River
Kymi River
204 km from source to mouth · Finland.
FinlandFlows into Gulf of Finland5th longest in Finland
In numbers
Length
204km
Average flow
300m³/s
Basin
37,200km²
Drop
61m
from 65 m to 4 m
Country
1
The journey
From source to mouth
204 km of river and 28 stops on the way: 7 towns and cities on its banks, dams, bridges and the tributaries that feed it.
- 0 kmPäijänneat 65 m
- 49 kmPäijänne1,270 km²
- 53 kmKalkkinen600 people
- 60 kmPaljärvi0.7 km²
- 77 kmHeinola17,746 people
- 94 kmRuotsalainen127 km²
- 100 kmArrajärvi12 km²
- 100 kmKylliäisjärvi0.5 km²
- 104 kmKotojärvi1.1 km²
- 108 kmHiisiöistenlammi1.8 km²
- 109 kmVähä Valkjärvi1.5 km²
- 110 kmMärkjärvi4.1 km²
- 110 kmTervaslammi0.3 km²
- 111 kmValkjärvi3.1 km²
- 111 kmIso Pikijärvi0.6 km²
- 134 kmPyhäjärvi62 km²
- 136 kmSompanen1.5 km²
- 145 kmKuusaanlampi1.7 km²
- 151 kmKoria5,100 people
- 151 kmPioneeripuisto
- 151 kmKoria Railway Bridge
- 151 kmKoria old railway bridge
- 153 kmKouvola78,824 people
- 173 kmInkeroinen5,250 people
- 174 kmAnjala16,779 people
- 179 kmHuruksela
- 180 kmMuhjärvi2.7 km²
- 201 kmKarhula22,867 people
- 202 kmKyminlinna
- 204 kmGulf of Finlandat 4 m
Water level along the river (RiverATLAS; the height is exaggerated). Towns: GeoNames and Wikidata; bridges, dams and tributaries: Wikidata.
River in Finland
At the mouth it carries 295 m³/s on average: an Olympic pool every 8.5 seconds. It drops from 65 m to 4 m, 0.3 m per kilometre on average. Its basin covers 37,200 km², about the size of GW. 449,000 people live in it. Highest water, with the snowmelt: from April to May; lowest: from December to March. No large dam holds it back: it is one of the world's free-flowing rivers.
Where to start
- KouvolaLargest city on its banks · 78,824 people
- Lappeenranta Airport (LPP)Nearest airport with scheduled flights, 80 km from the cityCar hire at LPP airport (Lappeenranta)Discover Cars · Affiliate link↗
- On the water50 ferry piers, marinas, boat rentals and boat ramps along the river (OpenStreetMap)
- Kayak and canoe52 put-ins and rapids mapped (OpenStreetMap)
- From June to AugustThe best months to visit
Kymi River, month by month
Highest water: from April to May
Lowest water: from December to March. Freezing months (average below −4 °C): from December to February. Melting snow makes up much of its water. Best months to visit: from June to August.
From about 200 m³/s in the lowest month to 250 m³/s in the highest. An estimate: the monthly flow is modelled from the lowest and highest months of WaterGAP (RiverATLAS, 1971–2000) and the rain and snow along the river (WorldClim). Dams change the real rhythm. The chip is the average air temperature; below it, the month's rain.
Plan the trip
Plan the trip: boat trips, a bed by the river, a car
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 basin
Kymi River: the basin in numbers
26,795 km² of land send their water to this river. This is what lives on it.
- 449,000people live in the basin
- 19/km²people per km²
- 118maverage altitude of the basin
- 619mmof rain a year (basin average)
- 3.0°Caverage air temperature
- 1%protected areas
- 18.0%covered by lakes
What covers the basin
- 77% Forest
- 6% Cropland
- 1% Towns and cities
RiverATLAS (HydroATLAS v1.0, CC BY 4.0): land cover, people, protected areas, glaciers and dams over the whole basin upstream of the mouth.
Along the river
Kymi River: what you find on the way
- 11WeirsMyllypuron mittauspato, Siikakoski, Koivukosken pato and 8 more
- 1Waterfalls
- 7RapidsKaurakoski, Hirvenjoki, Kultaankoski and 4 more
- 45Canoe put-insVasikkasaaren rantautumispaikka, Savion rantautumispaikka, Tapolan rantautumispaikka and 42 more
- 33Boat rampsHevossaaren veneluiska, Sinilähteen veneluiska, Keskustan veneluiska and 30 more
- 1Ferry piersKalkkinen
- 15MarinasKalkkisten Vierasvenesatama, Laivaranta, Heinolan satama and 12 more
- 22River beachesNaumin uimaranta, Hevossaaren uimaranta, Kaivannon uimaranta and 19 more
From OpenStreetMap, within 2.1 km of the river. Not mapped is not the same as not there.
