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Rule Blue Hour

Durdle Door - Blue Hour - Dorset & Jurassic Coast

Wool, England, United Kingdom

When city lights balance with the deep blue twilight sky

No opportunities right now
Here’s what usually blocks matches

No Blue Hour opportunities in the next 14 days

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Rule requirements (key thresholds)
Blue Hour · Any Blue Hour Quality · ≥ 65.0% Precipitation Chance · ≤ 15.0%

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

Most common blockers (next 72 hours)
Blue Hour Quality 100% failing
Blue Hour 88% failing
Precipitation Chance 51% failing

Currently

Real-time conditions
Cloud Cover22%
Moon Altitude-8.2°

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 tracks twilight conditions that transform the Jurassic Coast's landmarks into atmospheric scenes. We combine cloud cover, visibility, and twilight timing to predict optimal blue hour opportunities for lighthouse photography, natural arch silhouettes, and coastal twilight compositions.

The Jurassic Coast's dramatic geology creates powerful silhouettes during blue hour, while Portland Bill lighthouse provides one of Britain's finest twilight lighthouse compositions. The clean marine atmosphere along this coast often produces clear twilight skies with rich color gradients.

What makes the Jurassic Coast special for blue-hour photography:

  • Portland Bill - Red-and-white striped lighthouse beam cutting through dusk, dramatic tidal race visible below
  • Durdle Door - Limestone arch silhouetted against colorful twilight, long exposures smooth the sea
  • Swanage Pier - Victorian pier lights reflecting in calm bay water, Purbeck Hills backdrop
  • Old Harry Rocks - Chalk sea stacks profiled against eastern twilight glow

Portland Bill lighthouse offers Britain's finest lighthouse blue hour composition—the distinctive red-and-white striped tower sends its beam across darkening waters while the tidal race creates texture below. The lighthouse is accessible year-round, with the visitor center providing context. Durdle Door becomes a dramatic silhouette during blue hour—the arch perfectly frames remaining light on the western horizon. Long exposures smooth the sea into misty layers around the limestone. Swanage's Victorian pier with its period lighting creates nostalgic twilight compositions, with lights reflecting in the bay. Lulworth Cove takes on serene quality at twilight, with limestone cliffs darkening as the sky retains color. The timing requires planning—arrive well before sunset to compose, then shoot through the 20-30 minute blue hour window when artificial and natural light balance. Spring and autumn offer the most colorful twilights, while winter's earlier blue hour means shooting in milder conditions.

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72-hour requirements breakdown

What passed or failed, hour by hour
1matching hours in the next 95 hoursJump to next match
AND logic: all conditions required
Meets requirement
Misses requirement
Time
Europe/London
Blue Hour
Any
Blue Hour Quality
≥ 65.0%
Precipitation Chance
≤ 15.0%
Wed, Apr 8
02:008.4%0%
03:008.5%0%
04:008.3%0%
05:0055%0%
06:0058%0%
07:003.3%0%
08:003.3%0%
09:003.3%0%
10:003.5%0%
11:003%0%
12:003.5%0%
13:003.7%0%
14:003.2%0%
15:002.4%0%
16:002.6%0%
17:002.8%0%
18:003.4%0%
19:003.4%0%
20:0065%0%
21:0010%0%
22:0010%0%
23:009.8%0%
Thu, Apr 9
24:0010%0%
01:0010%0%
02:009.5%0%
03:007.5%0%
04:006.1%0%
05:0041%0%
06:0039%0%
07:002.3%0%
08:002.3%0%
09:002.4%0%
10:002.4%0%
11:002.4%0%
12:002.7%0%
13:001.2%0%
14:001%0%
15:002.2%0%
16:002.4%0%
17:002.4%0%
18:002.4%0%
19:001.9%0%
20:0038%0%
21:006.6%0%
22:007.4%0%
23:007.4%0%
Fri, Apr 10
24:007%0%
01:007.4%0%
02:007.4%0%
03:007.8%0%
04:005.2%0%
05:0034%0%
06:0034%0%
07:001.7%0%
08:001.7%13%
09:001.9%26%
10:001.8%39%
11:001.8%39%
12:001.7%39%
13:001.7%39%
14:001.5%26%
15:001.5%13%
16:001%0%
17:000.9%17%
18:001%33%
19:001.1%50%
20:0041%38%
21:005.8%25%
22:005.8%13%
23:005.8%16%
Sat, Apr 11
24:005.8%18%
01:005.8%21%
02:005.8%33%
03:002.8%44%
04:002.8%56%
05:0019%60%
06:0021%64%
07:001%69%
08:001.2%59%
09:002.1%49%
10:003.5%39%
11:003.4%33%
12:003.2%28%
13:003%22%
14:003%32%
15:003%42%
16:003%52%
17:003%60%
18:003%68%
19:003%76%
20:0061%72%
21:009.1%68%
22:009.1%64%
23:009.1%69%
Sun, Apr 12
24:009.1%75%
How to read: colored cells show whether each predicate requirement is met; highlighted rows mean the full rule matched (an opportunity).

