Flat Holm
Island Small Bristol Channel island with lighthouse and wildlife
Small island in the Bristol Channel with a lighthouse and military fortifications; visited for seabird colonies, coastal walks, and day trips from the mainland.
How to Get to Flat Holm #
Day trips to Flat Holm depart from Cardiff and Barry when weather permits; private boat charters are also possible. Landings are arranged through island organisations-check the Flat Holm Project website for schedules and booking information.
Tips for Visiting Flat Holm #
- Book in advance for seasonal boat or helicopter trips from Cardiff or Barry; landing permissions are strictly managed.
- Bring layered clothing-exposure to sea spray and tidal wind is constant.
- Visit the lighthouse viewpoint at low tide for the best chance of seeing grey seals hauled out on the rocks.
Best Time to Visit Flat Holm #
Best visited May-September when boat trips and volunteer-run days are most frequent.
Weather & Climate near Flat Holm #
Temperate climate with mild summers (peaking in August) and cold winters (coldest in February). Temperatures range from 4°C to 20°C. Abundant rainfall (1047 mm/year), wettest in November.
January
January is cold with highs of 9°C and lows of 4°C. Significant rainfall (105 mm) and mostly overcast skies.
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February
February is the coolest month with highs of 8°C and lows of 4°C. Moderate rainfall (79 mm) and mostly overcast skies.
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March
March is cold with highs of 9°C and lows of 4°C. Regular rainfall (89 mm) and mostly overcast skies.
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April
April is cold with highs of 11°C and lows of 6°C. Moderate rainfall (68 mm) and mostly overcast skies.
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May
May is cool with highs of 15°C and lows of 8°C. Moderate rainfall (69 mm) and mostly overcast skies.
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June
June is cool with highs of 18°C and lows of 11°C. Moderate rainfall (69 mm) and mostly overcast skies.
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July
July is cool with highs of 20°C and lows of 14°C. Moderate rainfall (62 mm) and mostly overcast skies.
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August
August is cool with highs of 20°C and lows of 14°C. Regular rainfall (87 mm) and mostly overcast skies.
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September
September is cool with highs of 18°C and lows of 12°C. Regular rainfall (99 mm) and mostly overcast skies.
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October
October is cool with highs of 15°C and lows of 10°C. Significant rainfall (105 mm) and mostly overcast skies.
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November
November is cold with highs of 12°C and lows of 7°C. The wettest month with heavy rain (111 mm) and mostly overcast skies.
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December
December is cold with highs of 10°C and lows of 6°C. Significant rainfall (104 mm) and mostly overcast skies.
