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Ben Lomond, Stirling

56.19°N, 4.63°W · ~974m · 06:59 – 19:23
Updated 16:18
Temp
7°C
→ steady / 1hr
Wind
16.6
↓ 0.2 / 1hr
Condition
Sunny intervals
Sunny intervals
Score
3.9
Poor
Time
Condition
Precip mm
Precip %
Temp
Temp °C
Feels °C
Wind
Direction
Wind mph
Gust mph
Detail
Humidity %
Pressure
Vis km
UV Index
CAPE J/kg
Score
Sun 20 Sep Mon 21 Sep Tue 22 Sep Wed 23 Sep Thu 24 Sep Fri 25 Sep Sat 26 Sep Sun 27 Sep
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Sunny intervals Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Light drizzle Moderate drizzle Light drizzle Light drizzle Light drizzle Light drizzle Light drizzle Light drizzle Light drizzle Light drizzle Overcast Light drizzle Light drizzle Light drizzle Light drizzle Light drizzle Overcast Light drizzle Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Light drizzle Light drizzle Moderate drizzle Moderate drizzle Light rain Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Mostly cloudy Sunny intervals Mostly sunny Mostly sunny Mostly sunny Clear near sunset Clear Clear Clear Mostly clear Mostly cloudy Overcast Overcast Overcast Mostly cloudy Mostly cloudy Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Light drizzle Light drizzle Light drizzle Moderate drizzle Moderate drizzle Moderate drizzle Moderate rain Moderate rain Moderate rain Moderate rain Moderate rain Moderate rain Moderate drizzle Moderate drizzle Moderate drizzle Overcast Overcast Overcast Overcast Overcast Overcast Light drizzle Light drizzle Light drizzle Mostly cloudy Mostly sunny Mostly sunny Sunny Sunny Clear near sunset Clear Clear Clear Clear Clear Clear Clear Mostly clear Partly cloudy Mostly cloudy Mostly cloudy Overcast Overcast Overcast Overcast Overcast Overcast Mostly cloudy Mostly cloudy Sunny intervals Mostly sunny Mostly sunny Mostly sunny Mostly clear near sunset Clear Mostly clear Partly cloudy Partly cloudy Mostly cloudy
- - - - - - - - - - - - - - 0.3 0.6 0.2 0.4 0.1 0.1 0.1 0.1 0.2 0.1 - 0.1 0.3 0.1 0.2 0.3 - 0.1 - - - - - - - - - - - - 0.3 0.4 0.5 0.4 0.1 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 0.1 0.1 0.1 0.7 0.7 0.7 1.7 1.7 1.7 2.8 2.8 2.8 0.6 0.6 0.6 - - - - - - 0.1 0.1 0.1 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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W W W W W W WSW WSW WSW SW SSW S S S S S S S S SSW SSW SSW S SSW SSW WSW W WSW SW W WSW SW SSW SSW SSW SSW SW SSW SSW SW SSW SSW SSW SSW SW SW WSW WSW WNW NW NW NW WNW WNW W WNW WNW WNW NW NW NW NW NW NW NW NW NW NW NW NW NW WNW WNW WNW WNW WNW W W WSW WSW W W W WNW WNW SW S SE SE SE SE SSE SSE S S S S S S S S S SSW SSW SW WSW WSW WSW WSW WSW WSW SW SW SW SW SW WSW WSW WSW WSW WSW WSW WSW WSW WSW SW SW SW SSW S S S S S S S S S S S SSW SSW SSW SSW SSW S S S S S S S S
17 16 14 11 11 10 8 7 7 7 8 9 10 10 8 9 6 6 7 7 6 8 8 7 6 8 7 5 4 4 5 2 7 8 10 10 9 9 9 11 13 11 10 11 12 11 9 6 5 5 5 4 4 3 2 2 2 2 3 4 4 4 3 2 2 2 2 4 5 7 8 10 11 10 9 7 5 3 2 2 2 2 2 2 2 1 1 1 1 2 4 7 10 13 15 15 16 16 16 15 16 17 17 16 14 13 11 10 9 8 7 7 8 9 10 10 11 11 11 12 12 10 9 7 6 6 5 3 3 2 2 2 2 2 3 4 5 7 9 11 12 13 13 12 11 9 8 7 7 8 8 9 9
32 31 27 21 21 19 16 14 14 14 15 17 20 19 16 17 11 12 14 14 13 15 16 15 13 15 14 11 9 8 11 5 13 16 20 19 18 17 19 21 25 21 19 20 23 21 17 12 11 11 9 8 8 6 4 3 3 3 4 6 7 7 5 4 4 4 5 8 11 15 18 21 22 21 18 14 10 6 2 2 3 3 3 2 2 2 1 2 4 6 9 14 20 25 28 30 31 31 30 30 31 32 32 31 28 26 23 20 18 16 15 14 15 18 20 21 22 23 24 25 24 21 17 14 13 12 11 7 6 5 4 4 4 4 5 6 9 13 17 21 24 26 25 23 21 18 15 14 14 15 16 17 19
 
