At 220 miles (354km) long, the River Severn is England's longest river. From the Welsh mountains, it meanders through Shropshire, Worcestershire, and Gloucestershire before entering the Bristol Channel. The Bristol Channel itself has the world's second-largest tidal range. These factors combine with its unique characteristics to facilitate the Severn Bore in the lower stretches near Gloucester, Gloucestershire.
When experiencing the tidal bore for yourself, the calm flow of the river is gradually interrupted, with small ripples moving against the flow of the river, finishing in a dramatic roaring wave coursing upstream. This attracts surfers, kayakers, canoers, and observers alike.
In 2025, I witnessed a 4-star Severn Bore for myself. Watching nature cause a wave to surge up the River Severn, as if a trick of nature, was truly a moving experience. Viewed on the banks of the Severn, close to the Severn Bore Inn at Minsterworth, this is the footage I captured on the day.
What causes the Severn Bore
The Severn Estuary has one of the largest tidal ranges in the world, so tidal bores form when the rising tide travels up the funnel-shaped Bristol Channel.
As the incoming tide from the Atlantic Ocean and up the Bristol Channel travels up the Severn estuary, the water is confined into a progressively constricting and shallowing channel, forcing the tide to surge upwards and forwards. This generates a single, often substantial, wave. The bore can reach heights of up to two meters and travel at speeds of around 10-13 miles per hour. This provides a unique spectacle and experience for adventurous surfers, SUP boarders, and canoers, who often take advantage of the surge.
The magnitude and timing of the Severn Bore are influenced by various factors, mainly the time of year, the phase and position of the moon, wind direction, and atmospheric pressure. It’s the amalgamation of these components that delineates the precise nature of each bore event, making every appearance uniquely enthralling.
🏄♂️ See the predicted Severn bore dates and times
🌊 Read about spring and neap tides
The Frequencies of the Severn Bore
The Severn Bore doesn’t adhere to a strict timetable, but luckily, its appearance is reasonably predictable. This tidal spectacle predominantly occurs around 12-13 times a year, chiefly during the spring and autumn equinoxes when the gravitational pull from the moon and the sun combine to influence Earth's large bodies of water to their highest degrees. The exact dates and times of the bore can be anticipated based on the lunar cycle, with high amplitude waves most commonly appearing a day or two after the first full or new moon following the equinoxes.
How the Severn Bore is graded
Not all Severn bores are made equal. Commonly, the predictions are graded 1-5 to signify the probability size and power, with 5 being the highest. 1-star graded bores provide a small, barely noticeable wave flowing against the river, while a 5-star provides the most dramatic experience; a roaring surge defying the flow of the Severn in the most dramatic way. 4 and 5-star bores are infrequent, with some years not seeing either.
| Grade | Characteristics | Frequency |
|---|---|---|
| ⭐ | Minor/weak, barely noticeable tidal surge | Frequent |
| ⭐⭐ | Modest, visible wave, typically 0.5m to 1m high | Frequent |
| ⭐⭐⭐ | Moderate, powerful wave 1m to 1.5m high | Less frequent |
| ⭐⭐⭐⭐ | Large, roaring wave up to 2m high | Infrequent |
| ⭐⭐⭐⭐⭐ | Rare, large roaring wave of up to 5.2m high | Very infrequent |
🌊 Find out about the largest tidal ranges in the world
Viewing the Severn Bore
Seeing the Severn Bore, particularly a 4 or 5 star bore, really is one of the most stunning feats of nature I've ever seen first-hand, and something I urge anyone to try and experience for themselves. There are many places you can see the bore yourself, so let's go through some of the best.
Minsterworth
One of the best and most popular places to watch the Severn Bore is at Minsterworth. Located on the A48, Minsterworth is conveniently just 14 minutes from the centre of Gloucester. When viewing the Severn Bore at Minsterworth, there are a couple of brilliant vantage points, where a clear view can be had.
Where to see the bore at Minsterworth
The bank adjacent to the Severn Bore Inn provides a wide and safe vantage point, on top of the flood defences. Furthermore, the Severn Bore Inn offers food on the days when a 4 or 5-star bore is predicted. The Severn Bore Inn also has excellent views of the River Severn from their beer garden, but be warned - this place gets very busy.
