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Rule Mirror Lake

Ha Long Bay - Mirror Lake - Vietnam

Ha Long, Quảng Ninh, Vietnam

Perfectly calm water for flawless reflections

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Asia/Bangkok
mirror-lake weather icon
Next opportunity
Perfect Mirror Reflections
Ha Long Bay
Today · 21:00–24:00 · 3h window
Medium confidence
48%
💨Wind Speed0.7-0.8m/s
mirror-lake weather icon
Perfect Mirror Reflections
Ha Long Bay
Mon, Apr 13 · 16:00–17:00
💨Wind Speed:0.9m/s
Medium
mirror-lake weather icon
Glassy Mirror Reflections (glassy)
Ha Long Bay
Wed, Apr 15 · 14:00–17:00
💨Wind Speed:0.5-0.9m/s
Low
mirror-lake weather icon
Perfect Mirror Reflections at Sunset
Ha Long Bay
Wed, Apr 15 · 17:00–18:00
💨Wind Speed:0.6m/s
Medium
mirror-lake weather icon
Perfect Mirror Reflections
Ha Long Bay
Sat, Apr 18 · 13:00–14:00
💨Wind Speed:0.7m/s
Medium

What this forecast looks for

Plain-language explanation from the rule

This forecast tracks conditions for reflection photography across Vietnam's diverse water features, from the emerald waters of Ha Long Bay to flooded rice terraces cascading down mountain slopes. We analyze wind speed, cloud cover, water levels, and seasonal agricultural patterns to predict when mirror-like surfaces create symmetrical compositions.

Vietnam offers exceptional reflection opportunities year-round, but they vary dramatically by season and location. Ha Long Bay and Ninh Binh provide reflections of limestone karsts in emerald and jade-green waters. Rice terraces at Sapa and Mu Cang Chai become reflective during planting season (May-June) when paddies are flooded. Ancient towns like Hoi An create lantern reflections in the Thu Bon River.

What makes Vietnam reflection photography distinctive:

  • Karst water reflections - Ha Long Bay's limestone islands and Ninh Binh's Tam Coc karsts create perfect natural symmetry in calm emerald waters
  • Flooded rice terraces - Sapa and Mu Cang Chai terraces become giant mirrors during planting season, reflecting sky colors at dawn and dusk
  • Ancient town waters - Hoi An's Thu Bon River doubles the visual impact of yellow buildings and colorful lanterns during evening hours
  • Imperial reflections - Hue's Perfume River mirrors royal tombs, pagodas, and the historic citadel under calm conditions

Ha Long Bay requires calm conditions—early morning (before 9 AM) or late afternoon typically offer the best chance before tourist boats disturb waters. December through February dry season provides calmest conditions. Ninh Binh's Tam Coc area works similarly, with boat-free early morning hours (6-8 AM) essential for undisturbed reflections among the karsts. Rice terrace reflections at Sapa and Mu Cang Chai require precise timing—May and June during planting when fields are flooded but crops haven't grown. Hoi An's river reflections work best from 5-8 PM during blue hour when lanterns are lit but water remains calm.

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72-hour requirements breakdown

