Southend Triathlon
Shoebury Common, Southend-on-Sea, United Kingdom · July · Independent (JBR Run & Tri Club / RTC Events)
Why people love it
- Sea swim from Shoebury Common; the 2025 route was one-way and tide-assisted
- Flat seafront run: the sprint is two laps totalling 5 km (3.1 mi)
- Flat bike: 86 m (282 ft) of climbing over the 40 km (24.9 mi) standard
- Marshals and volunteers drew praise in 2025 reviews
Watch out for
- Bike roads are open: traffic lights, junctions and right turns across traffic
- Swim can be choppy, and the tide shaped the route in 2017 and 2025
- Bike in and out and the run exit confused some racers in 2025
- 2024 racers reported lost timing chips and extra admin fees
- No bike mechanical support on the course
Race
How racers feel about it, how well it is run, and how it treats a first timer. Counts for 30% of the overall score.
Toughness: Tough
- Racer satisfactionLoved3.9
RTC Events shows 4.7 out of 5 from 34 reviews and Racecheck 3.98 from 11. The 2024 Racecheck reviews say standards slipped. · Medium confidence
- OrganizationWell run3.7
2025 racers praise registration and volunteers. Recurring issues: confusing bike in and out, a weak announcer, and in 2024 lost timing chips and admin fees. · Medium confidence
- First timer friendlyDoable2.9
1.5 km (0.93 mi) mass-start sea swim and 40 km (24.9 mi) on open roads with junctions. · Low confidence
Course traits, not part of the score
- PR potentialAverage3.4
Flat bike and run and a tide-assisted swim in 2025, but traffic lights, turns and no closed roads. · Medium confidence
Swim
Wetsuit odds, water temperature, calm, and the experience of the start. Counts for 16% of the overall score.
- Wetsuit legalUsually4.0
Rule not published. A 2025 racer says wearing one was worth it. Estuary water is usually well below the 24.6 °C (76.3 °F) limit. · Low confidence
- Water temperatureAcceptable3.0
Estuary water in June and July is typically 15 to 19 °C (59 to 66 °F). This is an estimate, not from reports. · Low confidence
- Calm waterChoppy2.4
2025 racers consistently describe choppy water and a headwind. A 2019 racer had breaking waves near the shore. · Medium confidence
- Swim easeModerate2.9
Mass-start sea swim with a stony shallow exit. Little water for the first wave in 2017, and a one-way tide-assisted route in 2025. · Medium confidence
- Swim experienceFine3.1
Murky sea water per one reviewer. The 2025 route change was better, and racers called it choppy but fun. · Medium confidence
- Swim supportGood3.8
The organiser lists a large water safety team and a boat. 2025 racers felt lifeguards were watching. · Medium confidence
Bike
Road surface, closures, scenery and wind. Counts for 18% of the overall score.
- Road surfaceGood3.5
No major surface complaints. Fast country road sections. · Low confidence
- Road closuresMostly open1.8
Roads are open. Racers report heavy traffic, inattentive drivers and unmarshalled lights, though the organiser has since added a dead zone at the lights. · High confidence
- Bike sceneryPleasant3.0
Suburban Essex roads and country lanes. · Low confidence
- WindSome wind2.7
Open Thames estuary seafront. A 2025 swimmer faced a headwind. · Low confidence
Course traits, not part of the score
- Bike speedFast3.7
Flat and fast per the organiser and reviewers, but traffic lights and turns slow riders. · Medium confidence
- Bike flatnessPancake flat4.6
Only 86 m (282 ft) of climbing over the 40 km (24.9 mi) standard bike. Flat, though the sprint figure is not published. · Medium confidence
- Bike simplicityTechnical2.2
Many junctions, right turns across traffic and lights. A 2017 rider crashed at an unmarked narrowing. · High confidence
Run
Crowds, aid stations, conditions underfoot and scenery. Counts for 13% of the overall score.
