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Surf Forecasts:
Backdoor surfForecast / Ericeira / Portugal
48hr Weather and Surf, issued 6 pm Wednesday 17 Sep 2025 WEST
How big are the waves at Backdoor today?
The current surf forecast for Backdoor at 1AM is: 1.2m 10s primary swell from a Northwest direction and 0.6m 10s secondary swell from a North direction (forecast issued at 06:00pm September 17). The wind direction is predicted to be cross-offshore.
| Time (WEST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 Sep) | 4.5ft (1.4m) | 12s |
| Afternoon (18 Sep) | 4.5ft (1.4m) | 11s |
| Evening (18 Sep) | 4.5ft (1.4m) | 11s |
Table - waves today at Backdoor. (Swell directed towards the surf break)
Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | |||||||||||||||||||||
| 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 10 | 10 | 10 | 10 | 10 | 13 | 12 | 12 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 9 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 543 | 448 | 400 | 268 | 181 | 527 | 531 | 558 | 466 | 450 | 433 | 425 | 361 | 308 | 286 | 223 | 258 | 218 | 214 | 185 | 143 | 140 | 113 | 108 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross | cross- off | cross- off | cross- off | cross- off | off | cross- on | cross | cross | cross | cross- off | glass | cross- off | cross- off | cross- on | cross- on | cross- on | cross- on | glass | glass | glass | glass | cross |
High Tide / height (m) | 1:10AM 2.32 | 1:24PM 2.64 | 1:56AM 2.49 | 2:08PM 2.81 | 2:34AM 2.64 | |||||||||||||||||||
Low Tide / height (m) | 7:00PM 0.60 | 7:12AM 0.69 | 7:49PM 0.42 | 7:57AM 0.50 | 8:28PM 0.27 | 8:34AM 0.36 | ||||||||||||||||||
Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | 7:20 | - | - | - | - | - | - | - | 7:22 | - | - | - | - | - | - | - | 7:22 | - |
| Sunset | - | 7:43 | - | - | - | - | - | - | - | 7:42 | - | - | - | - | - | - | - | 7:39 | - | - | - | - | - | - |
 | |  | | |  |  |  | | | | | | | | | | | | |  | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 23 | 21 | 20 | 20 | 21 | 21 | 26 | 25 | 26 | 26 | 22 | 25 | 23 | 22 | 24 | 24 | 23 | 23 | 21 | 20 | 20 | 20 | 21 | 21 |
| Feels °C (?) | 19 | 17 | 16 | 16 | 18 | 17 | 22 | 22 | 22 | 22 | 19 | 22 | 22 | 20 | 24 | 22 | 23 | 24 | 22 | 22 | 22 | 21 | 22 | 19 |
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Recent Eyeball Surf Reports for Ericeira
The wind is still cross-on at Backdoor (moderate winds from the NNW at Sintra/Granja 13 km from Backdoor). 1.2m 10s swell from the NNW with a 1.0m 5s windswell, also from the NNW. 2 swells combining to make bigger set waves.
2 h 52 min ago
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