山岳レポート – 日本山岳気象レポート

Latest Report — 2026-07-28 07:07 JST

御嶽山：御嶽山雨と霧に包まれ視界不良。慎重な行動を

御嶽山は終日雨と霧に包まれる見込み。午前七時半現在、山頂は弱い霧雨、気温八度二分、視程一キロ未満。山麓との気温差は約十度。日中の山頂付近の体感気温は三度から五度台で推移する。防水透湿性のレインウェア上下は必須。速乾性ベースレイヤーの上にフリースなどのミッドレイヤー、さらに防水シェルを重ねる防寒レイヤリングが必要となる。濡れた森林限界以上の白い火山礫斜面は滑りやすく、特に剣ヶ峰方面への登りでは慎重な足運びを要する。突風は時に十七メートル毎秒を超える予報。雨と風による体感温度の低下は著しく、低体温症のリスクが高い。火口湖群周辺など開けた場所では特に注意が必要。活火山である御嶽山では、ヘルメット携行を推奨する。二〇一四年噴火災害の教訓を忘れず、悪天候時の迅速な引き返し判断が命を守る。夜間も弱い雨が続き気温はさらに低下する。二十九日未明には曇り、早朝に天候回復の兆しが見られるが、夜間の行動は避けるべきである。

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80 件

2026 / July

24 reports

Mt. Ontake — 御嶽山

御嶽山雨と霧に包まれ視界不良。慎重な行動を

Rainy and Misty Conditions Persist. Limited Visibility on Open Slopes.

Mt. Ontake — 御嶽山

日中は穏やか。剣ヶ峰付近は涼風に注意を

Clear Morning on Ontake. Expect Cool Winds Near Kengamine, Light Drizzle by

Mt. Ontake — 御嶽山

独立峰剣ヶ峰へ。突風に注意し夏山を堪能せよ

Clear Conditions on Mount Ontake. Watch for Gusts, Mild Temperatures.

Mt. Ontake — 御嶽山

日中は穏やかだが稜線は強風。レイヤリングで体温維持を

Clear Skies Prevail But Gusty Winds on Exposed Ridges. Prepare for Variable

Mt. Ontake — 御嶽山

御嶽山夏空の下剣ヶ峰へ視界良好

Clear Skies and Mild Winds on Ontake. Ideal for Summit Ascents.

Mt. Ontake — 御嶽山

御嶽山剣ヶ峰は穏やか。夕方霧雨に備えよ

Mild Conditions on Mount Ontake. Prepare for Light Drizzle by Late Afternoon.

Mt. Ontake — 御嶽山

御嶽山穏やかな火山礫の道午後霧雨の予報

Calm morning on Ontake. Expect light drizzle on volcanic terrain by afternoon.

Mt. Ontake — 御嶽山

御嶽山、午前は快晴。午後は霧雨とガスに注意

Clear Morning on Ontake, Expect Light Drizzle and Reduced Visibility in

Mt. Ontake — 御嶽山

山頂視界不良のち霧雨。濡れと冷えに注意

Limited Visibility at Summit. Expect Afternoon Drizzle and Cold, Wet Conditions.

Mt. Ontake — 御嶽山

午後から霧雨と体感低下。早い行動開始を

Afternoon Drizzle and Cooling Temperatures. Secure Waterproof Gear and Plan

Mt. Ontake — 御嶽山

御嶽山穏やかな夏空。剣ヶ峰へ好条件

Stable conditions on Ontake. Good visibility and light winds for summit ascent.

Mt. Ontake — 御嶽山

御嶽山剣ヶ峰へ視界良好風穏やか

Clear Morning on Mount Ontake. Excellent Visibility for Summit Ascent.

Mt. Ontake — 御嶽山

御嶽山剣ヶ峰涼風吹き抜け。火山礫は乾

Cool Winds on Exposed Ridges. Dry Volcanic Terrain. Enjoy Clear Views Today.

Mt. Ontake — 御嶽山

白い火山礫斜面は濡れ滑りやすい剣ヶ峰は強風に注意

Wet Volcanic Slopes and Gusty Winds. Exercise Caution on Exposed Ridges.

Mt. Ontake — 御嶽山

御嶽山剣ヶ峰へ視界良好薄曇り穏やかな一日

Calm Conditions on Ontake. Expect Cool Alpine Air and Dry Volcanic Trails.

