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Surf Forecasts:
Backdoor surfForecast / Ericeira / Portugal
48hr Weather and Surf, issued 12 pm 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 3PM is: 1.7m 11s primary swell from a North-northwest direction and 0.3m 9s secondary swell from a West-northwest direction, 1.6m 7s secondary swell from a Southwest direction (forecast issued at 12:00pm 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 10mm), heaviest on Mon night. Very mild (max 17°C on Wed morning, min 14°C on Tue night). Wind will be generally light. | ||||||||||||||||||||||||
Mon 11 | Tuesday 12 | Wednesday 13 | Thu 14 | |||||||||||||||||||||
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 | 1 AM | 4 AM | 7 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
NNW 12 | NNW 12 | NNW 11 | NNW 11 | NNW 11 | 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 7 | NNW 9 | NNW 9 | NNW 9 | NNW 8 | |
844 | 915 | 764 | 534 | 452 | 444 | 427 | 388 | 301 | 197 | 154 | 140 | 131 | 125 | 96 | 94 | 71 | 67 | 51 | 43 | 106 | 106 | 137 | 160 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | cross-on | cross-on | cross-on | cross | cross | cross | cross | 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 | |
High Tide | 11:06AM2.09m | 11:21PM2.35m | 12:02PM2.28m | 00:15AM2.53m | 12:51PM2.50m | 1:04AM2.71m | ||||||||||||||||||
Low Tide | 5:03PM0.92m | 5:46AM0.66m | 6:02PM0.75m | 6:36AM0.46m | 6:53PM0.54m | |||||||||||||||||||
 |  | |  |  |  | | | | |  | |  | | | | | | | | | | | | |
 | 6:28 | — | — | — | — | — | 6:28 | — | — | — | — | — | — | — | 6:26 | — | — | — | — | — | — | — | 6:26 | — |
 | — | — | — | 8:38 | — | — | — | — | — | — | — | 8:39 | — | — | — | — | — | — | — | 8:40 | — | — | — | 8:42 |
1 | 1 | 1 | 1 | — | 1 | 1 | 2 | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 15 | 16 | 16 | 16 | 15 | 15 | 15 | 15 | 16 | 16 | 16 | 16 | 15 | 15 | 15 | 14 | 16 | 17 | 17 | 17 | 15 | 14 | 14 | 14 |
11 | 12 | 12 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 14 | 14 | 14 | 15 | 14 | 16 | 16 | 15 | 15 | 13 | 11 | 11 | 10 | |
Swell 1 Height (m) Direction Period (s) | NNW 12 | NNW 12 | NNW 11 | NNW 11 | NNW 11 | NNW 11 | NNW 11 | NNW 10 | NNW 10 | NNW 9 | NNW 9 | SW 6 | SW 6 | SW 6 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 7 | NNW 9 | NNW 9 | NNW 9 | SW 5 |
 kJ | 844 | 915 | 764 | 534 | 452 | 444 | 427 | 388 | 301 | 197 | 154 | 66 | 68 | 58 | 96 | 94 | 71 | 67 | 51 | 43 | 106 | 106 | 137 | 7 |
Swell 2 Height (m) Direction Period (s) | SW 18 | WNW 9 | WNW 9 | WSW 7 | WSW 7 | WSW 7 | WSW 6 | WSW 6 | WSW 6 | SSW 16 | SSW 16 | NNW 9 | NNW 9 | NNW 8 | SW 6 | SW 6 | SW 6 | SW 6 | SW 5 | WSW 5 | WSW 5 | WSW 5 | WSW 5 | SW 13 |
| kJ | 13 | 17 | 17 | 215 | 163 | 129 | 104 | 67 | 40 | 25 | 25 | 140 | 131 | 125 | 47 | 39 | 31 | 19 | 18 | 19 | 16 | 11 | 11 | 7 |
Swell 3 Height (m) Direction Period (s) | — | SW 18 | SW 18 | SSW 18 | SSW 17 | 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 | SW 14 | W 11 |
| kJ | — | 12 | 12 | 30 | 29 | 28 | 25 | 25 | 25 | 25 | — | 24 | 23 | 21 | 21 | 21 | 21 | 21 | 29 | 29 | 20 | 19 | 7 | 2 |
Wind waves Height (m) Direction Period (s) | SW 8 | SW 7 | SW 7 | — | — | — | — | — | S 6 | SW 6 | SW 6 | SSW 5 | — | — | — | — | — | — | — | — | — | NNW 3 | — | NNW 8 |
| kJ | 461 | 318 | 261 | — | — | — | — | — | 15 | 66 | 75 | 22 | — | — | — | — | — | — | — | — | — | 1 | — | 160 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 49 | 423 | 423 | 49 | 22 | 25 | 1 | 1 | 49 | 49 | 49 | 12 | 1 | 0 | 0 | 0 | 0 | 56 | 674 | 45 | 26 | 81 | 29 | 131 |
Best forecast wave conditions in Ericeira | ||||||||||||||||||||||||
Best forecast wave conditions in Portugal | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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