84 81 80 85 87 90 83 79 79 75 77 79 85 88 92 94 98 97 99 100 99 99 99 99 99 100 100 100 99 100 97 98 99 97 98 97 96 95 96 96 95 96 97 96 99 100 98 94 88 86 86 86 87 88 90 91 93 94 95 96 96 96 96 96 95 94 91 84 76 70 68 69 71 73 75 78 83 90 95 97 97 97 98 98 99 100 100 99 96 93 89 85 81 78 76 74 75 80 87 93 96 97 97 97 97 96 95 95 94 94 93 93 93 93 92 90 88 85 80 74 70 71 75 79 83 88 92 91 95 97 99 100 100 100 100 99 97 93 89 85 82 79 77 76 76 76 76 77 79 81 84 87 90
917 918 918 919 919 920 920 920 920 921 921 920 920 920 920 920 920 921 921 921 921 921 921 921 921 921 921 921 921 921 921 921 921 920 920 920 920 919 919 919 920 920 920 920 920 920 920 920 920 919 919 919 919 919 919 918 918 917 917 916 916 916 915 915 915 915 915 916 916 916 917 917 917 917 918 918 918 917 917 917 917 917 916 916 916 915 914 914 914 915 915 915 914 913 913 912 911 910 909 908 908 907 906 906 906 906 906 906 906 906 906 907 908 908 909 910 910 910 911 911 912 912 912 912 912 912 912 912 912 911 911 911 911 911 911 910 910 911 911 911 911 911 911 910 910 909 908 908 907 907 906 905 905
33.5 44.1 44.1 39.9 39.1 36.6 44.3 47.5 46 48.3 46.3 41.7 40.4 26.7 13.4 13.2 6.1 6.8 3 2.3 2.7 2 2.1 5.5 2.4 1.8 1.1 2.2 4.1 1.4 13.8 12.2 4.6 16.3 16.2 17.2 22.3 24.9 22.7 22 23.1 20.8 17.2 18.6 3.5 1.3 3.9 11.8 25.9 22.4 22.5 22.7 21.7 21.1 20.4 19.5 18.5 17.6 17 16.4 15.8 15.4 15 14.6 16.3 18.1 19.8 21.9 24.1 26.2 26.1 26 25.9 25.5 25 24.6 22.1 19.6 17.1 16.1 15.1 14.1 12.7 11.3 9.9 8.8 7.6 6.5 11.3 16.1 20.9 22 23.1 24.2 17.7 11.3 4.8 4.6 4.3 4 3.6 3.2 2.8 2.9 3 3 3.7 4.4 5 9.4 13.7 18 17.5 17 16.5 18.6 20.7 22.7 22.5 22.4 22.2 22.6 23 23.5 21.8 20.1 18.5 17 15.5 14 13 12 11.1 10.1 9.1 8.2 9.2 10.3 11.3 12.4 13.4 14.4 16.1 17.8 19.4 21.1 22.8 24.4 23.4 22.4 21.4 20.4 19.4
0.4 0.3 - - - - - - - - - - - - - - - 0.2 0.3 0.4 0.7 0.6 0.6 0.6 0.3 0.2 - - - - - - - - - - - - - - - 0.2 0.3 0.3 0.3 0.3 0.3 0.9 0.7 1 0.5 0.1 - - - - - - - - - - - - 0.4 0.8 1.3 1.7 1.9 2 2.4 2.7 2.5 1.8 0.9 0.1 - - - - - - - - - - - - 0.3 0.8 1.3 1.7 1.9 2 1.9 1.7 1.3 0.9 0.4 - - - - - - - - - - - - - 0.3 0.8 1.2 1.6 1.8 2 2.4 2.8 2.5 1.7 0.9 0.1 - - - - - - - - - - - - 0.3 0.8 1.2 1.7 2.1 2.3 2.5 2.5 2.2 1.6 0.8 - - - - - -
