The high tide caught out two anglers while they were fishing on the end of a break water in Essex.
The coastguard received a number of 999 calls from people concerned about the pair who were swamped by big waves and at risk of being swept into the sea.
The RNLI's Walton and Frinton Lifeboat was launched just before 12.30pm on Saturday, 28 September, to rescue the men as they tried to hold on to a navigational mark.
Luckily, the lifeboat station and ramp were close to where the anglers had been cut off.
"We urge the public to consider the wind and tide before making decisions when involving the sea. This weekend the tides were large spring tides, being higher than usual coupled with the wind could have made for a very different outcome for the two individuals.
With high tides, strong winds and flood alerts in place around the East coast over the next 24 hours, the RNLI is urging people to be extra careful.