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Surf Forecasts:
Backdoor surfForecast / Ericeira / Portugal
48hr Weather and Surf, issued 12 pm Wednesday 13 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 7PM is: 0.8m 9s primary swell from a North-northwest direction and 0.5m 5s secondary swell from a Southwest direction (forecast issued at 12:00pm May 13). The wind direction is predicted to be cross-onshore.
| Time (WEST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (13 May) | 3ft (0.9m) | 8s |
| Afternoon (13 May) | 2.5ft (0.7m) | 8s |
| Evening (13 May) | 2.5ft (0.8m) | 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 Wed morning. Very mild (max 17°C on Wed morning, min 14°C on Wed night). Winds increasing (light winds from the S on Wed morning, strong winds from the NNW by Thu night). | ||||||||||||||||||||||||
Wed 13 | Thursday 14 | Friday 15 | Sat 16 | |||||||||||||||||||||
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 8 | NNW 8 | NNW 8 | NNW 9 | NNW 9 | NNW 9 | NNW 9 | NNW 8 | NNW 7 | NNW 7 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 9 | NNW 9 | NNW 9 | NNW 8 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 9 | NNW 10 | |
71 | 66 | 51 | 94 | 108 | 106 | 137 | 185 | 225 | 355 | 526 | 708 | 970 | 1325 | 1847 | 2073 | 1648 | 1147 | 1567 | 1247 | 1222 | 1283 | 1312 | 1249 | |
Wind (km/h) | ||||||||||||||||||||||||
cross | cross-on | on | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross-on | cross | cross | cross | cross | cross | |
High Tide | 12:51PM2.50m | 1:04AM2.71m | 1:36PM2.72m | 1:52AM2.87m | 2:20PM2.90m | 2:39AM2.98m | ||||||||||||||||||
Low Tide | 6:53PM0.54m | 7:21AM0.27m | 7:41PM0.33m | 8:05AM0.13m | 8:27PM0.15m | |||||||||||||||||||
 |  | | |  | |  |  |  | | | | | | | | | | | | | | | | |
 | 6:26 | — | — | — | — | — | 6:26 | — | — | — | — | — | — | — | 6:24 | — | — | — | — | — | — | — | 6:24 | — |
 | — | — | — | 8:40 | — | — | — | — | — | — | — | 8:42 | — | — | — | — | — | — | — | 8:42 | — | — | — | 8:43 |
— | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 16 | 17 | 16 | 16 | 15 | 14 | 14 | 14 | 14 | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 15 | 16 | 16 | 15 | 14 | 14 | 14 | 14 |
15 | 15 | 14 | 14 | 13 | 12 | 11 | 9 | 8 | 8 | 7 | 6 | 6 | 6 | 6 | 6 | 7 | 9 | 9 | 7 | 7 | 7 | 7 | 7 | |
Swell 1 Height (m) Direction Period (s) | NNW 8 | NNW 8 | NNW 8 | NNW 9 | NNW 9 | NNW 9 | SW 5 | SW 5 | SW 5 | NNW 16 | NNW 15 | SW 13 | SW 13 | SW 13 | SW 13 | SW 13 | SW 13 | SW 13 | SW 12 | S 12 | S 12 | S 12 | S 12 | S 12 |
 kJ | 71 | 66 | 51 | 94 | 108 | 106 | 7 | 6 | 4 | 26 | 42 | 7 | 7 | 7 | 7 | 7 | 7 | 6 | 6 | 3 | 3 | 3 | 3 | 3 |
Swell 2 Height (m) Direction Period (s) | SW 6 | SW 6 | SW 6 | SW 5 | WSW 5 | WSW 5 | SW 14 | SW 13 | W 11 | WSW 5 | W 11 | SW 13 | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 31 | 24 | 19 | 14 | 15 | 11 | 7 | 7 | 9 | 2 | 9 | 7 | — | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | SSW 14 | SSW 14 | NNW 9 | SSW 14 | SSW 14 | SSW 14 | W 12 | W 11 | SW 13 | WNW 11 | SW 13 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 21 | 21 | 29 | 20 | 20 | 19 | 3 | 2 | 7 | 12 | 7 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | NNW 3 | NNW 9 | NNW 8 | NNW 7 | NNW 7 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 9 | NNW 9 | NNW 9 | NNW 8 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 9 | NNW 10 |
| kJ | — | — | — | — | — | 4 | 137 | 185 | 225 | 355 | 526 | 708 | 970 | 1325 | 1847 | 2073 | 1648 | 1147 | 1567 | 1247 | 1222 | 1283 | 1312 | 1249 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 1 | 137 | 960 | 45 | 29 | 29 | 29 | 131 | 554 | 216 | 980 | 554 | 549 | 549 | 549 | 294 | 695 | 768 | 786 | 605 | 504 | 407 | 381 | 230 |
Best forecast wave conditions in Ericeira | ||||||||||||||||||||||||
Best forecast wave conditions in Portugal | ||||||||||||||||||||||||
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