Mt. Ontake — 御嶽山

剣ヶ峰は快晴微風視界良好の登山日和

Clear Skies and Calm Winds on Mount Ontake. Excellent Visibility for Summit

Mt. Ontake — 御嶽山

御嶽山独立峰の稜線微風で視界良好

Clear Skies and Light Breeze. Ideal for Summit Ascent on Mount Ontake.

Mt. Ontake — 御嶽山

穏やかな山頂だが防寒は必須。剣ヶ峰は風に注意

Mild Weather for Summit Ascent. Expect Cool Temperatures at Exposed Ridgelines.

Mt. Ontake — 御嶽山

御嶽山穏やかな薄曇り視界は限定的

Mild and Calm Day on Ontake. Expect Limited Visibility Near Summit.

Mt. Ontake — 御嶽山

霧雨と低温続く。濡れた火山礫に注意

Persistent Drizzle and Low Temperatures. Expect Wet and Muddy Conditions on

Mt. Ontake — 御嶽山

御嶽山雲に覆われ視界不良。濡れた火山礫に足元注意

Limited Visibility on Mt. Ontake. Prepare for Cool and Potentially Wet

Mt. Ontake — 御嶽山

御嶽山火山礫斜面へ視界回復し穏やか

Improving visibility on summit. Mild winds, prepare for cool volcanic terrain.

Mt. Ontake — 御嶽山

雨に濡れる火山礫斜面。低体温症と足元に注意

Wet conditions persist on Ontake. Expect reduced visibility, gusty winds, and

Mt. Ontake — 御嶽山

御嶽山日中は穏やかな曇り。午後から雨具必須

Mild Cloudy Conditions on Mt. Ontake. Early Descent Recommended Before Evening

2026 / June

29 reports

Mt. Ontake — 御嶽山

剣ヶ峰は視界不良も日中回復。火山礫斜面は滑りやすい

Poor Visibility on Upper Slopes This Morning. Expect Clearing by Midday.

Mt. Ontake — 御嶽山

火山礫の道ドライ。剣ヶ峰へ好条件

Mild Conditions on Mount Ontake. Dry Volcanic Gravel Paths to Summit.

Mt. Ontake — 御嶽山

霧雨が晴れへ転じ視界回復。火山礫斜面は滑りやすい

Morning Mist Clearing for Clear Views. Expect Wet Volcanic Slopes and Cool

Mt. Ontake — 御嶽山

御嶽山森林限界超は低温。午後霧雨に注意

Cloudy and Chilly on Ontake Summit. Potential for Light Drizzle Afternoon.

Mt. Ontake — 御嶽山

稜線に暴風雨。火山礫斜面は滑りやすく視界も悪い

Heavy Rain and Extreme Gusts. Poor Visibility on Exposed Ridges. Hypothermia

Mt. Ontake — 御嶽山

雨とガスで濡れる火山礫斜面。早めの行動を

Wet and Slippery Volcanic Slopes. Plan Early Descent Before Afternoon Rains.

Mt. Ontake — 御嶽山

御嶽山火山礫斜面は視界不良と冷たい風

Cool, Cloudy Summit with Gusts. Limited Visibility Expected on Volcanic Slopes.

Mt. Ontake — 御嶽山

日中は穏やかな曇り。正午以降は風に注意

Cloudy with mild winds for morning ascent. Expect light gusts on exposed

Mt. Ontake — 御嶽山

御嶽稜線冷たい風。火山礫と雲に包まれる

Gusty Winds and Chilly Conditions on Ontake Summit. Prepare for Exposed

Mt. Ontake — 御嶽山

白い火山礫斜面は視界不良と強風

Limited visibility and cool damp conditions. Strong gusts persist on exposed

Mt. Ontake — 御嶽山

雨とガス、剣ヶ峰は低温で濡れ滑りやすい

Mount Ontake: Cold Rain, Dense Fog, Wet Volcanic Terrain. Hypothermia Risk

Mt. Ontake — 御嶽山

穏やかな薄曇りの一日。午後の突風に注意

Mild Conditions on Ontake. Enjoy Clear Views, Mind Midday Gusts.

Mt. Ontake — 御嶽山

午後から雨具必携。剣ヶ峰周辺は滑りやすい

Early Morning Clear, Afternoon Rain Expected. Volcanic Slopes Become Slippery.