20 20 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 10 10 20 30 10 0 10 20 20 20 0 0 0 0 10 20 18 10 10 0 0 0 0 0 0 0 0 0 0 0 0 0 10 30 40 30 20 20 40 80 90 70 30 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 10 20 20 20 10 0 0 0 0 0 0 0 10 10 20 20 20 20 30 40 50 80 110 130 130 120 110 100 90 70 50 20 0 0 0 0 0 0 0 0 0 0 0 0 0 10 30 50 60 80 80 80 60 50 30 10 0 0 0 0 0 0
2.4 2.5 3.4 4.8 4.9 5.3 5.8 6.2 6.3 6.2 5.9 5.7 5.0 5.2 5.6 5.3 6.6 6.4 6.2 6.2 6.4 6.0 5.7 6.0 6.6 5.9 6.0 6.7 7.1 7.3 6.9 8.7 6.4 5.8 5.0 5.2 5.4 5.5 5.3 4.7 3.9 4.6 5.0 4.9 4.2 4.4 5.2 6.4 6.9 7.0 7.2 7.4 7.4 8.8 8.8 8.8 8.8 8.8 8.8 8.8 7.4 8.8 8.8 8.8 8.8 8.8 8.8 7.5 6.9 6.2 6.8 6.2 5.9 6.2 6.7 7.4 8.2 10.0 10.0 10.0 10.0 8.8 8.8 8.8 10.0 10.0 8.8 8.8 8.8 8.8 7.3 6.3 5.0 3.9 3.2 2.8 2.6 2.1 2.2 2.3 1.4 1.2 1.1 0.7 1.3 1.9 4.0 4.6 5.1 5.9 6.1 6.2 6.0 5.5 5.1 4.8 4.6 4.5 5.5 5.3 5.4 6.0 6.8 7.4 7.7 7.9 8.1 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 8.8 7.2 6.4 5.6 4.8 4.1 5.0 5.0 5.5 6.1 6.6 7.1 7.4 7.4 7.3 7.0 6.8 6.5
Best Activity Window
WeatherDuck score WeatherDuck score Wind matters most. Rain comes next. Sky only nudges it. Temperature is off by default because layers and kit change comfort.
Day average
3.9/10
Windy, dull day
Best window
19:00-22:00
avg 5.0/10
Day average: 3.9/10
Best window: 19:00-22:00 · Avg 5.0
06:00 · Past
07:00 · Past
08:00 · Past
09:00 · Past
10:00 · Past
11:00 · Past
12:00 · Past
13:00 · Past
14:00 · Past
15:00 · Past
16:00 · 2.4/10
17:00 · 2.5/10
18:00 · 3.4/10
19:00 · 4.8/10
20:00 · 4.9/10
21:00 · 5.3/10
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
What this shows
The selected day from 06:00 to 21:00, scored from 0-10. The top line gives the day average and strongest window; the bars show how conditions rise and fall through that activity window. WeatherDuck score — Wind up to 5 mph (matters a lot) · Rain none at all (matters a fair bit) · Sky At least Mostly cloudy (matters a fair bit).
Score Customiser
WeatherDuck score
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These factors shape your score — set a comfy range for each, and how much it matters. Add more from the tray, or remove ones you don't care about. The bars update instantly.

