Nazaré (Praia do Norte) Alert Guide

Leiria, Portugal · part of the Nazaré (Praia do Norte) spot guide

Nazaré is a forecast-only wave: there is no nearby NDBC buoy, and the lead time is the whole point. An alert set two to four days out on the open-ocean forecast is how tow and rescue crews mobilize before a giant day lands — the numbers below are open-ocean significant heights, not the amplified face.

The forecaster's checklist

1. 1.Watch for a deep North Atlantic low tracking Greenland or Iceland toward the Azores, bombing below about 960 mb with a long W–NW fetch pointed at Iberia.
2. 2.Give it lead time: long-period groundswell reaches Nazaré roughly two to four days after the storm peaks, so plan ahead rather than chasing same-day.
3. 3.Run on models and regional buoys — there is no nearby wave buoy, so forecasters use GFS-Wave and ECMWF via Windy and Surfline, cross-checked against Portugal’s IH MONICAN buoy off Nazaré.
4. 4.Judge a giant day on period and direction, not height alone — 17–20 seconds AND ~290–300° aligned with the canyon axis is what separates a record day from merely big.
5. 5.Respect the leverage: because the canyon multiplier depends so sharply on period and direction, small forecast errors swing the face height enormously — a modest-looking forecast can deliver a monster and a big one at the wrong angle can underwhelm.

Local winds & tide

Best wind: E–SE offshore grooms the faces clean (dawn is often cleanest) — from 90° to 135° (E–SE).

Tide is a minor, secondary factor for the giants — period and direction dominate. There is no meaningful tide dependence on the biggest days.

Dial it in