Mt. Ontake — 御嶽山

火山礫斜面はドライ。穏やかな登高日和

Stable Weather for Ascent. Enjoy Clear Views but Heed Volcanic Zone Precautions.

Mt. Ontake — 御嶽山

薄曇り穏やかな御嶽山森林限界上は冷え込む

Mild Cloudy Morning on Mount Ontake. Prepare for Altitude Temperature Drop,

Mt. Ontake — 御嶽山

剣ヶ峰は冷涼な一日。火山礫の凍結と泥濘に注意

Cool and Clear Morning on Mt. Ontake. Expect Icy Patches on Volcanic Gravel

Mt. Ontake — 御嶽山

日中は穏やか。剣ヶ峰周辺の稜線は風に注意

Mild conditions prevail through midday. Expect light winds on exposed ridges

Mt. Ontake — 御嶽山

剣ヶ峰はドライ。突風に注意し行動を

Clear Skies Over Ontake. Dry Volcanic Terrain. Helmet Recommended for Summit

Mt. Ontake — 御嶽山

霧雨から晴天へ移行。高標高では防寒対策を徹底

Morning Mist Clearing to Clear Skies. Cold Temperatures Persist at Summit.

Mt. Ontake — 御嶽山

日中は穏やか午後風強まり夕方から雨

Clear Skies and Mild Winds for Morning Ascent. Prepare for Afternoon Gusts and

Mt. Ontake — 御嶽山

剣ヶ峰は快晴ドライ。稜線は北西風に注意

Clear Skies and Dry Volcanic Terrain. Expect Moderate Winds on Exposed Ridges.

Mt. Ontake — 御嶽山

御嶽山稜線は突風に注意午後は霧雨

Summit wind gusts increasing towards noon. Expect cool, damp conditions by late

Mt. Ontake — 御嶽山

御嶽山視界不良と冷雨。濡れと低体温に警戒せよ

Poor Visibility and Cold Rain on Mt. Ontake. Prepare for Wet Conditions and

Mt. Ontake — 御嶽山

稜線は穏やか。火山礫は乾燥し歩きやすい

Dry Volcanic Slopes on Mt. Ontake. Carry Shells for Cool Summit Conditions.

Mt. Ontake — 御嶽山

剣ヶ峰方面は視界不良。低温に備えよ

Poor Visibility at Summit. Expect Low Temperatures. Essential Layering for High

Mt. Ontake — 御嶽山

薄曇から霧雨へ。濡れた火山礫斜面に注意

Cloudy with Light Drizzle Expected. Prepare for Wet Volcanic Terrain and Rapid

Mt. Ontake — 御嶽山

稜線は突風と雨。火山礫斜面は滑落転倒に厳重警戒

Heavy Rain and Extreme Gusts on Exposed Ridges. Conditions Improve Midday.

Mt. Ontake — 御嶽山

火山礫は濡れ滑りやすい。低体温症に警戒

Wet Volcanic Terrain on Ontake. Low Visibility and Chilly Conditions Expected.

Mt. Ontake — 御嶽山

御嶽山火山礫斜面ドライ。午後は南風強まる

Clear Skies on Ontake. Expect Stronger Southerly Winds on Exposed Ridges by

2026 / May

27 reports

Mt. Ontake — 御嶽山

御嶽山火山礫斜面は穏やか。視界良好

Calm Ascent Conditions on Ontake. Expect Clear Skies and Mild Temperatures.

Mt. Ontake — 御嶽山

剣ヶ峰展望良好。森林限界以上は突風に警戒

Clear Views on Ontake Summit. Brace for Gusty Winds on Exposed Volcanic Ridges.

Mt. Ontake — 御嶽山

稜線は荒れる一日。白い火山礫斜面では突風に警戒

Summit Ridge Gusts Dangerous. Prepare for Extreme Cold on Exposed Volcanic

Mt. Ontake — 御嶽山

山頂日中穏やか。夜間は霧雨に注意

Mild Day for Ascent. Prepare for Light Drizzle Overnight.

Mt. Ontake — 御嶽山

稜線は風冷え。剣ヶ峰付近はしっかり防寒対策を

Moderate Alpine Conditions on Ontake. Expect Cool Winds Near Summit. Layer Up

Mt. Ontake — 御嶽山

剣ヶ峰目指す穏やかな一日。視界良好

Gentle Spring Ascent on Ontake. Enjoy Clear Views Above the Forest Line.

