望岳台コース快適。夕方冷え込み注意。

Tokachidake presents a generally calm and pleasant day for climbing. Summit temperatures will feel around 17°C in the morning, rising to about 18°C by midday. Winds will remain light throughout the day, averaging 1.5 m/s, ensuring dry and stable trail conditions on popular routes like the Bogakudai Course and Shintoku Course. Exposed rocky sections are also stable.

For layering, a moisture-wicking base, a light fleece or softshell as a mid-layer, and a windproof outer shell will suffice for daytime activity. Visibility is excellent, exceeding 20km, offering superb views of the Tokachi Mountain Range. However, as an active volcano, caution is advised in areas with higher volcanic gas concentrations, such as around the Taisho Crater, especially with subtle wind shifts.

The automated risk assessment highlights a significant temperature drop of approximately 6°C at the summit over the forecast period. Temperatures will fall to the low 14s in the evening and further to around 10°C overnight. Carry an extra insulating layer and be prepared to make an early decision to turn back if conditions change or you anticipate being out late. Carry rain gear as light drizzle is forecast for early tomorrow morning.

While the risk of thunderstorms is low, the risk of hypothermia increases significantly if you are active after sunset. A headlamp and adequate cold weather gear are essential.