Rule Mirror Lake

Mirror Lake Forecast for Ha Long Bay, Vietnam

Ha Long, Quảng Ninh, Vietnam

The view layers Ha Long Bay's limestone towers from a boat or high viewpoint, using a junk silhouette and open water to separate overlapping karst forms.

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Asia/Bangkok

Next opportunity

Perfect Mirror Reflections

Ha Long Bay

Sat, Sep 12 · 13:00–14:00 · 1h window

Medium confidence

48%

💨Wind Speed0.7m/s

How this forecast is evaluated

See which weather signals PhotoWeather uses to identify Mirror Lake conditions across Vietnam. The requirements and hourly values below show how those signals apply at Ha Long Bay.

Explore Mirror Lake conditions across Vietnam →

Recorded match history

Completed PhotoWeather forecast matches recorded for this exact rule at Ha Long Bay during the last 365 days.

Last 30 days

recorded matching windows · 65% average confidence

Last 90 days

recorded matching windows · 64% average confidence

Last 365 days

recorded matching windows · 66% average confidence

Most represented month

April, with 25 of 70 matches recorded in the last 365 days.

These figures use completed PhotoWeather MatchEvent records from the previous 365 days only. They describe recorded forecast matches, not observations, climatological probability, or a guarantee of future conditions.

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95-hour requirements breakdown

When available, the detailed table below covers only the stated 95-hour horizon (typically 72–168 hours, depending on available hourly data). Opportunity records above span the next 14 days, so this table does not explain that entire 14-day period.