Mt. Ontake — 御嶽山

御嶽山剣ヶ峰へ快晴の道。火山礫ドライ

Mt. Ontake: Clear Skies and Mild Winds. Dry Volcanic Terrain Perfect for Ascent.

Mt. Ontake — 御嶽山

剣ヶ峰周辺は穏やかな一日。火山礫の道は乾燥

Ontake Trails Dry and Mild. Enjoy Clear Views Towards Summit.

Mt. Ontake — 御嶽山

火山礫斜面は冷たい風。防寒対策を徹底せよ

Chilly and Cloudy Day on Mt. Ontake. Gusty Winds on Exposed Ridges.

Mt. Ontake — 御嶽山

白い火山礫斜面はドライ。午後は霧雨と冷え込みに注意

Clear Morning on On-take. Prepare for Afternoon Mist and Cooling Temperatures.

Mt. Ontake — 御嶽山

御嶽山雨と突風。火山礫斜面は滑りやすく視界不良

Heavy Rain and Gusts on Ontake. Slippery Volcanic Scree and Poor Visibility.

Mt. Ontake — 御嶽山

御嶽山日中穏やか夜半から雨

Ontake: Clear and calm morning. Increasing winds and rain expected by evening.

Mt. Ontake — 御嶽山

白い火山礫の道午後風増す剣ヶ峰

Optimal morning ascent conditions. Prepare for afternoon winds and significant

Mt. Ontake — 御嶽山

快晴の登山日和。剣ヶ峰は風に注意し防寒対策を

Clear Skies for Mt. Ontake. Mild Winds, but Prepare for Evening Chill on

Mt. Ontake — 御嶽山

御嶽山穏やかな快晴の登山日和

Clear Skies, Gentle Breezes. Enjoy Dry Conditions on Volcanic Slopes.

Mt. Ontake — 御嶽山

快晴の山頂へ軽快な登高午後風に注意

Clear Skies and Calm Winds for Ascent. Watch for Afternoon Wind Shift.

Mt. Ontake — 御嶽山

御嶽山快晴微風、稜線歩きは快適

Calm and clear conditions on Mt. Ontake. Prepare for evening temperature drop.

Mt. Ontake — 御嶽山

御嶽火山礫の道はドライ。穏やかな登高

Clear Skies and Light Breeze on Mt. Ontake. Mild Daytime, Freezing Nights.

Mt. Ontake — 御嶽山

視界不良に注意。午後は弱い霧雨

Limited Visibility at Summit. Light Drizzle Expected Midday. Dress Warmly.

Mt. Ontake — 御嶽山

穏やかな朝から午後霧雨。火山礫斜面は滑りやすく

Mild morning turns to light drizzle in afternoon. Expect wet volcanic scree on

Mt. Ontake — 御嶽山

御嶽山青空と微風の岩稜歩き

Clear Skies and Mild Winds on Ontake. Expect Dry Trails, Excellent Visibility.

Mt. Ontake — 御嶽山

日中は穏やか。午後から稜線に風が吹き体感は氷点下

Clear Skies and Cold Mornings. Prepare for Variable Winds on Exposed Ridges.

Mt. Ontake — 御嶽山

稜線は猛烈な突風凍結。行動は慎重に

Extreme Gusts on Summit. Icy Volcanic Terrain. Limit Exposed Ridge Travel.

Mt. Ontake — 御嶽山

日中雨と霧が稜線覆う。気温急降下

Rain and Mist Ascending. Prepare for Rapid Temperature Plunge and Strong Gusts.

Mt. Ontake — 御嶽山

剣ヶ峰は穏やか。日差し強く風が強まる

Clear Skies on Ontake. Moderate Winds Expected on Exposed Ridges by Midday.

Mt. Ontake — 御嶽山

剣ヶ峰周辺は凍結の恐れ。強風に警戒せよ

Cold Summit Conditions with Gusty Winds. Prepare for Freezing Temps and Exposed

Mt. Ontake — 御嶽山

剣ヶ峰は快晴。視界良好も肌寒い

Clear Skies and Excellent Visibility. Summit Temperatures Remain Cold.