Botallack Mine - Blue Hour - Cornwall
When city lights balance with the deep blue twilight sky
Currently
Real-time conditionsUpcoming Opportunities
When all conditions match, PhotoWeather marks an opportunity window.
What this forecast looks for
Plain-language explanation from the ruleThis forecast tracks the magical twilight conditions that transform Cornwall's coastal landmarks into atmospheric scenes. We combine cloud cover, visibility, and atmospheric conditions to predict optimal blue hour opportunities for lighthouse photography, harbour scenes, and coastal silhouettes.
Cornwall's lighthouses, fishing harbours, and tidal islands create compelling compositions during blue hour—when fading natural light balances perfectly with artificial illumination. The mild maritime climate means clear twilight skies are common, and the peninsula's western position provides extended blue hour periods.
What makes Cornwall special for blue-hour photography:
- St Michael's Mount - Tidal island castle lit against twilight, causeway reflections in wet sand
- Working harbours - Padstow and St Ives with fishing boats, harbour lights, and twilight reflections
- Lighthouse beams - Godrevy and other lighthouses with beams cutting through dusk
- Coastal silhouettes - Sea stacks and mine ruins profiled against colorful twilight sky
St Michael's Mount offers Cornwall's signature blue hour composition—the medieval castle-topped island illuminated against deepening twilight, with the tidal causeway creating leading lines and wet sand providing mirror reflections. St Ives harbour with its working fishing boats, gallery lights, and chapel creates a classic Cornish twilight scene. Godrevy Lighthouse—Virginia Woolf's inspiration for "To the Lighthouse"—sends its beam across darkening waters during blue hour. The clifftop ruins of Botallack tin mine become dramatic silhouettes against sunset colors, then take on ghostly quality as twilight deepens. Port Isaac and other fishing villages glow with warm cottage lights against cool twilight. The timing requires planning—arrive before sunset to set up, then capture the 20-30 minute window of perfect light balance.
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72-hour requirements breakdown
What passed or failed, hour by hourTime Europe/London | Blue Hour Any | Blue Hour Quality ≥ 65.0% | Precipitation Chance ≤ 15.0% |
|---|---|---|---|
| Fri, Apr 10 | |||
| 20:00 | ✓ | 16% | 99% |
| 21:00 | ✕ | 9.6% | 96% |
| 22:00 | ✕ | 3.9% | 99% |
| 23:00 | ✕ | 2.4% | 99% |
| Sat, Apr 11 | |||
