St. Helen's
Island Uninhabited Scilly island with historic chapel ruins
Best Time to Visit St. Helen's #
Visit in late spring through early autumn for the most reliable access.
Late spring to early autumn
May-September · 12-20°C
Calmer seas and milder weather for visiting coastal or island churches.
Winter
December-February · 5-10°C
Stormy seas make ferries less reliable; the landscape becomes stark and elemental.
Weather & Climate near St. Helen's #
Climate
Temperature & Rainfall
Temperature Range
21°
Warmest Month
1°
Coldest Month
Monthly Conditions
January
Weather
0.1
UV Index
Low
8.5h daylight
February
Weather
0.2
UV Index
Low
9.9h daylight
March
Weather
0.5
UV Index
Low
11.7h daylight
April
Weather
0.9
UV Index
Moderate
13.6h daylight
May
Weather
1.3
UV Index
High
15.2h daylight
June
Weather
1.6
UV Index
Very High
16.0h daylight
July
Weather
1.5
UV Index
Very High
15.6h daylight
August
Weather
1.3
UV Index
High
14.2h daylight
September
Weather
0.8
UV Index
Moderate
12.4h daylight
October
Weather
0.4
UV Index
Low
10.6h daylight
November
Weather
0.1
UV Index
Low
8.9h daylight
December
Weather
0.1
UV Index
Low
8.0h daylight
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