The Complete Guide to Blue Hour Photography | Framehaus

Most photographers know about golden hour. Fewer make the most of blue hour — the short window before sunrise and after sunset when the sky takes on a deep, even, cerulean blue that has no equivalent at any other time of day. Blue hour is quieter and cooler than golden hour, but in many ways it is even more versatile: it works beautifully for waterscapes, cityscapes, moody forest images, and any subject where even, shadow-free light and a richly toned sky combine to produce extraordinary results. This guide tells you exactly when blue hour happens, how to shoot it, and what camera settings to use for consistently excellent blue hour photographs.

What Is Blue Hour Photography?

Blue hour (sometimes called civil twilight) is the period immediately before sunrise and immediately after sunset, when the sun is between 0 and 6 degrees below the horizon. At this point, the sun is no longer visible, but the sky is still illuminated from below by scattered sunlight. Because the light is coming indirectly through a large amount of atmosphere, the warm red and orange wavelengths are largely scattered away, leaving the cooler blue tones to dominate.

The result is a unique quality of light that is:

• Even and directionless: No harsh shadows; the entire sky becomes a diffuse light source.
• Cool in color temperature: Typically 8000–12000K — distinctly blue compared to golden hour’s warm 2000–4000K.
• Low intensity: Much dimmer than golden hour, requiring longer exposures that can blur moving water, clouds, and other elements.
• Richly tonal: The graduated transition from deep blue at the zenith to lighter blues and lingering warm tones near the horizon creates stunning tonal depth in the sky.

Blue Hour vs. Golden Hour: Key Differences

The two windows work as a daily pair: a morning session runs blue hour → golden hour; an evening session runs golden hour → blue hour. Many of the best landscape photography sessions capture both, shooting through the transition. Our golden hour photography guide covers the earlier warm-light window in detail.

When Does Blue Hour Occur?

Blue hour typically lasts about 20–40 minutes before sunrise and after sunset, though the exact window depends on your latitude and season. At high latitudes in summer, twilight can last considerably longer; near the equator, blue hour is brief and transitions quickly.

The most reliable way to know exact blue hour timing at your location is PhotoPills — it shows you civil, nautical, and astronomical twilight start and end times for any location on any date. The Photographer’s Ephemeris provides the same data in a desktop-friendly format. Never guess — the window is short and you want to be set up before the peak color arrives.

Camera Settings for Blue Hour Photography

Blue hour is significantly dimmer than golden hour, which means longer exposures. A tripod is absolutely essential — this is not negotiable. Here are the settings to start with.

Aperture: f/8

For landscape blue hour shots that require front-to-back sharpness, f/8 is the standard choice. It balances depth of field with maximum optical performance. If you are shooting a cityscape or waterscape with no particular foreground subject and want maximum light gathering, you might open to f/5.6. For full context on aperture decisions, see our aperture in photography guide.

ISO: 100–800

Start at ISO 100 for the cleanest possible image and allow your shutter speed to extend to however long it needs to be. If you want to keep shutter speeds under 30 seconds for practical or creative reasons (some cameras limit Tv mode to 30s), raise ISO to 200 or 400 and adjust accordingly. Modern cameras produce very clean images at ISO 400–800; above ISO 1600, noise becomes visible and you will need AI noise reduction in Lightroom.

Shutter Speed: 5–30 Seconds (Typical)

Blue hour shutter speeds are typically much longer than golden hour speeds. 5 to 30 seconds is the normal range for well-exposed blue hour images, depending on ISO, aperture, and the brightness of the specific scene. These long exposures have creative effects on moving elements: water becomes silky or glassy; clouds smear across the sky; any moving subject disappears (useful for removing people from a scene). For scenes requiring exposures longer than 30 seconds, switch to Bulb mode and use a remote shutter release. Our shutter speed guide covers long exposure technique in depth.

White Balance

For blue hour, set white balance to Tungsten (around 3200K) if you want to exaggerate the blue tones and create a very cool, dramatic interpretation. Set it to Daylight (5500K) for a more natural representation. Set it to Auto and let the camera decide — then refine in Lightroom from the RAW file. All three approaches are valid. The coolest, most dramatic blue hour images typically use a manually set low Kelvin value to exaggerate the blue.

