Rule Fog Hunter

Fog Hunter Forecast for Sapa, Vietnam

Sa Pa, Lào Cai Province, Vietnam

Sapa's terrace walls wrap around steep valleys as dense contour lines. Paths, farmhouses, and field workers clarify the scale of cultivated slopes that would otherwise read as an abstract pattern.

20 matching opportunities in the 14-day forecast.

Hourly forecast scores

Forecast valid from Oct 9, 2026, 1:00 PM UTC (one hour; not an observation)

Fog Probability

Dewpoint Spread1.1°C

Visibility2040

Relative Humidity93%

Wind Speed0.4m/s

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Asia/Bangkok

First upcoming window

Dense Fog at Dusk

Sapa

Sun, Oct 11 · 18:00–19:00 · 1h window

Medium confidence

72%

🌫️Fog Probability100%

Dewpoint Spread: 0.0°C

Visibility: 300 (Fog)

Relative Humidity: 100%

Wind Speed: 0.2m/s (calm conditions)

Dense Fog

Sapa

Sun, Oct 11 · 19:00–05:00

🌫️Fog Probability:100%

High

Dense Fog at Sunrise

Sapa

Mon, Oct 12 · 05:00–07:00

🌫️Fog Probability:100%

High

Dense Fog

Sapa

Mon, Oct 12 · 07:00–08:00

🌫️Fog Probability:100%

Medium

Fog Potential at Dusk

Sapa

Mon, Oct 12 · 18:00–19:00

🌫️Fog Probability:82.2%

Low

Dense Fog

Sapa

Mon, Oct 12 · 19:00–05:00

🌫️Fog Probability:100%

High

Dense Fog at Sunrise

Sapa

Tue, Oct 13 · 05:00–07:00

🌫️Fog Probability:100%

High

+13 more windows in the next 14 days

71-hour requirements breakdown

When available, this detailed table covers only the stated 71-hour horizon (typically 72–168 hours, depending on available hourly data). Opportunity records above span the full 14-day forecast period, so this table does not explain that entire period. Times shown in Asia/Bangkok.

Requirements breakdown is temporarily unavailable or expired. This does not mean no opportunities.

Supporting forecast inputs

Additional hourly values for interpreting the forecast and any derived scores. See the separate requirements breakdown for rule logic; missing values are unavailable.

