Lake · United Kingdom
Loch Rannoch
Lake in Perth and Kinross, Scotland, UK, outflows to the River Tummel
- Area
- 18.7km²
- Max depth
- 134m
- Average depth
- 20m
- Elevation
- 205m a.s.l.
- Shoreline
- 34km
- Volume
- 0.376km³
Loch Rannoch is a lake in United Kingdom. It covers 18.7 km². On average it is 20 m deep, and 134 m at its deepest point. Its surface lies 205 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 Rannoch?
The water is warmest in August, around 15 °C at the surface, and coldest in February, around 2 °C. Even at its warmest, the surface stays below 17 °C on average: this is cold water.
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 (67 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 | 3 | 3 | 3 | 0 | 154 | 22 | 0.3 | 22 |
| February | 2 | 3 | 3 | -1 | 116 | 19 | 1.7 | 21 |
| March | 3 | 4 | 5 | 0 | 106 | 21 | 3.0 | 20 |
| April | 5 | 6 | 8 | 2 | 87 | 19 | 5.0 | 18 |
| May | 8 | 10 | 12 | 4 | 107 | 18 | 5.9 | 17 |
| June | 12 | 13 | 14 | 8 | 120 | 20 | 4.6 | 16 |
| July | 15 | 15 | 16 | 9 | 133 | 23 | 4.4 | 15 |
| August | 15 | 15 | 15 | 9 | 151 | 23 | 3.8 | 16 |
| September | 12 | 14 | 13 | 7 | 118 | 20 | 3.1 | 18 |
| October | 9 | 10 | 9 | 5 | 155 | 22 | 1.9 | 19 |
| November | 6 | 7 | 6 | 2 | 146 | 22 | 0.8 | 20 |
| December | 4 | 4 | 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 658 km² of land.
- About 27 m³ of water flow out every second, on average.
Around the shore
What's around Loch Rannoch
Counted within 1.5 km of the shoreline in OpenStreetMap, the map anyone can edit.
- 8beaches and swimming spots
Plage and 7 more
- 2campsites
Kilvrecht Caravan & Camping, Tighnavon Glamping Pods
- —boat hire and water-sport clubs
- 2marinas and slipways
Leisure
- —ferry piers
- 3viewpoints
Craig Varr
- 5hotels, B&Bs and chalets
Loch Rannoch Hotel, Bridge of Gaur, Bunrannoch House, Dunalastair Hotel, West Carie Cottage
- —fishing spots
- 2restaurants and cafés
Nearest airport with scheduled flights: Dundee Airport (DND), 82 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.
Photos
Seen by visitors
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 Kingdom21.9 km² · 13 km away13°maxLoch TayUnited Kingdom24.1 km² · 20 km away16°maxLoch TummelUnited Kingdom5.4 km² · 20 km away17°maxLoch LomondUnited Kingdom68.5 km² · 72 km away18°maxLoch NessUnited Kingdom51.6 km² · 71 km away16°maxLoch LochyUnited Kingdom16.2 km² · 49 km away16°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 (Q943839) · 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.