Cross-checked with our atlases
Kymi River in our other atlases
What our sister atlases know about the waterfalls on this river, the lakes it flows through, the beaches at its mouth, the mountains where it rises and the islands off its mouth.
16lakes on its wayLakeyas
132beaches at the mouth and on the banksCoastya
15islands off the mouthIslandyas
Lakes and reservoirs (16)
Lakes it flows through, by Lakeyas
- Päijännekm 52 · 95 m deep1,270km²
- Ruotsalainenkm 100127km²
- Arrajärvikm 10612km²
- Märkjärvikm 1174.1km²
- Valkjärvikm 1183.1km²
- Pyhäjärvikm 14262km²
- Kuusaanlampikm 1551.7km²
- Muhjärvikm 1922.7km²
8 more on LakeyasLakeyas is coming soonOpen Lakeyas ↗
Beaches (132)
At the mouth (25 km) and on the banks, by Coastya
- Pakustranden22 km away17.3°C
- Huutjärvi simstrand9.5 km away17.3°C
- Varvet22 km away17.3°C
- Sastavi16 km away17.4°C
- Pitkäthiekat19 km away17.5°C
- Flakanäs badstrand22 km away17.3°C
- Kotoranta22 km away · cove17.3°C
- Huumanpohjakm 216 · cove17.4°C
124 more on CoastyaOpen Coastya ↗
Islands off the mouth (15)
Within 30 km of the mouth, by Islandyas
- Kaunissaari18 km away4.1km²
- Kotkansaari4.2 km away
- Kukouri7.0 km away
- Varissaari6.2 km away
- Rankki14 km away
- Kuusinen5.0 km away
- Kuutsalo9.1 km away
- Mussalo5.6 km away
7 more on IslandyasIslandyas is coming soonOpen Islandyas ↗
From space
The source and the mouth, seen from orbit
Sentinel-2 cloudless 2016 by EOX IT Services GmbH (contains modified Copernicus Sentinel data 2016), CC BY 4.0. The glowing line is the river as drawn by RiverATLAS.
Photos
Kymi River in pictures
Nearby
Rivers nearby
Estonia74 km400 m³/s130 km awayNeva
Russia74 km2,500 m³/s196 km awayPirita RiverEstonia107 km7.5 m³/s163 km awayVuoksaRussia143 km680 m³/s197 km awayKeila RiverEstonia112 km8.6 m³/s190 km awayEmajõgiEstonia100 km70 m³/s228 km awayPedja RiverEstonia125 km11 m³/s234 km awayPõltsamaa RiverEstonia136 km16 m³/s227 km awayWhere these numbers come from
| Name, length, places | Wikidata (Q890526) · CC0 |
|---|---|
| Course, profile, basin | RiverATLAS v1.0 (HydroATLAS, Linke et al. 2019) · CC BY 4.0 — followed from the source to the mouth given by Wikidata |
| Flow | WaterGAP (RiverATLAS), 1971–2000 · CC BY 4.0 |
| Climate along the river | WorldClim (RiverATLAS), 1970–2000 · CC BY 4.0 |
| Towns, bridges, dams | Wikidata · CC0; GeoNames · CC BY 4.0 |
| Along the river | © OpenStreetMap contributors · ODbL |
| Images | EOX Sentinel-2 cloudless 2016 · CC BY 4.0; Wikimedia Commons |
| Our other atlases | Lakeyas, Coastya, Islandyas — Wikidata · CC0; © OpenStreetMap contributors · ODbL; GeoNames · CC BY 4.0; HydroLAKES · CC BY 4.0; NOAA OISST |
Every source and licence is on the data sources page.
The family
Do you prefer beaches, lakes, mountains, waterfalls, islands, rivers or canyons?
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beaches
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waterfalls
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Every island from the sea up: size, sea temperature, ferries and 3D.Coming soonVisit 
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Every canyon cut to scale: depth to the floor, rim and floor temperatures, trails and viewpoints.Coming soonVisit