Hong Kong residents may have a fleeting view of a rare astronomical event tonight, but the chance of witnessing a “blood moon” – a total lunar eclipse – is heavily clouded by the forecast. The Hong Kong Observatory warns that thick cloud cover and potential rainfall could obscure the spectacle, which is expected to start before the moon even rises above the horizon.
The lunar eclipse is set to commence as the moon begins to enter Earth’s shadow at 6:22 PM local time on Tuesday, March 3, 2026. The total eclipse phase, when the moon appears a reddish hue due to the scattering of sunlight, will begin at 7:04 PM and last until 8:03 PM, according to the Observatory. However, scientific officer Gabriel Fan Man-hei cautioned that visibility is far from guaranteed. “Although the total lunar eclipse will start at 7.04pm and last until 8.03pm, there will be a lot of cloud cover tonight and a chance of rain,” Fan said. “So whether people can see it depends on the actual cloud cover and how the rain develops tonight.”
What is a ‘Blood Moon’?
A total lunar eclipse occurs when the Earth passes directly between the sun and the moon, casting a shadow on the lunar surface. During totality, the moon doesn’t disappear completely, but instead takes on a reddish or coppery color. This phenomenon, often called a “blood moon,” is caused by the refraction of sunlight through Earth’s atmosphere. Shorter wavelengths of light (blue and violet) are scattered away, while longer wavelengths (red and orange) are bent towards the moon, giving it its characteristic hue. The intensity of the color can vary depending on the amount of dust and clouds in Earth’s atmosphere.
Timing of the Eclipse in Hong Kong
According to the Hong Kong Observatory, the key phases of the lunar eclipse as observed from Hong Kong are as follows:
- Partial Eclipse Begins: 6:22 PM
- Total Eclipse Begins: 7:04 PM
- Maximum Eclipse: 7:34 PM
- Total Eclipse Ends: 8:03 PM
The entire event, from the start of the partial eclipse to the conclude, is expected to last until 10:25 PM. However, the early stages of the eclipse will occur before the moon rises, meaning the initial dimming may not be visible.
Temperature Drop Expected
Alongside the celestial event, Hong Kong is also experiencing a gradual temperature decrease. The Observatory forecasts temperatures will fall from 20 degrees Celsius (68 Fahrenheit) at noon on Tuesday to around 16 degrees Celsius (61 Fahrenheit) in the evening. This cooler air could potentially contribute to clearer skies, but the overall forecast remains unfavorable for optimal viewing.
Understanding Lunar Eclipses
Lunar eclipses are safe to view with the naked eye, unlike solar eclipses, which require special eye protection. They occur when the sun, Earth, and moon are aligned, with Earth in the middle. Because lunar eclipses happen when the moon is full, they are always visible from the nighttime side of Earth. The frequency of lunar eclipses varies, but on average, there are about two to four per year. The February 20, 2026, announcement from the Hong Kong Observatory highlighted the accessibility of this particular event, noting that it could be observed with the naked eye from locations with an unobstructed view to the east, weather permitting.
What to Do if Skies are Clear
If the clouds part and the rain holds off, residents with a clear eastern horizon will be able to witness the eclipse. No special equipment is needed – simply find a dark location away from bright city lights. The total eclipse phase, lasting just over an hour, will offer the most dramatic view, as the moon transforms into a reddish hue. For those hoping to capture the event, a smartphone camera or a standard camera with a tripod should suffice.
The Hong Kong Observatory will continue to monitor the weather conditions and provide updates as needed. Residents can find the latest forecasts and astronomical information on the Observatory’s website.
The next significant astronomical event visible from Hong Kong is not yet scheduled, making this “blood moon” a potentially rare opportunity for local skywatchers. The Observatory will provide further details on upcoming celestial events as they approach.
Have thoughts on the upcoming eclipse? Share your viewing plans – or your disappointment if the clouds win – in the comments below. And please share this article with anyone who might be interested in catching a glimpse of this rare event.
