Reservoir · United Kingdom
Loch Katrine
Freshwater lake and reservoir in Stirling, Scotland, UK, outflows to Achray Water and to Glengyle Water
- Area
- 12.6km²
- Max depth
- 151m
- Average depth
- 5.1m
- Elevation
- 118m a.s.l.
- Shoreline
- 33km
- Volume
- 0.065km³
Loch Katrine is a reservoir in United Kingdom. It covers 12.6 km². On average it is 5.1 m deep, and 151 m at its deepest point. Its surface lies 118 m above sea level.
Plan your visit
Stay, sail and get there
Some links above are affiliate links: if you book through them we may earn a commission, at no extra cost to you. It never changes what the data on this page says.
The water
How warm is Loch Katrine?
The water is warmest in July, around 17 °C at the surface, and coldest in February, around 4 °C. It rarely averages 20 °C, but it stays above 17 °C in July: brisk, refreshing swimming.
It does not normally freeze in winter.
On the shore, afternoons reach 16 °C on average in July and 3 °C in January. The driest month is April (87 mm of rain), the wettest October (155 mm).
Average surface temperature measured by the Landsat 8 satellite between 2013 and 2021 at the point furthest from the shore (46 readings). Shallow bays and beaches are often warmer.
From above
The whole lake from space
Month by month
The year at the lake, month by month
Not a forecast: these are averages over many years. Water is the 2013–2021 average; air, rain, sun and wind are the 1991–2020 average.
Water: 2013–2021 averageClimate: 1991–2020 average
| Month | Water°C | Water high°C | Air high°C | Air low°C | Rainmm | Rainy daysdays | Sunh/day | Windkm/h |
|---|---|---|---|---|---|---|---|---|
| January | 5 | 5 | 3 | 0 | 154 | 22 | 0.3 | 22 |
| February | 4 | 4 | 3 | -1 | 116 | 19 | 1.7 | 21 |
| March | 5 | 6 | 5 | 0 | 106 | 21 | 3.0 | 20 |
| April | 7 | 9 | 8 | 2 | 87 | 19 | 5.0 | 18 |
| May | 11 | 13 | 12 | 4 | 107 | 18 | 5.9 | 17 |
| June | 15 | 16 | 14 | 8 | 120 | 20 | 4.6 | 16 |
| July | 17 | 18 | 16 | 9 | 133 | 23 | 4.4 | 15 |
| August | 17 | 17 | 15 | 9 | 151 | 23 | 3.8 | 16 |
| September | 14 | 16 | 13 | 7 | 118 | 20 | 3.1 | 18 |
| October | 11 | 13 | 9 | 5 | 155 | 22 | 1.9 | 19 |
| November | 8 | 9 | 6 | 2 | 146 | 22 | 0.8 | 20 |
| December | 6 | 7 | 4 | 0 | 144 | 21 | 0.3 | 20 |
Water: LakeTEMP (Landsat 8, 2013–2021). Air, rain, sun and wind: NASA POWER, 1991–2020 averages. A rainy day has at least 1 mm of rain. Sunshine hours are derived from measured solar radiation.
Size & depth
How big, how deep
- On average, water stays in the lake for about 5 months before flowing out.
- Its catchment drains 96 km² of land.
- About 5.2 m³ of water flow out every second, on average.
- Its shoreline is 2.6 times longer than a circle of the same area: plenty of bays and inlets.
Around the shore
What's around Loch Katrine
Counted within 1.5 km of the shoreline in OpenStreetMap, the map anyone can edit.
- —beaches and swimming spots
- 1campsites
Loch Katrine Eco Camp
- —boat hire and water-sport clubs
- 2marinas and slipways
- 2ferry piers
- 7viewpoints
Brenachoile Point and 6 more
- 1hotels, B&Bs and chalets
Loch Achray Hotel
- —fishing spots
- 1restaurants and cafés
Nearest airport with scheduled flights: Glasgow Airport (GLA), 43 km in a straight line.
Car hire at GLA airport (Glasgow)Discover Cars · Affiliate linkOpenStreetMap is built by volunteers: when a number is low, it may just mean nobody has mapped it yet.
Recent years
How each month compared
Afternoon high on the shore. The first row is the reference, the 1991–2020 average in °C; the years below show the difference from it: warmer in orange, cooler in blue.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1991–2020 average | 3.0 | 3.2 | 5.0 | 8.3 | 11.6 | 14.3 | 15.8 | 15.2 | 12.9 | 9.3 | 5.9 | 3.7 |
| 2020 | +2.0 | +0.3 | ±0.0 | +0.9 | +0.9 | +1.3 | −1.8 | +1.0 | ±0.0 | −0.5 | +1.4 | −0.1 |
| 2021 | −2.2 | −1.0 | +1.4 | −1.1 | −1.6 | +1.5 | +3.1 | +1.8 | +2.3 | +1.0 | +1.0 | −0.3 |
| 2022 | +1.9 | +1.2 | +2.3 | +0.9 | +0.3 | +0.5 | +1.0 | +1.5 | +1.0 | +1.4 | +1.9 | −1.4 |
| 2023 | +0.6 | +2.7 | −0.2 | +0.4 | +1.8 | +3.8 | −0.2 | +0.6 | +2.0 | +0.1 | −0.7 | +0.2 |
| 2024 | ±0.0 | +1.6 | +1.0 | +0.1 | +3.6 | −0.7 | −0.3 | −0.4 | +0.3 | +0.8 | +0.4 | +2.0 |
| 2025 | −0.2 | +0.7 | +2.7 | +2.7 | +3.0 | +0.8 | +1.8 | +2.0 | −0.1 | +0.6 | +0.1 | +1.5 |
+1 warmer than usual −1 cooler than usual
Nearby
More lakes nearby
United Kingdom68.5 km² · 23 km away18°maxLoch TayUnited Kingdom24.1 km² · 39 km away16°maxLoch AweUnited Kingdom36.5 km² · 46 km away17°maxLoch RannochUnited Kingdom18.7 km² · 50 km away15°maxLoch ErichtUnited Kingdom21.9 km² · 57 km away13°maxLoch LevenUnited Kingdom13.3 km² · 69 km away18°maxAbout these numbers
| Outline, area, depth, volume | HydroLAKES v1.0 (Messager et al. 2016) · CC BY 4.0 |
|---|---|
| Water temperature and ice | LakeTEMP v1 (Korver et al. 2024), Landsat 8 2013–2021 · CC BY 4.0 |
| Air, rain, sun, wind | NASA POWER, 1991–2020 · public domain |
| Names and description | Wikidata (Q1867269) · CC0 |
| Around the shore | © OpenStreetMap contributors · ODbL |
| Images | EOX Sentinel-2 cloudless 2016 · CC BY 4.0; Wikimedia Commons |
Every figure is an average or a count from a public dataset. Licences and methods: data sources.
