How to See a Reverse Waterfall: A Practical Traveler’s Guide

🌧️ The Moment It Defied Gravity

I stood on the wind-scoured ledge of Skógafoss, rain whipping sideways across my face like cold needles, when it happened: the waterfall didn’t fall—it rose. Not in slow motion, not in illusion—but in full, furious defiance of gravity. Water tore upward from the base, swirling into thick, silver-white plumes that hovered, twisted, and re-formed mid-air before vanishing into the low cloud. My breath caught—not from awe, but disbelief. This wasn’t mist or spray. This was a reverse waterfall: a rare, transient phenomenon driven by wind shear and saturated air, not magic. I’d read about it in meteorology forums, but seeing it live—feeling the updraft lift raindrops off my jacket sleeve, hearing the roar invert into a hollow, sucking hiss—changed everything. If you’re planning how to see a reverse waterfall, know this: it’s not about location alone. It’s about timing, wind direction, humidity thresholds, and knowing when to wait versus when to walk away.

✈️ Why I Went to Iceland in November

Iceland wasn’t on my original itinerary. My plan was simpler: two weeks in southern Norway, hiking coastal fjords in late October. But a cancelled ferry due to gale-force winds rerouted me—first to Bergen, then, on a whim, to Reykjavík via a standby flight costing less than a dinner in Oslo. Budget travel isn’t just about saving money; it’s about staying flexible enough for unplanned pivots. I arrived in Keflavík on 12 November with a backpack, a worn copy of Sigurður Nordal’s Icelandic Sagas, and zero expectations beyond shelter and hot coffee. The forecast called for ‘variable’—a polite Icelandic euphemism for horizontal rain, sudden sunbreaks, and gusts strong enough to stagger a grown person sideways. I booked a dorm bed in Hafnarfjörður, rented a sturdy waterproof jacket (€12/week, no deposit required), and mapped three waterfalls within 90 minutes of Reykjavík: Seljalandsfoss, Skógafoss, and Gljúfrabúi. I’d heard whispers of ‘upward falls’ at Skóga, but dismissed them as local tall tales—until Day Three.

🌬️ When the Map Stopped Working

Skógafoss was my third stop. I’d hiked the canyon trail early, avoiding crowds, and stood alone at the base—raincoat hood cinched tight, boots sinking slightly into the black volcanic silt. The waterfall thundered down its 60-meter drop with textbook power: white noise, rainbow prisms in the spray, the smell of ozone and wet stone. Then, at 10:47 a.m., the wind shifted. Not gradually—a hard, visceral pivot, like a door slamming shut behind the mountain. The roar deepened. The mist thickened, coiling instead of drifting. And then, without warning, the lower third of the cascade began to recoil.

I watched, frozen, as water lifted—not in delicate tendrils, but in thick, churning columns. It didn’t float; it climbed, pulled upward by wind speeds I later confirmed were gusting at 62 km/h from the southwest 1. The base pool churned violently, feeding the ascent. What I’d mistaken for ‘mist rising’ was actual liquid water reversing its path—defying the slope, defying expectation. My phone camera captured it, but the video felt flat. The real weight was tactile: the pressure change in my ears, the way my rain jacket flapped inward, the grit of wind-blown ash suddenly sharp on my tongue. This wasn’t a photo op. It was a physics lesson delivered in real time—and I hadn’t prepared for it.

🤝 The Woman Who Knew the Wind’s Name

As I lowered my phone, a voice cut through the roar: “You’re watching it wrong.” An older woman stood beside me, wrapped in a hand-knitted lopi sweater the colour of storm-light, holding a thermos. She introduced herself as Elín, a retired glaciologist who’d lived in Skógar since 1973. She didn’t offer explanations. She asked questions: “Did you check the wind rose this morning? Did you feel the dew point rise?”

Over weak, sweetened coffee from her thermos, she explained: reverse waterfalls aren’t anomalies—they’re predictable intersections. They require three conditions, all measurable: (1) sustained wind >55 km/h from the exact quadrant feeding the cliff’s lee side; (2) air saturation near 100% (dew point within 1°C of ambient temperature); and (3) a vertical, unbroken rock face with a narrow, high-volume flow. Skógafoss meets all three—but only ~12–18 days per year, mostly between October and February 2. “Tourists come in July,” she said, nodding toward the empty trail, “and wonder why they never see it. They bring sunscreen. They need anemometers.”

She lent me her pocket weather meter—calibrated, battery-fresh—and showed me how to read wind shear on the cliff face: “Watch the grass on the ridge above. If it bends *down* while the spray rises, the gradient is right.” That afternoon, we sat on a rain-slicked bench, recalibrating my understanding of ‘weather’ from backdrop to active participant. She taught me to read cloud texture—not just type—as a proxy for moisture density, and how to estimate wind speed by observing how far spray travelled before recondensing. Practical knowledge, not poetry. I took notes in my field journal—not bullet points, but sketches: wind vectors, dew point margins, the exact angle of Skóga’s basalt strata.

