Surf Forecasts:
How big are the waves at Backdoor today (21 Aug):
- Morning surf: Morning surf (21 Aug, local time) - 3.5ft (1.1m), 11s period with NNW swell.
- Afternoon surf: Afternoon surf (21 Aug, local time) - 6.5ft (2.0m), 10s period with NNW swell.
- Evening surf: Evening surf (21 Aug, local time) - 6ft (1.8m), 10s period with NNW swell.
The current surf forecast for Backdoor at 4PM is: 2.0m 10s primary swell from a North-northwest direction and 0.1m 11s secondary swell from a West direction (forecast issued at 12:00pm August 21). An open ocean swell of 0.2m 15s is not directed at the surf break. The wind direction is predicted to be cross-shore.
| Time (WEST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 Aug) | 3.5ft (1.1m) | 11s |
| Afternoon (21 Aug) | 6.5ft (2.0m) | 10s |
| Evening (21 Aug) | 6ft (1.8m) | 10s |
Table - waves today at Backdoor. (Swell directed towards the surf break)
Short Range ForecastHeavy rain (total 52mm), heaviest during Sun morning. Warm (max 22°C on Sun afternoon, min 18°C on Fri night). Winds increasing (light winds from the WNW on Sat morning, fresh winds from the SSW by Sun night). | |||||||||||||||||||||
Fri 21 | Saturday 22 | Sunday 23 | |||||||||||||||||||
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 |  |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | NNW 11 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 9 | NNW 9 | WNW 15 | WNW 13 | WNW 12 | WNW 11 | W 11 | WNW 11 | W 10 | W 10 | W 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 286 | 876 | 794 | 692 | 615 | 537 | 386 | 455 | 394 | 312 | 248 | 203 | 428 | 1274 | 1384 | 1167 | 1011 | 599 | 520 | 546 | 614 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross | cross-on | cross-on | on | on | cross-on | cross-on | cross | cross | cross-off | cross-off | cross-off | cross | cross-off | cross-off | cross |
High Tide | 9:50AM2.03m | 10:42PM1.88m | 11:22AM2.03m | 00:11AM1.94m | 12:36PM2.16m | ||||||||||||||||
Low Tide | 4:18PM1.11m | 4:48AM1.16m | 5:56PM1.07m | 6:14AM1.07m | 7:03PM0.92m | ||||||||||||||||
 | | | |  | | | | | | | | | | |  |  |  |  | |  | |
 | 6:56 | — | — | — | — | — | 6:56 | — | — | — | — | — | — | — | 6:56 | — | — | — | — | — | — |
 | — | — | — | 8:24 | — | — | — | — | — | — | — | 8:22 | — | — | — | — | — | — | — | 8:22 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 29 | 13 | — | 1 |
Temp °C | 19 | 20 | 20 | 19 | 18 | 18 | 18 | 18 | 19 | 20 | 20 | 21 | 20 | 20 | 20 | 19 | 21 | 20 | 20 | 22 | 21 |
Feels °C | 15 | 16 | 15 | 15 | 15 | 16 | 16 | 17 | 18 | 19 | 18 | 20 | 20 | 20 | 19 | 16 | 17 | 17 | 18 | 20 | 18 |
Swell 1 Height (m) Direction Period (s) | NNW 11 | SSW 15 | SSW 15 | WNW 9 | WNW 9 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 9 | NNW 9 | NNW 9 | WNW 13 | WNW 12 | WNW 11 | W 11 | WNW 11 | W 10 | W 10 | W 9 |
| kJ | 286 | 21 | 21 | 47 | 44 | 537 | 386 | 455 | 394 | 312 | 248 | 203 | 184 | 1274 | 1384 | 1167 | 1011 | 599 | 520 | 546 | 614 |
Swell 2 Height (m) Direction Period (s) | WNW 8 | — | W 11 | SSW 14 | SSW 14 | WNW 9 | NNW 11 | WNW 9 | W 9 | W 9 | W 9 | W 9 | WNW 15 | NNW 9 | NNW 9 | N 8 | N 8 | SW 6 | N 8 | NNW 8 | NNW 8 |
| kJ | 22 | — | 2 | 20 | 18 | 59 | 100 | 42 | 38 | 39 | 39 | 38 | 428 | 113 | 77 | 68 | 49 | 56 | 33 | 21 | 20 |
Swell 3 Height (m) Direction Period (s) | SSW 15 | — | — | — | — | NNW 12 | WNW 9 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | WNW 18 | W 8 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | N 8 | SSW 13 | SSW 13 | SSW 13 |
| kJ | 21 | — | — | — | — | 29 | 42 | 20 | 20 | 20 | 20 | 61 | 23 | 20 | 19 | 18 | 18 | 33 | 17 | 17 | 17 |
Wind waves Height (m) Direction Period (s) | NNW 7 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | — | — | — | — | — | — | — | — | — | — | — | SSE 4 | SSE 5 | S 6 | SSW 6 | S 6 |
| kJ | 229 | 876 | 794 | 692 | 615 | — | — | — | — | — | — | — | — | — | — | — | 21 | 38 | 144 | 106 | 80 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 26 | 215 | 674 | 552 | 25 | 124 | 28 | 26 | 26 | 49 | 214 | 215 | 1 | 1 | 1 | 50 | 137 | 49 | 1 | 137 | 52 |
Best forecast wave conditions in Ericeira | |||||||||||||||||||||
Best forecast wave conditions in Portugal | |||||||||||||||||||||
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