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Surf Forecasts:
Backdoor surfForecast / Ericeira / Portugal
48hr Weather and Surf, issued 12 am Tuesday 12 May 2026 WESTForecast 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
16.5° C
(Which is normal for this time of year)How big are the waves at Backdoor today?
The current surf forecast for Backdoor at 4AM is: 1.4m 11s primary swell from a North-northwest direction and 1.1m 6s secondary swell from a West-southwest direction (forecast issued at 12:00am May 12). The wind direction is predicted to be cross-onshore.
| Time (WEST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 May) | 4.5ft (1.3m) | 10s |
| Afternoon (12 May) | 3.5ft (1.1m) | 9s |
| Evening (12 May) | 3ft (0.9m) | 9s |
Table - waves today at Backdoor. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 6mm), mostly falling on Mon night. Very mild (max 16°C on Tue morning, min 13°C on Wed night). Winds increasing (calm on Wed morning, strong winds from the N by Thu afternoon). | ||||||||||||||||||||||||
Tuesday 12 | Wednesday 13 | Thursday 14 | ||||||||||||||||||||||
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 | 4 PM | 7 PM | 10 PM | |
Swell Height Map |    |    |    | |||||||||||||||||||||
NNW 11 | NNW 11 | NNW 10 | NNW 10 | NNW 9 | NNW 9 | NNW 9 | NNW 9 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 9 | NNW 9 | NNW 9 | NNW 6 | NNW 7 | NNW 7 | NNW 8 | NNW 8 | NNW 8 | |
444 | 427 | 370 | 301 | 232 | 188 | 140 | 131 | 125 | 96 | 94 | 71 | 66 | 51 | 44 | 108 | 106 | 197 | 139 | 270 | 414 | 540 | 746 | 804 | |
Wind (km/h) | ||||||||||||||||||||||||
cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-off | cross-off | cross-off | glassy | on | cross-on | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross | |
High Tide | 11:21PM2.35m | 12:02PM2.28m | 00:15AM2.53m | 12:51PM2.50m | 1:04AM2.71m | 1:36PM2.72m | ||||||||||||||||||
Low Tide | 5:46AM0.66m | 6:02PM0.75m | 6:36AM0.46m | 6:53PM0.54m | 7:21AM0.27m | 7:41PM0.33m | ||||||||||||||||||
 |  |  | |  | | |  | | | | | | | | | | | | | | | | | |
 | — | 6:28 | — | — | — | — | — | — | — | 6:26 | — | — | — | — | — | — | — | 6:26 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 8:39 | — | — | — | — | — | — | — | 8:40 | — | — | — | — | — | — | — | 8:42 | — |
— | 2 | 2 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 15 | 15 | 15 | 15 | 16 | 16 | 16 | 15 | 15 | 15 | 14 | 16 | 16 | 16 | 16 | 15 | 14 | 14 | 13 | 14 | 15 | 15 | 14 | 14 |
13 | 13 | 13 | 12 | 13 | 13 | 14 | 14 | 14 | 15 | 14 | 16 | 15 | 14 | 14 | 12 | 11 | 10 | 8 | 7 | 8 | 7 | 6 | 7 | |
Swell 1 Height (m) Direction Period (s) | NNW 11 | NNW 11 | NNW 10 | NNW 10 | NNW 9 | NNW 9 | NNW 9 | NNW 9 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 9 | NNW 9 | SW 5 | WSW 5 | WSW 5 | WSW 5 | NNW 15 | NNW 14 | NNW 14 |
 kJ | 444 | 427 | 370 | 301 | 232 | 188 | 140 | 131 | 125 | 96 | 94 | 71 | 66 | 51 | 44 | 108 | 106 | 7 | 5 | 3 | 2 | 45 | 178 | 347 |
Swell 2 Height (m) Direction Period (s) | WSW 7 | WSW 6 | WSW 6 | WSW 6 | SSW 16 | SSW 16 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 5 | SW 5 | W 5 | WSW 5 | SW 14 | SW 13 | W 11 | WNW 11 | W 11 | SW 13 | SW 13 |
| kJ | 129 | 96 | 73 | 40 | 25 | 25 | 64 | 56 | 47 | 39 | 39 | 25 | 19 | 14 | 14 | 19 | 11 | 7 | 7 | 2 | 12 | 9 | 7 | 7 |
Swell 3 Height (m) Direction Period (s) | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | — | SSW 16 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | NNW 9 | NNW 9 | SSW 14 | SSW 14 | W 12 | W 11 | SW 13 | NW 17 | SW 13 | — | — |
| kJ | 28 | 25 | 25 | 25 | 25 | — | 24 | 23 | 21 | 21 | 21 | 21 | 21 | 29 | 29 | 20 | 19 | 3 | 2 | 7 | 11 | 7 | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | S 5 | SW 6 | SW 6 | — | — | — | — | — | — | — | — | — | NW 3 | NNW 4 | NNW 9 | NNW 6 | NNW 7 | NNW 7 | NNW 8 | NNW 8 | NNW 8 |
| kJ | — | — | — | 15 | 56 | 56 | — | — | — | — | — | — | — | — | — | 2 | 13 | 197 | 139 | 270 | 414 | 540 | 746 | 804 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 1 | 49 | 49 | 49 | 49 | 49 | 12 | 1 | 0 | 0 | 0 | 0 | 955 | 215 | 604 | 493 | 239 | 168 | 178 | 567 | 980 | 980 | 554 | 509 |
Best forecast wave conditions in Ericeira | ||||||||||||||||||||||||
Best forecast wave conditions in Portugal | ||||||||||||||||||||||||
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