Using Surf-Forecast’s Historical Surf Data To Find The Most Consistent Waves On Earth
Using our statistical data for 7000 spots dating back to 2006, we can find those waves that break the most, with the best winds.
Surf Forecasts:
Castles Beach surfForecast / HAW – Oahu / USA
48hr Weather and Surf, issued 1 am Wednesday 17 Dec 2025 HSTForecast update in hr min s Forecast update imminent
Castles Beach surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Castles Beach sea temperature is
25.5° C
(Which is slightly warmer than usual)How big are the waves at Castles Beach today?
The current surf forecast for Castles Beach at 8AM is: 0.6m 7s primary swell from a East direction and 0.7m 6s secondary swell from a South-southeast direction (forecast issued at 01:00am December 17). An open ocean swell of 1.2m 13s is not directed at the surf break, a second open ocean swell of 0.6m 13s 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 Dec) | 2.5ft (0.8m) | 6s |
| Afternoon (17 Dec) | 3.5ft (1.0m) | 6s |
| Evening (17 Dec) | 2.5ft (0.7m) | 6s |
Table - waves today at Castles Beach. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Wednesday 17 | Thursday 18 | Friday 19 | ||||||||||||||||||||||
| 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 | 11 AM | 2 PM | 5 PM | 8 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 6 | 6 | 7 | 7 | 6 | 5 | 6 | 6 | 6 | 12 | 6 | 8 | 8 | 13 | 8 | 8 | 8 | 8 | 8 | 9 | 9 | 9 | 9 | 9 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 53 | 53 | 40 | 39 | 67 | 69 | 52 | 33 | 26 | 0 | 15 | 49 | 49 | 59 | 82 | 62 | 62 | 55 | 57 | 58 | 58 | 59 | 59 | 61 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | 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 | glass | cross- off | cross | cross | glass | glass |
High Tide / height (m) | 1:53AM 0.82 | 11:49AM 0.45 | 2:24AM 0.85 | 12:28PM 0.45 | 2:56AM 0.87 | 1:03PM 0.44 | ||||||||||||||||||
Low Tide / height (m) | 8:52AM 0.42 | 6:35PM 0.07 | 9:24AM 0.40 | 7:08PM 0.05 | 9:54AM 0.39 | 7:42PM 0.03 | ||||||||||||||||||
Wednesday 17 | Thursday 18 | Friday 19 | ||||||||||||||||||||||
| Sunrise | - | - | - | 7:01 | - | - | - | - | - | - | - | 7:01 | - | - | - | - | - | - | - | 7:03 | - | - | - | - |
| Sunset | - | - | - | - | - | - | 5:52 | - | - | - | - | - | - | - | 5:52 | - | - | - | - | - | - | - | 5:52 | - |
 | | |  | | | | | | | |  |  |  | |  | | |  | | | | | | |
Rain (mm) | 1 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 1 | 1 | - | - | - | - | - | - | - | - | - | - | - | - | 1 |
| Temp. °C | 25 | 25 | 24 | 24 | 25 | 26 | 25 | 24 | 24 | 23 | 23 | 23 | 25 | 26 | 25 | 24 | 24 | 24 | 23 | 23 | 25 | 26 | 26 | 24 |
| Feels °C (?) | 25 | 25 | 24 | 24 | 23 | 24 | 24 | 25 | 26 | 24 | 25 | 25 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 27 | 27 | 29 | 28 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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