Blue Hour Camera Settings Table

The Best Subjects for Blue Hour Photography

Waterscapes: Seascapes, Lakes, Rivers

Blue hour is perhaps the single best time for waterscape photography. The cool blue sky reflected in calm water doubles the depth and richness of the color. Long exposures at blue hour smooth ocean waves into misty, dreamy bands of light and make rivers and lakes look like polished glass. The even light eliminates the harsh contrast problems that plague golden hour waterscapes. For coastal blue hour shooting, time your session with low tide to maximize foreground features and rock pools.

Cityscapes

Blue hour is the classic time for cityscape photography because the blue sky and the artificial warmth of city lights create a beautiful cool-warm color contrast in a single exposure. The sky is still bright enough to provide detail and color, while city lights are bright enough to register without being blown out. Before and after blue hour, this balance is lost: either the sky is too bright (daytime) or too dark (full night) to balance with artificial light.

Moody Landscapes

A misty valley at blue hour, a lone tree on a hill against a deep blue pre-dawn sky, a mountain reflected in a perfectly still lake bathed in blue twilight — these are quintessential blue hour landscape images. The even, cool light creates a mood of quiet mystery that golden hour’s warmth does not produce. Blue hour is the master of atmosphere.

Waterfalls

Blue hour is excellent for waterfall photography. The even, cool light illuminates the surrounding foliage and rock without the contrast problems of bright sunshine. Long exposures smooth the falling water into silky ribbons. The cool color temperature suits the fresh, natural character of a waterfall scene beautifully.

Blue Hour Photography Tips

Arrive Before Blue Hour Starts

Blue hour follows immediately after sunset (or precedes sunrise). To catch it, you need to be set up and composed before it begins — which means being in place at or before golden hour ends, rather than arriving at blue hour time. Plan to be at your location, with composition tested and settings roughly dialed, before the sun sets.

Use a Tripod (and Remote Release)

With shutter speeds of 5–30+ seconds, a tripod is completely non-negotiable for blue hour photography. Even a tiny camera movement at these speeds will produce a blurry image. Use a remote shutter release or your camera’s 2-second self-timer to prevent any vibration from pressing the shutter button. Carbon fiber tripods are worth the investment for this type of shooting.

Experiment with Long Exposures on Moving Water

Blue hour’s low light levels naturally produce long exposures without any need for ND filters, which makes it a great time to experiment with silky water effects at locations where daytime ND filters would be needed. The 10–60 second exposures common in blue hour can produce extraordinary smooth-water effects that are very difficult to achieve in daylight.

Look for Artificial Light Sources

Blue hour is the ideal time to incorporate artificial light sources — lighthouse beacons, cabin windows, city lights, boat lights, illuminated buildings — because the balance between the blue sky and the warm artificial lights is at its best in this window. The cool-warm contrast adds drama and visual interest that neither pure daylight nor full darkness can provide.

Focus Carefully in Low Light

Blue hour light is dim enough that autofocus can struggle, particularly with slower lenses. Use live view with a 10x magnification on a high-contrast edge in the scene to focus manually, then lock focus and switch to manual focus mode before shooting. For extreme long exposures (30s+), use focus peaking if your camera supports it to confirm focus accuracy before committing to the exposure.

Editing Blue Hour Photos in Lightroom

Blue hour RAW files have some specific editing characteristics worth knowing:

• White balance: The blue tones in blue hour are part of the appeal, but Auto White Balance in Lightroom often tries to neutralize them. Manually set your white balance to preserve the coolness, or push it even cooler for a more dramatic interpretation.
• Noise reduction: Long blue hour exposures at ISO 400+ will show visible noise, particularly in the smooth sky areas. Lightroom’s AI Denoise tool handles this superbly — apply it as a first step before detailed tonal adjustments.
• Shadow lifting: The long exposures and diffuse light of blue hour often result in deep, even shadows. Lift the Shadows slider to reveal detail without the image looking artificially flat.
• Contrast and Clarity: Blue hour images can feel slightly flat without some contrast and clarity enhancement. Add them carefully — the goal is depth, not crunchiness.

For a complete landscape editing workflow, our Lightroom tutorial and landscape photography guide cover the full process from RAW import to finished image.