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Rule Dark Skies

Dark Skies Forecast for Canadian Rockies

Alberta / British Columbia, Canada

Astrophotography forecast for Canadian Rockies. Track dark sky conditions at Jasper Dark Sky Preserve.

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in America/Edmonton
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Next opportunity
Good Dark Skies
Invermere
Mon, Aug 24 · 02:00–04:00 · 2h window
Low confidence
36%
🌛Moon Altitude-3.7-3°
☁️Total Cloud Coverage16.2-19.5%
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Pristine Dark Skies (pristine)
Miette
Mon, Aug 24 · 03:00–04:00
🌛Moon Altitude:-4.4°
Medium
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Excellent Dark Skies (pristine)
Revelstoke
Mon, Aug 24 · 04:00–04:43
🌛Moon Altitude:-10.4°
Medium
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Pristine Dark Skies (pristine)
Nordegg
Tue, Aug 25 · 02:00–04:26
🌛Moon Altitude:-3.6-8.5°
Low
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Pristine Dark Skies (pristine)
Canmore
Tue, Aug 25 · 02:00–04:34
🌛Moon Altitude:-3.1-9.5°
Low
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Pristine Dark Skies (pristine)
Castle Junction
Tue, Aug 25 · 02:00–04:35
🌛Moon Altitude:-2.9-9.6°
Low
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Pristine Dark Skies (pristine)
Banff
Tue, Aug 25 · 02:00–04:34
🌛Moon Altitude:-3-9.5°
Low
+14 more windows in the next 14 days

Astrophotography forecast for Canadian Rockies. Track dark sky conditions at Jasper Dark Sky Preserve.

This rule looks for true astronomical night, cloud cover no higher than 20%, visibility of at least 12 km, precipitation probability no higher than 10%, and either Moon illumination no higher than 35% or Moon altitude no higher than 10°. It does not calculate Galactic Centre or Milky Way core altitude; check a sky planner for the subject's position.

This forecast tracks astronomical darkness, cloud cover, visibility, precipitation probability, and moon interference at Jasper National Park—one of the world's largest accessible Dark Sky Preserves. Local Bortle darkness and astronomical seeing are not part of the rule and must be checked separately.

Jasper National Park covers over 11,000 square kilometers of protected darkness, with virtually no light pollution across the entire preserve. The combination of high elevation, dry continental air, and minimal artificial light makes this one of the finest astrophotography locations in North America.

What makes Jasper astrophotography exceptional:

  • Certified Dark Sky Preserve - Jasper holds one of the largest Dark Sky Preserve designations worldwide
  • Bortle 1-2 skies - True dark sky conditions where the Milky Way casts shadows and zodiacal light is visible
  • Mountain silhouettes - Dramatic peaks provide compelling foregrounds for Milky Way compositions
  • Accessibility - Unlike many dark sky locations, Jasper offers easy access with full services and accommodations

Best conditions occur during new moon periods from June through September, when the Milky Way galactic core is visible. Autumn brings earlier darkness and occasional aurora activity as a bonus. Popular locations include Medicine Lake, Pyramid Lake, and Maligne Lake, but nearly anywhere away from Jasper townsite offers exceptional darkness.

Location status

0 of 10 locations currently active

Banff

Inactive

Banff opens onto Lake Louise and Moraine Lake, while Bow Valley fog inversions and Vermilion Lakes alpenglow shape layered mountain scenes.

Banff, Alberta, Canada

Right now: Total Cloud Coverage too high (100%, ≤ 20.0%)

Next opportunity in ~2 days 13h

2 opportunities in next 14 days

View forecast

Canmore

Inactive

Canmore sits below the Three Sisters and other steep limestone peaks, with the Bow River supplying bends, gravel bars, and calm reflections.

Canmore, Alberta, Canada

Right now: Total Cloud Coverage too high (84%, ≤ 20.0%)

Next opportunity in ~2 days 13h

2 opportunities in next 14 days

View forecast

Kananaskis

Inactive

Kananaskis combines turquoise lakes, larch forests, broad valleys, and serrated peaks, with quieter shorelines for foreground-led compositions.

Kananaskis, Alberta, Canada

Right now: Total Cloud Coverage too high (99%, ≤ 20.0%)

Next opportunity in ~2 days 13h

2 opportunities in next 14 days

View forecast

Castle Junction

Inactive

Castle Junction lies beneath Castle Mountain beside the Bow River, where braided channels, conifers, and valley mist create layered views.

Castle Junction, Alberta, Canada

Right now: Total Cloud Coverage too high (43%, ≤ 20.0%)

Next opportunity in ~2 days 13h

2 opportunities in next 14 days

View forecast

Cochrane

Inactive

Cochrane occupies rolling foothill country east of the Rockies, allowing prairie fences and open grassland to lead toward distant peaks.

Cochrane, Alberta, Canada

Right now: Total Cloud Coverage too high (100%, ≤ 20.0%)

Next opportunity in ~2 days 13h

1 opportunity in next 14 days

View forecast

Miette

Inactive

The Miette area of Jasper features a narrow mountain valley, folded ridges, forests, and hot-springs terrain suited to compressed landscape layers.

Miette, Alberta, Canada

Right now: Astronomical Night: Outside time window

Next opportunity in ~1 day 14h

3 opportunities in next 14 days

View forecast

Nordegg

Inactive

Nordegg gives access to the North Saskatchewan valley, Abraham Lake's broad shoreline, Crescent Falls, and rugged eastern-slope ridges.

Nordegg, Alberta, Canada

Right now: Total Cloud Coverage too high (79%, ≤ 20.0%)

Next opportunity in ~2 days 13h

2 opportunities in next 14 days

View forecast

Revelstoke

Inactive

Revelstoke is enclosed by the Selkirk and Monashee ranges, with the Columbia River, dense forest, and heavy winter snow shaping broad scenes.

Revelstoke, British Columbia, Canada

Right now: Total Cloud Coverage too high (21%, ≤ 20.0%)

Next opportunity in ~1 day 15h

3 opportunities in next 14 days

View forecast

Invermere

Inactive

Invermere overlooks Lake Windermere in the Columbia Valley, where open water, wetlands, and parallel mountain ranges create deep compositions.

Invermere, British Columbia, Canada

Right now: Astronomical Night: Outside time window

Next opportunity in ~1 day 13h

3 opportunities in next 14 days

View forecast

Valemount

Inactive

Valemount sits in a broad valley near Mount Robson, offering long views across wetlands and forest toward layered northern Rocky Mountain peaks.

Valemount, British Columbia, Canada

Right now: Astronomical Night: Outside time window

Next opportunity in ~2 days 13h

1 opportunity in next 14 days

View forecast

What's blocking opportunities

85-hour view of conditions preventing matches across 10 locations

Top 5 blocking conditions across 10 of 10 locations
Some blocked
Most blocked
21 Fri
22 Sat
23 Sun
24 Mon
25 Tue
24
06
12
18
24
06
12
18
24
06
12
18
24
06
Moon Illumination (≤ 35.0%)
100% blocked
Astronomical Night (Any)
78% blocked
Total Cloud Coverage (≤ 20.0%)
65% blocked
Precipitation Chance (≤ 10.0%)
55% blocked
Moon Altitude (≤ 10.0°)
10% blocked
How to read: Each row shows when a condition blocks opportunities. Stronger red means more locations are affected. These are the top 5 conditions preventing matches across the 85-hour forecast.

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.

Forecast generated

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