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Backdoor surfForecast / Ericeira / Portugal
48hr Weather and Surf, issued 12 am Monday 11 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 7AM is: 1.4m 12s primary swell from a North-northwest direction and 2.0m 8s secondary swell from a Southwest direction (forecast issued at 12:00am May 11). The wind direction is predicted to be cross-onshore.
| Time (WEST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (11 May) | 6ft (1.8m) | 12s |
| Afternoon (11 May) | 5.5ft (1.7m) | 11s |
| Evening (11 May) | 5ft (1.5m) | 11s |
Table - waves today at Backdoor. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastModerate rain (total 11mm), heaviest on Sun night. Very mild (max 17°C on Mon afternoon, min 15°C on Sun night). Winds decreasing (fresh winds from the SSW on Sun night, calm by Wed morning). | ||||||||||||||||||||||||
Monday 11 | Tuesday 12 | Wednesday 13 | ||||||||||||||||||||||
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 |    |    |    | |||||||||||||||||||||
SW 9 | SW 8 | NNW 12 | NNW 12 | NNW 12 | NNW 11 | NNW 11 | NNW 11 | NNW 11 | NNW 10 | 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 7 | NNW 9 | |
967 | 666 | 560 | 844 | 915 | 750 | 534 | 452 | 444 | 400 | 380 | 258 | 232 | 184 | 180 | 131 | 125 | 96 | 94 | 65 | 62 | 60 | 57 | 113 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | cross-on | cross-on | cross-on | cross | cross-on | cross | cross | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | glassy | glassy | glassy | glassy | on | cross-on | cross-on | cross | |
High Tide | 10:19PM2.23m | 11:06AM2.09m | 11:21PM2.35m | 12:02PM2.28m | 00:15AM2.53m | 12:51PM2.50m | ||||||||||||||||||
Low Tide | 4:49AM0.83m | 5:03PM0.92m | 5:46AM0.66m | 6:02PM0.75m | 6:36AM0.46m | 6:53PM0.54m | ||||||||||||||||||
 |  |  | | | |  |  |  | | | |  |  | | | | | | | | | | | |
 | — | 6:28 | — | — | — | — | — | — | — | 6:28 | — | — | — | — | — | — | — | 6:26 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 8:38 | — | — | — | — | — | — | — | 8:39 | — | — | — | — | — | — | — | 8:40 | — |
1 | — | 1 | 1 | 1 | 1 | 1 | — | 1 | 1 | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 15 | 15 | 15 | 16 | 16 | 17 | 16 | 15 | 15 | 15 | 15 | 16 | 16 | 16 | 16 | 15 | 15 | 15 | 15 | 16 | 16 | 16 | 16 | 15 |
10 | 11 | 11 | 12 | 12 | 13 | 13 | 13 | 13 | 12 | 13 | 14 | 13 | 13 | 15 | 15 | 15 | 15 | 15 | 17 | 15 | 14 | 13 | 12 | |
Swell 1 Height (m) Direction Period (s) | SW 9 | SW 8 | SW 8 | NNW 12 | NNW 12 | NNW 11 | NNW 11 | NNW 11 | NNW 11 | NNW 10 | 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 7 | NNW 9 |
 kJ | 967 | 666 | 515 | 844 | 915 | 750 | 534 | 452 | 444 | 400 | 380 | 258 | 232 | 184 | 180 | 131 | 125 | 96 | 94 | 65 | 62 | 60 | 57 | 113 |
Swell 2 Height (m) Direction Period (s) | NNW 11 | NNW 12 | NNW 12 | SW 18 | SW 18 | SW 18 | SSW 18 | WSW 7 | WSW 7 | WSW 6 | WSW 6 | SW 6 | SSW 16 | SSW 16 | SSW 16 | SW 6 | SW 6 | SW 6 | SW 6 | SW 5 | SW 5 | SW 5 | SW 5 | SW 5 |
| kJ | 319 | 385 | 560 | 13 | 12 | 12 | 30 | 142 | 110 | 88 | 67 | 60 | 25 | 25 | 24 | 47 | 38 | 38 | 24 | 23 | 14 | 13 | 13 | 9 |
Swell 3 Height (m) Direction Period (s) | SW 19 | W 10 | NW 10 | — | — | — | WNW 9 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | — | — | SSW 16 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | NNW 9 | SSW 14 |
| kJ | 15 | 8 | 23 | — | — | — | 8 | 29 | 28 | 25 | 25 | 25 | — | — | 24 | 23 | 21 | 21 | 21 | 21 | 21 | 20 | 29 | 20 |
Wind waves Height (m) Direction Period (s) | — | SW 8 | — | SW 8 | SW 8 | SW 7 | WSW 7 | — | — | — | — | — | SW 6 | SW 6 | SW 6 | — | — | — | — | — | — | — | — | — |
| kJ | — | 369 | — | 423 | 326 | 261 | 196 | — | — | — | — | — | 58 | 54 | 54 | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 413 | 49 | 49 | 51 | 419 | 419 | 49 | 1 | 1 | 40 | 49 | 49 | 49 | 276 | 49 | 25 | 0 | 0 | 0 | 0 | 960 | 980 | 674 | 509 |
Best forecast wave conditions in Ericeira | ||||||||||||||||||||||||
Best forecast wave conditions in Portugal | ||||||||||||||||||||||||
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