The Tranquil Drama of a Winter Morning
The scenery around Mt. Fuji transforms into a quiet, almost mysterious scene as winter approaches. This is true on calm mornings of late November and December at Lake Saiko, where a natural phenomenon known as “steam fog” frequently occurs.
Understanding the Phenomenon
Steam fog is a natural phenomenon that occurs when very cold air moves over warmer water. The water vapor evaporating from the warmer lake cools and condenses into fog, creating a steamy layer just above the surface.
At Lake Saiko, this event can be seen on calm mornings from late November to December.
The waters of Lake Saiko still retain warmth and measured 11 degrees Celsius this morning. Since the early morning air temperature now often drops below freezing, the temperature difference between the water and the air often exceeds 10 degrees.
Through the mist covering the lake, migratory waterfowl that have flown in from Siberia for the winter appear. Beyond the lake Aokigahara Jukai forest and Mount Fuji can be seen
This is the tranquil scenery of a winter morning at Lake Saiko.
For those wishing to witness this stunning natural phenomenon firsthand, a little preparation is key.
Where to see
The northern shore offers an advantage for viewing the fog layer, as you can clearly see the Aokigahara Jukai forest and Mount Fuji beyond the lake.
The specific points marked on the map are recommended. These areas are often sheltered by the shape of the bay, which helps protect the water surface from wind. This stillness is vital, as it allows the steam fog to remain concentrated and linger longer above the lake.
What to check
The appearance of steam fog depends entirely on the temperature differential and stillness.
Time:
The best time window is typically 7:00 a.m. to 8:00 a.m. This hour is ideal because the light of the rising sun creates a stunning view of the mist, and the sun’s warmth helps alleviate the intense cold.
Temperature Difference:
Check the forecast to confirm that the early morning air temperature will drop significantly below freezing (0°C / 32°F). The temperature difference between the air and the lake water should ideally be 10 degrees or more.
Water Temperature:
The current water temperature of Lake Saiko can often be checked via the Lake Saiko Fishery Cooperative (西湖漁業協同組合) website.
Wind:
Essential for success is a calm forecast. Strong winds will quickly disperse the mist, so check the wind speed beforehand.
This is the tranquil scenery of a winter morning at Lake Saiko. Do not miss the chance to experience this drama on your next visit.
We also provide a steam fog observing tour by request. Contact us to arrange your tranquil winter morning experience.