Polar Moon Phases in Reykjavik — MoonSync · FastTool

Moon Phases Visible from Reykjavik

From Reykjavik at latitude 64.1°, the moon's appearance follows the same 29.53-day synodic cycle visible worldwide — all 8 phases from New Moon through Full Moon and back. However, Reykjavik's polar latitude affects the moon's maximum altitude in the sky. The moon can reach up to 54.5° altitude when crossing the meridian near summer solstice, and only -2.7° near winter solstice. This seasonal variation determines how high the moon appears above Reykjavik's horizon and affects lunar photography planning.

Reykjavik sits squarely within the path of totality for the August 12, 2026 total solar eclipse — one of only two national capitals (alongside Nuuk, Greenland) directly on the centerline. At 64.1°N, the city's extreme seasonal twilight means the eclipsed Sun will hang low in the sky at approximately 17:30 UTC, a rare opportunity to photograph a solar eclipse against Iceland's volcanic landscape under perpetual summer dusk.

Moonrise & Moonset Times at Reykjavik

The moon rises approximately 50 minutes later each day as seen from Reykjavik. This daily delay occurs because the moon orbits Earth eastward at about 1 km/s, moving roughly 13° per day against the background stars. At Reykjavik's latitude (64.1°), the moon's rise and set positions along the horizon shift seasonally — rising further north in summer and further south in winter. MoonSync calculates exact moonrise and moonset times for Reykjavik using real-time ephemeris data.

At 64.1°N, Reykjavik is the world's northernmost capital and experiences the midnight sun from late May to early August, with civil twilight lasting all night around the June solstice. This extreme latitude creates the longest summer golden hours on Earth — up to 3 hours of soft, amber light as the Sun skims the horizon without fully setting.

Moon Illumination & Reykjavik's Dark-Sky Planning

For stargazing and astrophotography in Reykjavik, moon illumination percentage is the critical number. A Full Moon (100% illuminated) washes out all but the brightest stars and makes deep-sky observation nearly impossible. The 7 days around New Moon (0-15% illumination) provide the best dark-sky window. At 64.1° latitude, combine moon phase with the Twilight Calculator to find nights when both astronomical darkness and minimal moonlight coincide — these 'astrophotographer's golden hours' occur roughly once per month at Reykjavik.

Lunar Data Accuracy for Reykjavik

MoonSync computes moon phase, illumination, moonrise/moonset times, and lunar age for Reykjavik using real-time ephemeris data. Phase illumination is accurate to ±1%. Moonrise and moonset times are calculated from Reykjavik's precise coordinates (64.1°, -21.9°) and corrected for atmospheric refraction. The Keplerian orbital model used achieves timing accuracy of approximately ±30 minutes over a synodic month. For sub-minute lunar event timing, consult the USNO Phases of the Moon data service.