斜里岳山頂は現在曇り、気温4.8℃、体感は2.5℃。山麓との気温差は5℃以上ある。日中は曇りから薄曇りで推移し、風は終日穏やかで強風による行動制限はない。視程は良好に保たれる見込み。午前中にかけて気温は緩やかに上昇し、正午には山頂付近で体感7℃台まで上がるが、午後は再び低下傾向に転じる。
降水予報はないものの、斜里岳の旧道沢ルートは常に湿潤な状態であり、濡れた岩や苔、倒木による滑落リスクが高い。特に連続する滝を通過する際は、足元を慎重に確認し、グリップ力の高い登山靴で臨むこと。地面は全体的にウェットで泥濘箇所も予想される。
自動リスク判定によると、予報期間中に7℃の急激な気温低下が見込まれる。午後から夕方にかけて気温は大きく下がり、夜間には山頂付近で0℃近くまで冷え込む。行動中の体温維持のため、予備のフリースや薄手ダウンなど防寒レイヤーを必ず1枚多めに携行すること。濡れた状態は低体温症のリスクを著しく高めるため、早めの行動終了を推奨する。雷のリスクは低い。
北海道
斜里岳
Mt. Shari
2026年6月22日 07:15 更新
旧道沢筋は滑りやすい。濡れと急な冷え込みに備えよ
Wet and Slippery Conditions in Ravines. Prepare for Afternoon Cooling and Carry
現在の気象状況 — Current Conditions
▲ 山頂エリア (Summit)
気温 Temp
+4.8°C
風速 Wind
1.1m/s
ESE
天候 Weather
☁️ 曇り
体感 Feels Like
+2.5°C
▼ 登山口・山麓エリア (Base)
気温 Temp
+10°C
風速 Wind
0.6m/s
NNE
天候 Weather
☁️ 曇り
標高 Altitude
688m
山頂の3時間予報 — Summit Forecast
09:00
+7°C
1.1m/s
ESE
💧 0mm
(4%)
12:00
+8°C
0.9m/s
SE
💧 0mm
(25%)
15:00
+8°C
0.6m/s
E
💧 0mm
(43%)
18:00
+4°C
0.8m/s
E
💧 0mm
(14%)
21:00
+2°C
0.7m/s
ENE
💧 0mm
(2%)
00:00
+1°C
0.5m/s
ESE
💧 0mm
(2%)
03:00
0°C
1.4m/s
NW
💧 0mm
(16%)
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
Current conditions on Mt. Shari are cloudy with temperatures at the summit around 4.8°C, feeling like 2.5°C. Lower elevations are 10°C. Winds are light, under 5m/s gusting, ensuring good visibility of over 18km.
Throughout the day, temperatures will rise slightly to a peak of 8.3°C around noon before gradually dropping in the afternoon. Winds will remain light, posing no significant challenge. However, a significant temperature drop of 7°C is forecast from afternoon to early morning, with summit temperatures nearing 0°C overnight.
Ground conditions, especially on the Old Route (Kyudo) with its series of waterfalls, will be wet and slippery due to perpetually damp rocks and moss, despite no precipitation being forecast. Muddy sections are also likely. This route presents a specific slip and fall risk.
No snow or ice is present, so crampons or microspikes are not required. However, waterproof and windproof outerwear (jacket and pants) is essential for protection against wind and potential wetness, and as a crucial layer against the predicted temperature drop. Carry extra insulation layers, such as a fleece or light down jacket, to manage the sudden cooling. Good grip hiking boots are highly recommended for the wet terrain. While daytime climbing is feasible, be mindful of the afternoon temperature decline and the slippery conditions in the ravines. It is advisable to conclude your activity early. Avoid prolonged stops and maintain body warmth by consuming adequate food and water.
Throughout the day, temperatures will rise slightly to a peak of 8.3°C around noon before gradually dropping in the afternoon. Winds will remain light, posing no significant challenge. However, a significant temperature drop of 7°C is forecast from afternoon to early morning, with summit temperatures nearing 0°C overnight.
Ground conditions, especially on the Old Route (Kyudo) with its series of waterfalls, will be wet and slippery due to perpetually damp rocks and moss, despite no precipitation being forecast. Muddy sections are also likely. This route presents a specific slip and fall risk.
No snow or ice is present, so crampons or microspikes are not required. However, waterproof and windproof outerwear (jacket and pants) is essential for protection against wind and potential wetness, and as a crucial layer against the predicted temperature drop. Carry extra insulation layers, such as a fleece or light down jacket, to manage the sudden cooling. Good grip hiking boots are highly recommended for the wet terrain. While daytime climbing is feasible, be mindful of the afternoon temperature decline and the slippery conditions in the ravines. It is advisable to conclude your activity early. Avoid prolonged stops and maintain body warmth by consuming adequate food and water.
山岳ガイド — Mountain Guide
概要 Overview
北海道斜里郡清里町に位置する標高1,547mの百名山。オホーツク海に裾野を伸ばす独立峰の山容から「斜里富士」とも呼ばれる、知床エリアを代表する秀峰。
特徴・地形 Features
沢沿いに登る旧道(連続する滝の景観)と、稜線をたどる新道のループルートが特徴。山頂稜線は森林限界を超え、北海道らしい広大なパノラマが広がる。
ベストシーズン Best Season
7月〜9月中旬。沢ルートは増水・滑滝注意。残雪期はピッケル・アイゼン要。
主要ルート Main Routes
清岳荘起点・旧道〜山頂〜新道のループ(最一般的)、三井コース。
注意点・危険箇所 Cautions
旧道沢ルートは滝の連続で滑落事故が多発。沢の急増水時は通過不可。ヒグマ生息地。
アクセス Access
JR釧網本線清里町駅から車・タクシーで清岳荘へ。バス便はなし。
※ 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。