Milestones in order. This is history, not a weekly activity grid.
- Webb’s Channel
- Olympic swimming in the sea
- Ederle’s Channel
- Diana Nyad’s first Cuba attempts
- FINA open-water World Championships
- World Cup circuit
- Olympic 10 km
- World Aquatics rename
Darker cells mean a higher score for this topic on that metric.
LessMore
Last reviewed Sources & creditsMedia creditsMethodology
Quick answers
Which local rescue or training agency should I check first?
Use the local lens: coastguard/federation norms and the shop briefing for that bay — not a blog visibility claim.
When did the Olympics add marathon swimming?
The 10 km open-water event debuted at the 2008 Beijing Games, held at the Shunyi rowing-canoeing park.
Who first swam the English Channel?
Matthew Webb swam Dover to Calais in 1875. The Channel remains the most famous ratifying-body swim, under rules later formalised by the CSA and CLSA.
Are wetsuits allowed in races?
World Aquatics and World Triathlon set temperature bands. Below a threshold wetsuits may be required or permitted; above it they are often banned. Always read the event’s rule sheet.
What is sighting?
Lifting the eyes to pick a landmark or buoy without breaking the stroke. It is the skill that replaces the black line.
Is a pool 1,500 m enough preparation?
It is necessary and not sufficient. Currents, chop, cold and navigation only appear outdoors.
Long before lane ropes, swimming was a harbour and river skill. The modern sport begins with nineteenth-century Channel attempts and newspaper-backed endurance swims.
FINA (now World Aquatics) built a marathon circuit in the late twentieth century. The Olympic 10 km in 2008 pulled a coastal craft into the same broadcast frame as the 50-metre hall.
Timeline
- Webb’s Channel
Matthew Webb completes the first recognised English Channel swim, Dover to Calais, in under 22 hours.
- Olympic swimming in the sea
The first modern Olympics swim in the Bay of Zea, Piraeus — open water by necessity.
- Ederle’s Channel
Gertrude Ederle swims the Channel faster than the existing men’s record, a media event in the US and Europe.
- Diana Nyad’s first Cuba attempts
A long public story of Florida–Cuba swims that later succeeds in 2013, keeping marathon swimming in headlines.
- FINA open-water World Championships
Madrid hosts the first FINA open-water worlds, a step toward a formal circuit.
- World Cup circuit
FINA’s marathon World Cup gives the 25 km and 10 km a seasonal professional shape.
- Olympic 10 km
Beijing adds the marathon swim; later Games use seas (Rio, Tokyo, Paris) or rows basins.
- World Aquatics rename
The federation that writes temperature and feeding rules leaves the FINA name.
Eras
- To 1900 — Harbour skill — Military, ferry and newspaper swims. Measurement is a coastline, not a clock on a wall.
- 1900–1970 — Channel romance — Solo ratifications and national heroes; little standardisation beyond local clubs.
- 1970–2008 — Circuit building — FINA championships, professional 25 km races, and triathlon’s mass-start culture.
- 2008–now — Olympic marathon — Drafting packs, feeding pontoons and TV boats — still the same cold and current.
Milestones
- English Channel ratification — The CSA (1927) and later CLSA keep the most famous solo swim honest: no assistance, grease, and a documented landing.
- Olympic 10 km — A mass-start, drafting-legal race that looks like a bike peloton in the water.
- Temperature rules — Wetsuit bands and cancellation thresholds are written because hypothermia is a race-ending, not a style, problem.
- Feeding pontoons — Marathon swims allow coaches to hand up drink bottles — a craft borrowed from cycling.
Open-water history is a newspaper Channel crossing that grew a rulebook. The sea did not get safer; the paperwork got thicker.