Rule Fog Hunter

Fog Hunter Forecast for Ullswater, Lake District

Penrith, England, United Kingdom

Ullswater bends through three distinct reaches, so headlands repeatedly overlap the long lake and conceal its full length. Around Glenridding and Pooley Bridge, steamer piers, boathouses, and wooded bays provide built foregrounds beneath the Helvellyn and High Street fells.

4 matching opportunities in the 14-day forecast.

Hourly forecast scores

Forecast valid from Sep 20, 2026, 5:00 AM UTC (one hour; not an observation)

Fog Probability

Dewpoint Spread3.9°C

Visibility37320

Relative Humidity77%

Wind Speed6.6m/s

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/London

First upcoming window

Fog Potential

Ullswater

Mon, Sep 21 · 23:00–01:00 · 2h window

Low confidence

26%

🌫️Fog Probability77.1%

Dewpoint Spread: 0.3°C

Visibility: 9500 (Moderate)

Relative Humidity: 98%

Wind Speed: 0.9m/s (calm conditions)

Fog Potential

Ullswater

Fri, Sep 25 · 22:00–02:00

🌫️Fog Probability:86-91.1%

Medium

Misty Conditions

Ullswater

Sat, Oct 3 · 02:00–06:00

🌫️Fog Probability:86-100%

Medium

Dense Fog at Sunrise

Ullswater

Sat, Oct 3 · 06:00–09:00

🌫️Fog Probability:98.5-100%

High

72-hour requirements breakdown

When available, this detailed table covers only the stated 72-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 Europe/London.

