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Rule Mirror Lake

Mount Aso - Mirror Lake - Kyushu

Aso, Kumamoto, Japan

Perfectly calm water for flawless reflections

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Asia/Tokyo
mirror-lake weather icon
Next opportunity
Perfect Mirror Reflections at Sunset
Mount Aso
Tomorrow · 18:00–20:00 · 2h window
Medium confidence
45%
💨Wind Speed0.9m/s
mirror-lake weather icon
Perfect Mirror Reflections
Mount Aso
Mon, Jul 13 · 03:00–04:00
💨Wind Speed:1m/s
Medium
mirror-lake weather icon
Glassy Mirror Reflections (glassy) at Sunset
Mount Aso
Mon, Jul 13 · 18:00–19:00
💨Wind Speed:0.1m/s
Medium
mirror-lake weather icon
Glassy Mirror Reflections (glassy)
Mount Aso
Tue, Jul 14 · 24:00–02:00
💨Wind Speed:0.4-0.8m/s
Low

What this forecast looks for

Plain-language explanation from the rule

This forecast predicts mirror-calm water conditions for Kyushu's volcanic crater lakes, thermal spring ponds, and castle moats. We analyze wind speed, atmospheric stability, and tidal patterns to identify when reflections double the impact of the island's distinctive volcanic landscapes.

Kyushu's volcanic activity created numerous crater lakes in Kirishima highlands and Aso region, while onsen areas feature thermal-spring-fed ponds that rarely freeze. Historic Kumamoto Castle is surrounded by water features, and coastal areas offer sheltered bays for reflection photography. The subtropical climate means humidity-driven calm morning conditions.

What makes Kyushu reflection photography special:

  • Thermal spring mirrors - Lake Kinrinko in Yufuin fed by hot springs creates year-round reflections with Mount Yufu backdrop
  • Volcanic crater lakes - Kirishima highlands contain sacred lakes surrounded by volcanic peaks and mountain shrines
  • Castle moat reflections - Kumamoto Castle's defensive waters reflect reconstructed towers and original stone walls
  • Harbor twilight - Nagasaki's natural harbor provides sheltered water for city lights and hillside reflections

Lake Kinrinko delivers Kyushu's most reliable reflection photography—the spring-fed lake produces morning steam that lifts revealing perfect mirror conditions with Mount Yufu's twin peaks reflected. Best November through March before dawn when thermal mist settles leaving glass-calm water. Kirishima region contains sacred crater lakes surrounded by autumn color—arrive early as wind picks up by mid-morning. Kumamoto Castle's moats provide architectural reflections particularly beautiful when evening illumination begins. Nagasaki harbor at blue hour offers urban reflections with hillside buildings and city lights. Winter and early spring offer most consistent calm conditions.

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72-hour requirements breakdown

