3D view drawn from Copernicus WorldDEM-30 (© DLR e.V., © Airbus Defence and Space GmbH, Copernicus/ESA) and Sentinel-2 cloudless 2016 by EOX IT Services GmbH, CC BY 4.0
Mountain in Seychelles
Colvocoresses Reef is a mountain in Seychelles. Its summit stands -9 m above sea level.
Scores
Two scores out of 10, built only from open data — every part is shown. They describe what the mountain offers, not how safe it is.
Hiking & mountaineering
1.5/10
Ski score
—
No ski runs within 12 km in OpenStreetMap.
Ski (where OpenStreetMap has skiing within 12 km): up to 4 points for the length of downhill runs (300 km or more = 4), 1.5 for the number of lifts (40+), 1.5 for the vertical between lift stations (1,500 m) and 3 for the snow season — a month counts when the estimated mean temperature at the height of the ski area is −1 °C or lower and snow falls or lies there (NASA POWER, 2001–2020). Hiking & mountaineering: up to 2.5 for waymarked routes and paths, 1.5 for huts, 2 for the ascent from the valley (2,000 m), 1.5 for prominence (3,000 m), 1.5 for the season (months with summit afternoons above −5 °C) and 1 for via ferratas, climbing and glaciers. OpenStreetMap is built by volunteers: where few things are mapped, a score can be lower than reality.
Plan your visit
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.
Snow
In a normal year there is no snow on this mountain, not even at the summit.
Estimate for a normal year: average temperature and precipitation from NASA POWER, carried to each height, in a simple model of snow building up and melting. In a given year snow can come earlier or stay longer. It does not replace the local snow and avalanche bulletin.
Summit weather
Not a forecast: long-term averages (1991–2020), carried up to the summit. The orange line is where an average afternoon reaches 0 °C; above the dashed blue line it freezes even at dawn.
On an average April afternoon the summit reaches about 28 °C; on August nights it falls to about 27 °C. Afternoons at the top are above freezing in every month of the average year. In April the 0 °C line climbs to about 5,700 m, above the summit: the top thaws on an average afternoon. Across the region, May is the driest month (141 mm) and September the wettest (232 mm).
| Month | Summit high °C | Summit low °C | 0 °C line (m) | Rain & snow (mm) | Wet days | Sun h/day |
|---|---|---|---|---|---|---|
| January | 28 | 27 | 5,540 | 221 | 24 | 6.9 |
| February | 28 | 27 | 5,580 | 167 | 21 | 7.6 |
| March | 28 | 28 | 5,660 | 148 | 21 | 8.5 |
| April | 28 | 28 | 5,700 | 141 | 22 | 8.2 |
| May | 28 | 28 | 5,680 | 141 | 20 | 7.8 |
| June | 28 | 27 | 5,600 | 151 | 22 | 6.7 |
| July | 28 | 27 | 5,540 | 212 | 23 | 6.0 |
| August | 28 | 27 | 5,500 | 188 | 24 | 6.3 |
| September | 28 | 27 | 5,520 | 232 | 24 | 6.6 |
| October | 28 | 27 | 5,540 | 188 | 22 | 7.5 |
| November | 28 | 27 | 5,540 | 206 | 23 | 7.1 |
| December | 28 | 27 | 5,540 | 220 | 24 | 7.3 |
Estimate: the NASA POWER climate of a ~55 km cell (average height 0 m), adjusted to the summit by −6.5 °C per 1,000 m. Rain, wet days and sunshine are those of the region. Mountain weather changes fast — always check a local forecast. ★ = mildest months at the top.
Around the mountain
Counted around the summit in OpenStreetMap, the map anyone can edit. The satellite plate shows 14 × 14 km.
OpenStreetMap is built by volunteers: a low number may just mean nobody has mapped it yet. Places © OpenStreetMap contributors (ODbL).
Recent years
Afternoon high at the summit (estimate). The first row is the reference, the 1991–2020 average in °C; the years show only the difference.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1991–2020 average | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 |
| 2020 | +0.5 | +0.6 | +0.4 | +0.4 | +0.3 | +0.5 | +0.5 | −0.1 | −0.2 | +0.3 | +0.3 | +0.1 |
| 2021 | ±0.0 | −0.2 | +0.2 | +0.2 | +0.3 | −0.3 | −0.2 | −0.1 | −0.1 | +0.2 | ±0.0 | +0.1 |
| 2022 | +0.4 | −0.1 | −0.2 | +0.3 | +0.3 | −0.3 | −0.2 | −0.3 | −0.2 | −0.2 | ±0.0 | −0.1 |
| 2023 | −0.4 | −0.6 | −0.1 | +0.2 | ±0.0 | ±0.0 | +0.4 | +0.3 | +0.8 | +0.9 | +0.4 | +0.4 |
| 2024 | +0.7 | +0.9 | +0.9 | +0.7 | +0.4 | +0.8 | +0.9 | +0.6 | +0.6 | +0.4 | +0.7 | +0.2 |
| 2025 | ±0.0 | +0.2 | +0.5 | +0.4 | +0.6 | +0.4 | +0.5 | +0.3 | +0.2 | ±0.0 | ±0.0 | +0.1 |
+1 warmer than usual −1 cooler than usual
Nearby
| Names, elevation, prominence | Wikidata (Q3454563) · CC0 |
|---|---|
| Relief, 3D view, profiles | Copernicus DEM GLO-30 · © DLR e.V., © Airbus Defence and Space GmbH, Copernicus/ESA |
| Climate | NASA POWER, 1991–2020 · CC BY 4.0 |
| Around the mountain | © OpenStreetMap contributors · ODbL |
| Images | EOX Sentinel-2 cloudless 2016 · CC BY 4.0; Wikimedia Commons |
Every figure is an average, an estimate or a count from a public dataset. Licences and methods: data sources.
The family
Same idea, other landscapes: field atlases built on open data, month by month, in seven languages.
beaches
Find your beach: sea temperature, sun and swimming month by month.Visit 
lakes
Every lake on Earth: water temperature, ice, depth and the shore.Coming soonVisit 
mountains
Every summit in 3D: summit weather, the 0 °C line, huts and trails.You are here
waterfalls
Every waterfall: height, flow month by month and when it roars.Coming soonVisit 
islands
Every island from the sea up: size, sea temperature, ferries and 3D.Coming soonVisit 
rivers
Every river from source to sea: the journey, the flow and the basin in numbers.Visit 