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Surf Forecasts:
Backdoor surfForecast / Ericeira / Portugal
48hr Weather and Surf, issued 6 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 10AM is: 1.3m 10s primary swell from a North-northwest direction and 1.0m 6s secondary swell from a Southwest direction (forecast issued at 06:00am May 12). An open ocean swell of 0.2m 16s is not directed at the surf break. 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 ForecastSome drizzle, heaviest during Tue morning. 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 night). | ||||||||||||||||||||||||
Tuesday 12 | Wednesday 13 | Thursday 14 | Fri 15 | |||||||||||||||||||||
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 | 1 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
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 | NNW 7 | NNW 7 | NNW 8 | NNW 8 | NNW 8 | NNW 9 | |
427 | 320 | 301 | 232 | 188 | 140 | 131 | 125 | 96 | 94 | 71 | 66 | 51 | 48 | 116 | 106 | 166 | 211 | 247 | 414 | 540 | 746 | 867 | 1423 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-off | cross-off | glassy | glassy | on | cross-on | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | |
High Tide | 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 | — | — | — | — | — | — | 6:24 |
 | — | — | — | — | — | 8:39 | — | — | — | — | — | — | — | 8:40 | — | — | — | — | — | — | — | 8:42 | — | 8:42 |
2 | 2 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 14 | 14 | 15 | 16 | 16 | 16 | 15 | 15 | 14 | 14 | 15 | 16 | 16 | 16 | 15 | 14 | 14 | 13 | 14 | 15 | 15 | 14 | 14 | 14 |
11 | 11 | 12 | 13 | 12 | 13 | 14 | 15 | 13 | 14 | 15 | 15 | 14 | 14 | 13 | 11 | 10 | 9 | 8 | 8 | 7 | 7 | 7 | 7 | |
Swell 1 Height (m) Direction Period (s) | NNW 11 | NNW 10 | NNW 10 | NNW 9 | NNW 9 | NNW 9 | SW 6 | SW 6 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 7 | NNW 9 | NNW 9 | SW 5 | WSW 5 | WSW 5 | NNW 16 | NNW 15 | SW 13 | NNW 13 | SW 13 |
 kJ | 427 | 320 | 301 | 232 | 188 | 140 | 66 | 56 | 96 | 94 | 71 | 66 | 51 | 48 | 116 | 106 | 6 | 5 | 2 | 26 | 43 | 7 | 342 | 7 |
Swell 2 Height (m) Direction Period (s) | WSW 6 | WSW 6 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | NNW 9 | NNW 8 | SW 6 | SW 6 | SW 6 | SW 6 | SW 5 | NNW 9 | SW 5 | SW 5 | SW 14 | SW 13 | W 11 | WNW 11 | W 11 | SW 13 | SW 13 | — |
| kJ | 96 | 73 | 25 | 25 | 25 | 24 | 131 | 125 | 39 | 39 | 25 | 19 | 18 | 29 | 9 | 7 | 7 | 7 | 9 | 12 | 9 | 7 | 7 | — |
Swell 3 Height (m) Direction Period (s) | SSW 16 | SSW 16 | — | SSW 16 | — | SSW 16 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | NNW 9 | SW 5 | SSW 14 | SSW 14 | W 12 | W 11 | SW 13 | SW 13 | SW 13 | — | — | — |
| kJ | 25 | 25 | — | 25 | — | 24 | 23 | 21 | 21 | 21 | 21 | 21 | 29 | 13 | 20 | 19 | 3 | 2 | 7 | 7 | 7 | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | SW 6 | SW 6 | SW 6 | SW 6 | — | — | — | — | — | — | — | — | NNW 2 | NNW 4 | NNW 9 | NNW 8 | NNW 7 | NNW 7 | NNW 8 | NNW 8 | NNW 8 | NNW 9 |
| kJ | — | — | 68 | 66 | 75 | 86 | — | — | — | — | — | — | — | — | 1 | 8 | 166 | 211 | 247 | 414 | 540 | 746 | 867 | 1423 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 49 | 49 | 49 | 49 | 49 | 22 | 1 | 0 | 0 | 0 | 0 | 215 | 960 | 967 | 29 | 40 | 131 | 131 | 554 | 980 | 980 | 549 | 509 | 407 |
Best forecast wave conditions in Ericeira | ||||||||||||||||||||||||
Best forecast wave conditions in Portugal | ||||||||||||||||||||||||
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