USAUnited States
Florence Chadwick
First woman to swim the Channel in both directions, on separate swims
View athlete profileBiography
Florence Chadwick was an American ocean swimmer from San Diego whose career connected local rough-water racing with international marathon swimming. Before attempting the Channel, she spent years competing off the California coast, then trained in the Persian Gulf while working for the Arabian American Oil Company. Employment helped finance an ambition that required boats, navigation and sustained preparation as well as swimming ability.
After an unsuccessful attempt in July 1950, she crossed from France to England on 8 August in 13 hours and 23 minutes, lowering the women’s record. The following September she completed the reverse route, from St. Margaret’s Bay to Sangatte. These were separate crossings: together they made her the first woman to succeed in both directions, rather than a continuous return swim.
Her later achievements ranged well beyond the Channel. On 21 September 1952 she completed the Catalina Channel in 13 hours 47 minutes 32 seconds. The next year she swam Gibraltar, the Bosporus and the Dardanelles, alongside another successful English Channel crossing. A further England-to-France success followed in October 1955. Her work as a swimming coach and her repeated attempts place those records within a longer career of preparation, teaching and persistence.
Selected Channel swim records
First Channel success
Published account checked
Elapsed swim time · 13h 23m
Duration of the complete swim
Started · Tuesday, 8 August 1950 · Clock time not confirmed
Finished · Tuesday, 8 August 1950 · Clock time not confirmed
Timing note · Both dates are explicit in the biography. No inspected source establishes clocks or their time standard.
Format · Solo · 1-way
Direction · France → England
Departure · Cap Gris-Nez, France
Arrival · Dover coast, England
How this record was checked
Hall of Fame and museum agree; CSA explicitly says this swim was not CSA-observed.
International Swimming Hall of Fame: Florence Chadwick
Checked 2026-10-31
Dover Museum: Florence Chadwick biography
Checked 2026-10-31
Channel Swimming Association: Brenda Fisher historical record
Checked 2026-10-31
Supports · Explicit statement that Chadwick’s 1950 crossing was not CSA-observed.
Limitations · A retrospective account, not an original observer report.
First woman England to France
Sources disagree
Elapsed swim time · 16h 19m
Duration of the complete swim
Started · Monday, 10 September 1951 · 22:30 · Museum photograph 2019-324 caption; clock standard unspecified
Finished · Tuesday, 11 September 1951 · 14:40 · Same caption; clock standard unspecified
Timing note · The caption’s clocks also fail to reconcile with either elapsed time if treated on one clock standard. No timezone conversion or correction is inferred.
Format · Solo · 1-way
Direction · England → France
Departure · St. Margaret’s Bay, England
Arrival · Sangatte, France
How this record was checked
CSA lists 16:19; museum caption supplies dates and clocks but states 16:22. No original observer log inspected.
Channel Swimming Association: Chadwick 1951, record 2466
Checked 2026-10-31
Supports · Recorded country, route and 1951 elapsed time.
Limitations · The 16:19 time differs from the museum’s 16:22; no original observer log inspected.
Dover Museum photograph 2019-324: Chadwick, September 1951
Checked 2026-10-31
Supports · Published departure and arrival dates, clocks and shores.
Limitations · Clock standard unstated; clocks and elapsed time are internally unreconciled.
Dover Museum: Florence Chadwick biography
Checked 2026-10-31
Third England-to-France success
Ratifying body's record checked
Recorded swim date · Wednesday, 12 October 1955 · Start or finish date not specified by the source
Elapsed swim time · 13h 55m
Duration of the complete swim
Started · Exact start date not confirmed · Clock time not confirmed
Finished · Exact finish date not confirmed · Clock time not confirmed
Timing note · The source lists a swim date without identifying departure or arrival; clocks remain unconfirmed.
Format · Solo · 1-way
Direction · England → France
How this record was checked
CSA individual record corroborates route and duration; museum supplies the swim date.
Channel Swimming Association: Chadwick 1955, record 2472
Checked 2026-10-31
Dover Museum: Florence Chadwick biography
Checked 2026-10-31
Other events & swims
Catalina Channel
Open-water swimming · Solo swim
Sunday, 21 September 1952 (event date)
Completed Catalina Island → mainland.
Elapsed time · 13h 47m 32s
Historical account checked
How this event was checked
CCSF row 10 confirms her completion. She was not the first woman: the same register lists Myrtle Huddleston in 1927. ISHOF links this swimmer to the English Channel but its erroneous first-woman Catalina claim is excluded.
CCSF: successful Catalina Channel solo swims
Checked 2026-10-31
Supports · Selected named individual rows: swim date, direction and elapsed time.
Limitations · The register date is not labelled departure or arrival; original observer paperwork was not inspected. Pre-1981 swims are retrospective entries.
ISHOF: Florence Chadwick
Checked 2026-10-31
Supports · Identity bridge from her English Channel swims to Catalina and Gibraltar.
Limitations · Its first-woman Catalina claim is incorrect and is not adopted; CCSF lists Myrtle Huddleston in 1927.
Strait of Gibraltar
Open-water swimming · Solo swim
1953 · exact day not confirmed
Completed the Strait of Gibraltar swim.
Historical account checked
How this event was checked
ISHOF’s named career record explicitly lists Gibraltar in 1953 alongside her English Channel history. No exact day, time, route direction or original observer paperwork was established.
ISHOF: Florence Chadwick
Checked 2026-10-31
Supports · Identity bridge from her English Channel swims to Catalina and Gibraltar.
Limitations · Its first-woman Catalina claim is incorrect and is not adopted; CCSF lists Myrtle Huddleston in 1927.