What passed or failed, hour by hour
2matching hours in the next 95 hoursJump to next match
AND logic: all conditions required
Meets requirement
Misses requirement
Time
Asia/Tokyo
Wind Speed
≤ 1.0m/s
Wind Gusts
≤ 2.0m/s
Precipitation Chance
≤ 10.0%
Visibility
≥ 5000.0m
Tue, Jul 7
22:000.95m/s0.9m/s26%24135m
23:001m/s1m/s13%24135m
Wed, Jul 8
24:001.3m/s1.2m/s0%8108m
01:001.4m/s1.6m/s0%9477m
02:001.7m/s2.3m/s0%11754m
03:001.9m/s2.7m/s0%8908m
04:001.6m/s2m/s39%8762m
05:001.8m/s2.2m/s39%24134m
06:001.8m/s2.3m/s39%24135m
07:001.8m/s2.5m/s58%24135m
08:001.6m/s2m/s76%24135m
09:001.5m/s1.8m/s95%24134m
10:001.5m/s2m/s93%24134m
11:001.5m/s1.9m/s96%24135m
12:001.8m/s2m/s98%24135m
13:001.8m/s2m/s98%24135m
14:001.3m/s1.6m/s99%24134m
15:001.2m/s1.8m/s99%24135m
16:000.85m/s1.1m/s94%17713m
17:001.3m/s1.5m/s88%10800m
18:001.7m/s2.4m/s82%14063m
19:001.6m/s1.8m/s82%21204m
20:001.2m/s1.3m/s82%24134m
21:001.5m/s1.8m/s82%22682m
22:001.9m/s2.3m/s55%24020m
23:002m/s2.6m/s27%24135m
Thu, Jul 9
24:002.3m/s2.8m/s0%9754m
01:002.4m/s3.3m/s0%7751m
02:002.6m/s3.5m/s0%17782m
03:002.6m/s3.6m/s0%24134m
04:002.6m/s3.7m/s0%24134m
05:002.5m/s3.8m/s0%24134m
06:002.4m/s3.7m/s0%24135m
07:002.6m/s4.1m/s0%24134m
08:002.4m/s3.5m/s0%24134m
09:002.1m/s3m/s0%24135m
10:001.7m/s2.4m/s13%24135m
11:001.8m/s2.5m/s26%24135m
12:001.9m/s2.6m/s39%24134m
13:001.9m/s2.4m/s47%24134m
14:001.7m/s1.9m/s56%24134m
15:001.7m/s1.4m/s64%24135m
16:002.1m/s1.4m/s43%24135m
17:001.7m/s2.6m/s21%22153m
18:000.9m/s0.9m/s0%24135m
19:000.89m/s0.9m/s0%24134m
20:001.9m/s2m/s0%24135m
21:002m/s2.1m/s0%24135m
22:002.1m/s2.5m/s0%24134m
23:002.3m/s2.8m/s0%24135m
Fri, Jul 10
24:002.5m/s3m/s0%24135m
01:002.6m/s3.3m/s0%24134m
02:002.7m/s3.7m/s0%8879m
03:002.6m/s3.7m/s0%7702m
04:002.5m/s3.5m/s0%7630m
05:002.8m/s3.7m/s0%8666m
06:002.7m/s3.8m/s0%9957m
07:002.2m/s3.4m/s5.6%24135m
08:002.3m/s3.3m/s11%24135m
09:002.3m/s3.2m/s17%24135m
10:002.3m/s3m/s29%24135m
11:002.6m/s3m/s41%24135m
12:002.7m/s3.1m/s52%24134m
13:003.4m/s3.9m/s51%24135m
14:003m/s3.4m/s49%24134m
15:002.9m/s3m/s47%24135m
16:003m/s3.3m/s31%24134m
17:002.8m/s3.6m/s16%24134m
18:002.1m/s3.8m/s0%24135m
19:002.1m/s2.3m/s0%24134m
20:002.3m/s3m/s0%24134m
21:002.6m/s3.5m/s0%24134m
22:002.7m/s3.8m/s0%24135m
23:002.9m/s4.2m/s0%24134m
Sat, Jul 11
24:002.8m/s4.2m/s0%9263m
01:002.9m/s4.3m/s13%4654m
02:003.1m/s4.7m/s26%3713m
03:003m/s4.6m/s39%5023m
04:003.1m/s4.9m/s39%11394m
05:003.1m/s5.3m/s39%17764m
06:003.1m/s5.6m/s39%24135m
07:003.1m/s5.6m/s59%24135m
08:003m/s5.5m/s80%24135m
09:003m/s5.4m/s100%24135m
10:002.8m/s5.1m/s72%24135m
11:002.5m/s4.7m/s43%24135m
12:002.3m/s4.3m/s15%24135m
13:002.5m/s4.4m/s18%19452m
14:002.7m/s4.5m/s21%14769m
15:002.9m/s4.5m/s24%10086m
16:002.9m/s4.2m/s16%14769m
17:002.8m/s3.9m/s7.8%19452m
18:002.7m/s3.6m/s0%24135m
19:002.7m/s3.5m/s13%24135m
20:002.7m/s3.4m/s26%24135m
How to read: colored cells show whether each predicate requirement is met; highlighted rows mean the full rule matched (an opportunity).

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