Forecast time (Asia/Bangkok)	Aerosol Optical Depth (550nm)	Clear Sky Probability (Ensemble)	Dew Point	Lifted Index	Rainfall	Relative Humidity	Snowfall	Solar Elevation	Temperature	Total Precipitation	Vapor Pressure Deficit	Visibility	Wind Gusts	Wind Speed
Fri, Oct 9, 2026Sunrise 05:58 · Sunset 17:44
20:00 Night	0.23	100%	14°C	3°C	0mm	93%	0cm	-32°	15°C	0mm	0.12kPa	2040m	3.2m/s	0.4m/s
21:00 Night	0.25	100%	13°C	3.7°C	0mm	89%	0cm	-46°	15°C	0mm	0.18kPa	1700m	3.1m/s	0.32m/s
22:00 Night	0.28	100%	12°C	4.3°C	0mm	87%	0cm	-59°	14°C	0mm	0.21kPa	1620m	2.8m/s	0.27m/s
23:00 Night	0.31	100%	11°C	5.2°C	0mm	85%	0cm	-70°	14°C	0mm	0.24kPa	1500m	2.8m/s	0.32m/s
Sat, Oct 10, 2026Sunrise 05:59 · Sunset 17:43
24:00 Night	0.33	100%	11°C	5.9°C	0mm	83%	0cm	-74°	14°C	0mm	0.27kPa	1560m	2.7m/s	0.32m/s
01:00 Night	0.34	100%	11°C	5.9°C	0mm	82%	0cm	-67°	14°C	0mm	0.28kPa	1760m	2.6m/s	0.28m/s
02:00 Night	0.34	98%	11°C	5.8°C	0mm	82%	0cm	-55°	14°C	0mm	0.28kPa	2060m	2.4m/s	0.21m/s
03:00 Night	0.34	95%	11°C	5.6°C	0mm	82%	0cm	-42°	14°C	0mm	0.28kPa	2480m	2.4m/s	0.25m/s
04:00 Night	0.35	93%	11°C	5.7°C	0mm	83%	0cm	-28°	14°C	0mm	0.27kPa	3020m	2.6m/s	0.28m/s
05:00 Night	0.36	93%	11°C	5.6°C	0mm	83%	0cm	-14°	14°C	0mm	0.27kPa	3680m	3m/s	0.4m/s
06:00	0.38	92%	11°C	5.7°C	0mm	84%	0cm	-0.03°	14°C	0mm	0.25kPa	4520m	3.2m/s	0.45m/s
07:00	0.38	92%	13°C	4.4°C	0mm	79%	0cm	13°	16°C	0mm	0.38kPa	5500m	4.2m/s	1.2m/s
08:00	0.38	91%	13°C	2.7°C	0mm	78%	0cm	26°	17°C	0mm	0.43kPa	6380m	5.2m/s	1.5m/s
09:00	0.38	89%	14°C	1.7°C	0mm	76%	0cm	39°	18°C	0mm	0.51kPa	7840m	6.4m/s	1.8m/s
10:00	0.38	88%	15°C	1.1°C	0mm	79%	0cm	50°	19°C	0.1mm	0.45kPa	5360m	6.9m/s	1.9m/s
11:00	0.38	86%	16°C	0.5°C	0.2mm	90%	0cm	58°	18°C	0.9mm	0.2kPa	7120m	7.6m/s	1.6m/s
12:00	0.37	84%	16°C	-0.3°C	0mm	89%	0cm	61°	18°C	0.1mm	0.22kPa	7840m	6.1m/s	1.6m/s
13:00	0.33	82%	16°C	-0.6°C	0.1mm	89%	0cm	57°	18°C	0.5mm	0.22kPa	4400m	5.9m/s	1.6m/s
14:00	0.29	76%	16°C	-2.4°C	0.9mm	99%	0cm	47°	16°C	1.4mm	0.02kPa	2300m	5.6m/s	1.2m/s
15:00	0.27	69%	16°C	-2.7°C	1.6mm	100%	0cm	36°	16°C	1.9mm	0kPa	740m	4.3m/s	1.2m/s
16:00	0.25	63%	16°C	-2.7°C	1mm	99%	0cm	23°	16°C	1mm	0.02kPa	1000m	4m/s	1m/s
17:00	0.22	60%	16°C	-1.6°C	0.7mm	100%	0cm	9.3°	16°C	0.7mm	0kPa	1140m	3.7m/s	1m/s
18:00 Night	0.2	58%	15°C	-0.6°C	0.3mm	99%	0cm	-4.4°	15°C	0.3mm	0.02kPa	780m	3.4m/s	0.93m/s
19:00 Night	0.18	55%	15°C	0.3°C	0.3mm	100%	0cm	-18°	15°C	0.3mm	0kPa	540m	3.6m/s	0.85m/s
20:00 Night	0.17	47%	15°C	1.2°C	0.5mm	100%	0cm	-32°	15°C	0.5mm	0kPa	800m	3.4m/s	0.56m/s
21:00 Night	0.17	39%	15°C	2.3°C	0.4mm	100%	0cm	-46°	15°C	0.8mm	0kPa	660m	3.7m/s	0.3m/s
22:00 Night	0.17	31%	15°C	2.4°C	0.7mm	100%	0cm	-59°	15°C	0.7mm	0kPa	520m	2.7m/s	0.1m/s
