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Castles Beach Surf Forecast
/ HAW – Oahu (122 breaks) / Hawaii (267 breaks) /
Surf Forecasts:
Castles Beach surfForecast / HAW – Oahu / USA
48hr Weather and Surf, issued 7 am Wednesday 13 May 2026 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
25.4° C
(Which is slightly warmer than usual)How big are the waves at Castles Beach today?
The current surf forecast for Castles Beach at 12PM is: 1.8m 6s primary swell from a East-northeast direction and 0.3m 15s secondary swell from a South direction (forecast issued at 07:00am May 13). An open ocean swell of 0.4m 9s is not directed at the surf break. The wind direction is predicted to be onshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (13 May) | 6ft (1.8m) | 7s |
| Afternoon (13 May) | 6ft (1.9m) | 6s |
| Evening (13 May) | 6ft (1.9m) | 7s |
Table - waves today at Castles Beach. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastModerate rain (total 15mm), heaviest on Fri night. Warm (max 24°C on Wed morning, min 23°C on Wed morning). Winds decreasing (fresh winds from the ENE on Wed afternoon, light winds from the ESE by Fri morning). | ||||||||||||||||||||||||
Wednesday 13 | Thursday 14 | Friday 15 | Sat 16 | |||||||||||||||||||||
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 | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
E 7 | E 7 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 7 | E 8 | E 8 | ENE 8 | ENE 8 | ENE 8 | E 8 | E 8 | E 8 | |
284 | 293 | 253 | 289 | 307 | 352 | 352 | 326 | 302 | 302 | 270 | 289 | 258 | 231 | 244 | 173 | 203 | 279 | 240 | 246 | 238 | 280 | 318 | 324 | |
Wind (km/h) | ||||||||||||||||||||||||
on | on | on | on | on | on | on | on | on | on | cross-on | on | cross-on | cross-on | on | on | on | on | on | on | on | on | on | on | |
High Tide | 1:01PM0.74m | 11:50PM0.61m | 1:42PM0.84m | 00:24AM0.57m | 2:24PM0.91m | 00:58AM0.53m | ||||||||||||||||||
Low Tide | 6:01AM0.12m | 6:52PM0.39m | 6:29AM0.05m | 7:53PM0.39m | 7:00AM-0.00m | 8:51PM0.39m | ||||||||||||||||||
 |  | | | | | | |  |  | | | | | |  | |  | | | |  | |  | |
 | 5:52 | — | — | — | — | — | — | — | 5:52 | — | — | — | — | — | — | — | 5:52 | — | — | — | — | — | — | 5:52 |
 | — | — | — | — | 7:00 | — | — | — | — | — | — | — | 7:00 | — | — | — | — | — | — | — | 7:01 | — | — | 7:01 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | 1 | — | 2 | 3 | 3 | 4 | — | |
Temp °C | 23 | 23 | 24 | 24 | 23 | 23 | 23 | 23 | 23 | 23 | 24 | 24 | 24 | 24 | 24 | 23 | 23 | 24 | 24 | 24 | 24 | 24 | 24 | 24 |
19 | 19 | 21 | 21 | 19 | 19 | 20 | 20 | 20 | 20 | 22 | 22 | 23 | 24 | 23 | 23 | 23 | 25 | 25 | 25 | 24 | 24 | 23 | 22 | |
Swell 1 Height (m) Direction Period (s) | NNW 10 | NNW 9 | NNW 9 | NNW 9 | NW 9 | N 9 | N 8 | NW 16 | NNW 16 | NW 15 | NW 15 | NNW 15 | NW 15 | NW 14 | NW 14 | ENE 7 | E 8 | E 8 | NW 13 | NW 12 | NW 12 | NW 12 | NW 12 | E 8 |
 kJ | 52 | 69 | 46 | 32 | 20 | 24 | 22 | 132 | 177 | 242 | 322 | 382 | 418 | 469 | 437 | 173 | 203 | 181 | 230 | 212 | 147 | 144 | 112 | 324 |
Swell 2 Height (m) Direction Period (s) | S 15 | S 15 | S 15 | N 9 | N 9 | NW 9 | NW 17 | N 8 | N 8 | N 8 | N 8 | N 8 | N 8 | N 8 | N 8 | NW 13 | NW 13 | NNW 13 | N 8 | N 8 | N 8 | N 6 | N 6 | NNW 11 |
| kJ | 38 | 38 | 38 | 15 | 15 | 12 | 76 | 23 | 22 | 22 | 22 | 34 | 22 | 22 | 21 | 352 | 342 | 295 | 12 | 12 | 32 | 39 | 19 | 84 |
Swell 3 Height (m) Direction Period (s) | N 12 | S 11 | N 10 | S 14 | S 14 | NW 18 | NW 9 | NW 9 | NW 8 | NNW 9 | NW 11 | S 12 | S 12 | NW 10 | SSE 12 | E 8 | NNE 7 | NE 7 | SSE 11 | SSE 11 | SSE 11 | SSE 11 | N 8 | N 6 |
| kJ | 10 | 2 | 8 | 16 | 15 | 50 | 12 | 12 | 11 | 7 | 19 | 11 | 11 | 15 | 14 | 63 | 44 | 54 | 12 | 12 | 12 | 12 | 10 | 21 |
Wind waves Height (m) Direction Period (s) | E 7 | E 7 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | — | — | E 8 | ENE 8 | ENE 8 | ENE 8 | E 8 | E 8 | — |
| kJ | 284 | 293 | 253 | 289 | 307 | 352 | 352 | 326 | 302 | 302 | 270 | 289 | 258 | 231 | 244 | — | — | 279 | 240 | 246 | 238 | 280 | 318 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 45 | 45 | 45 | 154 | 49 | 45 | 45 | 41 | 41 | 41 | 41 | 42 | 41 | 18 | 41 | 18 | 18 | 18 | 18 | 18 | 18 | 19 | 19 | 41 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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