly data). Opportunity records above span the next 14 days, so this table does not explain that entire 14-day period.

What passed or failed, hour by hour
2matching hours in the next 85 hoursJump to next match
AND logic: all conditions required
Meets requirement
Misses requirement
Time
America/Costa_Rica
Fog Probability
≥ 75.0%
Fri, Aug 21
23:000%
Sat, Aug 22
24:000%
01:0069%
02:0069%
03:0069%
04:000%
05:000%
06:000%
07:0069%
08:0055%
09:0053%
10:000%
11:000%
12:000%
13:000%
14:000%
15:000%
16:000%
17:000%
18:000%
19:0065%
20:0069%
21:0055%
22:0056%
23:000%
Sun, Aug 23
24:000%
01:00100%
02:00100%
03:0069%
04:0069%
05:0069%
06:0068%
07:0069%
08:0055%
09:0052%
10:000%
11:000%
12:000%
13:000%
14:000%
15:000%
16:000%
17:000%
18:000%
19:0069%
20:0067%
21:0067%
22:0067%
23:0069%
Mon, Aug 24
24:000%
01:0069%
02:0069%
03:0069%
04:0069%
05:0069%
06:000%
07:0060%
08:0052%
09:000%
10:000%
11:000%
12:000%
13:000%
14:000%
15:000%
16:000%
17:000%
18:000%
19:000%
20:000%
21:0048%
22:0048%
23:0048%
Tue, Aug 25
24:0045%
01:000%
02:000%
03:000%
04:000%
05:000%
06:000%
07:000%
08:000%
09:000%
10:000%
11:000%
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
Sat, Aug 22 Sunrise 05:29 Sunset 17:53
13:00
0% 22°C 0mm 80% 0cm 71° 26°C 0.44mm 0.65kPa 21865m 6.4m/s 4m/s
14:00
0% 22°C 0mm 81% 0cm 56° 26°C 1.3mm 0.62kPa 8920m 6.6m/s 4.2m/s
15:00
0% 22°C 0mm 81% 0cm 41° 26°C 2.3mm 0.63kPa 7567m 6.3m/s 4.1m/s
16:00
0% 22°C 0mm 83% 0cm 27° 25°C 3.3mm 0.55kPa 21622m 6.4m/s 3.9m/s
17:00
0% 22°C 0mm 89% 0cm 12° 24°C 3.7mm 0.32kPa 19795m 6.6m/s 3.4m/s
18:00
0% 21°C 0mm 95% 0cm -2.3° 22°C 3.8mm 0.12kPa 4135m 5.5m/s 2.5m/s
19:00
0% 21°C 0mm 96% 0cm -17° 22°C 0.06mm 0.1kPa 3444m 4.8m/s 1.9m/s
20:00
0% 21°C 0mm 97% 0cm -31° 22°C 0.19mm 0.08kPa 1920m 5.1m/s 2.1m/s
21:00
0% 22°C 0mm 98% 0cm -44° 22°C 0.56mm 0.07kPa 1803m 5.3m/s 2.2m/s
22:00
0% 21°C 0mm 98% 0cm -57° 22°C 0.88mm 0.05kPa 1972m 3.5m/s 1.5m/s
23:00
0% 21°C 0mm 98% 0cm -66° 21°C 1mm 0.05kPa 2796m 2.7m/s 1.4m/s
Sun, Aug 23 Sunrise 05:29 Sunset 17:52
24:00
0% 21°C 0mm 98% 0cm -68° 21°C 1.1mm 0.05kPa 2733m 2.3m/s 1.2m/s
01:00
0% 21°C 0mm 98% 0cm -61° 21°C 0.13mm 0.05kPa 414m 2.1m/s 1.2m/s
02:00
0% 21°C 0mm 99% 0cm -49° 22°C 0.19mm 0.04kPa 204m 3.7m/s 2m/s
03:00
0% 21°C 0mm 100% 0cm -36° 21°C 0.44mm 0.01kPa 90m 5m/s 2.3m/s
04:00
0% 21°C 0mm 99% 0cm -22° 21°C 0.63mm 0.02kPa 56m 5.7m/s 2.4m/s
05:00