23:00 Night	0.18	30%	15°C	2.3°C	0.3mm	100%	0cm	-70°	15°C	0.3mm	0kPa	660m	2.6m/s	0.14m/s
Sun, Oct 11, 2026Sunrise 05:59 · Sunset 17:43
24:00 Night	0.19	29%	15°C	2°C	0mm	100%	0cm	-74°	15°C	0mm	0kPa	780m	2.5m/s	0.05m/s
01:00 Night	0.19	28%	15°C	1.7°C	0mm	99%	0cm	-67°	16°C	0mm	0.02kPa	860m	2.3m/s	0.07m/s
02:00 Night	0.2	26%	15°C	1.4°C	0mm	99%	0cm	-55°	16°C	0mm	0.02kPa	960m	2.2m/s	0.16m/s
03:00 Night	0.21	23%	15°C	1°C	0mm	98%	0cm	-42°	16°C	0mm	0.04kPa	1140m	2.1m/s	0.2m/s
04:00 Night	0.22	21%	15°C	0.4°C	0mm	97%	0cm	-28°	16°C	0mm	0.05kPa	1420m	2.2m/s	0.16m/s
05:00 Night	0.22	19%	15°C	0.4°C	0mm	97%	0cm	-14°	16°C	0mm	0.05kPa	1780m	2.2m/s	0.25m/s
06:00	0.21	18%	15°C	0.5°C	0mm	97%	0cm	-0.18°	16°C	0mm	0.05kPa	2160m	2.4m/s	0.36m/s
07:00	0.21	16%	15°C	0.3°C	0mm	97%	0cm	13°	16°C	0mm	0.05kPa	2560m	3.6m/s	1.1m/s
08:00	Unavailable	15%	16°C	0°C	0mm	94%	0cm	26°	17°C	0mm	0.11kPa	8720m	4.1m/s	0.96m/s
09:00	Unavailable	13%	15°C	-0.5°C	0mm	84%	0cm	39°	18°C	0mm	0.33kPa	18780m	4.8m/s	1.2m/s
10:00	Unavailable	12%	15°C	-0.9°C	0mm	76%	0cm	50°	20°C	0mm	0.55kPa	21040m	5.7m/s	1.6m/s
11:00	Unavailable	11%	15°C	-1.7°C	0mm	72%	0cm	58°	21°C	0mm	0.68kPa	9900m	6.2m/s	1.8m/s
12:00	Unavailable	11%	16°C	-2.1°C	0.4mm	77%	0cm	61°	20°C	0.6mm	0.54kPa	4780m	6.2m/s	1.5m/s
13:00	Unavailable	10%	15°C	-1.8°C	0.3mm	75%	0cm	56°	20°C	0.6mm	0.58kPa	4240m	5.6m/s	1.4m/s
14:00	Unavailable	17%	17°C	-2.2°C	0.3mm	82%	0cm	47°	20°C	0.5mm	0.42kPa	6540m	5.3m/s	1.3m/s
15:00	Unavailable	24%	17°C	-2.1°C	0.2mm	87%	0cm	35°	19°C	0.7mm	0.29kPa	6020m	4.9m/s	1.2m/s
16:00	Unavailable	31%	17°C	-2.3°C	0.3mm	90%	0cm	22°	19°C	0.7mm	0.22kPa	5420m	4.5m/s	1.1m/s
17:00	Unavailable	37%	17°C	-2.1°C	0.2mm	94%	0cm	9.1°	18°C	0.2mm	0.12kPa	9760m	3.7m/s	0.79m/s
18:00 Night	Unavailable	42%	17°C	-0.5°C	0mm	100%	0cm	-4.6°	17°C	0mm	0kPa	300m	2.5m/s	0.25m/s
19:00 Night	Unavailable	48%	16°C	0.6°C	0mm	100%	0cm	-19°	16°C	0mm	0kPa	200m	2.1m/s	0.32m/s
20:00 Night	Unavailable	60%	16°C	1.1°C	0mm	100%	0cm	-32°	16°C	0mm	0kPa	140m	2.4m/s	0.3m/s
21:00 Night	Unavailable	73%	15°C	1.5°C	0mm	100%	0cm	-46°	15°C	0mm	0kPa	100m	2.6m/s	0.3m/s
22:00 Night	Unavailable	85%	15°C	1.9°C	0mm	99%	0cm	-59°	15°C	0mm	0.02kPa	120m	2.9m/s	0.25m/s
23:00 Night	Unavailable	85%	15°C	2.3°C	0mm	100%	0cm	-70°	15°C	0mm	0kPa	120m	2.8m/s	0.15m/s
Mon, Oct 12, 2026Sunrise 05:59 · Sunset 17:42
24:00 Night	Unavailable	86%	15°C	2.5°C	0mm	100%	0cm	-75°	15°C	0mm	0kPa	180m	2.7m/s	0.05m/s
01:00 Night	Unavailable	86%	15°C	2.6°C	0mm	100%	0cm	-68°	15°C	0mm	0kPa	200m	2.4m/s	0.05m/s
02:00 Night	Unavailable	83%	14°C	2.6°C	0mm	100%	0cm	-56°	14°C	0mm	0kPa	200m	2.3m/s	0.1m/s
