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Backdoor Surf Forecast
/ HAW – Oahu (122 breaks) / Hawaii (267 breaks) /
Surf Forecasts:
Backdoor surfForecast / HAW – Oahu / USA
48hr Weather and Surf, issued 1 pm Wednesday 17 Sep 2025 HST
How big are the waves at Backdoor today?
The current surf forecast for Backdoor at 6PM is: 0.5m 9s primary swell from a North direction (forecast issued at 01:00pm September 17). An open ocean swell of 0.2m 15s is not directed at the surf break, a second open ocean swell of 1.4m 6s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 Sep) | 1ft (0.3m) | 8s |
| Afternoon (17 Sep) | 1.5ft (0.4m) | 9s |
| Evening (17 Sep) | 2ft (0.6m) | 8s |
Table - waves today at Backdoor. (Swell directed towards the surf break)
Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | |||||||||||||||||||||
| 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 | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 8 | 8 | 9 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 10 | 10 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 6 | 7 | 7 | 10 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 14 | 14 | 26 | 51 | 49 | 61 | 57 | 55 | 54 | 55 | 55 | 34 | 51 | 56 | 56 | 56 | 106 | 104 | 100 | 71 | 136 | 171 | 211 | 47 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore 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 | cross- off | cross- off | cross- off | cross- off | cross- off |
High Tide / height (m) | 12:49PM 0.73 | 12:28AM 0.38 | 1:17PM 0.72 | 1:08AM 0.44 | 1:41PM 0.70 | 1:44AM 0.50 | ||||||||||||||||||
Low Tide / height (m) | 7:58PM 0.25 | 6:03AM 0.15 | 8:04PM 0.23 | 6:49AM 0.15 | 8:13PM 0.21 | 7:30AM 0.17 | ||||||||||||||||||
Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | - | 6:18 | - | - | - | - | - | - | - | 6:20 | - | - | - | - | - | - | - | 6:20 |
| Sunset | - | - | 6:32 | - | - | - | - | - | - | - | 6:31 | - | - | - | - | - | - | - | 6:30 | - | - | - | - | - |
 | | |  | | | | | | | | | | | | |  | | |  | | | |  | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 | - | 1 | - | - | - | - | - |
| Temp. °C | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 26 | 27 | 26 | 25 | 25 | 25 | 25 | 25 |
| Feels °C (?) | 24 | 24 | 24 | 24 | 24 | 23 | 24 | 23 | 25 | 25 | 25 | 24 | 25 | 25 | 25 | 25 | 26 | 27 | 26 | 24 | 24 | 24 | 25 | 24 |
- Map Icons:
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Recent Eyeball Surf Reports for HAW - Oahu
Offshore wind has become cross-off at Waikiki (light winds from the ENE at BUOY-OOUH1 5 km from Waikiki). 0.6m 9s swell from the SSE with a 0.3m 12s groundswell from the SSW and a 0.2m 13s groundswell from the WSW. 3 swells combining to make bigger set waves.
23 km away, 2 h 10 min ago
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