What passed or failed, hour by hour
4matching hours in the next 95 hoursJump to next match
AND logic: all conditions required
Meets requirement
Misses requirement
Time
Asia/Bangkok
Wind Speed
≤ 1.0m/s
Wind Gusts
≤ 2.0m/s
Precipitation Chance
≤ 10.0%
Visibility
≥ 5000.0m
Wed, Apr 8
08:003m/s6.2m/s0%24135m
09:003.3m/s6.8m/s0%24134m
10:003.6m/s7.3m/s0%24135m
11:003.5m/s7.2m/s0%24134m
12:003.7m/s6.9m/s0%24134m
13:003.8m/s7.1m/s0%24135m
14:003.4m/s6.3m/s0%19784m
15:003m/s5.8m/s0%24134m
16:003.5m/s6.2m/s0%24135m
17:003.4m/s6.5m/s0%19260m
18:003.2m/s8m/s0%24135m
19:002.9m/s7.8m/s0%24134m
20:002.7m/s7m/s0%24134m
21:002m/s5.2m/s0%24134m
22:000.99m/s1.1m/s0%24135m
23:001.6m/s2.1m/s0%24135m
Thu, Apr 9
24:001.5m/s1.9m/s0%24134m
01:001.1m/s1.2m/s0%24135m
02:002.1m/s8.2m/s0%24135m
03:002m/s7.7m/s0%24134m
04:002.8m/s6.7m/s0%24134m
05:002.3m/s5.2m/s0%24135m
06:001.3m/s1.8m/s0%24135m
07:001.7m/s5.8m/s0%24135m
08:002.1m/s5.6m/s0%24134m
09:002.6m/s5.3m/s0%24135m
10:003.3m/s5.6m/s0%18530m
11:004m/s6.2m/s0%18369m
12:004.5m/s6.6m/s0%18441m
13:004.2m/s6.1m/s0%19252m
14:003.8m/s5.1m/s0%18498m
15:003m/s4.3m/s0%18445m
16:002.8m/s3.9m/s0%18775m
17:003m/s4.5m/s0%18717m
18:002m/s3.6m/s0%24135m
19:002.1m/s3.3m/s0%24135m
20:001.6m/s1.6m/s0%24135m
21:000.81m/s0.91m/s0%24134m
22:000.8m/s0.8m/s0%24135m
23:000.66m/s0.71m/s0%24134m
Fri, Apr 10
24:001.2m/s1.1m/s0%24134m
01:001.4m/s1.7m/s0%24135m
02:001.8m/s3.4m/s0%24135m
03:001.7m/s2.6m/s0%24134m
04:001.7m/s3.3m/s0%24134m
05:001.6m/s2.1m/s0%24135m
06:001.6m/s2m/s0%24134m
07:001.1m/s4.8m/s0%24135m
08:001.9m/s4.8m/s0%24134m
09:002.8m/s5.5m/s0%24134m
10:003.5m/s5.3m/s0%18485m
11:003.9m/s5.2m/s0%18440m
12:004.1m/s5.3m/s0%18434m
13:003.8m/s4.9m/s0%18415m
14:003.3m/s3.8m/s0%18483m
15:003.1m/s3.2m/s0%24134m
16:003.2m/s3.8m/s0%18718m
17:003.1m/s4.5m/s0%18980m
18:002.3m/s4.1m/s0%24134m
19:002m/s3.4m/s0%24134m
20:001.9m/s2.4m/s0%24134m
21:001.6m/s1.6m/s0%24134m
22:001.4m/s1.4m/s0%24134m
23:001m/s1m/s0%24134m
Sat, Apr 11
24:001.6m/s2.7m/s0%24135m
01:002.4m/s6.8m/s0%24135m
02:002.6m/s6.2m/s0%24135m
03:002.4m/s5.8m/s0%24134m
04:002.1m/s4.3m/s0%24135m
05:002.2m/s4.5m/s0%24134m
06:001.8m/s3.4m/s0%24135m
07:001.7m/s4.9m/s0%24134m
08:002m/s4.6m/s0%24134m
09:002.4m/s4.9m/s0%24134m
10:003.1m/s5.4m/s0%18537m
11:003.8m/s5.5m/s0%18362m
12:003.9m/s5.2m/s0%18386m
13:004.1m/s5.1m/s0%18373m
14:003.3m/s4.9m/s0%20294m
15:002.5m/s4.7m/s0%22214m
16:001.8m/s4.5m/s0%24135m
17:002.1m/s6.3m/s0%24135m
18:002.4m/s8m/s0%24135m
19:002.7m/s9.7m/s0%24135m
20:002.6m/s8.1m/s0%24135m
21:002.4m/s6.4m/s0%24135m
22:002.3m/s4.7m/s0%24135m
23:002.2m/s5.5m/s0%24135m
Sun, Apr 12
24:002.2m/s6.2m/s0%24135m
01:002.1m/s6.9m/s0%24135m
02:002.4m/s6.4m/s0%24135m
03:002.7m/s6m/s0%24135m
04:003m/s5.5m/s0%24135m
05:003.2m/s5.3m/s0%22256m
06:003.4m/s5m/s0%20376m
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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