| 24:00 | ✕ | 2.5% | 100% |
| 01:00 | ✕ | 1.2% | 100% |
| 02:00 | ✕ | 2.4% | 85% |
| 03:00 | ✕ | 1.6% | 59% |
| 04:00 | ✕ | 2.6% | 39% |
| 05:00 | ✕ | 3.8% | 47% |
| 06:00 | ✓ | 37% | 56% |
| 07:00 | ✕ | 1.6% | 64% |
| 08:00 | ✕ | 3.1% | 70% |
| 09:00 | ✕ | 1.2% | 76% |
| 10:00 | ✕ | 1.4% | 82% |
| 11:00 | ✕ | 1.6% | 88% |
| 12:00 | ✕ | 2.3% | 93% |
| 13:00 | ✕ | 3.5% | 99% |
| 14:00 | ✕ | 3.2% | 93% |
| 15:00 | ✕ | 2.8% | 88% |
| 16:00 | ✕ | 1.2% | 82% |
| 17:00 | ✕ | 3% | 88% |
| 18:00 | ✕ | 3% | 93% |
| 19:00 | ✕ | 3.2% | 99% |
| 20:00 | ✓ | 65% | 98% |
| 21:00 | ✕ | 39% | 96% |
| 22:00 | ✕ | 7.5% | 95% |
| 23:00 | ✕ | 5.3% | 96% |
| Sun, Apr 12 | |||
| 24:00 | ✕ | 6.4% | 97% |
| 01:00 | ✕ | 2.7% | 99% |
| 02:00 | ✕ | 7.7% | 84% |
| 03:00 | ✕ | 5.5% | 70% |
| 04:00 | ✕ | 3.8% | 56% |
| 05:00 | ✕ | 8.4% | 61% |
| 06:00 | ✓ | 65% | 65% |
| 07:00 | ✕ | 3.2% | 70% |
| 08:00 | ✕ | 2.8% | 60% |
| 09:00 | ✕ | 3.2% | 49% |
| 10:00 | ✕ | 2.8% | 39% |
| 11:00 | ✕ | 3.1% | 39% |
| 12:00 | ✕ | 3.6% | 39% |
| 13:00 | ✕ | 3.7% | 39% |
| 14:00 | ✕ | 3.8% | 47% |
| 15:00 | ✕ | 3.8% | 55% |
| 16:00 | ✕ | 3.3% | 64% |
| 17:00 | ✕ | 1.8% | 70% |
| 18:00 | ✕ | 1.7% | 77% |
| 19:00 | ✕ | 1.4% | 84% |
| 20:00 | ✓ | 27% | 75% |
| 21:00 | ✕ | 17% | 65% |
| 22:00 | ✕ | 4.4% | 56% |
| 23:00 | ✕ | 4.4% | 61% |
| Mon, Apr 13 | |||
| 24:00 | ✕ | 4.5% | 66% |
| 01:00 | ✕ | 4.5% | 71% |
| 02:00 | ✕ | 3.6% | 60% |
| 03:00 | ✕ | 3.6% | 49% |
| 04:00 | ✕ | 5.9% | 39% |
| 05:00 | ✓ | 72% | 42% |
| 06:00 | ✓ | 70% | 46% |
| 07:00 | ✕ | 3.5% | 49% |
| 08:00 | ✕ | 3.5% | 40% |
| 09:00 | ✕ | 3% | 31% |
| 10:00 | ✕ | 3.5% | 22% |
| 11:00 | ✕ | 3.6% | 33% |
| 12:00 | ✕ | 3.6% | 45% |
| 13:00 | ✕ | 3.6% | 56% |
| 14:00 | ✕ | 3.6% | 44% |
| 15:00 | ✕ | 3.5% | 33% |
| 16:00 | ✕ | 3.5% | 21% |
| 17:00 | ✕ | 3.4% | 26% |
| 18:00 | ✕ | 2.4% | 32% |
| 19:00 | ✕ | 2.4% | 38% |
| 20:00 | ✓ | 35% | 40% |
| 21:00 | ✕ | 63% | 43% |
| 22:00 | ✕ | 4.6% | 46% |
| 23:00 | ✕ | 4.4% | 56% |
| Tue, Apr 14 | |||
| 24:00 | ✕ | 3.4% | 66% |
| 01:00 | ✕ | 3.6% | 76% |
| 02:00 | ✕ | 2.5% | 59% |
| 03:00 | ✕ | 2.5% | 43% |
| 04:00 | ✕ | 2.1% | 26% |
| 05:00 | ✓ | 13% | 32% |
| 06:00 | ✓ | 26% | 38% |
| 07:00 | ✕ | 0.8% | 44% |
| 08:00 | ✕ | 1% | 39% |
| 09:00 | ✕ | 1.1% | 35% |
| 10:00 | ✕ | 2.1% | 30% |
| 11:00 | ✕ | 2.1% | 30% |
| 12:00 | ✕ | 2.1% | 31% |
| 13:00 | ✕ | 2.1% | 31% |
| 14:00 | ✕ | 1.6% | 28% |
| 15:00 | ✕ | 1.6% | 26% |
| 16:00 | ✕ | 1.5% | 24% |
| 17:00 | ✕ | 1.4% | 35% |
| 18:00 | ✕ | 1.4% | 45% |
What does Blue Hour Quality mean?