Wind
Comfy range up to 5 mph
How much it matters
matters a lot
Rain
Comfy range none at all
How much it matters
matters a fair bit
Sky
Comfy range At least Mostly cloudy
How much it matters
matters a fair bit
Temperature
Comfy range 0 – 25°C
How much it matters
matters a fair bit
Time of day
Comfy range any time of day
How much it matters
matters a fair bit
UV
Comfy range any UV level
How much it matters
matters a fair bit
Wind direction
Comfy range any direction
How much it matters
matters a fair bit
Visibility
Comfy range at least 5 km
How much it matters
matters a fair bit
Not counted — tap to add
Day briefing

Wet and windy for much of the day

8° / 4° · Today · Sun 20

Persistent rain most likely in morning. Westerly winds averaging around 13 mph with peaks near 20 mph, gusting to 39 mph. Temperatures range from 4C to 8C with largely cloudy skies.

9.1 mm
Rain total
20 mph W
Wind max
gusts 39 mph
1.3
UV max
peak 13:00
Low
Pollen
Grass
26
Air quality
Fair
Very low
Thunder
CAPE 70
Atmosphere
Cloud avg 98%
Freezing level 1,580 mup to 3,390 m
Fog risk Low
Sun & Moon
06:59 / 19:23
Sun ↑↓
12 h 23 m
Daylight
17:36 / 00:02
Moon ↑↓
Waxing Gibbous
Moon phase
65% lit
Live rain radar
LIVE
Loading radar…
--:--
Light Moderate Heavy
Radar data by RainViewer
Is it muddy out there? 6 mm last 24 h · free account unlocks the verdict Sign up →
Ground conditions
Is it muddy out there?
A free account unlocks the local dryness verdict. No payment details.
6 mm
Last 24 h
73.4 mm
Last 7 days
Measured at Comer Farm rain gauge, 2.3 km away
Create a free account
Rain gauges and totals stay free for everyone
What to wear
Light showers possible and sub-zero wind chill; full winter layers, wind protection critical.
LayerItemMaterialWhy
Base Thermal base layer Heavyweight merino or synthetic thermal; avoid cotton -1°C feels temp
Mid Heavy fleece Heavy fleece or synthetic fill; not down (rain forecast) Wind chill feels like -1°C
Outer Waterproof jacket Lightweight breathable shell with a hood; you may not need it all day Light drizzle with 2.4mm forecast
Lower Insulated trousers Softshell or fleece-lined walking trousers Sub-zero wind chill on exposed legs
Feet Insulated waterproof boots Stiff sole for frozen ground, thick socks (wool blend) Frozen ground, ice risk
Extras Warm hat, thick gloves, balaclava Windproof gloves, spare pair. Consider microspikes for ice Feels like -1°C with a risk to exposed skin
Layer up. Plan to wear the main protection from the start.
Wear from the start 5 pieces
Add before you go Weather protection

Tap an item to see why

Essential Recommended Guidance

Guidance based on the forecast, not professional safety advice. Always use your own judgement. BMC layering guide →

Essential Recommended
This is general guidance based on forecast data, not professional safety advice. Always use your own judgement. BMC layering guide →
Inversion Outlook Forecast source Met Office Seamless
UKV 2 km with UKMO Global fallback
Likelihood labels describe the model signal, not an exact percentage chance.
Morning 00:00–12:00 · Afternoon 12:00–00:00
Up to two qualifying hours before midnight join the next morning. Loch Lomond, Trossachs & Argyll region
Unlikely
Sunday afternoon BEST
No clear window yet.
SUN AFTERNOON
No clear window
Unlikely
MON MORNING
No clear window
Unlikely
MON AFTERNOON
No clear window
Unlikely
Tap a period for detail
Key Factors What we look for

Our inversion forecast combines five weather factors and how long favourable conditions are expected to last.

