現在の白馬岳山頂は弱い霧雨に包まれ、視程は5.9km。気温9.8℃、体感8.2℃と肌寒い状況だ。湿度99%で全体的に湿っている。
日中は9時頃から霧が晴れ、ほぼ晴れの天候に好転する見込み。12時には気温13.4℃まで上昇し、穏やかな登山日和となるだろう。しかし、夏期も軽アイゼンが必要な大雪渓では、霧雨により表面が湿り、スリップに注意が必要だ。雪渓上の踏み抜きにも警戒し、視程回復後も落石リスクは常にあるため、通過は迅速に行うこと。
地面は霧雨で湿潤状態だが、日中の晴天と気温上昇で岩稜帯は乾きやすくなる。泥濘は限定的だろう。現在の体感8.2℃では、ベースレイヤー、ミッドレイヤー(フリース)、防水透湿性のアウターシェルは必須だ。日中気温が上がっても、稜線での休憩時や風対策としてアウターは携行すること。手袋や帽子も有効となる。
風は日中を通して穏やかで、最大突風も10m/s前後と行動に支障はない。雷のリスクも低い。低体温症のリスクは低いが、濡れた状態での長時間行動や休憩は避け、雨具の適切な着用でリスクを軽減できる。山麓との気温差は10℃以上あり、山頂付近の冷え込みは厳しい。適切な装備と状況判断があれば、白馬岳への登山は可能だが、稜線のお花畑散策時など、油断なく気象の変化に注意を払うこと。
富山県・長野県
白馬岳
Mt. Shirouma
2026年7月16日 07:00 更新
霧雨明けの稜線穏やか 視界回復へ
Morning mist clearing for pleasant ridge walking. Expect stable conditions on
現在の気象状況 — Current Conditions
▲ 山頂エリア (Summit)
気温 Temp
+9.8°C
風速 Wind
2.9m/s
W
天候 Weather
🌦️ 弱い霧雨
体感 Feels Like
+8.2°C
▼ 登山口・山麓エリア (Base)
気温 Temp
+20.2°C
風速 Wind
1.1m/s
W
天候 Weather
🌦️ 弱い霧雨
標高 Altitude
1,237m
山頂の3時間予報 — Summit Forecast
09:00
+11°C
2.6m/s
WSW
💧 0mm
(59%)
12:00
+13°C
2.5m/s
WNW
💧 0mm
(14%)
15:00
+12°C
1.8m/s
WNW
💧 0mm
(78%)
18:00
+11°C
1.5m/s
W
💧 0mm
(86%)
21:00
+10°C
1.3m/s
E
💧 0mm
(27%)
00:00
+9°C
1.7m/s
ENE
💧 0mm
(0%)
03:00
+9°C
1.8m/s
E
💧 0mm
(0%)
気象分析 — Analysis Report
日本語
コンディション概ね良好 — 通常の山岳安全対策を実施すること
English
Conditions generally good — Conduct standard mountain safety measures
Currently, the summit of Mt. Shirouma is enveloped in light drizzle, with visibility at 5.9km. The temperature is 9.8°C, feeling like 8.2°C, making it quite chilly. Humidity stands at 99%, indicating a generally damp environment.
Conditions are expected to improve from around 9 AM, with the mist clearing to mostly sunny skies. By noon, the temperature will rise to 13.4°C, promising a pleasant day for climbing. However, caution is advised on the Daisekkei (Great Snow Valley), where light crampons are necessary even in summer. The drizzle makes the surface wet, increasing the risk of slipping. Be vigilant for post-holing on the snowfield, and even after visibility improves, the risk of rockfall is ever-present, so traverse swiftly.
The ground is damp from the drizzle, but the sunny weather and rising temperatures during the day will help dry out rocky sections. Muddy conditions should be localized. For the current felt temperature of 8.2°C, a base layer, mid-layer (fleece), and waterproof/breathable outer shell are essential. Even as temperatures rise, carry your outer shell for breaks on the ridge and wind protection. Gloves and a hat are also beneficial.
Winds will remain gentle throughout the day, with gusts around 10m/s, posing no significant hindrance to movement. The risk of lightning is low. While the risk of hypothermia is also low, avoid prolonged exposure to wet conditions or extended breaks. Proper use of rain gear will mitigate this risk. The temperature difference from the base is over 10°C, indicating a significant chill at the summit. With appropriate gear and sound judgment, an ascent of Mt. Shirouma is feasible, but remain vigilant for weather changes, especially when exploring the ridge's alpine flower fields.
Conditions are expected to improve from around 9 AM, with the mist clearing to mostly sunny skies. By noon, the temperature will rise to 13.4°C, promising a pleasant day for climbing. However, caution is advised on the Daisekkei (Great Snow Valley), where light crampons are necessary even in summer. The drizzle makes the surface wet, increasing the risk of slipping. Be vigilant for post-holing on the snowfield, and even after visibility improves, the risk of rockfall is ever-present, so traverse swiftly.
The ground is damp from the drizzle, but the sunny weather and rising temperatures during the day will help dry out rocky sections. Muddy conditions should be localized. For the current felt temperature of 8.2°C, a base layer, mid-layer (fleece), and waterproof/breathable outer shell are essential. Even as temperatures rise, carry your outer shell for breaks on the ridge and wind protection. Gloves and a hat are also beneficial.
Winds will remain gentle throughout the day, with gusts around 10m/s, posing no significant hindrance to movement. The risk of lightning is low. While the risk of hypothermia is also low, avoid prolonged exposure to wet conditions or extended breaks. Proper use of rain gear will mitigate this risk. The temperature difference from the base is over 10°C, indicating a significant chill at the summit. With appropriate gear and sound judgment, an ascent of Mt. Shirouma is feasible, but remain vigilant for weather changes, especially when exploring the ridge's alpine flower fields.
山岳ガイド — Mountain Guide
概要 Overview
北アルプス北部に位置する標高2,932mの百名山。「白馬大雪渓」をはじめとする豊富な高山植物群と、稜線からの大パノラマで多くの登山者を魅了し続ける北アルプスの名峰。
特徴・地形 Features
日本三大雪渓のひとつ大雪渓(葱平〜白馬尻)を持ち、夏でも雪上歩行を楽しめる。山頂周辺は2,800m級の主稜線が連なり、白馬大池・杓子岳・鑓ヶ岳と続く縦走ルートは絶景。
ベストシーズン Best Season
7月中旬〜9月中旬。大雪渓は8月でも雪が残るため軽アイゼン推奨。お花畑のピークは7月下旬。
主要ルート Main Routes
大雪渓ルート(猿倉起点・最人気)、栂池ルート、白馬鑓温泉経由、後立山連峰縦走。
注意点・危険箇所 Cautions
大雪渓では落石・スリップ事故が多発。早朝の通過と軽アイゼン着用を推奨。雷雨・濃霧時の稜線行動に注意。
アクセス Access
北陸新幹線長野駅・大糸線白馬駅からバスで猿倉登山口へ。栂池高原はロープウェイ利用可能。
※ 本ガイド情報は一般的な参考資料であり、最新の登山道状況・規制情報は各自治体・登山口の公式情報をご確認ください。