Aside from the Severn Bore Inn, the banks adjacent to St Peter's church also offer an excellent position from which to experience the Severn Bore for yourself. Located on a gradual sweeping bend, you get a great view both up and down the Severn.
Parking
Parking, both at the Severn Bore Inn and in and around the village itself, is extremely limited. You should arrive early to avoid disappointment, and also be considerate of locals when choosing a location to park. This is particularly true when coming for a 4 or 5-star bore. Set your sat-nav for either 'Minsterworth, Gloucestershire' or 'The Severn Bore Inn, Minsterworth' to find it.
Stonebench, Elmore
Offering a quieter, more atmospheric experience, Stonebench is located close to the village of Elmore. Located on a long, sweeping length of the River Severn, Stonebench offers great panoramas from which to see the Severn bore
Where to see the bore at Stonebench
There are various viewpoints along the Severn Way footpath, but some areas are obstructed by riverside vegetation. With larger bores, the banks are often subject to flooding, so caution should be taken when viewing the Severn Bore at Stonebench.
Parking
Parking is extremely limited, and the roads are nothing more than country lanes, so caution and consideration for locals is strongly advised. While there is a small car park at Stonebench (look for 'Stonebench Car Park' on maps), it’s extremely limited. Early arrival is highly recommended, but expect to have your vehicle blocked until crowds disperse with larger bores.
Set your sat-nav to Stonebench, Gloucestershire, or search for 'Stonebench Severn Bore viewing point'.
Over Bridge
Located just off the A40 on the outskirts of Gloucester, the historic Over Bridge is a popular and easily accessible point from which to view the Severn Bore. Be warned, while it is closed to traffic, its proximity to the city and ease of accessibility make it one of the busiest places to see the bore. Early arrival is advised to avoid disappointment.
Where to see the bore at Over Bridge
As its name suggests, Over Bridge spans the River Severn, so offers commanding views of the Severn Bore as it charges towards, then underneath it. At just a 7-minute drive from the city or a 30 - 40 minute walk, Over Bridge offers a different viewing perspective than that at Minsterworth or Stonebench.
Parking
Over Farm Market is probably the closest and easiest place to park. It offers larger parking areas, but beware, parking restrictions can and do apply when larger bores are predicted. From there, it’s a short walk to the river. For sat-nav, use GL2 8DB (Over Farm area) or search 'Over Bridge Gloucester'.
Alternatively, find a place to park in Gloucester and walk over.
Surfing the Severn Bore
Surfing the Severn Bore is a unique experience and attracts a dedicated group of surfers and enthusiasts who chase this awe-inspiring wave. The continuous ride provides a unique surf of length and duration that ocean waves simply cannot offer. Surfing records have been established on the bore, with rides lasting for several miles and extending over an hour.
Riding this tidal wave demands unique skills and an understanding of the river’s dynamics. The wave can appear as a tranquil rolling water one moment and transform into a robust, surging wave the next, requiring surfers to be adept and vigilant. Beyond merely surfing, the bore surfers must navigate obstacles like sandbanks, debris, and the riverbanks themselves, transforming each ride into a navigational challenge.
Embarking on the journey to ride the Severn Bore is not merely a surfing experience; it's a unique adventure that navigates through picturesque riverside locations. Let's explore some of those areas.
Surfing from Minsterworth
A quintessential starting point for many surfers, Minsterworth offers expansive vistas and a popular viewpoint for both spectators and surfers alike. The Severn Bore Inn, located conveniently close to the river, is traditionally a gathering point for the surfing community. Surfers often start or finish their rides here, as the bore manifests prominently in this segment of the river.
Surfing from Newnham on Severn
Newnham on Severn is another favoured spot for bore riders. The curvature of the river here can amplify the bore, making it a thrilling section to surf and to spectate. The village also brings historical charm and offers visitors a glimpse into the rich tapestry of Severn’s past. For those interested in prolonging their stay, Newnham provides quaint accommodations and a serene environment to relax post-surf.
Surfing from Stonebench, Elmore
With its tranquil and scenic landscape, Stonebench in Elmore is an ideal spot for those who wish to surf the Severn Bore. Notable for its striking natural beauty, Stonebench is located on a horseshoe bend on the Severn, adding unique surfing characteristics.
