山頂は薄曇りで視程一キロ未満。山麓はほぼ晴れているが、標高差一千六百メートルで気温は十二度以上異なる。山頂の現況気温は三点七度、体感は零点八度。日中は七度台まで上がる予報だが、湿度九十七パーセントと高く、風が吹けば体感はさらに冷え込む。
白馬大雪渓は残雪が多く、日中の気温上昇で雪が緩む可能性がある。視界不良の中での踏み抜きやスリップに厳重な注意が必要。夏期も軽アイゼンが必要な区間であるため、必ず携行すること。稜線は岩稜露出となるが、高湿度で濡れている箇所が多く、滑りやすい。ベースレイヤーは吸湿速乾性素材、ミッドレイヤーにフリースや薄手ダウン、アウターは防水透湿性素材のシェルを必ず着用し、体温調整できるよう準備する。
雷のリスクは低い。降水確率は上がるが降水量は見込まれない。風は日中最大突風十点五メートル毎秒程度で、行動に大きな支障はないが、稜線上では体感気温を一層下げる要因となる。低体温症を防ぐため、こまめな休憩と栄養補給、濡れない工夫が重要。
夕方にかけては晴れ間が広がり視程は回復する見込み。夜間から翌早朝にかけては快晴となり、気温は三度台まで下がるが、風が弱まるため比較的穏やかになるだろう。
富山県・長野県
白馬岳
Mt. Shirouma
2026年7月3日 07:05 更新
稜線は霧に包まれ視界不良。大雪渓は慎重に
Limited Visibility on Summit. Exercise Caution on Snow Patches and Wet Rocks.
現在の気象状況 — Current Conditions
▲ 山頂エリア (Summit)
気温 Temp
+3.7°C
風速 Wind
2.5m/s
W
天候 Weather
⛅ 薄曇り
体感 Feels Like
+0.8°C
▼ 登山口・山麓エリア (Base)
気温 Temp
+16.3°C
風速 Wind
1.6m/s
WNW
天候 Weather
🌤️ ほぼ晴れ
標高 Altitude
1,237m
山頂の3時間予報 — Summit Forecast
09:00
+5°C
1.9m/s
WNW
💧 0mm
(43%)
12:00
+7°C
1.9m/s
NW
💧 0mm
(86%)
15:00
+8°C
2.5m/s
WNW
💧 0mm
(78%)
18:00
+6°C
1.8m/s
WNW
💧 0mm
(49%)
21:00
+5°C
0.4m/s
NE
💧 0mm
(2%)
00:00
+4°C
1m/s
ENE
💧 0mm
(0%)
03:00
+4°C
0.8m/s
NNW
💧 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
The summit is partly cloudy with visibility less than one kilometer. While the base is mostly sunny, there is a temperature difference of over 12 degrees Celsius across the 1600-meter elevation gain. The current summit temperature is 3.7 degrees Celsius, feeling like 0.8 degrees Celsius. Although the forecast indicates temperatures will rise to around 7 degrees Celsius during the day, the high humidity of 97 percent means that the wind will make it feel colder.
Hakuba Daisekkei, the major snow gorge, has significant remaining snow. The rising daytime temperatures could soften the snow. Extreme caution is required to avoid post-holing or slipping, especially with the limited visibility. Light crampons are essential for this section even in summer, so be sure to carry them. The ridge lines are exposed rock, but due to high humidity, many sections are wet and slippery. For layering, wear a moisture-wicking base layer, a fleece or light down mid-layer, and a waterproof-breathable shell as an outer layer, preparing to adjust as needed.
The risk of lightning is low. Although the probability of precipitation increases, no significant rainfall is expected. Wind gusts will reach up to approximately 10.5 meters per second during the day. While not severe enough to significantly impede movement, these gusts will further lower the perceived temperature on exposed ridges. To prevent hypothermia, take frequent breaks, refuel adequately, and ensure your clothing stays dry.
Visibility is expected to improve as skies clear towards the evening. Overnight and into early morning, conditions will be clear with temperatures dropping
Hakuba Daisekkei, the major snow gorge, has significant remaining snow. The rising daytime temperatures could soften the snow. Extreme caution is required to avoid post-holing or slipping, especially with the limited visibility. Light crampons are essential for this section even in summer, so be sure to carry them. The ridge lines are exposed rock, but due to high humidity, many sections are wet and slippery. For layering, wear a moisture-wicking base layer, a fleece or light down mid-layer, and a waterproof-breathable shell as an outer layer, preparing to adjust as needed.
The risk of lightning is low. Although the probability of precipitation increases, no significant rainfall is expected. Wind gusts will reach up to approximately 10.5 meters per second during the day. While not severe enough to significantly impede movement, these gusts will further lower the perceived temperature on exposed ridges. To prevent hypothermia, take frequent breaks, refuel adequately, and ensure your clothing stays dry.
Visibility is expected to improve as skies clear towards the evening. Overnight and into early morning, conditions will be clear with temperatures dropping
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。