Using Surf-Forecast’s Historical Surf Data To Find The Most Consistent Waves On Earth
Using our statistical data for 7000 spots dating back to 2006, we can find those waves that break the most, with the best winds.
Surf Forecasts:
Backdoor surfForecast / Ericeira / Portugal
48hr Weather and Surf, issued 11 pm Wednesday 31 Dec 2025 WETForecast update in hr min s Forecast update imminent
Backdoor surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Backdoor sea temperature is
14.5° C
(Which is 1.4°C colder than average for this time of year)How big are the waves at Backdoor today?
The current surf forecast for Backdoor at 3AM is: 0.6m 12s primary swell from a West-northwest direction and 0.4m 8s secondary swell from a West-southwest direction (forecast issued at 11:00pm December 31). An open ocean swell of 0.6m 6s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (WET) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (01 Jan) | 1.5ft (0.4m) | 15s |
| Afternoon (01 Jan) | 2ft (0.6m) | 14s |
| Evening (01 Jan) | 3ft (0.9m) | 13s |
Table - waves today at Backdoor. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Thursday 01 | Friday 02 | Saturday 03 | ||||||||||||||||||||||
| 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 12 | 12 | 12 | 12 | 15 | 14 | 14 | 13 | 13 | 10 | 12 | 11 | 11 | 10 | 14 | 14 | 11 | 13 | 12 | 12 | 12 | 11 | 11 | 11 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 152 | 150 | 111 | 79 | 72 | 153 | 136 | 222 | 255 | 306 | 157 | 2393 | 0 | 2378 | 104 | 134 | 152 | 330 | 300 | 347 | 456 | 586 | 667 | 742 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | off | off | off | off | off |
High Tide / height (m) | ||||||||||||||||||||||||
Low Tide / height (m) | ||||||||||||||||||||||||
Thursday 01 | Friday 02 | Saturday 03 | ||||||||||||||||||||||
| Sunrise | - | - | - | - | 7:56 | - | - | - | - | - | - | - | 7:56 | - | - | - | - | - | - | - | 7:56 | - | - | - |
| Sunset | - | - | - | - | - | - | 5:24 | - | - | - | - | - | - | - | 5:25 | - | - | - | - | - | - | - | 5:27 | - |
 | | |  |  | |  | | | | | | | | |  | | | | |  | | | | |
Rain (mm) | - | - | - | 1 | - | - | 1 | 1 | - | - | 1 | 5 | 3 | 3 | 5 | - | 2 | 4 | - | - | 1 | 3 | 2 | 5 |
| Temp. °C | 12 | 11 | 11 | 11 | 11 | 12 | 14 | 15 | 15 | 16 | 16 | 16 | 16 | 14 | 16 | 16 | 15 | 14 | 14 | 14 | 14 | 14 | 14 | 14 |
| Feels °C (?) | 9 | 7 | 6 | 5 | 4 | 5 | 8 | 9 | 8 | 8 | 8 | 8 | 8 | 8 | 9 | 9 | 8 | 3 | 7 | 8 | 6 | 8 | 9 | 9 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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