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Surf Forecasts:
Castles Beach surfForecast / HAW – Oahu / USA
48hr Weather and Surf, issued 7 am Tuesday 09 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
25.7° C
(Which is slightly warmer than usual)How big are the waves at Castles Beach today?
The current surf forecast for Castles Beach at 1PM is: 0.9m 8s primary swell from a East-northeast direction (forecast issued at 07:00am December 09). An open ocean swell of 1.1m 14s is not directed at the surf break. The wind direction is predicted to be cross-onshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (09 Dec) | 3.5ft (1.0m) | 8s |
| Afternoon (09 Dec) | 3ft (0.9m) | 8s |
| Evening (09 Dec) | 2.5ft (0.8m) | 8s |
Table - waves today at Castles Beach. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Tuesday 09 | Wednesday 10 | Thursday 11 | Fri 12 | |||||||||||||||||||||
| 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 | 11 PM | 2 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 118 | 118 | 96 | 96 | 77 | 75 | 58 | 58 | 58 | 55 | 55 | 57 | 57 | 57 | 57 | 55 | 41 | 42 | 42 | 42 | 42 | 90 | 67 | 30 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | on | on | cross- on | cross- on | cross | on | cross- on | cross- off | cross- off | cross- off | cross- off | glass | off | off | off | cross- off | cross- off | cross- off | cross | cross | cross | cross- on | cross- on |
High Tide / height (m) | 6:21AM 0.83 | 5:21PM 0.38 | 7:02AM 0.76 | 7:44PM 0.38 | 7:40AM 0.70 | 10:27PM 0.46 | ||||||||||||||||||
Low Tide / height (m) | 2:13PM 0.34 | 11:00PM 0.23 | 3:00PM 0.31 | 11:47PM 0.34 | 3:36PM 0.27 | 1:18AM 0.44 | ||||||||||||||||||
Tuesday 09 | Wednesday 10 | Thursday 11 | Fri 12 | |||||||||||||||||||||
| Sunrise | - | 6:56 | - | - | - | - | - | - | - | 6:56 | - | - | - | - | - | - | - | 6:58 | - | - | - | - | - | - |
| Sunset | - | - | - | - | 5:49 | - | - | - | - | - | - | - | 5:49 | - | - | - | - | - | - | - | 5:49 | - | - | - |
 |  |  |  | |  |  | | | | | | | | | | | | | | | | | | |
Rain (mm) | 1 | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 | 1 | - | - | - |
| Temp. °C | 24 | 24 | 24 | 24 | 24 | 24 | 23 | 23 | 23 | 22 | 24 | 25 | 25 | 24 | 23 | 23 | 23 | 23 | 24 | 23 | 23 | 23 | 23 | 22 |
| Feels °C (?) | 25 | 25 | 25 | 25 | 26 | 26 | 25 | 25 | 25 | 23 | 25 | 26 | 26 | 25 | 24 | 25 | 24 | 24 | 25 | 24 | 24 | 24 | 24 | 22 |
- 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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