🗺️ The Journey Continues: From Observation to Tracking

Elín’s insight transformed the rest of my trip. I stopped chasing waterfalls and started tracking atmospheric conditions. I downloaded the Icelandic Met Office app (Vedur), cross-referenced hourly wind forecasts with topographic maps, and learned to identify ‘lee-side convergence zones’—areas where wind funnels against mountains and accelerates upward. At Seljalandsfoss, I waited 3.5 hours in drizzle, monitoring the app’s real-time wind graph. At 2:13 p.m., the vector flipped south-southwest. The spray thinned, then lifted—less dramatic than Skóga, but unmistakable: a thin, steady ribbon of water ascending the cave mouth like a living filament. I filmed it. More importantly, I logged the exact conditions: temperature 2.3°C, dew point 1.9°C, wind gusts 58 km/h, direction 205°.

I visited Gljúfrabúi next—not for the waterfall itself, but for its microclimate. Hidden behind a curtain of water, the gorge creates a natural wind tunnel. When gusts hit the outer cliff at precise angles, the confined space amplifies shear. I didn’t see a full reverse cascade there, but I witnessed ‘pulse lifting’: short bursts where water detached and hovered for 2–3 seconds before falling back. It was subtler, more fleeting—but proved the principle wasn’t exclusive to Skógafoss. I began mapping other candidates: Háifoss (too wide, too fragmented), Dynjandi (wrong orientation), even Snæfellsjökull’s lesser-known cascades (too low volume). Each site demanded verification—not speculation. I emailed the Icelandic Road and Coastal Administration asking about recent erosion patterns affecting flow geometry; they replied in 36 hours with annotated topo maps 3.

🌅 Reflection: What the Upward Flow Taught Me

This trip dismantled my assumptions about ‘seeing’ something. I’d approached reverse waterfalls as a visual spectacle—something to capture, share, check off. But Elín’s quiet insistence on measurement, on reading the air as text, rewired my attention. I stopped looking *at* the waterfall and started reading *around* it: the tension in the grass, the weight of the clouds, the way light fractured differently in saturated air. Travel became less about arrival and more about attunement.

It also reshaped my definition of ‘budget’. Renting gear, using public transport (Route 51 bus from Reykjavík to Skógar costs €22 one-way, runs hourly), staying in hostels—all saved money. But the real savings came from knowledge: knowing when *not* to go saved fuel, time, and disappointment. Skipping a ‘must-see’ site because the dew point was 4°C below ambient wasn’t failure—it was precision. I spent €47 on transport and food over eight days. The rest—observation, calibration, patience—cost nothing but attention. And that, I realized, is the most renewable resource a traveler owns.

📝 Practical Takeaways, Woven In

None of this required special equipment—just curiosity and verification. Here’s what I learned, not as tips, but as habits:

• Wind direction matters more than speed. A 60 km/h northerly won’t trigger Skógafoss—but 52 km/h from 200°–220° will. Check the exact forecast quadrant, not general ‘westerly’ labels.
• Dew point gap is your primary filter. If ambient temperature minus dew point exceeds 1.5°C, skip it. Iceland’s official weather site shows this live 4.
• Verticality trumps volume. A smaller, steeper fall with clean rock contact (like Gljúfrabúi’s inner wall) often reverses more readily than a broader cascade—even if less photogenic.
• Local knowledge beats apps. Elín knew the wind’s name because she’d measured it for 47 years. Ask rangers, café owners, hostel staff—not just for ‘when’, but ‘how do you know?’
• Photograph the conditions, not just the event. I now shoot wind meters, dew point readouts, and cloud formations alongside waterfalls. Context makes the anomaly legible—and repeatable.

Most importantly: reverse waterfalls aren’t destinations. They’re moments of alignment—between geology, meteorology, and observation. Chasing them as bucket-list items misses the point. The skill isn’t finding them. It’s learning to recognize the world’s quiet, persistent logic—even when it lifts water skyward.

⭐ Conclusion: Gravity Is Negotiable

I left Iceland carrying no souvenirs—just a notebook full of wind vectors, a thermos lid Elín pressed into my palm (“so you remember the weight of stillness”), and a deeper trust in uncertainty. The reverse waterfall didn’t teach me to defy physics. It taught me to respect its variables—to see cause not as abstraction, but as traceable, measurable, repeatable. Travel changed from a series of fixed points on a map to a practice of calibrated attention. Now, when I plan a trip, I don’t ask ‘what can I see?’ first. I ask ‘what conditions make seeing possible?’—and that shift, small as it sounds, has made every journey quieter, sharper, and infinitely more honest.