Inputs that drive the scoreThis 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 |
|---|---|---|---|---|---|---|---|---|---|
| Sat, Apr 11
Sunrise 06:38
Sunset 20:10 | |||||||||
| 20:00 | - | 0% | 5% | 0% | 72% | 1.2° | 5% | 24135m | 17m/s |
| 21:00 ☾ | - | 0% | 5% | 0% | 74% | -8.3° | 5% | 24134m | 16m/s |
| 22:00 ☾ | - | 0% | 14% | 1% | 77% | -17° | 14% | 23865m | 16m/s |
| 23:00 ☾ | - | 0% | 43% | 0% | 80% | -24° | 43% | 24134m | 15m/s |
| Sun, Apr 12
Sunrise 06:38
Sunset 20:10 | |||||||||
| 24:00 ☾ | - | 0% | 32% | 0% | 77% | -29° | 32% | 24135m | 14m/s |
| 01:00 ☾ | - | 0% | 95% | 1% | 80% | -31° | 95% | 18275m | 15m/s |
| 02:00 ☾ | - | 0% | 11% | 0% | 77% | -31° | 11% | 24135m | 14m/s |
| 03:00 ☾ | - | 0% | 36% | 4% | 76% | -28° | 36% | 18825m | 14m/s |
| 04:00 ☾ | - | 4% | 70% | 5% | 74% | -22° | 70% | 18059m | 14m/s |
| 05:00 ☾ | - | 5% | 16% | 5% | 73% | -15° | 16% | 24134m | 13m/s |
| 06:00 ☾ | - | 0% | 5% | 5% | 72% | -6.3° | 5% | 24135m | 12m/s |
| 07:00 | - | 0% | 5% | 1% | 70% | 3.2° | 5% | 23895m | 12m/s |
| 08:00 | - | 0% | 6% | 2% | 70% | 13° | 6% | 21183m | 11m/s |
| 09:00 | - | 0% | 5% | 2% | 71% | 22° | 5% | 22220m | 10m/s |
| 10:00 | - | 0% | 7% | 8% | 69% | 31° | 8% | 24134m | 8.6m/s |
| 11:00 | - | 0% | 5% | 14% | 64% | 39° | 14% | 24135m | 7.9m/s |
| 12:00 | - | 0% | 5% | 5% | 59% | 45° | 5% | 24135m | 7.5m/s |
| 13:00 | - | 0% | 5% | 0% | 58% | 48° | 5% | 24135m | 6.4m/s |
| 14:00 | - | 0% | 5% | 4% | 56% | 48° | 5% | 24135m | 5.7m/s |
| 15:00 | - | 0% | 5% | 5% | 56% | 44° | 5% | 24135m | 5.3m/s |
| 16:00 | - | 0% | 5% | 10% | 57% | 38° | 10% | 24135m | 5.1m/s |
| 17:00 | - | 0% | 5% | 98% | 59% | 29° | 98% | 24135m | 5.4m/s |
| 18:00 | - | 0% | 5% | 99% | 63% | 20° | 99% | 21767m | 5.9m/s |
| 19:00 | - | 0% | 57% | 100% | 65% | 11° | 100% | 23522m | 6.3m/s |
| 20:00 | - | 0% | 100% | 100% | 69% | 1.4° | 100% | 20418m | 6.1m/s |
| 21:00 ☾ | - | 0% | 100% | 100% | 67% | -8° | 100% | 24135m | 4.7m/s |
| 22:00 ☾ | - | 0% | 100% | 100% | 67% | -16° | 100% | 24102m | 4.6m/s |
| 23:00 ☾ | - | 0% | 76% | 100% | 68% | -23° | 100% | 24135m | 4.7m/s |
| Mon, Apr 13
Sunrise 06:36
Sunset 20:11 | |||||||||
| 24:00 ☾ | - | 0% | 5% | 100% | 69% | -28° | 100% | 23707m | 4.5m/s |
| 01:00 ☾ | - | 0% | 5% | 100% | 71% | -31° | 100% | 21048m | 4.9m/s |
| 02:00 ☾ | - | 0% | 5% | 100% | 70% | -30° | 100% | 12676m | 4.8m/s |
| 03:00 ☾ | - | 0% | 5% | 100% | 72% | -27° | 100% | 13635m | 5.4m/s |
| 04:00 ☾ | - | 0% | 0% | 53% | 71% | -22° | 53% | 23644m | 5.5m/s |
| 05:00 ☾ | - | 0% | 1% | 0% | 69% | -14° | 1% | 24134m | 4.8m/s |
| 06:00 ☾ | - | 0% | 4% | 1% | 69% | -5.9° | 4% | 24134m | 4.6m/s |