- Crowd supportStrong3.6
Good atmosphere on the run, with supportive locals. · Medium confidence
- Aid stationsStandard3.4
Water is provided on the run. There is no bike aid and no bike mechanical support. · Low confidence
- Run sceneryBeautiful3.6
Seafront promenade and beach huts. · Medium confidence
- Run conditionsEasy3.9
Clear route and an accurate 5 km (3.1 mi). Some confusion over laps and the exit near the beach huts. · Medium confidence
Course traits, not part of the score
- Run flatnessFlat4.8
Flat out-and-back along the seafront. · High confidence
Conditions
Air temperature, how predictable the weather is, setting, and spectating. Counts for 13% of the overall score.
- Air temperaturePleasant4.0
Late June and July highs are usually 17 to 23 °C (63 to 73 °F). This is a regional estimate. · Low confidence
- Weather reliabilityVariable3.0
Coastal chop and headwinds in 2025. The date moves between June and July. · Low confidence
- Venue beautyLovely3.6
Beach huts and seafront at Shoebury Common. · Medium confidence
- Spectator friendlyEasy3.7
Seafront venue near the beach, with transition by the car park. · Low confidence
Course traits, not part of the score
- Low altitudeSea level5.0
Sea level. · Medium confidence
Stay and travel
Hotels, walkability, getting there, and the town around the race. Counts for 10% of the overall score.
- Hotel availabilityGood4.2
Southend seaside has plentiful hotels. · Low confidence
- Hotel valueGood3.7
No price data found. · Low confidence
- WalkabilityWalkable4.0
Race HQ at Uncle Tom's Cabin car park, with the beach and transition next to it. · Low confidence
- Travel easeEasy4.0
London Southend Airport is about 10 km (6 mi) away, and c2c trains run to Shoeburyness. · Low confidence
- LogisticsSimple3.5
One HQ, but starts at 06:30 to 07:00. One racer wanted packs posted rather than a 60-mile (97 km) round trip. · Medium confidence
- Town and foodGood3.8
Seaside town with cafes. Shoebury Common is quieter. · Low confidence
Key facts
- Location
- Shoebury Common, Southend-on-Sea, Essex, United Kingdom
- Typical month
- July
- Latest or next date
- 21 June 2026
- Organiser
- Independent (JBR Run & Tri Club / RTC Events)
- First held
- 2017
- Distances
- 1.5 km (0.9 mi) swim, 40 km (24.9 mi) bike, 10 km (6.2 mi) run
- Swim venue
- Shoebury Common beach, Thames estuary (Uncle Tom's Cabin base) (sea)
- Water temperature
- 15–19 °C (59–66 °F)
- Wetsuit
- Rule not published; some wear one
- Swim start
- mass start by distance, early morning
- Bike climbing
- 86 m (280 ft)
- Air temperature
- 13–23 °C (55–73 °F)
- Humidity
- moderate
- Altitude
- 3 m (10 ft)
- Nearest airport
- London Southend (SEN), 10 km (6 mi) away
- Where to stay
- Southend seafront, Shoeburyness
- Booking
- Distance is an approximate road estimate. Races start 06:30-07:00.
What racers and reviewers say
- RTC Events / Eventrac reviews (34 reviews)Raced 2025 · aggregator · Positive
RTC Events shows 4.7 out of 5 from 34 reviews, most from July 2025. Racers call it well organised and friendly, with strong marshals, and say it suits first-timers. The swim was one-way, tide-assisted and choppy. Repeated complaints: heavy traffic and turns across traffic on the bike, unclear bike in and out and run exit near the beach, and weak announcements.
“Choppy, challenging but enjoyable.”
- Racecheck (11 reviews)Raced 2024 · aggregator · Mixed
Racecheck shows 3.98 out of 5 from 11 reviews, 7 of them from the first edition in 2017. Early racers liked the friendly staff and run but flagged poor bike marshalling and short or tidal swims. 2024 racers say it is declining, with timing chips falling off, no splits and admin fees on top of entry.
“Flimsy timing chips fell off.”
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Sources
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