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 (Europe/London)	Clear Sky Probability (Ensemble)	Dew Point	Rainfall	Relative Humidity	Snowfall	Solar Elevation	Temperature	Total Precipitation	Vapor Pressure Deficit	Visibility	Wind Gusts	Wind Speed
Sun, Sep 20, 2026Sunrise 06:53 · Sunset 19:15
06:00 Night	97%	7.9°C	0mm	77%	0cm	-8.4°	12°C	0mm	0.32kPa	37320m	13m/s	6.6m/s
07:00	97%	7.6°C	0mm	77%	0cm	0.6°	12°C	0mm	0.31kPa	40780m	12m/s	5.9m/s
08:00	87%	8.4°C	0mm	79%	0cm	8.9°	12°C	0mm	0.29kPa	39520m	12m/s	6.1m/s
09:00	77%	8.6°C	0mm	78%	0cm	17°	12°C	0mm	0.31kPa	43320m	13m/s	6.6m/s
10:00	67%	8.5°C	0mm	76%	0cm	25°	13°C	0mm	0.35kPa	45560m	11m/s	5.5m/s
11:00	61%	8.7°C	0mm	75%	0cm	31°	13°C	0mm	0.37kPa	48020m	12m/s	5.9m/s
12:00	55%	8.4°C	0mm	72%	0cm	35°	13°C	0mm	0.43kPa	51240m	13m/s	6.6m/s
13:00	49%	8.6°C	0mm	71%	0cm	36°	14°C	0mm	0.46kPa	52580m	13m/s	6.8m/s
14:00	44%	8.8°C	0mm	71%	0cm	35°	14°C	0mm	0.46kPa	55780m	14m/s	6.9m/s
15:00	39%	9°C	0mm	70%	0cm	31°	14°C	0mm	0.49kPa	53520m	11m/s	5.5m/s
16:00	34%	8°C	0mm	66%	0cm	26°	14°C	0mm	0.55kPa	58040m	10m/s	5m/s
17:00	28%	6.8°C	0mm	61%	0cm	18°	14°C	0mm	0.63kPa	61640m	10m/s	5m/s
18:00	23%	7.1°C	0mm	65%	0cm	10°	14°C	0mm	0.54kPa	58880m	8.8m/s	4.1m/s
19:00	17%	7.9°C	0mm	71%	0cm	1.8°	13°C	0mm	0.43kPa	52960m	5.6m/s	2.1m/s
20:00 Night	12%	7.6°C	0mm	77%	0cm	-7.2°	12°C	0mm	0.31kPa	48880m	3.8m/s	1.6m/s
21:00 Night	8%	7.9°C	0mm	81%	0cm	-15°	11°C	0mm	0.25kPa	48360m	3.3m/s	1.3m/s
22:00 Night	3%	8.3°C	0mm	80%	0cm	-23°	12°C	0mm	0.27kPa	48520m	4.1m/s	1.9m/s
23:00 Night	4%	7.9°C	0mm	82%	0cm	-29°	11°C	0mm	0.23kPa	47160m	2.8m/s	0.9m/s
Mon, Sep 21, 2026Sunrise 06:55 · Sunset 19:12
24:00 Night	4%	7.9°C	0mm	81%	0cm	-33°	11°C	0mm	0.25kPa	48020m	2.8m/s	1m/s
01:00 Night	5%	8.8°C	0mm	82%	0cm	-35°	12°C	0mm	0.25kPa	44220m	4m/s	1.8m/s
02:00 Night	5%	8.7°C	0mm	85%	0cm	-33°	11°C	0mm	0.2kPa	40920m	2.8m/s	1m/s
03:00 Night	5%	9.2°C	0mm	79%	0cm	-30°	13°C	0mm	0.31kPa	42620m	4.5m/s	2.2m/s
04:00 Night	5%	9.1°C	0mm	81%	0cm	-24°	12°C	0mm	0.27kPa	40360m	6.4m/s	3.1m/s
05:00 Night	3%	9.8°C	0mm	85%	0cm	-17°	12°C	0mm	0.21kPa	37720m	6.1m/s	2.9m/s
06:00 Night	2%	11°C	0mm	86%	0cm	-8.7°	13°C	0mm	0.21kPa	36000m	6.6m/s	3.1m/s
07:00	0%	11°C	0mm	88%	0cm	0.37°	13°C	0mm	0.18kPa	35200m	10m/s	5.1m/s
08:00	0%	12°C	0mm	88%	0cm	8.6°	14°C	0mm	0.19kPa	33680m	9.3m/s	4.6m/s
09:00	0%	12°C	0mm	86%	0cm	17°	14°C	0mm	0.22kPa	34340m	7.9m/s	3.9m/s
10:00	0%	12°C	0mm	88%	0cm	24°	14°C	0mm	0.19kPa	32540m	11m/s	5.4m/s
11:00	0%	13°C	0mm	89%	0cm	30°	14°C	0mm	0.18kPa	23360m	12m/s	6.1m/s
12:00	0%	14°C	0mm	89%	0cm	34°	16°C	0mm	0.19kPa	32340m	11m/s	5.7m/s
13:00	0%	14°C	0mm	92%	0cm	36°	15°C	0mm	0.14kPa	25120m	10m/s	5.3m/s
14:00	0%	15°C	0mm	95%	0cm	35°	15°C	0mm	0.09kPa	15840m	11m/s	5.4m/s
15:00	0%	14°C	0mm	97%	0cm	31°	15°C	0mm	0.05kPa	9620m	10m/s	5.3m/s
16:00	0%	14°C	0mm	92%	0cm	25°	16°C	0mm	0.14kPa	14720m	8.8m/s	4.6m/s
17:00	0%	14°C	0mm	95%	0cm	18°	15°C	0mm	0.09kPa	11000m	8.5m/s	4.3m/s
18:00	0%	15°C	0mm	92%	0cm	9.8°	16°C	0mm	0.15kPa	17600m	5.5m/s	2.7m/s
19:00	0%	15°C	0mm	95%	0cm	1.4°	16°C	0mm	0.09kPa	15320m	5.1m/s	2.4m/s
20:00 Night	1%	15°C	0mm	98%	0cm	-7.5°	15°C	0mm	0.03kPa	10460m	3.9m/s	1.7m/s
21:00 Night	3%	15°C	0mm	97%	0cm	-16°	15°C	0mm	0.05kPa	12480m	3.3m/s	1.4m/s