03:00 Night	Unavailable	79%	14°C	2.9°C	0mm	99%	0cm	-42°	14°C	0mm	0.02kPa	140m	2.3m/s	0.11m/s
04:00 Night	Unavailable	76%	14°C	2.9°C	0mm	99%	0cm	-28°	14°C	0mm	0.02kPa	140m	2.3m/s	0.16m/s
05:00 Night	Unavailable	74%	14°C	3°C	0mm	100%	0cm	-15°	14°C	0mm	0kPa	140m	2.4m/s	0.3m/s
06:00	Unavailable	73%	13°C	3.2°C	0mm	100%	0cm	-0.32°	13°C	0mm	0kPa	160m	2.4m/s	0.22m/s
07:00	Unavailable	71%	15°C	1.6°C	0mm	99%	0cm	13°	15°C	0mm	0.02kPa	260m	2.5m/s	0.4m/s
08:00	Unavailable	70%	16°C	-0.2°C	0mm	93%	0cm	26°	17°C	0mm	0.14kPa	520m	2.9m/s	0.69m/s
09:00	Unavailable	68%	16°C	-0.8°C	0mm	82%	0cm	39°	19°C	0mm	0.39kPa	1680m	3.9m/s	0.88m/s
10:00	Unavailable	67%	15°C	-1.5°C	0mm	71%	0cm	50°	21°C	0mm	0.71kPa	3700m	4m/s	0.82m/s
11:00	Unavailable	66%	16°C	-1.5°C	0mm	70%	0cm	58°	22°C	0mm	0.77kPa	6980m	5.3m/s	1.4m/s
12:00	Unavailable	64%	17°C	-1.4°C	0mm	71%	0cm	60°	22°C	0mm	0.77kPa	8340m	5.5m/s	1.4m/s
13:00	Unavailable	63%	17°C	-1.6°C	0.1mm	74%	0cm	56°	22°C	0.3mm	0.67kPa	5660m	5.5m/s	1.2m/s
14:00	Unavailable	60%	17°C	-1.8°C	0.2mm	74%	0cm	47°	22°C	0.3mm	0.67kPa	9420m	5m/s	0.96m/s
15:00	Unavailable	57%	17°C	-2.4°C	0mm	74%	0cm	35°	22°C	0.1mm	0.67kPa	21540m	4.5m/s	1.1m/s
16:00	Unavailable	54%	17°C	-2.4°C	0mm	81%	0cm	22°	20°C	0mm	0.45kPa	9100m	4.5m/s	1.3m/s
17:00	Unavailable	58%	17°C	-2.4°C	0mm	90%	0cm	8.9°	19°C	0.1mm	0.22kPa	10560m	4.3m/s	1m/s
18:00 Night	Unavailable	61%	18°C	-1.2°C	0mm	100%	0cm	-4.8°	18°C	0mm	0kPa	9160m	3.1m/s	0.43m/s
19:00 Night	Unavailable	65%	17°C	-0.8°C	0mm	100%	0cm	-19°	17°C	0mm	0kPa	640m	1.8m/s	0.35m/s

How this forecast is evaluated

See which weather signals PhotoWeather uses to identify Fog Hunter conditions across Vietnam. The requirements and hourly values above show how those signals apply at Sapa.

Explore Fog Hunter conditions across Vietnam →

Recorded match history

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

Last 30 days

recorded matching windows · 84% average confidence

Last 90 days

recorded matching windows · 84% average confidence

Last 365 days

recorded matching windows · 79% average confidence

Most frequent recorded start hour

05:00 local time, shared by 22 of 97 matches recorded in the last 365 days.

Most represented month

September, with 40 of 97 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.

Create your own Fog Hunter alerts

Get notified when these conditions match at your own locations.

Get this template

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.

How opportunities work → Weather data sources →

Get Notified of Opportunities

Create your own custom alerts for this location and more.

Create Free Account