S1 · Inversion
Warm air sitting above cooler valley air — the essential ingredient for a cloud sea.
S2 · Moist Below
Whether the valley air is damp enough to form and hold cloud.
S3 · Moisture Contrast
A sharp boundary between the cloudy valley and the dry air above it.
S4 · Clear Above
Clear, dry air above the cloud layer — the better this is, the cleaner the summit views.
S5 · Wind Calm
Light winds at low levels to keep the inversion intact and the cloud sea flat.
Duration
How long the conditions hold — a sustained event gives more time to get above the clouds.
Temperature lid
0%
Valley moisture
100%
Layer contrast
0%
Summit clarity
0%
Wind speed
1%
Duration
0h
No temperature inversion detected
Valley air moist enough
No moisture contrast, diffuse profile
Saturated above, no clear cap
Too windy, mixing likely
No sustained favourable window
Create Free Account for 1 Alert
Loading…
Cloud Inversion Heatmap About this map A shaded area means several nearby locations agree — amber for possible, green for likely, blue for very likely. The bands always sit inside one another, so stronger signals appear more solid.
The purple dot marks your location.
Drag the timeline to see how the chance changes through the night.
Very likely Likely Possible
Atmospheric Profile · Arrochar · 4 m
Loading… Timeline
Atmospheric profile data for Ben Lomond,GB
Surface Pressure

Humidity at Pressure Levels

Tap heights to compare both charts.

Higher humidity means the air is closer to saturation.

Temperature at Pressure Levels

Tap heights to compare both charts.

Warmer air above cooler air can indicate an inversion.

All heights shown equally.

Golden Hour
Today
DARKNESS
DAYLIGHT
06:14
06:39
06:59 Sunrise
07:19
07:44
Golden Hour · 40 min
Be at your summit by 06:39
Allow time to set up before the light show begins.
Monthly Inversion Chance
Illustrative relative chance by season
Illustrative — typical UK pattern
J
F
M
A
M
J
J
A
S
O
N
D
~2 proper inversion days per year. Mostly late autumn to spring.

Cloud inversions explained

What is a cloud inversion near Ben Lomond, Stirling?

A cloud inversion happens when cool, moist air becomes trapped in valleys beneath warmer air above. If the trapped moisture turns into fog or low cloud, the hills can rise through it into clearer air and sunshine. From a summit, the result can look like a wide sea of cloud with only the higher peaks visible.

The best chance near Ben Lomond, Stirling is a calm, settled night with moist valley air, a warm lid above and clearer, drier air over the tops. The bands on this page, from Unlikely to Very likely, describe the strength of that overall signal rather than a percentage promise, so always check timing, estimated cloud height and wind before setting off.

How to read this page. The headline outlook covers the surrounding region. Key Factors and the Atmospheric Profile describe the nearest available atmospheric profile.

See the dedicated Ben Lomond cloud inversion page Read the full UK cloud inversion guide See how WeatherDuck forecasts inversions
Tonight's Stargazing
0
Very poor conditions Skies look closed in — best to wait it out.
Waxing Gibbous Moon Waxing Gibbous 68%
Overcast Cloud Cover Overcast 100%
Moon Times Rise 17:36 · Set 00:02
Sky Clarity 37 km Clear
Lunar Day Day 9.1
Light Pollution View map ↓
Tonight's Aurora
Aurora & Solar Wind NOAA
1.7 Planetary Kp Very Low
Wind Speed 408 km/s
Bz 2.3 nT
Density 1.7 p/cm³
Bt 5.1 nT
No significant aurora activity expected tonight.
Observed 15:09 UTC · cached 5 min