What passed or failed, hour by hour

5matching 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
Mon, Sep 7
05:00	1.4m/s	1.4m/s	66%	24135m
06:00	1.4m/s	1.4m/s	76%	24134m
07:00	1.2m/s	1.6m/s	86%	24134m
08:00	0.93m/s	1.4m/s	81%	24134m
09:00	0.42m/s	0.8m/s	78%	24134m
10:00	0.87m/s	0.62m/s	76%	24135m
11:00	1.5m/s	1m/s	79%	11545m
12:00	2.3m/s	1.8m/s	82%	24134m
13:00	2.4m/s	2.2m/s	84%	12851m
14:00	2.7m/s	3.2m/s	56%	24134m
15:00	2.3m/s	2.6m/s	28%	24135m
16:00	2.4m/s	2.5m/s	0%	24135m
17:00	2m/s	2.5m/s	0%	24135m
18:00	1.7m/s	1.8m/s	0%	24135m
19:00	1.5m/s	1.7m/s	0%	24135m
20:00	0.97m/s	1.1m/s	12%	24135m
21:00	0.82m/s	1m/s	0.61%	24134m
22:00	0.35m/s	0.52m/s	0.91%	24134m
23:00	0.63m/s	0.71m/s	1.8%	24134m
Tue, Sep 8
24:00	0.6m/s	0.52m/s	2.6%	24134m
01:00	0.8m/s	0.73m/s	3.5%	24118m
02:00	1.2m/s	1.1m/s	13%	24135m
03:00	1.2m/s	1.2m/s	26%	24135m
04:00	1.2m/s	1.2m/s	39%	24135m
05:00	1.1m/s	1.1m/s	47%	24134m
06:00	1.1m/s	1.1m/s	56%	24135m
07:00	0.96m/s	1.3m/s	64%	24135m
08:00	0.85m/s	1.2m/s	58%	24135m
09:00	0.74m/s	0.6m/s	52%	24135m
10:00	1m/s	0.9m/s	47%	24135m
11:00	1.5m/s	1.2m/s	48%	24135m
12:00	2.4m/s	1.5m/s	49%	24134m
13:00	2.9m/s	2.9m/s	50%	24134m
14:00	2.1m/s	2.3m/s	34%	24135m
15:00	2m/s	2m/s	19%	24135m
16:00	2.2m/s	2.1m/s	3.5%	24135m
17:00	1.9m/s	2.5m/s	15%	24135m
18:00	1.5m/s	1.6m/s	27%	24135m
19:00	1.3m/s	1.6m/s	39%	24135m
20:00	1m/s	1.3m/s	33%	24135m
21:00	1.2m/s	1.6m/s	28%	24134m
22:00	1.2m/s	1.5m/s	22%	24135m
23:00	0.7m/s	0.92m/s	25%	24135m
Wed, Sep 9
24:00	0.78m/s	0.9m/s	27%	24135m
01:00	1.2m/s	1.2m/s	30%	24134m
02:00	0.87m/s	0.92m/s	45%	24134m
03:00	0.75m/s	0.8m/s	60%	24135m
04:00	0.88m/s	0.8m/s	75%	24134m
05:00	1.2m/s	1.1m/s	82%	24134m
06:00	1.2m/s	1.1m/s	89%	24135m
07:00	1.1m/s	1.4m/s	97%	23812m
08:00	1.1m/s	2m/s	90%	20099m
09:00	1.7m/s	2.9m/s	83%	12236m
10:00	2.1m/s	3.6m/s	76%	24134m
11:00	2.8m/s	4.4m/s	76%	24135m
12:00	3.3m/s	4.9m/s	76%	24135m
13:00	3.8m/s	4.9m/s	76%	24135m
14:00	4.1m/s	5.2m/s	51%	24134m
15:00	4.2m/s	5.2m/s	25%	24134m
16:00	4.1m/s	5.2m/s	0%	24134m
17:00	3.2m/s	5.1m/s	21%	24134m
18:00	2.3m/s	4m/s	43%	24134m
19:00	2m/s	2.6m/s	64%	24134m
20:00	1.7m/s	2.1m/s	73%	24135m
21:00	1.6m/s	1.9m/s	82%	24134m
22:00	1.7m/s	1.9m/s	92%	24135m
23:00	1.7m/s	1.9m/s	91%	24135m
Thu, Sep 10
24:00	1.7m/s	2.1m/s	91%	24134m
01:00	1.8m/s	2.7m/s	90%	24134m
02:00	1.7m/s	2.5m/s	91%	24135m
03:00	1.9m/s	2.7m/s	92%	5813m
04:00	1.9m/s	2.6m/s	93%	5870m
05:00	1.9m/s	2.6m/s	94%	20379m
06:00	1.7m/s	2.4m/s	96%	24135m
07:00	1.9m/s	3.2m/s	98%	19972m
08:00	2.3m/s	3.8m/s	97%	23428m
09:00	2.8m/s	5.9m/s	96%	11969m
10:00	3.2m/s	7.8m/s	95%	9439m
11:00	2m/s	4.4m/s	96%	21098m
12:00	1.8m/s	4.2m/s	97%	24134m
13:00	1.3m/s	2.3m/s	98%	24134m
14:00	1.4m/s	2.4m/s	90%	24134m
15:00	1.6m/s	2.6m/s	82%	24135m
16:00	1.8m/s	2.7m/s	74%	24135m
17:00	1.8m/s	2.6m/s	79%	24135m
18:00	1.9m/s	2.4m/s	85%	24135m
19:00	1.9m/s	2.3m/s	90%	24135m
20:00	2m/s	2.6m/s	75%	24135m
21:00	2.1m/s	2.8m/s	59%	24135m
22:00	2.1m/s	3m/s	44%	24135m
23:00	2.2m/s	3.5m/s	37%	24135m
Fri, Sep 11
24:00	2.2m/s	4m/s	30%	24135m
01:00	2.2m/s	4.5m/s	23%	24135m
02:00	2.3m/s	4.2m/s	24%	24135m
03:00	2.4m/s	3.8m/s	24%	24135m

How to read: colored cells show whether each predicate requirement is met; highlighted rows mean the full rule matched (an opportunity).

How this forecast is made

Opportunities are threshold-based signals: PhotoWeather checks whether forecast conditions match the rules for a photography scenario. They are planning guidance, not guarantees. Forecasts can change as new model runs arrive, and confidence generally decreases farther into the forecast horizon, so recheck conditions before travelling.

The weather forecast foundation comes through Open-Meteo , which aggregates models from weather agencies. PhotoWeather applies condition-specific thresholds and derived calculations; not every condition uses every model or data input.

How opportunities work → Weather data sources →

Forecast generated

Sep 7, 2026, 9:52 PM UTC

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