0% 21°C 0mm 100% 0cm -7.8° 21°C 0.75mm 0.01kPa 54m 6.1m/s 2.5m/s
06:00
0% 21°C 0mm 99% 0cm 6.7° 21°C 0.88mm 0.03kPa 73m 6.7m/s 2.9m/s
07:00
0% 21°C 0.01mm 99% 0cm 21° 21°C 0.19mm 0.02kPa 56m 7.1m/s 2.9m/s
08:00
0% 21°C 0.02mm 99% 0cm 36° 22°C 0.38mm 0.03kPa 68m 6.8m/s 2.8m/s
09:00
0% 22°C 0mm 97% 0cm 50° 22°C 0.75mm 0.07kPa 105m 6.1m/s 3m/s
10:00
0% 22°C 0mm 94% 0cm 65° 23°C 1.5mm 0.17kPa 665m 6.3m/s 3.5m/s
11:00
0% 22°C 0mm 92% 0cm 80° 23°C 2.3mm 0.22kPa 801m 7.3m/s 4m/s
12:00
0% 22°C 0mm 91% 0cm 85° 23°C 3mm 0.25kPa 928m 7.4m/s 4.2m/s
13:00
0% 22°C 0mm 91% 0cm 71° 24°C 0.56mm 0.25kPa 777m 6.4m/s 3.7m/s
14:00
1% 22°C 0mm 90% 0cm 56° 24°C 1.4mm 0.28kPa 2731m 6.7m/s 3.8m/s
15:00
1% 22°C 0mm 89% 0cm 41° 24°C 2.3mm 0.32kPa 2776m 7.5m/s 4.2m/s
16:00
1% 22°C 0mm 91% 0cm 27° 23°C 3mm 0.26kPa 3266m 8.1m/s 4.5m/s
17:00
1% 22°C 0mm 95% 0cm 12° 22°C 3.5mm 0.13kPa 1542m 8.2m/s 3.9m/s
18:00
1% 21°C 0mm 98% 0cm -2.4° 22°C 3.9mm 0.05kPa 295m 8.1m/s 3.2m/s
19:00
1% 21°C 0mm 98% 0cm -17° 21°C 0.19mm 0.04kPa 163m 8.2m/s 3m/s
20:00
0% 21°C 0.01mm 99% 0cm -31° 21°C 0.38mm 0.04kPa 152m 7.4m/s 2.7m/s
21:00
0% 21°C 0mm 99% 0cm -45° 21°C 0.5mm 0.03kPa 143m 7.2m/s 2.8m/s
22:00
0% 21°C 0mm 99% 0cm -57° 21°C 0.69mm 0.03kPa 108m 6.6m/s 2.6m/s
23:00
0% 21°C 0mm 99% 0cm -66° 21°C 0.94mm 0.02kPa 73m 6.1m/s 2.5m/s
Mon, Aug 24 Sunrise 05:29 Sunset 17:52
24:00
0% 21°C 0mm 99% 0cm -68° 21°C 1.2mm 0.02kPa 58m 5.6m/s 2.3m/s
01:00
0% 21°C 0.01mm 99% 0cm -61° 21°C 0.25mm 0.02kPa 57m 5.3m/s 2.2m/s
02:00
0% 21°C 0mm 100% 0cm -49° 21°C 0.44mm 0.01kPa 59m 4.7m/s 2m/s
03:00
0% 21°C 0mm 100% 0cm -36° 21°C 0.63mm 0.01kPa 60m 4.7m/s 2m/s
04:00
0% 21°C 0.01mm 99% 0cm -22° 21°C 0.75mm 0.02kPa 63m 5.3m/s 2.3m/s
05:00
0% 21°C 0mm 99% 0cm -7.8° 21°C 0.88mm 0.01kPa 59m 5.4m/s 2.3m/s
06:00
0% 21°C 0mm 99% 0cm 6.7° 21°C 1.1mm 0.02kPa 59m 4.3m/s 2m/s
07:00
0% 21°C 0mm 99% 0cm 21° 21°C 0.25mm 0.03kPa 81m 5.1m/s 2.4m/s
08:00
0% 21°C 0mm 97% 0cm 36° 22°C 0.63mm 0.07kPa 120m 4.7m/s 2.6m/s
09:00
0% 22°C 0mm 94% 0cm 51° 23°C 1.2mm 0.17kPa 817m 4.9m/s 2.7m/s
10:00
0% 22°C 0mm 90% 0cm 65° 24°C 1.8mm 0.28kPa 827m 5.7m/s 3.3m/s
11:00
0% 22°C 0mm 91% 0cm 80° 23°C 2.6mm 0.26kPa 1215m 5.6m/s 3.2m/s
12:00
0% 22°C 0mm 91% 0cm 85° 23°C 3.3mm 0.25kPa 2293m 5.3m/s 3m/s
13:00
0% 22°C 0mm 90% 0cm 71° 23°C 0.38mm 0.27kPa 2541m 5.2m/s 3.1m/s
14:00
0% 22°C 0mm 90% 0cm 56° 23°C 0.94mm 0.27kPa 1074m 4.9m/s 3m/s