Nightly Outlook

Tonight · 20 Sep

Waxing Gibbous · 68% illuminated

0/100
No good window tonight 100% cloud cover all night
Moon height above horizon Daylight
18:00–10:00 next morning
Moonset 00:02 Sunset 19:23Sunrise 07:01
Every hour in detail
Hours after midnight are the following morning.
HourCloud coverMoon
18:00 100% Above horizon
19:00 100% Above horizon
20:00 100% Above horizon
21:00 100% Above horizon
22:00 100% Above horizon
23:00 99% Above horizon
00:00 100% Below horizon
01:00 100% Below horizon
02:00 100% Below horizon
03:00 100% Below horizon
04:00 100% Below horizon
05:00 100% Below horizon
06:00 100% Below horizon
07:00 100% Below horizon
08:00 100% Below horizon
09:00 100% Below horizon
Highest moon 9° at 20:40 Lunar day 9.1

Aurora Kp · 3-Day Forecast

NOAA SWPC · 3-hourly
Higher Kp = stronger geomagnetic activity = better aurora chances. For UK observers, Kp 4+ means aurora is possible from N. Scotland; Kp 5+ brings it across the whole UK.
Today
Sun 20 Sep
Unsettled
Peak Kp 3.0 at 03:00 UTC
Slightly unsettled — minor activity, no aurora expected.
9630
3.0 · 03:00
0003060912151821
Tomorrow
Mon 21 Sep
Quiet
Peak Kp 2.0 at 03:00 UTC
No aurora expected — geomagnetic field calm.
9630
2.0 · 03:00
0003060912151821
Tue 22
Tue 22 Sep
Quiet
Peak Kp 1.7 at 00:00 UTC
No aurora expected — geomagnetic field calm.
9630
1.7 · 00:00
0003060912151821
Aurora Forecast Map
NOAA OVATION Aurora Forecast
Global — OVATION Model
UK Focus
NOAA OVATION Model • Auto-refreshed
Your Night Sky
Meteor Showers
Coming up this year
Orionids Oct 21
Oct 2 – Nov 7
Fast, with persistent trains.
Leonids Nov 17
Nov 6 – Nov 30
Occasional storms. Fast, bright.
Geminids Dec 14
Dec 4 – Dec 20
Best of the year. Bright, multi-coloured.
Earlier this year
Quadrantids Jan 4
Jan 1 – Jan 6
Strong, short-lived peak. Bright fireballs.
Lyrids Apr 22
Apr 16 – Apr 25
Sparse, sometimes glowing trails.
Eta Aquariids May 6
Apr 19 – May 28
Best before dawn. Fast meteors.
Delta Aquariids Jul 30
Jul 12 – Aug 23
Steady rates, faint. Best late night.
Perseids Aug 12
Jul 17 – Aug 24
Bright, reliable. Best summer shower.
Light Pollution Map
Understanding the stargazing score

The stargazing score combines cloud cover and moon illumination to estimate how good conditions are for observing the night sky. Cloud cover is the dominant factor — even the darkest location is useless under heavy cloud.

The Bortle scale measures light pollution from 1 (pristine dark sky) to 9 (inner-city sky). In the UK, the best accessible sites reach Bortle 2 to 3, found in areas like Northumberland International Dark Sky Park, parts of the Lake District, Snowdonia, the Brecon Beacons, and the Scottish Highlands. At Bortle 3, the Milky Way is clearly visible and dozens of deep-sky objects are observable with binoculars.

Moon phase matters: A new moon (0% illumination) provides the darkest sky. A full moon floods the sky with light, washing out everything except planets and the brightest stars. The best stargazing combines a new or thin crescent moon with clear skies.

Practical tips: Give your eyes 20 to 30 minutes to dark-adapt after arriving at your spot. Avoid looking at phone screens (use a red-light torch instead). The hours after midnight are often best, as the atmosphere settles and any remaining cloud may clear.

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