People who come to Mallorca for water sports often watch the wind and forget about the sea. Mistake. The sea has its own agenda — especially the north coast — and can be hostile even with a sunny forecast. Read the sea before you launch, no meteorology degree required.
Ground swell vs wind chop
Two different things that add up. Ground swell is wave energy from a distant storm — possibly 2,000 km away — travelling across the ocean to the coast. Long period (8-15 s between crests), the kind that produces surfable waves. Wind chop is local roughness from the current wind. Short period (2-5 s), messy water.
For SUP, chop slows you down and soaks you; ground swell can knock you off.
Currents on north and south coasts
- North coast (Pollensa, Alcudia, Formentor): outflow currents at bay mouths during low tide can pull you offshore. Watch the Cap de Pinar exit.
- South coast (Es Trenc, Sa Ràpita): surface currents tied to the embat push riders west in the afternoon.
- East coast (Cala Millor): alongshore currents in levant.
If foam crests aren’t breaking parallel to the shore but at a clear angle, there’s current.
Real waves vs significant height
Forecasts give “significant wave height” — the average of the largest third. The biggest wave of a set can be twice as high. If the forecast says “Hs 1.2 m”, plan for 1.8-2.4 m peaks. Many beginners ignore this and get scared.
Apps and official sources
- AEMET maritime: official.
- Windy.com: wave layer with height, period, direction.
- Puertos del Estado: real buoys (Dragonera, Cabrera).
- Surfline / Magicseaweed: surf forecasts by spot.
Pre-launch signs
- Last foam line breaking 50 m+ from shore: there’s ground swell. Don’t go SUP flat.
- If pelicans/cormorants are all huddled in one spot, ask why.
- If local fishermen haven’t gone out, that’s worth more than any app.
- If people are surfing, the SUP day will be uncomfortable.
- Red flag at the beach? Doesn’t matter what your forecast says: stay out.
When to cancel
- Real wind exceeds forecast by more than 5 knots.
- Lightning storms anywhere in sight.
- Ground swell over 1 m on exposed coast.
- Beginners with anything less than ideal conditions.
- Your gut says something’s off.
Real call: how we decide
Normal June day: AEMET says 8 knots NE, swell 0.4 m. Windy agrees. We arrive at Llenaire: water flat, foam at 2 m from shore, fishermen on small boats. Decision: go. Plan: short route to Punta Avançada, back before 11:00 (when embat starts).
Another day: same forecast but on arrival we see whitecaps at 100 m and cormorants huddled on a rock. Decision: change plan. Drive to Es Trenc, enjoy flat water on the other coast.
Book a guided session
If your eye isn’t trained yet, go guided first. At El Niño Surf Center we’ve been reading the local sea for years. Book an instructor session or ask us if today is safe.
Related: wind guide.
Ready to hit the water? Book your paddle surf lessons in Mallorca · paddle surf rental in Mallorca with El Niño Surf Center in Port de Pollença.