What does Blue Hour Quality mean?

Inputs that drive the score

This derived score summarizes multiple raw weather signals. The table below shows the supporting inputs hour by hour, so you can see what's pushing the score up or down.

Time
Europe/London
Blue Hour
High Clouds
%
Low Clouds
%
Mid-Level Clouds
%
Relative Humidity
%
Solar Elevation
°
Total Cloud Coverage
%
Visibility
m
Wind Speed
m/s
Thu, Apr 9 Sunrise 06:27 Sunset 19:53
02:00
- 22% 1% 0% 90% -31° 22% 24134m 2m/s
03:00
- 43% 1% 0% 90% -27° 43% 24135m 2.2m/s
04:00
- 100% 4% 0% 91% -21° 100% 24135m 1.7m/s
05:00
- 100% 5% 0% 90% -14° 100% 24135m 1.8m/s
06:00
- 100% 5% 11% 91% -5° 100% 24134m 2.4m/s
07:00
- 100% 5% 100% 89% 4.4° 100% 24134m 1.5m/s
08:00
- 100% 5% 100% 87% 14° 100% 24134m 2m/s
09:00
- 100% 5% 74% 80% 23° 100% 24135m 3.6m/s
10:00
- 90% 1% 27% 73% 32° 90% 24134m 4.4m/s
11:00
- 100% 4% 94% 68% 39° 100% 24135m 5.7m/s
12:00
- 100% 3% 100% 64% 45° 100% 24135m 5.7m/s
13:00
- 100% 35% 100% 76% 47° 100% 24135m 6.4m/s
14:00
- 100% 100% 100% 80% 46° 100% 24135m 8.2m/s
15:00
- 100% 2% 100% 76% 41° 100% 24134m 5.9m/s
16:00
- 100% 4% 100% 73% 35° 100% 24135m 6.4m/s
17:00
- 100% 2% 100% 72% 26° 100% 24134m 6.4m/s
18:00
- 100% 3% 39% 73% 17° 100% 24134m 6.3m/s
19:00
- 100% 5% 5% 76% 7.8° 100% 24135m 6.7m/s
20:00
- 100% 3% 6% 76% -1.5° 100% 24135m 6.8m/s
21:00
- 100% 3% 5% 74% -11° 100% 24134m 5.6m/s
22:00
- 100% 0% 98% 73% -19° 100% 24134m 5.3m/s
23:00
- 100% 0% 100% 70% -25° 100% 24135m 5.7m/s
Fri, Apr 10 Sunrise 06:27 Sunset 19:53
24:00
- 100% 0% 100% 69% -30° 100% 24134m 6.2m/s
01:00
- 100% 0% 94% 69% -31° 100% 24135m 5.7m/s
02:00
- 100% 0% 100% 68% -30° 100% 24134m 4.7m/s
03:00
- 100% 0% 98% 67% -27° 100% 24134m 3.5m/s
04:00
- 100% 24% 100% 68% -21° 100% 24135m 1.8m/s
05:00
- 98% 97% 100% 69% -13° 100% 24134m 1.3m/s
06:00
- 84% 100% 100% 68% -4.7° 100% 24134m 0.56m/s
07:00
- 98% 100% 100% 71% 4.7° 100% 24135m 0.34m/s
08:00
- 64% 86% 74% 68% 14° 86% 24134m 0.15m/s
09:00
- 100% 64% 100% 64% 23° 100% 24134m 1.6m/s
10:00
