Show me the best surf for:
Peaks Friday 12.06.2026 · 21:00 with the cleanest setup in Europe this week — 11-second W swell meeting WSW winds.
Long, exposed Atlantic coast — heavy beach breaks and the giants of Nazaré.
Bay of Biscay reefs and points, with Galicia and Cantabria catching the best of NW swells.
Sand-bottom barrels from Brittany to the Basque country — Europe's wave-machine.
Slate-grey Atlantic and Irish Sea swells, big winter pulses, classic cold-water lineups.
Wind swell, short period, often onshore — patient locals chasing brief windows.
High-latitude reefs that come alive when the North Atlantic delivers.
Volcanic reefs and lava points — Europe's Hawaii in T-shirt weather.
Mid-Atlantic islands — proper open-ocean energy, light crowds.
Inconsistent but real when wind-swell aligns — Liguria, Sardinia, Sicily, the Gulf of Lion.
Wave energy (kJ) measures the power of predicted waves from both size and period.
It's more reliable than height alone — a small long-period wave carries the same energy as a much larger short-period one, and will surf far better.
We sum up to three swell trains (primary + secondary + tertiary), since stacking swells create bigger waves than any one alone.
Wave height is combined significant swell height: √(H₁² + H₂² + H₃²) — organised swell only, no wind chop.
Rough energy ranges:
~100 kJ just about surfable ·
200–1000 kJ increasingly punchy ·
1000–5000+ kJ heavy / dangerous.
Formula: E ≈ 1.96 · Hs² · T² (kJ/m of crest, deep-water seawater).
Surf score (1–10) takes the energy and applies a wind cleanliness factor. Offshore winds leave it untouched. Onshore winds penalise it up to 70%, scaled by strength. The result is mapped to a smooth 1–10 curve for easy day comparison.
Pro tip: note the energy on a small but surfable day at your local — that's your personal baseline for future forecasting.