独立峰は穏やかな晴れ、視界良好

Fuji Summit Report: May 31, 2026, 7:00 AM. Current conditions at the summit (3766.43m) are mostly clear with a temperature of -0.4°C, feeling like -3.6°C. Winds are light at 0.4 m/s, but gusts can reach 6.4 m/s. Visibility is excellent, exceeding 20km. No snow cover is reported. The temperature difference between the summit and base is a significant 15.9°C, necessitating preparation for drastic environmental changes.

The forecast for today shows partly cloudy to cloudy skies, but no precipitation is expected. Temperatures will gradually rise, reaching 2.6°C by noon. Winds will remain relatively calm throughout the day, with gusts up to 7 m/s. With 0cm of snow, the ground is primarily dry, exposed volcanic scree. On major routes like Fuji-no-miya or Yoshida-guchi, above the tree line, the terrain consists of exposed volcanic scree. As temperatures rise during the day, the ground may loosen, increasing the risk of rockfall from loose stones. Descending climbers should be particularly cautious.

For layering, a moisture-wicking base layer, a mid-layer such as fleece or light down, and a windproof and waterproof outer shell are essential due to the near-freezing temperatures and potential for gusts. Layering is key for adjusting to changes in body temperature during activity. While today's winds are relatively mild for an isolated peak, reaching maximum gusts of 7 m/s, they can significantly lower the perceived temperature at 3776m. The risk of hypothermia can be mitigated with proper cold-weather gear. No crampons or microspikes are needed given the lack of snow, but rain gear, water, food, a headlamp, and a first-aid kit are mandatory.

From evening onwards, clear skies are expected, but temperatures will drop back below freezing. Nighttime temperatures will reach -3°C, increasing the risk of hypothermia if not adequately prepared. The risk of altitude sickness is ever-present; ascend slowly and monitor your physical condition carefully.