Basalt Island
Island Uninhabited volcanic island near Hong Kong, sea cliffs
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Basalt Island is a small island off the eastern New Territories of Hong Kong noted for its exposed columnar basalt rock formations and coastal cliffs. It sits within the area covered by Hong Kong’s geopark initiatives and is uninhabited.
The island’s geology formed during Cenozoic volcanic episodes that produced the basalt lava flows; later marine erosion sculpted the columns and coastal features now visible. It has no historic settlements and has been used mainly for navigation and occasional recreational visits.
Positioned off the eastern coast of Hong Kong near Sai Kung, the island lies in open coastal waters east of the New Territories and is reached by small boats from Sai Kung piers.
- Access: Accessible mainly by private boat or organized sea tours from the Sai Kung area; there are no regular ferry services.
- Geology: Part of Hong Kong's coastal volcanic landscape and included in the Hong Kong UNESCO Global Geopark network for its columnar basalt formations.
How to Get to Basalt Island #
Reachable only by private boat or charter from Sai Kung or other southeastern Hong Kong piers. Tours and local boat operators in Sai Kung can arrange sightseeing trips; landing is often restricted and depends on sea conditions.
Tips for Visiting Basalt Island #
- Be aware of strong currents in channels around the island; use a licensed boat operator.
- Basalt Island's rock formations can be slippery-sturdy footwear is recommended if landing is permitted.
- Check Hong Kong Marine Department notices-certain landing areas may be closed to protect wildlife.
Best Time to Visit Basalt Island #
Best in spring and autumn for calmer seas and better visibility; avoid typhoon season (June-September).
Weather & Climate near Basalt Island #
Subtropical climate with hot summers (peaking in July) and mild winters (coldest in January). Temperatures range from 12°C to 31°C. Heavy rainfall (2003 mm/year), wettest in August with a pronounced dry season.
January
January is the coolest month with highs of 18°C and lows of 12°C. The driest month with just 24 mm and partly cloudy skies.
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February
February is cool with highs of 18°C and lows of 13°C. Moderate rainfall (48 mm) and mostly overcast skies.
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March
March is mild with highs of 21°C and lows of 16°C. Moderate rainfall (77 mm) and mostly overcast skies.
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April
April is mild with highs of 24°C and lows of 20°C. Significant rainfall (162 mm) and mostly overcast skies.
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May
May is warm with muggy conditions (dew point 23°C). Heavy rain (300 mm) and mostly overcast skies.
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June
June is hot, feeling like 31°C with oppressive humidity. Heavy rain (333 mm) and mostly overcast skies.
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July
July is the hottest month, feeling like 34°C with oppressive humidity. Heavy rain (291 mm) and partly cloudy skies.
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August
August is hot, feeling like 33°C with oppressive humidity. The wettest month with heavy rain (343 mm) and partly cloudy skies.
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September
September is hot, feeling like 30°C with oppressive humidity. Heavy rain (245 mm) and partly cloudy skies.
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October
October is warm with highs of 27°C and lows of 22°C. Significant rainfall (116 mm) and partly cloudy skies.
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November
November is mild with highs of 24°C and lows of 18°C. Moderate rainfall (33 mm) and partly cloudy skies.
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December
December is cool with highs of 20°C and lows of 14°C. Moderate rainfall (31 mm) and partly cloudy skies.
