現在筑波山山頂は霧雨、気温18.6℃、湿度98%だ。体感は21℃だが、風速が弱いため湿気による不快感がある。日中は弱い霧雨が続き、正午には曇り、午後には薄曇りへと推移する予報。降水は午前中のみで、午後は止む見込み。気温は日中19℃台後半まで上昇する。
地面コンディションは、現況の霧雨と高湿度、午前中の降水によりウェットから泥濘と判断する。特に奇岩怪石が多い御幸ヶ原コースや白雲橋コースの岩場区間では、雨に濡れて滑りやすくなっている。スリップに厳重な注意が必要だ。滑りにくい登山靴を選び、慎重に足元を確認しながら行動すること。
雷リスクは低い。降水確率は午前中49%、午後も84%と高いが、降水量は少ない。雷発生の兆候は見られない。突風は最大8.9m/sで、行動に支障はない。気温は18-20℃前後で推移し、低体温症の直接的なリスクは低い。しかし、濡れた状態で風に当たると体感温度が下がるため、防水透湿性の雨具(上下)は必ず携行し、適宜着用すること。ベースレイヤーは速乾性素材、ミッドレイヤーには薄手のフリースや化繊シャツが適切だ。
夕方以降は薄曇りからほぼ晴れに転じ、降水も止む見込みだ。気温は緩やかに低下するが、夜間も17-18℃台で推移するため、行動には問題ない。ただし、日中の湿った路面は夜間になっても乾ききらない可能性があるため、下山時も引き続き足元に注意を払うこと。
茨城県
筑波山
Mt. Tsukuba
2026年7月18日 06:54 更新
霧雨で濡れた岩場。滑落に厳重警戒
Wet and humid conditions on Tsukuba. Exercise caution on slippery rock
現在の気象状況 — Current Conditions
▲ 山頂エリア (Summit)
気温 Temp
+18.6°C
風速 Wind
1.3m/s
ESE
天候 Weather
🌦️ 霧雨
体感 Feels Like
+21°C
▼ 登山口・山麓エリア (Base)
気温 Temp
+22.4°C
風速 Wind
1.4m/s
ESE
天候 Weather
🌦️ 霧雨
標高 Altitude
269m
山頂の3時間予報 — Summit Forecast
09:00
+19°C
1.5m/s
ESE
💧 0.1mm
(49%)
12:00
+19°C
1.5m/s
ESE
💧 0mm
(80%)
15:00
+20°C
1.7m/s
ESE
💧 0mm
(84%)
18:00
+19°C
1.8m/s
SE
💧 0mm
(67%)
21:00
+19°C
1.5m/s
SE
💧 0mm
(18%)
00:00
+18°C
1.1m/s
SSE
💧 0mm
(4%)
03:00
+18°C
0.9m/s
SSE
💧 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, Tsukuba-san summit is experiencing light rain with a temperature of 18.6°C and 98% humidity. The perceived temperature is 21°C, but the low wind speed contributes to discomfort due to the high humidity. Light rain is expected to continue throughout the morning, transitioning to cloudy by noon and partly cloudy in the afternoon. Precipitation is forecast only for the morning, clearing up by the afternoon. Daytime temperatures will rise to the upper 19°C range.
Ground conditions are assessed as wet to muddy due to the current light rain, high humidity, and morning precipitation. Particular caution is needed on the rocky sections of courses like Miyukigahara Course and Shirakumobashi Course, which are known for their strange rock formations. These areas will be slippery when wet, increasing the risk of falls. Choose non-slip hiking boots and proceed with careful footing.
The risk of lightning is low, despite high precipitation probabilities of 49% in the morning and 84% in the afternoon, as the amount of rainfall is minimal and there are no signs of lightning activity. Gusts will reach a maximum of 8.9 m/s, which is not strong enough to impede movement. Temperatures ranging from 18-20°C mean the direct risk of hypothermia is low. However, getting wet and exposed to wind can lower the perceived temperature, so waterproof and breathable rain gear (top and bottom) is essential and should be worn as needed. A quick-drying base layer and a thin fleece or synthetic shirt as a mid-layer are appropriate.
Towards evening, the weather is expected to improve from partly cloudy to mostly clear, with precipitation ceasing. Temperatures will gradually drop but remain in the 17-18°C range overnight, posing no issues for activity. However, the wet trails from earlier in the day may not fully dry out by nightfall, so continue to exercise caution on your descent.
Ground conditions are assessed as wet to muddy due to the current light rain, high humidity, and morning precipitation. Particular caution is needed on the rocky sections of courses like Miyukigahara Course and Shirakumobashi Course, which are known for their strange rock formations. These areas will be slippery when wet, increasing the risk of falls. Choose non-slip hiking boots and proceed with careful footing.
The risk of lightning is low, despite high precipitation probabilities of 49% in the morning and 84% in the afternoon, as the amount of rainfall is minimal and there are no signs of lightning activity. Gusts will reach a maximum of 8.9 m/s, which is not strong enough to impede movement. Temperatures ranging from 18-20°C mean the direct risk of hypothermia is low. However, getting wet and exposed to wind can lower the perceived temperature, so waterproof and breathable rain gear (top and bottom) is essential and should be worn as needed. A quick-drying base layer and a thin fleece or synthetic shirt as a mid-layer are appropriate.
Towards evening, the weather is expected to improve from partly cloudy to mostly clear, with precipitation ceasing. Temperatures will gradually drop but remain in the 17-18°C range overnight, posing no issues for activity. However, the wet trails from earlier in the day may not fully dry out by nightfall, so continue to exercise caution on your descent.
山岳ガイド — Mountain Guide
概要 Overview
茨城県つくば市の標高877mの双耳峰(男体山・女体山)。日本百名山の中で最も標高が低く、関東平野から特徴的な姿を望むことができる。古来より「西の富士、東の筑波」と並び称されてきた信仰の山。
特徴・地形 Features
男体山と女体山の二峰からなり、両峰の間には御幸ヶ原。奇岩怪石(弁慶七戻り、ガマ石など)が点在する独特の地形。ケーブルカー・ロープウェイで気軽にアクセス可能。
ベストシーズン Best Season
通年登山可能。紅葉は11月中旬。冬季は山頂部凍結に注意。アジサイは6月、桜は4月初旬。
主要ルート Main Routes
御幸ヶ原コース(最一般的)、白雲橋コース、おたつ石コース、ケーブルカー・ロープウェイ。
注意点・危険箇所 Cautions
標高は低いが冬季の凍結・突風に注意。岩場区間でのスリップ事故が散発。混雑期の登山道渋滞。
アクセス Access
つくばエクスプレスつくば駅からシャトルバス。常磐道土浦北ICから車。
※ 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。