Surf Forecasts:
How big are the waves at Backdoor today (18 Aug):
- Afternoon surf: Afternoon surf (18 Aug, local time) - 0.5ft (0.2m), 11s period with W swell.
- Evening surf: Evening surf (18 Aug, local time) - 0.5ft (0.2m), 10s period with W swell.
The current surf forecast for Backdoor at 12AM is: 0.2m 11s primary swell from a West-northwest direction and 0.3m 6s secondary swell from a Southwest direction (forecast issued at 07:00pm August 17). An open ocean swell of 1.4m 7s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 Aug) | - | - |
| Afternoon (18 Aug) | 0.5ft (0.2m) | 11s |
| Evening (18 Aug) | 0.5ft (0.2m) | 10s |
Table - waves today at Backdoor. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Warm (max 27°C on Thu morning, min 24°C on Mon night). Wind will be generally light. | |||||||||||||||||||
Mon 17 | Tuesday 18 | Wednesday 19 | |||||||||||||||||
5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||
Wave Height (m) Direction Period (s) | W 12 | W 10 | WNW 11 | SW 6 | WSW 6 | WNW 13 | WNW 13 | SW 17 | WNW 13 | WNW 12 | WNW 12 | WNW 12 | WNW 12 | SW 16 | NE 7 | NE 6 | NE 6 | NE 6 | NE 6 |
Wave Graph  | |||||||||||||||||||
 kJ | 11 | 8 | 11 | 6 | 4 | 17 | 17 | 47 | 34 | 30 | 28 | 28 | 28 | 41 | 44 | 40 | 31 | 30 | 45 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 7:40AM0.53m | 3:28PM0.49m | 10:00AM0.55m | ||||||||||||||||
Low Tide | 11:40PM0.17m | 12:35PM0.47m | 00:09AM0.17m | ||||||||||||||||
 |  | | | | | | | | | |  | |  | | | | | | |
 | — | — | — | — | 6:11 | — | — | — | — | — | — | — | 6:11 | — | — | — | — | — | — |
 | 7:00 | — | — | — | — | — | — | — | 7:00 | — | — | — | — | — | — | — | 6:59 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 25 | 25 | 24 | 24 | 24 | 25 | 26 | 25 | 24 | 24 | 24 | 24 | 24 | 25 | 25 | 25 | 25 | 24 |
Feels °C | 26 | 25 | 25 | 23 | 23 | 23 | 24 | 25 | 24 | 23 | 23 | 24 | 24 | 24 | 25 | 25 | 25 | 26 | 24 |
Swell 1 Height (m) Direction Period (s) | WSW 6 | SW 6 | SW 6 | E 9 | E 9 | E 9 | WNW 13 | SW 17 | WNW 13 | NE 7 | WNW 12 | WNW 12 | NNE 7 | NE 7 | NE 7 | E 8 | NE 6 | E 8 | E 8 |
| kJ | 4 | 6 | 6 | 15 | 15 | 15 | 17 | 47 | 34 | 27 | 28 | 28 | 9 | 23 | 44 | 111 | 31 | 84 | 86 |
Swell 2 Height (m) Direction Period (s) | S 14 | S 14 | WNW 11 | SW 6 | WSW 6 | WSW 6 | SSW 17 | WNW 13 | SSW 18 | WNW 12 | ENE 8 | NNE 7 | WNW 12 | WNW 12 | WNW 12 | NE 6 | SSW 16 | NE 6 | WNW 11 |
| kJ | 16 | 16 | 11 | 6 | 4 | 4 | 28 | 34 | 30 | 30 | 6 | 10 | 28 | 28 | 28 | 40 | 25 | 30 | 12 |
Swell 3 Height (m) Direction Period (s) | W 12 | W 10 | S 14 | S 14 | S 13 | WNW 13 | WSW 6 | WSW 6 | WSW 6 | SSW 18 | WSW 6 | ENE 8 | WSW 7 | SW 16 | SW 16 | SW 16 | WNW 11 | W 11 | SSW 16 |
| kJ | 11 | 8 | 16 | 15 | 14 | 17 | 4 | 4 | 4 | 31 | 4 | 6 | 5 | 41 | 41 | 67 | 25 | 10 | 25 |
Wind waves Height (m) Direction Period (s) | ENE 7 | E 7 | E 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | E 7 | ENE 7 | ENE 7 | ENE 7 | E 8 | E 8 | — | E 8 | — | NE 6 |
| kJ | 284 | 245 | 245 | 203 | 186 | 161 | 186 | 161 | 147 | 110 | 135 | 135 | 147 | 177 | 116 | — | 86 | — | 45 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 26 | 26 | 26 | 26 | 26 | 24 | 24 | 2 | 24 | 2 | 24 | 24 | 26 | 2 | 2 | 2 | 2 | 24 | 2 |
Best forecast wave conditions in Oahu | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
Header Global | |||||||||||||||||||
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