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Castles Beach Surf Forecast
/ HAW – Oahu (122 breaks) / Hawaii (267 breaks) /
Castles Beach surfForecast / HAW – Oahu / USA
12 Day Weather and Surf, issued 1 pm Wednesday 16 Apr 2025 HST
Best Forecast Surf Conditions for Castles Beach this week:
The surf forecast for Castles Beach over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Apr 17) at 2AM. The primary swell is predicted to be 1.1m and 8s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Castles Beach in the next 12 days are 1.6m 8s and forecast to arrive on Monday (Apr 21) at 5AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 13s period and expected on Friday (Apr 18) at 2AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Thu 17th Apr) | 3.5ft (1.1m) 8s |
| Best Surf | 2AM (Thu 17th Apr) | 3.5ft (1.1m) 8s |
| Most Powerful | 5AM (Mon 21st Apr) | 5ft (1.6m) 8s |
Table - best surf conditions forecast for Castles Beach over the next 12 days.
Wed 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | Wednesday 23 | Thursday 24 | Friday 25 | Saturday 26 | Sunday 27 | Mon 28 | ||||||||||||||||||||||||
| PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |
Rating (10 max) | ||||||||||||||||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  |  |  |  |  |  | |||||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||||||||||||||
| Period(s) (?) | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | 7 | 7 | 8 | 8 | 8 | 8 | 7 | 8 | 8 | 16 | 8 | 8 | 8 | 8 | 9 | 11 | 10 | 10 | 9 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 |
Wave (?)Graph  | ||||||||||||||||||||||||||||||||||||
| Energy (?) | 144 | 165 | 172 | 142 | 118 | 115 | 173 | 212 | 198 | 139 | 186 | 243 | 257 | 263 | 288 | 208 | 107 | 113 | 81 | 63 | 53 | 57 | 44 | 49 | 56 | 49 | 33 | 21 | 29 | 57 | 44 | 44 | 44 | 46 | 46 | 50 |
Wind (km/h) | ||||||||||||||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | glass | on | cross- off | on | on | cross- on | on | on | on | on | on | cross- on | on | on | on | cross- on | cross | cross- off | cross | cross- off | cross- off | cross- off | cross | cross- off | cross- off | cross | cross- off | glass | cross- on | cross- on | on | cross- on | cross- on | cross- on | cross- on |
High Tide / height (m) | 5:08PM 0.75 | 2:34AM 0.49 | 6:01PM 0.72 | 7:13PM 0.70 | 8:42PM 0.71 | 9:53PM 0.73 | 9:26AM 0.34 | 10:42PM 0.75 | 11:15AM 0.42 | 11:21PM 0.76 | 12:08PM 0.53 | 11:54PM 0.75 | 12:52PM 0.65 | 12:26AM 0.72 | 1:35PM 0.76 | 12:56AM 0.68 | 2:18PM 0.85 | 1:26AM 0.63 | 3:02PM 0.91 | 1:53AM 0.57 | ||||||||||||||||
Low Tide / height (m) | 11:44PM 0.46 | 9:51AM 0.11 | 10:22AM 0.14 | 11:03AM 0.18 | 12:13PM 0.23 | 7:01AM 0.33 | 2:23PM 0.27 | 6:16AM 0.29 | 4:11PM 0.29 | 6:21AM 0.23 | 5:27PM 0.29 | 6:37AM 0.17 | 6:31PM 0.30 | 6:58AM 0.10 | 7:29PM 0.31 | 7:23AM 0.04 | 8:25PM 0.33 | 7:52AM -0.00 | 9:21PM 0.36 | 8:22AM -0.03 | ||||||||||||||||
Wed 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | Wednesday 23 | Thursday 24 | Friday 25 | Saturday 26 | Sunday 27 | Mon 28 | ||||||||||||||||||||||||
| Sunrise | - | - | 6:09 | - | - | 6:09 | - | - | 6:07 | - | - | 6:07 | - | - | 6:07 | - | - | 6:05 | - | - | 6:05 | - | - | 6:03 | - | - | 6:03 | - | - | 6:03 | - | - | 6:01 | - | - | 6:01 |
| Sunset | 6:50 | - | - | 6:51 | - | - | 6:51 | - | - | 6:51 | - | - | 6:52 | - | - | 6:52 | - | - | 6:52 | - | - | 6:52 | - | - | 6:52 | - | - | 6:52 | - | - | 6:53 | - | - | 6:53 | - | - |
 |  |  | | | | | | | | |  |  |  |  | | | | | | | | | | |  | | | | | | | | | | | |
Rain (mm) | - | 4 | 4 | 5 | 3 | 3 | 4 | 6 | 1 | 4 | 3 | - | - | 2 | 3 | 1 | 6 | 5 | 3 | 3 | 2 | 1 | 3 | 1 | 1 | - | - | 1 | 1 | - | 1 | 2 | - | - | - | - |
| Temp. °C | 25 | 24 | 23 | 24 | 24 | 23 | 24 | 24 | 24 | 24 | 23 | 23 | 24 | 23 | 23 | 24 | 24 | 25 | 25 | 24 | 24 | 25 | 24 | 25 | 26 | 25 | 25 | 26 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 23 |
| Feels °C (?) | 25 | 25 | 25 | 24 | 26 | 23 | 26 | 24 | 25 | 24 | 23 | 22 | 23 | 22 | 22 | 24 | 24 | 25 | 24 | 25 | 24 | 23 | 25 | 25 | 25 | 26 | 26 | 27 | 27 | 26 | 26 | 26 | 25 | 25 | 24 | 23 |
Short Range Forecast: Heavy rain (total 30mm), heaviest during Thu afternoon. Warm (max 25°C on Wed afternoon, min 23°C on Wed night). Wind will be generally light. | Days 3-6 Weather Summary Heavy rain (total 24mm), heaviest during Sat afternoon. Warm (max 25°C on Tue morning, min 23°C on Sat afternoon). Wind will be generally light. | Days 6-9 Weather Summary Moderate rain (total 14mm), heaviest on Tue afternoon. Warm (max 26°C on Thu afternoon, min 23°C on Tue night). Wind will be generally light. | Long Range Forecast: Light rain (total 6mm), mostly falling on Fri afternoon. Warm (max 26°C on Fri afternoon, min 23°C on Fri night). Wind will be generally light. | |||||||||||||||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Castles Beach surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Information about the Castles Beach Surf forecast
The above surf forecast table for Castles Beach provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Castles Beach can be found by selecting the local surf guide option on the grey menu. Our Castles Beach surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Castles Beach) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Castles Beach may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Castles is 2 km (1 miles) from Kailua. If you plan a vacation in Oahu, look for hotels and other accommodation in Kailua. Kailua has rooms for a wide range of budgets as well as car hire and transport links.
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