Ever seen the sea pull back so far it feels like you could walk to another country, only to come surging back as if Poseidon himself had a hand in it? That, my friend, is the magic of a super tide. These extreme high and low tides are a natural wonder, and if you love the ocean, coastal walks, or just want to avoid an unexpected soaking, it’s worth knowing all about them.
What causes a super tide?
A super tide (sometimes called a king tide) is when the sea reaches unusually high or low levels. But what’s behind this grand performance? It all comes down to the gravitational dance between the Moon, the Sun, and the Earth. When the Moon is full or new, its gravitational pull is at its strongest, creating a spring tide - a tide that’s already higher (or lower) than usual.
Now, add in the Sun’s gravity when the Earth, Moon, and Sun align perfectly, and you get an even greater pull on the ocean. This is when we experience a super tide, where high tides are exceptionally high, and low tides are strikingly low. This effect is amplified when the Moon is at its closest point to Earth (a perigee), making these tides even more extreme.
How often do super tides happen?
Super tides don’t happen every day, but they’re not exactly rare either. They occur a few times a year, usually in spring and autumn, when the Earth’s position relative to the Sun enhances tidal forces. The exact dates vary depending on your location, which is why checking local tide tables is key (more on that later).
Super tides can cause problems
Super tides can be both awe-inspiring and problematic. Here’s what happens when the sea decides to go big:
🌊 Coastal Flooding – If a super tide coincides with a storm or strong winds, the result can be dramatic flooding in low-lying areas. Cities like Venice, Miami, and coastal towns across the world are no strangers to this.
⛵ Navigation Challenges – Boat owners and harbour masters have to pay extra attention, as extreme low tides can leave boats stranded, while extreme highs can make docking tricky.
🐚 Beachcombing Bonanza – Low super tides expose parts of the seabed that are usually hidden, revealing shipwrecks, rock pools, and marine life that aren’t normally visible.
🏄 Super Surfing? – While not directly causing bigger waves, super tides can affect where and when waves break, which is something surfers keep an eye on.
Stay safe - Always check the tide times!
Super tides are a spectacular sight, but they come with risks. If you’re planning a beach walk, a boat trip, or even just a day by the coast, always check the tide charts. A seemingly dry path can disappear under fast-rising water in minutes. Many coastal rescue teams are called out due to people getting caught out by a rapidly incoming tide.
So, whether you’re a seasoned sailor, a passionate photographer, or just someone who enjoys the seaside, keeping an eye on the tide schedule is the best way to stay safe and enjoy the ocean’s rhythms responsibly!
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