1/5/2024 0 Comments Indonesia tidal bore![]() ![]() Often the spring and autumn tides are the biggest but generally most month’s high tides will bring a bore down the Severn through Gloucestershire. According to some sources the largest bore on the Severn was October 15th 1966, a spectacular 9.2ft (2.8m)! Although the bigger tides around the 10m mark attract more attention smaller tides with favourable conditions are equally spectacular and also rideable for the would be bore rider!Įven on the smaller tides you will see spectators and surfers heading down to the river Severn. Low air pressure is also a key factor as this allows the movement of water more freely, thus assisting the bore in its travel.Ī high tide at sharpness docks over 9m will generally produce a visible bore somewhere along its course. Less fresh water flowing in the river allows the tidal bore to travel further inland, maintaining more of its speed and power. Bores can be between 8-12mph on the river Severn. ![]() ![]() There are many factors contributing to a 'good bore' a SW wind gives a good driving force behind the bore, increasing its speed and power. As the river narrows around Minsterworth the bore has less area to spread over thus causing larger tides to have an increase in wave height. From around Fretherne the bore can be seen forming right up to Maisemore weir, around 20 miles of river where the bore can be seen, dissipating and reforming sometimes miles at a time. The front of the oncoming surge of water creates a visible wave, varying in height. The tidal range on the Severn can be as much as 15m (49ft), this combined to the 'funnel' shaped estuary causes the incoming tide to create great a bore. Dylan counts 40 turns on his wave, and has promised to keep us all updated as soon as he hears back.The river Severn has the third highest tidal range in the world, only the bay of Fundy (north America) and Ungava bay ( Hudson straits) are bigger. ![]() An update at the bottom of the video description notes that the ride was recently submitted to the Guinness Book of World Records for the title of Most Turns on a Single Wave, a title currently held by Cristóbal de Col for 34 turns on a wave at the infamous break of Chicama in Peru. “For now I have uploaded this ride in it’s entirety,” Dylan notes in the video description, “because I’m going to cut it down in the edit and it was one of the funnest and longest rides I’ve ever had, over five minutes of not one but seven wedges! So I’m posting it here for the memory books.”Īnd as it turns out, more than just his own memory books. Just as spectacular is the rapid and dramatic change in the river itself. Dylan caught it on a good day, with the wave reaching head-high at times, and shredded the heck outta it. The Tidal Bore occurs twice per day and creates a thick wave of water from the higher waters in the bay Bay of Fundy which run up the placid Peticodiac River and roll back upstream in one wave, which can vary in height from 3 cm (1 in.) to 60 cm (24 in.). The name “Seven Ghosts” comes from the so-called tidal whelps, secondary waves that follow the main tidal front, of which, surprise surprise, there are seven. And recently, Dylan rode another, decidedly spicier, tidal bore in Indonesia known localy as “Bono” and worldwide as the “Seven Ghosts,” of course the spot that was part of the Rip Curl Search more than a decade ago. In the inaugural season of the wildly popular Weird Waves, Dylan Graves went to England and surfed the Severn Bore himself. In fact, the current world record for longest wave ever surfed is held by Steve King: 9.25 miles on a tidal bore up the Severn River in Great Britain. Tidal bores may very well be one of the least-explored frontiers of surfing, perfect for weird-wave aficionado Dylan Graves to set a new world record, seemingly by accident.įormed on rivers near the coast, tidal bores occur when a flood tide hits the outgoing river water, with the tidal bore traveling up the river against the direction of the current. ![]()
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