An RNLI crew retrieved the man from a shelf near a breakwater just after 5am on Thursday before taking him to safety.
The man’s friend was praised by the lifeboat crew after he acted quickly to throw him a lifebuoy and called emergency services.
Roger Cohen MBE, lifeboat operations manager, said: “In situations like this it is tempting to get in the water to help someone.
“The right course of action is to alert the emergency services, encourage them to stay calm and find a paramedic to help them.”
The RNLI provides a range of different safety advice for anglers and anglers including wearing a life jacket and equipping a personal radio.
Statistics from the charity suggest that 50 anglers died between 2011 and 2015, many of whom could have been saved had they been wearing life jackets.
As appetites for fishing and angling increase in the summer heat, the RNLI suggests people should call either 999 or 112 for the coastguard in a coastal emergency.
A spokesman said: “With so many people enjoying the water this summer, it’s important we all know the risks.
“The fact is that despite rising temperatures, the water is still cold.
“The effects of a cold water shock are severe. It causes you to breathe in the water, weakens your muscles and has an immediate effect on your heart.
“‘If you get into trouble in the water, swim to live. Lean back and keep your arms and legs above the water. Control your breathing, then call for help or swim to safety.”
https://www.theargus.co.uk/news/20659391.rnli-crews-rescues-man-fall-brighton-marina/?ref=rss RNLI crews rescue man after fall at Brighton Marina