22:00 Night	4%	15°C	0mm	97%	0cm	-23°	15°C	0mm	0.05kPa	11680m	2.9m/s	1.1m/s
23:00 Night	3%	15°C	0mm	98%	0cm	-29°	15°C	0mm	0.03kPa	9500m	2.3m/s	0.9m/s
Tue, Sep 22, 2026Sunrise 06:57 · Sunset 19:10
24:00 Night	2%	15°C	0mm	98%	0cm	-33°	15°C	0mm	0.03kPa	10660m	2.5m/s	1.3m/s
01:00 Night	1%	15°C	0mm	97%	0cm	-35°	15°C	0mm	0.05kPa	13660m	2.4m/s	0.8m/s
02:00 Night	1%	14°C	0mm	97%	0cm	-34°	15°C	0mm	0.05kPa	12825m	3.2m/s	1.5m/s
03:00 Night	0%	15°C	0mm	98%	0cm	-30°	15°C	0mm	0.03kPa	12760m	2.5m/s	1.1m/s
04:00 Night	0%	14°C	0mm	97%	0cm	-24°	15°C	0mm	0.05kPa	11805m	2.5m/s	1.3m/s
05:00 Night	0%	15°C	0mm	96%	0cm	-17°	15°C	0mm	0.07kPa	12100m	3m/s	1.7m/s
06:00 Night	1%	15°C	0mm	96%	0cm	-9°	15°C	0mm	0.07kPa	11720m	3.6m/s	2.1m/s
07:00	1%	15°C	0mm	95%	0cm	0.15°	16°C	0mm	0.09kPa	11320m	4m/s	2.3m/s
08:00	1%	15°C	0mm	95%	0cm	8.3°	15°C	0mm	0.09kPa	9080m	5m/s	3m/s
09:00	2%	15°C	0mm	93%	0cm	17°	16°C	0mm	0.13kPa	8700m	6.7m/s	3.8m/s
10:00	2%	15°C	0mm	91%	0cm	24°	17°C	0mm	0.17kPa	8300m	7.9m/s	4.4m/s
11:00	2%	16°C	0.1mm	90%	0cm	30°	17°C	0.1mm	0.2kPa	7680m	8m/s	4.4m/s
12:00	2%	16°C	0.1mm	89%	0cm	34°	18°C	0.1mm	0.22kPa	7080m	7.7m/s	4.1m/s
13:00	2%	16°C	0.1mm	89%	0cm	36°	18°C	0.1mm	0.22kPa	6460m	7.3m/s	3.9m/s
14:00	3%	16°C	0.1mm	89%	0cm	34°	18°C	0.1mm	0.22kPa	9000m	7.2m/s	3.9m/s
15:00	3%	16°C	0.1mm	89%	0cm	31°	18°C	0.1mm	0.22kPa	11520m	7.2m/s	3.8m/s
16:00	4%	15°C	0.1mm	89%	0cm	25°	17°C	0.1mm	0.22kPa	14060m	7m/s	3.8m/s
17:00	4%	15°C	0mm	90%	0cm	18°	17°C	0mm	0.19kPa	14860m	6.5m/s	3.6m/s
18:00	3%	15°C	0mm	92%	0cm	9.4°	16°C	0mm	0.15kPa	15680m	5.9m/s	3.4m/s
19:00	3%	15°C	0mm	94%	0cm	1.1°	16°C	0mm	0.11kPa	16480m	5.5m/s	3.3m/s
20:00 Night	5%	14°C	0mm	95%	0cm	-7.9°	15°C	0mm	0.09kPa	13700m	5.6m/s	3.3m/s
21:00 Night	7%	14°C	0mm	96%	0cm	-16°	15°C	0mm	0.07kPa	10900m	6m/s	3.5m/s
22:00 Night	9%	14°C	0mm	96%	0cm	-24°	15°C	0mm	0.07kPa	8120m	6.3m/s	3.6m/s
23:00 Night	8%	14°C	0mm	96%	0cm	-30°	15°C	0mm	0.07kPa	7960m	6.5m/s	3.7m/s
Wed, Sep 23, 2026Sunrise 06:59 · Sunset 19:07
24:00 Night	6%	14°C	0mm	95%	0cm	-34°	15°C	0mm	0.08kPa	7780m	6.6m/s	3.8m/s
01:00 Night	5%	14°C	0mm	95%	0cm	-35°	15°C	0mm	0.08kPa	7620m	6.9m/s	3.9m/s
02:00 Night	4%	14°C	0.1mm	95%	0cm	-34°	15°C	0.1mm	0.08kPa	6920m	7.3m/s	4.1m/s
03:00 Night	2%	14°C	0.1mm	95%	0cm	-30°	15°C	0.1mm	0.08kPa	6240m	7.9m/s	4.4m/s
04:00 Night	1%	14°C	0.1mm	95%	0cm	-25°	15°C	0.1mm	0.08kPa	5540m	8.3m/s	4.6m/s
05:00 Night	1%	13°C	1.9mm	95%	0cm	-17°	14°C	1.9mm	0.08kPa	4800m	8.5m/s	4.6m/s

How this forecast is evaluated

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

Explore Fog Hunter conditions across Lake District →

Recorded match history

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

Last 30 days

recorded matching windows · 85% average confidence

Last 90 days

recorded matching windows · 82% average confidence

Last 365 days

recorded matching windows · 81% average confidence

Most frequent recorded start hour

02:00 local time, shared by 4 of 15 matches recorded in the last 365 days.

Most represented month

July, with 7 of 15 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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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 →

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