Surfing from Epney
Epney, a beloved spot among the bore surfing community, offers a harmonious blend of vibrant energy and serene landscapes. The river’s width here provides a different surfing dynamic, with the bore occasionally splitting around the river island. Spectators often gather at the local pubs, making Epney a lively hub during bore events.
Timings for the Severn Bore
| Location | Timing |
|---|---|
| Newnham | Approx 15 mins before high tide at Avonmouth |
| Minsterworth | Approx 45 mins after high tide at Avonmouth |
| Stonebench | Approx 1 hour after high tide at Avonmouth |
| Over Bridge | Approx 1 hour 20 mins after high tide at Avonmouth |
Conservation and Respect
I believe that such a beautiful phenomenon should be experienced first-hand, but it's imperative to acknowledge the necessity for conservation and respect towards the Severn Bore, and that respect should extend to the locals. Roads can become busy, with cars parked up the banks. Be mindful that you may be blocking a driveway or preventing someone from getting to work. Remember, it's a habitat for wildlife too, so avoid leaving paths or dropping litter.
To wrap this up, the Severn Bore serves as a magnificent manifestation of natural forces at play, uniting the curious and inviting adventurers to ride its lengthy wave or watch from the sidelines. So, the next time the moon aligns, perhaps you too will find yourself on the banks of the Severn, basking in the majesty of the bore. Be sure to look out for me.
Frequently Asked Questions
When is the next Severn Bore?
There are many tidal bores on the River Severn throughout the year, particularly during spring. They range from 1-star to 5-star bores. See the Severn Bore dates and times to find out more.
What causes the Severn Bore?
The Severn Bore is caused by the exceptionally large tidal range of the Bristol Channel combined with the funnel shape of the River Severn. As the incoming tide is forced into the narrowing river channel, it forms a wave that travels upstream against the river’s natural flow. The greater the tidal range, the larger and more powerful the bore.
How often does the Severn Bore happen?
The Severn Bore occurs several times each month, usually around spring tides when the tidal range is greatest. However, most bores are small (1 to 3 stars), with only a handful of larger 4 and 5-star bores occurring each year.
Where is the best place to see the Severn Bore?
The most popular viewing locations are Minsterworth, Stonebench, and Over Bridge. These spots offer clear views along sweeping river bends, allowing spectators to see the wave building as it approaches. Each location has limited parking, so arriving early is recommended during larger bore events.
Is it free to watch the Severn Bore?
Yes. Viewing the Severn Bore from public riverbanks and footpaths is free. However, parking can be limited, and some private venues may charge for access during major bore events.
Can you surf the Severn Bore?
Yes, but typically only larger 4 and 5-star bores provide consistent surfable waves. Experienced surfers may attempt strong 3-star bores, but conditions are less reliable. The River Severn has strong currents and debris hazards, so appropriate skill, safety equipment, and local knowledge are essential.
How long does the Severn Bore last?
The initial wave passes a viewing point in seconds, but the tidal surge that follows can continue rising for up to an hour or more as the tide flows upstream. The overall event is much longer than the single breaking wave often seen in photographs.
How are Severn Bore star ratings decided?
The bore is graded from 1 to 5 stars based on its predicted size and strength. A 1-star bore is small and may be barely noticeable, while a 5-star bore is the largest and most dramatic, often producing powerful wave fronts suitable for experienced surfers.
Is it safe to watch the Severn Bore?
Yes, provided sensible precautions are taken. Riverbanks can be muddy and slippery, and the River Severn has strong currents. Spectators should remain on stable ground, keep a safe distance from the water’s edge, and avoid climbing steep banks.
Does the weather affect the Severn Bore?
The bore is driven primarily by tidal forces rather than local weather. However, strong winds or river conditions can affect the shape and appearance of the wave. Heavy rainfall upstream can also influence river levels and current speed.
Is the Severn Bore the largest tidal bore in the world?
No. While it is one of the most famous tidal bores in the UK, larger tidal bores occur elsewhere in the world, including in China and Brazil. However, the Severn Bore remains one of the most accessible and regularly surfed tidal bores in Europe.
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