- 100% 56% 100% 64% 32° 100% 24135m 2.7m/s
11:00
- 100% 64% 100% 62% 40° 100% 24135m 3m/s
12:00
- 100% 72% 100% 62% 45° 100% 24134m 4.2m/s
13:00
- 100% 44% 100% 64% 47° 100% 24134m 4.6m/s
14:00
- 100% 18% 100% 65% 46° 100% 24134m 4.8m/s
15:00
- 100% 80% 100% 68% 42° 100% 24036m 5.3m/s
16:00
- 100% 100% 100% 84% 35° 100% 12198m 4.1m/s
17:00
- 100% 100% 100% 91% 27° 100% 11738m 2.6m/s
18:00
- 100% 73% 100% 94% 17° 100% 24135m 4.4m/s
19:00
- 100% 45% 100% 93% 100% 24135m 5.2m/s
20:00
- 100% 7% 100% 93% -1.2° 100% 24135m 5.9m/s
21:00
- 100% 5% 100% 90% -10° 100% 24134m 6.5m/s
22:00
- 100% 5% 100% 88% -18° 100% 24135m 7.7m/s
23:00
- 100% 5% 100% 90% -25° 100% 24134m 7.7m/s
Sat, Apr 11 Sunrise 06:25 Sunset 19:55
24:00
- 100% 0% 64% 90% -29° 100% 24135m 7.4m/s
01:00
- 100% 4% 18% 91% -31° 100% 24134m 7.3m/s
02:00
- 100% 6% 100% 92% -30° 100% 24134m 7m/s
03:00
- 100% 100% 100% 94% -26° 100% 24134m 6.9m/s
04:00
- 100% 100% 100% 94% -21° 100% 24135m 7.2m/s
05:00
- 100% 100% 100% 95% -13° 100% 24135m 6.7m/s
06:00
- 100% 100% 100% 94% -4.3° 100% 24135m 5.7m/s
07:00
- 100% 100% 100% 89% 100% 22848m 6.7m/s
08:00
- 67% 68% 67% 79% 14° 68% 23277m 8.3m/s
09:00
- 34% 37% 33% 68% 24° 37% 23706m 9.9m/s
10:00
- 0% 5% 0% 57% 32° 5% 24135m 11m/s
11:00
- 0% 5% 2% 64% 40° 5% 23673m 12m/s
12:00
- 0% 5% 3% 70% 45° 5% 23210m 13m/s
13:00
- 0% 5% 5% 76% 48° 5% 22748m 15m/s
14:00
- 0% 5% 3% 77% 47° 5% 23210m 14m/s
15:00
- 0% 5% 2% 77% 42° 5% 23673m 14m/s
16:00
- 0% 5% 0% 77% 35° 5% 24135m 14m/s
17:00
- 0% 5% 0% 77% 27° 5% 24135m 14m/s
18:00
- 0% 5% 0% 77% 18° 5% 24135m 14m/s
19:00
- 0% 5% 0% 78% 8.2° 5% 24135m 14m/s
20:00
- 0% 5% 1% 78% -0.95° 5% 24135m 14m/s
21:00
- 0% 5% 2% 78% -10° 5% 24135m 14m/s
22:00
- 0% 5% 3% 78% -18° 5% 24135m 14m/s
23:00
- 0% 5% 4% 78% -24° 5% 24135m 14m/s
Sun, Apr 12 Sunrise 06:23 Sunset 19:57
24:00
- 0% 5% 4% 78% -29° 5% 24135m 15m/s
01:00
- 0% 5% 5% 78% -31° 5% 24135m 15m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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