| 07:00 | - | 0% | 5% | 4% | 70% | 3.5° | 5% | 24135m | 4.6m/s |
| 08:00 | - | 0% | 5% | 5% | 70% | 13° | 5% | 23856m | 4.4m/s |
| 09:00 | - | 0% | 7% | 1% | 72% | 22° | 7% | 23076m | 4.9m/s |
| 10:00 | - | 0% | 5% | 0% | 72% | 31° | 5% | 24135m | 4.9m/s |
| 11:00 | - | 0% | 1% | 0% | 72% | 39° | 1% | 24134m | 5.2m/s |
| 12:00 | - | 1% | 1% | 0% | 72% | 46° | 2% | 24135m | 5.3m/s |
| 13:00 | - | 1% | 2% | 0% | 72% | 49° | 2% | 24099m | 5.6m/s |
| 14:00 | - | 1% | 1% | 0% | 72% | 48° | 1% | 24135m | 5.5m/s |
| 15:00 | - | 0% | 0% | 5% | 69% | 44° | 5% | 24135m | 5.3m/s |
| 16:00 | - | 0% | 5% | 5% | 68% | 38° | 5% | 24134m | 5.2m/s |
| 17:00 | - | 17% | 5% | 0% | 67% | 30° | 17% | 24134m | 5.1m/s |
| 18:00 | - | 100% | 5% | 100% | 66% | 20° | 100% | 24135m | 4.9m/s |
| 19:00 | - | 100% | 5% | 100% | 66% | 11° | 100% | 24135m | 4.6m/s |
| 20:00 | - | 0% | 5% | 64% | 67% | 1.6° | 64% | 24134m | 4.6m/s |
| 21:00 ☾ | - | 0% | 5% | 5% | 69% | -7.8° | 5% | 24135m | 4.8m/s |
| 22:00 ☾ | - | 0% | 79% | 6% | 71% | -16° | 79% | 24134m | 5.5m/s |
| 23:00 ☾ | - | 0% | 100% | 97% | 73% | -23° | 100% | 24135m | 6m/s |
| Tue, Apr 14
Sunrise 06:34
Sunset 20:13 | |||||||||
| 24:00 ☾ | - | 0% | 100% | 79% | 79% | -28° | 100% | 24135m | 6.4m/s |
| 01:00 ☾ | - | 53% | 100% | 5% | 83% | -30° | 100% | 24134m | 7.2m/s |
| 02:00 ☾ | - | 66% | 100% | 3% | 86% | -30° | 100% | 22081m | 8.1m/s |
| 03:00 ☾ | - | 79% | 100% | 2% | 90% | -27° | 100% | 20029m | 9.1m/s |
| 04:00 ☾ | - | 92% | 100% | 0% | 93% | -21° | 100% | 17976m | 10m/s |
| 05:00 ☾ | - | 95% | 98% | 33% | 94% | -14° | 100% | 19838m | 9.8m/s |
| 06:00 ☾ | - | 97% | 96% | 67% | 95% | -5.6° | 100% | 21700m | 9.5m/s |
| 07:00 | - | 100% | 94% | 100% | 96% | 3.8° | 100% | 23562m | 9.2m/s |
| 08:00 | - | 100% | 67% | 100% | 95% | 13° | 100% | 23753m | 7.5m/s |
| 09:00 | - | 100% | 40% | 100% | 94% | 23° | 100% | 23944m | 5.9m/s |
| 10:00 | - | 100% | 12% | 100% | 93% | 32° | 100% | 24135m | 4.2m/s |
| 11:00 | - | 100% | 9% | 100% | 93% | 40° | 100% | 24135m | 4.4m/s |
| 12:00 | - | 100% | 6% | 100% | 94% | 46° | 100% | 24135m | 4.7m/s |
| 13:00 | - | 100% | 3% | 100% | 94% | 49° | 100% | 24135m | 4.9m/s |
| 14:00 | - | 100% | 31% | 67% | 94% | 49° | 100% | 24135m | 5.3m/s |
| 15:00 | - | 100% | 58% | 33% | 94% | 45° | 100% | 24135m | 5.8m/s |
| 16:00 | - | 100% | 86% | 0% | 94% | 38° | 100% | 24135m | 6.2m/s |
| 17:00 | - | 99% | 86% | 0% | 95% | 30° | 99% | 24135m | 6.4m/s |
| 18:00 | - | 98% | 85% | 0% | 95% | 21° | 98% | 24135m | 6.6m/s |
| 19:00 | - | 98% | 85% | 0% | 96% | 11° | 98% | 24135m | 6.8m/s |
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