Temperatures were expected to hit 30°C on Friday as the Island enjoys a heatwave that has scorched other parts of Europe this week.
Ahead of the temperature increase, the RNLI has issued warnings and guidance with more people expected to take to the water to enjoy the weather.
The advice comes as RNLI figures show an increase in rescues around the Island, especially last year when Jersey enjoyed a long and hot summer.
Helier De Vuelle, RNLI Jersey’s press officer, said: ‘The advice would be to be sensible and know your own limits when going out on the water.
‘Always let someone know what time you are going to be back because if you don’t come back then they can get help.
‘Always take a mobile phone with you, and if you are on the north coast where the signal is not great, then take a VHF radio if you can.
‘Always take a lifejacket because that can save people and increase their chances of dealing with cold water shock.
‘And if you are in trouble never be too afraid to call for help.’
After today’s hot weather, temperatures are forecast to remain above 20°C into next week.
Alongside warnings to remain safe on the water, the Donna Annand Melanoma Charity has issued skin-protection guidance for Islanders.
Committee member Rosemary Le Saint said: ‘The charity obviously promotes sun safety. We live in a beautiful island and must enjoy being outside but let’s just do it safely. High-factor sun cream, applied frequently, is a must as is a hat, and sunglasses as you can get melanoma in the eyes.’
New figures have shown that in 2016, 43 launches took place from St Helier’s lifeboat station with 54 people being rescued. In 2017, 44 launches resulted in the rescue of 64 people.
That number rose again in 2018, with 56 launches leading to a total of 91 people being rescued.
From the St Catherine station, 16 people were rescued from 16 launches in 2016, while 14 launches in 2017 rescued 40 people.
The figure went up again last year, with lifeboats being launched 21 times and rescuing 42 people.
The rise is largely attributable to the better weather that the Island enjoyed last summer.
Mr De Vuelle said: ‘The rises will largely be down to the weather because last year we had a cracking summer here in Jersey.
‘That is really the way it works. When we have a good summer there are more people who go out on the water and that inevitably leads to more people getting into difficulty.
‘If more people are out things can go wrong, and that was the case last year.
‘So far this year we have had very few weekends when the weather has been really good, and the water is still quite cold.
‘Tide times also come into it and can affect numbers too. But a lot of it is down to the weather because automatically there is more people out on the water.’
