NORDR
Read the Break, Not Just the Buoy
NORDR models how offshore swell transforms as it hits your coast. Includes nearshore physics, tide dependency, and wind blocking. Because buoy data is only half the story.
Coverage focus: Belgium and the Netherlands with break-level calibration.
Process
From Basin to Beach
We track how energy travels, bends, and dissipates before it reaches the lineup.
Generation
Track basin-scale wind forcing and offshore energy formation.
Propagation
Model travel speed, decay, and direction shifts across the shelf.
Nearshore Transformation
Apply depth and orientation effects that reshape wave quality.
Break-Level Output
Present likely session windows with confidence and limiting factors.
Forecast Preview
Forecasts That Show Their Work
See optimal windows, limiting factors, and confidence scores—not just wave height and period. If the forecast is uncertain, you'll know what's unclear and why.
Optimal Window
88% confidenceTime
07:00 – 09:00
Conditions
High tide + offshore + 11s period
Swell
1.1m @ 11s
Wind
4kt S (offshore)
Tide
High at 08:15
Direction
SW 210°
Swell Propagation
Track Swell from Source to Shore
Offshore buoy readings don't tell you what reaches the beach. NORDR models energy loss, refraction over bathymetry, and nearshore shoaling so you know what actually arrives.
Group Velocity ETAs
Calculate arrival windows based on wave period physics. A 15s swell travels ~42 km/h.
Buoy Network Tracking
Detect energy earlier using 30+ stations and propagate it forward to your coastline.
Shallow-Bank Attenuation
Account for energy loss over shallow zones like Dogger Bank using bathymetry-aware corrections.
Narrow Arrival Windows
Surface the small window where period, direction, tide, and wind align—then explain why.
Deep Water Group Velocity
Cg = gT / (4π) ≈ 0.78 × T (m/s)Where T = wave period in seconds. A 15-second groundswell travels at ~11.7 m/s (42 km/h). We apply attenuation corrections when swells cross Dogger Bank or other shallow zones.
Tide Dependency
Tide Makes or Breaks the Session
Some breaks fire on high tide. Others need mid or low. NORDR factors tide state, sandbank exposure, and break geometry so timing calls match reality, not averages.
Outer sandbanks catch ALL incoming swell. Completely unsurfable.
Sandbanks still blocking most swell. Marginal at best.
Water depth allows swell to pass over banks. Surfable.
Generic forecast vs. reality
Generic Forecast
“1.2m @ 10s from WNW”—looks surfable on paper
PelagicLabs Surf
“1.2m @ 10s: 0% surfability until 14:30 high tide, then 78% surfability for a 3-hour window”
Regional tide dependency
Belgium (Oostende, De Panne, Knokke)
Unsurfable at low tide
Zeeland (NL)
Suboptimal but rideable
North Holland (NL)
Prime swells can overcome
The science: The Flemish Banks sit 15-30 km offshore in shallow water. At low tide, waves lose energy crossing these banks before they reach the beach. We model this using high-resolution depth maps and tide timing.
Wind Direction Matters More Than Speed
Offshore wind cleans it up. Onshore wind wrecks it. Cross-shore is complicated. NORDR factors wind direction, speed, and duration so you're not surprised when you paddle out.
Land-to-sea flow usually improves face quality when speeds stay moderate.
Angled flow can remain rideable; exposure and local shielding decide the outcome.
Sea-to-land flow tends to reduce shape quality and increase surface disorder.
Direction and Speed Interaction
Wind direction tells only part of the story. Speed determines how much that direction helps or hurts a break.
Beach-Relative Calculation
Each spot is evaluated against its own orientation and exposure profile.
Exposure and Shielding
Local geography can amplify or reduce effective wind impact on quality.
Trend-Aware Windowing
Wind trend is folded into session windows so timing reflects evolving conditions.
Private Beta
NORDR Is in Private Beta
Current coverage: Belgium and the Netherlands with break-level calibration. We're expanding north along the coast as validation completes. Request access if you surf the North Sea or Dutch coast.
Multi-Network Observation
Buoy observations from RWS, MVB, CEFAS, and DMI networks fused with model data
48-Hour Confidence Window
Forecasts with explicit uncertainty bands — not false precision
Physics-Informed Model
55-feature model combining nearshore physics with learned regional correction
Why PelagicLabs is different
Shows wave height only
Integrates wave × wind × tide × sandbank physics
"Good" or "Bad" days
Confidence-scored 2–3 hour session windows with reasoning
Same forecast for all beaches
Calibrated to each spot's orientation and characteristics
"Low tide warning" as afterthought
0% surfability rating when sandbanks block all swell
Looking for fishing intelligence? Explore GILLI for preparation-first fishing intelligence.