The island saw its second-hottest June ever, according to Guernsey Met.
With an average daytime temperature of 17°C, last month came within 0.3 degrees of matching the record set in June 1846 where the days averaged 17.3 deg C.
Temperatures were, however, 2.2 degrees above the 30-year average.
Guernsey also saw 9 more hours of sunshine than normal and 6.8mm less rain last month.
Temperatures are building towards this coming weekend with a high of 28 deg C forecast for Sunday.
A yellow heat health alert has been issued for southern England where it will reach the low 30s.
June 2025 in Guernsey - 2nd warmest June since records began in 1843, with the second warmest June day on record, 30.4°C on the 30th. pic.twitter.com/cTBrZMJCpL
— Guernsey Met (@GuernseyMet) July 8, 2025


Temporary traffic lights removed from key St Peter Port route sooner than expected
New car for Guernsey's Meals on Wheels fleet
Major power cut switches off most of Alderney
Perfect evening for Guernsey's 2026 Air Display
The Red Arrows pull out of performing over Guernsey
Guernsey's Ladies' Pool reopens after pollution incident
Passengers at Guernsey Airport told to expect some flight disruption
Guernsey flights impacted by UK air traffic control issue