鳥海山山頂はほぼ晴れ、気温8.3℃、体感は6.3℃。風は弱く、日本海からの濃霧や強風のリスクは低い。視程は13km以上と良好で、日本海展望が期待できる。山麓は21.3℃と気温差が大きく、行動開始時は軽装でも、山頂部では肌寒さを感じる。
今日の地面コンディションは、降水がなく乾燥傾向のため全体的にドライ。しかし、秋まで残る雪渓周辺や谷筋では融水によるウェットな箇所があるかもしれない。新山周辺の岩稜は露出しており、不安定な岩塊には注意が必要だ。
日中の行動時間帯は、山頂付近の気温が9.9℃から11.5℃で推移し、風速は2.47m/sから3.76m/s、突風は最大で11.7m/sに達する。この条件での体感気温は概ね6℃から8℃程度となる。ベースレイヤーに速乾性の化繊またはウール、ミッドレイヤーに薄手のフリース、アウターには防風性のあるソフトシェルやハードシェルが適切だ。休憩時や山頂ではさらに保温着を羽織る準備が必要となる。アイゼンやチェーンスパイクは不要だが、雨具は念のため携行すること。
雷のリスクは低く、強風も行動を中止するほどではない。しかし、鳥海山の長い稜線ルートでは風の影響を受けやすいため、突風に備え、防寒対策を怠らないこと。日没後の気温は5℃台まで下がり、突風は最大12.7m/sとなるため、夜間の行動は厳重な防寒対策が必須となる。低体温症のリスクは日中では低いが、夜間は注意が必要だ。
山形県・秋田県
鳥海山
Mt. Chokai
2026年7月6日 07:01 更新
日本海展望クリア。穏やかな登高が続く
Clear Skies and Mild Winds. Enjoy the Ascent on Established Trails with
現在の気象状況 — Current Conditions
▲ 山頂エリア (Summit)
気温 Temp
+8.3°C
風速 Wind
2.3m/s
SSE
天候 Weather
🌤️ ほぼ晴れ
体感 Feels Like
+6.3°C
▼ 登山口・山麓エリア (Base)
気温 Temp
+21.3°C
風速 Wind
1m/s
SE
天候 Weather
🌤️ ほぼ晴れ
標高 Altitude
499m
山頂の3時間予報 — Summit Forecast
09:00
+10°C
2.5m/s
SSE
💧 0mm
(6%)
12:00
+12°C
3.8m/s
SE
💧 0mm
(0%)
15:00
+10°C
3.5m/s
SSE
💧 0mm
(4%)
18:00
+8°C
3.1m/s
SSE
💧 0mm
(4%)
21:00
+7°C
3.2m/s
SSE
💧 0mm
(8%)
00:00
+6°C
3.1m/s
SSE
💧 0mm
(10%)
03:00
+5°C
2.8m/s
SSE
💧 0mm
(8%)
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
Mount Chokai summit is mostly clear with a temperature of 8.3 degrees Celsius, feeling like 6.3 degrees Celsius. Winds are light, indicating a low risk of dense fog or strong winds from the Sea of Japan. Visibility exceeds 13 kilometers, promising excellent views of the Sea of Japan. The base temperature is 21.3 degrees Celsius, creating a significant temperature difference, so while starting lightly dressed, the summit area will feel chilly.
Today's ground conditions are generally dry due to no precipitation and dry weather. However, some wet areas might be present near the remaining snowfields, which persist until autumn, and in valley areas due to meltwater. The rocky ridges around Shinsan are exposed, and caution is advised for unstable rockfall.
During the daytime activity hours, summit temperatures will range from 9.9 to 11.5 degrees Celsius, with wind speeds between 2.47 m/s and 3.76 m/s, and gusts reaching up to 11.7 m/s. The effective wind chill temperature under these conditions will be approximately 6 to 8 degrees Celsius. Appropriate layering includes a quick-drying synthetic or wool base layer, a light fleece mid-layer, and a windproof softshell or hardshell as an outer layer. Be prepared to add an additional insulating layer, such as a down or synthetic insulated jacket, during breaks or at the summit. Crampons or microspikes are not necessary, but rain gear should be carried as a precaution.
The risk of thunderstorms is low, and strong winds are not at a level to necessitate stopping activity. However, the long ridge routes of Mount Chokai are susceptible to wind effects, so be mindful of gusts and maintain adequate cold weather protection. After sunset, temperatures will drop to around 5 degrees Celsius, with gusts up to 12.7 m/s, requiring strict cold weather preparation for any nighttime activity. While the risk of hypothermia is low during the day, it becomes a concern at night.
Today's ground conditions are generally dry due to no precipitation and dry weather. However, some wet areas might be present near the remaining snowfields, which persist until autumn, and in valley areas due to meltwater. The rocky ridges around Shinsan are exposed, and caution is advised for unstable rockfall.
During the daytime activity hours, summit temperatures will range from 9.9 to 11.5 degrees Celsius, with wind speeds between 2.47 m/s and 3.76 m/s, and gusts reaching up to 11.7 m/s. The effective wind chill temperature under these conditions will be approximately 6 to 8 degrees Celsius. Appropriate layering includes a quick-drying synthetic or wool base layer, a light fleece mid-layer, and a windproof softshell or hardshell as an outer layer. Be prepared to add an additional insulating layer, such as a down or synthetic insulated jacket, during breaks or at the summit. Crampons or microspikes are not necessary, but rain gear should be carried as a precaution.
The risk of thunderstorms is low, and strong winds are not at a level to necessitate stopping activity. However, the long ridge routes of Mount Chokai are susceptible to wind effects, so be mindful of gusts and maintain adequate cold weather protection. After sunset, temperatures will drop to around 5 degrees Celsius, with gusts up to 12.7 m/s, requiring strict cold weather preparation for any nighttime activity. While the risk of hypothermia is low during the day, it becomes a concern at night.
山岳ガイド — Mountain Guide
概要 Overview
山形県と秋田県の県境に位置する標高2,236mの独立峰。日本海に裾野を伸ばす山容から「出羽富士」「秋田富士」と呼ばれる東北を代表する活火山。山頂付近は岩稜帯と高山植物のお花畑が広がる。
特徴・地形 Features
独立峰のため山頂からの展望は360度のパノラマ。新山(しんざん)と呼ばれる溶岩ドームが最高地点で、岩塊の積み重なる急斜面を慎重に通過する必要がある。雪渓が秋まで残ることが多い。
ベストシーズン Best Season
7月〜9月が一般登山シーズン。お花畑のピークは7月中旬〜8月。残雪・初冠雪の境界期は装備判断に注意。
主要ルート Main Routes
鉾立(象潟口)コース、湯ノ台コース、矢島口コース、吹浦口コース。鉾立は最も一般的。
注意点・危険箇所 Cautions
新山周辺の岩塊地帯は浮石・滑落リスクが高い。日本海からの濃霧・強風が頻発。雷雨・低体温症対策必須。
アクセス Access
JR羽越線象潟駅・酒田駅からバスで各登山口へ。マイカーは鉾立まで車道あり。
※ 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。