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Rule Mirror Lake

Beddgelert - Mirror Lake - Snowdonia (Eryri)

Beddgelert, Wales, United Kingdom

Perfectly calm water for flawless reflections

No opportunities right now
Here’s what usually blocks matches

No Mirror Lake opportunities in the next 14 days

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Rule requirements (key thresholds)
Wind Speed · ≤ 1.0m/s Wind Gusts · ≤ 2.0m/s Precipitation Chance · ≤ 10.0% Visibility · ≥ 5000.0m

Tip: Scroll down to the 72-hour table to see exactly which condition fails hour by hour.

Most common blockers (next 72 hours)
Wind Speed 100% failing
Precipitation Chance 99% failing
Wind Gusts 92% failing

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/London

No opportunities in the next 10 days

See the blocker timeline below to understand which conditions are preventing matches.

What this forecast looks for

Plain-language explanation from the rule

This forecast identifies when calm conditions and clear skies align for perfect mirror reflections on Snowdonia's mountain lakes. We track wind speed, cloud cover, and atmospheric stability to predict when Llyn Padarn, Llyn Ogwen, and other tarns become mirror-still.

Snowdonia's glacial lakes—scoured by Ice Age glaciers into deep mountain-flanked basins—create some of Wales's most iconic reflection photography. Llyn Padarn reflects the Snowdon massif and historic Dolbadarn Castle, Llyn Ogwen mirrors Tryfan's distinctive rocky profile, and smaller tarns throughout the national park offer intimate reflection compositions with dramatic mountain backdrops.

What makes Snowdonia reflection photography distinctive:

  • Snowdon massif - Llyn Padarn and Llyn Gwynant reflect Wales's highest peaks with morning alpenglow
  • Tryfan's profile - Llyn Ogwen mirrors the distinctive rocky north face and three prominent buttresses
  • Historic elements - Dolbadarn Castle tower reflected in Llyn Padarn adds medieval narrative
  • Glacial tarns - Cwm Idwal and mountain pools create intimate reflection compositions in cirques

The most reliable reflection conditions occur during settled high-pressure periods, particularly in autumn (September-November) when winds are calmer than spring and summer. Dawn offers the best chance of mirror-calm before valley winds develop—Llyn Padarn is typically stillest in the hour after sunrise. The lake's eastern orientation means morning light illuminates the Snowdon massif beautifully while water remains calm. Llyn Ogwen requires careful timing—its exposed position means wind-free mornings are precious. Position yourself at the eastern end near the Ogwen Cottage climbing hut to capture Tryfan's full profile reflected in calm water. Capel Curig's smaller pools offer intimate reflection opportunities with less exposure to wind. Nant Gwynant valley's Llyn Gwynant reflects surrounding peaks with particularly calm conditions in its sheltered upper reaches. Winter and spring mornings occasionally deliver snow-covered peaks reflected in dark water—one of Snowdonia's signature compositions.

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72-hour requirements breakdown

What passed or failed, hour by hour
0matching hours in the next 85 hours
AND logic: all conditions required
Meets requirement
Misses requirement
Time
Europe/London
Wind Speed
≤ 1.0m/s
Wind Gusts
≤ 2.0m/s
Precipitation Chance
≤ 10.0%
Visibility
≥ 5000.0m
Sun, Jun 7
06:006.7m/s12m/s95%138m
07:007.4m/s12m/s99%196m
08:007m/s12m/s83%293m
09:007m/s12m/s83%18777m
10:008.2m/s12m/s83%16717m
11:008.6m/s13m/s85%23401m
12:008.6m/s13m/s88%16702m
13:008.6m/s14m/s90%23095m
14:009.7m/s14m/s93%12299m
15:009.9m/s15m/s91%13587m
16:008.8m/s14m/s90%20614m
17:007.7m/s13m/s93%23209m
18:006.7m/s13m/s96%15462m
19:005.8m/s12m/s99%18173m
20:005.3m/s12m/s100%22847m
21:005.1m/s12m/s100%13349m
22:004.9m/s12m/s100%12207m
23:004.7m/s12m/s100%8025m
Mon, Jun 8
24:005.3m/s12m/s100%7032m
01:006.6m/s13m/s100%5425m
02:006.2m/s12m/s97%1040m
03:004.1m/s8.2m/s94%143m
04:002m/s3.1m/s91%707m
05:001.3m/s1.5m/s93%18128m
06:002.1m/s2.6m/s95%2707m
07:001.8m/s2.8m/s97%17126m
08:002.2m/s4.2m/s65%23270m
09:002.6m/s4.1m/s32%24134m
10:003.2m/s4.8m/s0%23034m
11:004.4m/s6m/s27%13949m
12:004.7m/s6.4m/s55%23385m
13:004.9m/s6.8m/s82%24135m
14:005.8m/s7.4m/s85%24135m
15:005.9m/s7.4m/s88%24135m
16:007m/s7.9m/s92%20781m
17:006.4m/s8.2m/s94%20361m
18:006.4m/s8.7m/s96%12533m
19:005.4m/s9m/s98%18184m
20:005.4m/s9.9m/s98%13288m
21:004.9m/s10m/s99%22829m
22:005.3m/s12m/s99%19911m
23:005.1m/s11m/s99%14166m
Tue, Jun 9
24:005.4m/s11m/s99%12703m
01:004.7m/s10m/s99%15913m
02:004.4m/s9.9m/s99%18080m
03:003.8m/s10m/s98%21163m
04:003.6m/s9.9m/s98%20093m
05:004.8m/s11m/s98%24134m
06:005.6m/s11m/s99%17607m
07:006.8m/s12m/s100%13186m
08:007.6m/s11m/s95%23254m
09:006.1m/s10m/s90%23107m
10:006.2m/s11m/s85%24134m
11:007m/s11m/s89%24135m
12:009.2m/s12m/s92%23546m
13:009m/s11m/s96%23879m
14:008.9m/s12m/s95%18583m
15:008.4m/s11m/s94%16518m
16:008m/s11m/s93%21890m
17:007.8m/s10m/s93%19911m
18:007.1m/s9.7m/s94%21359m
19:006m/s9.4m/s95%13882m
20:005.1m/s9.7m/s79%12673m
21:003.8m/s9.4m/s64%24134m
22:002.3m/s3.1m/s49%24135m
23:001.6m/s1.8m/s64%23884m
Wed, Jun 10
24:001.3m/s1.2m/s79%23418m
01:001.6m/s1.5m/s95%23088m
02:003m/s3.9m/s96%20208m
03:004.4m/s6.2m/s97%17327m
04:005.8m/s8.6m/s98%14447m
05:006.3m/s8.8m/s98%17369m
06:006.8m/s9.1m/s99%20291m
07:007.3m/s9.3m/s99%23213m
08:007.3m/s9.3m/s98%20775m
09:007.3m/s9.3m/s97%18338m
10:007.3m/s9.4m/s96%15900m
11:005.3m/s6.9m/s97%17243m
12:003.3m/s4.4m/s98%18585m
13:001.3m/s2m/s99%19927m
14:001.7m/s2m/s78%21330m
15:002m/s2.1m/s58%22732m
16:002.3m/s2.2m/s37%24135m
17:002.2m/s2.1m/s35%24135m
18:002m/s2m/s33%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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