15:00
0% 22°C 0mm 91% 0cm 41° 23°C 1.6mm 0.26kPa 2483m 5.4m/s 3.3m/s
16:00
0% 22°C 0mm 96% 0cm 26° 22°C 2.5mm 0.1kPa 468m 5.8m/s 3.3m/s
17:00
0% 22°C 0mm 99% 0cm 12° 22°C 3.2mm 0.03kPa 111m 5.7m/s 2.7m/s
18:00
0% 21°C 0.03mm 100% 0cm -2.5° 21°C 3.7mm 0.01kPa 72m 5.4m/s 2.2m/s
19:00
0% 22°C 0.02mm 99% 0cm -17° 22°C 2.6mm 0.03kPa 1458m 3.9m/s 1.7m/s
20:00
0% 22°C 0.01mm 98% 0cm -31° 22°C 1.4mm 0.06kPa 2844m 2.3m/s 1.1m/s
21:00
0% 22°C 0mm 97% 0cm -45° 22°C 0.31mm 0.08kPa 4231m 0.72m/s 0.62m/s
22:00
0% 22°C 0.02mm 97% 0cm -57° 22°C 0.48mm 0.08kPa 3669m 0.73m/s 0.65m/s
23:00
0% 22°C 0.04mm 97% 0cm -66° 22°C 0.65mm 0.08kPa 3107m 0.74m/s 0.68m/s
Tue, Aug 25 Sunrise 05:29 Sunset 17:51
24:00
0% 22°C 0.06mm 97% 0cm -68° 22°C 0.81mm 0.08kPa 2545m 0.75m/s 0.71m/s
01:00
0% 22°C 0.04mm 92% 0cm -61° 24°C 0.73mm 0.24kPa 9004m 1.2m/s 0.8m/s
02:00
0% 23°C 0.02mm 87% 0cm -49° 25°C 0.65mm 0.42kPa 15463m 1.7m/s 0.88m/s
03:00
0% 23°C 0mm 81% 0cm -36° 26°C 0.56mm 0.63kPa 21922m 2.1m/s 0.96m/s
04:00
0% 23°C 0mm 82% 0cm -22° 26°C 1.5mm 0.62kPa 16493m 2.1m/s 1.3m/s
05:00
0% 24°C 0mm 83% 0cm -7.8° 27°C 2.4mm 0.6kPa 11063m 2.1m/s 1.6m/s
06:00
0% 24°C 0mm 84% 0cm 6.7° 27°C 3.3mm 0.57kPa 5634m 2.1m/s 2m/s
07:00
0% 24°C 0mm 85% 0cm 21° 27°C 4mm 0.51kPa 5331m 2.4m/s 2m/s
08:00
0% 24°C 0mm 87% 0cm 36° 26°C 4.8mm 0.45kPa 5029m 2.7m/s 2m/s
09:00
0% 24°C 0mm 89% 0cm 51° 26°C 5.5mm 0.39kPa 4726m 3m/s 2.1m/s
10:00
0% 24°C 0.23mm 91% 0cm 65° 25°C 6.7mm 0.28kPa 3939m 2.8m/s 1.9m/s
11:00
0% 23°C 0.45mm 94% 0cm 80° 24°C 7.9mm 0.18kPa 3151m 2.5m/s 1.7m/s
12:00
0% 23°C 0.68mm 97% 0cm 85° 24°C 9.1mm 0.1kPa 2364m 2.2m/s 1.5m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

How this forecast is made

Opportunities are threshold-based signals: PhotoWeather checks whether forecast conditions match the rules for a photography scenario. They are planning guidance, not guarantees. Forecasts can change as new model runs arrive, and confidence generally decreases farther into the forecast horizon, so recheck conditions before travelling.

The weather forecast foundation comes through Open-Meteo , which aggregates models from weather agencies. PhotoWeather applies condition-specific thresholds and derived calculations; not every condition uses every model or data input.

Forecast generated

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