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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 1 pm 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 10PM is: 1.9m 7s primary swell from a East-northeast direction (forecast issued at 01:00pm May 13). An open ocean swell of 0.5m 8s is not directed at the surf break, a second open ocean swell of 0.4m 17s 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) | 5.5ft (1.7m) | 7s |
| 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 ForecastHeavy rain (total 40mm), heaviest during Fri night. Warm (max 24°C on Wed afternoon, min 22°C on Fri night). Winds decreasing (fresh winds from the ENE on Wed afternoon, calm by Fri afternoon). | ||||||||||||||||||||||||
Wed 13 | Thursday 14 | Friday 15 | Sat 16 | |||||||||||||||||||||
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 | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
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 7 | E 8 | ENE 8 | ENE 8 | E 8 | E 8 | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | |
253 | 253 | 290 | 342 | 342 | 326 | 335 | 310 | 262 | 286 | 258 | 231 | 259 | 308 | 246 | 280 | 272 | 300 | 265 | 251 | 257 | 310 | 322 | 361 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | on | on | on | on | on | on | on | cross-on | on | cross-on | on | on | on | on | cross-on | on | on | glassy | cross-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 | 6:52PM0.39m | 6:29AM0.05m | 7:53PM0.39m | 7:00AM-0.00m | 8:51PM0.39m | 7:34AM-0.04m | ||||||||||||||||||
 | | |  | | |  |  |  | | | |  | |  | | | |  | | | | | | |
 | — | — | — | — | — | — | 5:52 | — | — | — | — | — | — | — | 5:52 | — | — | — | — | — | — | — | 5:52 | — |
 | — | — | 7:00 | — | — | — | — | — | — | — | 7:00 | — | — | — | — | — | — | — | 7:01 | — | — | — | — | 7:01 |
— | — | — | — | — | — | — | — | 1 | — | — | — | 1 | 1 | 1 | 1 | 1 | 2 | 9 | 22 | 1 | — | — | — | |
Temp °C | 24 | 24 | 24 | 23 | 23 | 23 | 23 | 23 | 24 | 24 | 24 | 24 | 24 | 23 | 23 | 24 | 24 | 24 | 23 | 22 | 23 | 23 | 24 | 24 |
21 | 21 | 20 | 19 | 19 | 20 | 20 | 20 | 22 | 22 | 23 | 24 | 24 | 23 | 24 | 25 | 25 | 24 | 25 | 22 | 23 | 22 | 24 | 24 | |
Swell 1 Height (m) Direction Period (s) | NNW 9 | NNW 9 | N 9 | N 8 | N 8 | NW 16 | NNW 16 | NW 15 | NW 15 | NNW 15 | NW 15 | NW 14 | NW 14 | ENE 7 | ENE 8 | NNW 13 | NW 12 | NW 12 | NW 12 | NW 12 | NW 12 | ENE 8 | NNW 11 | NW 11 |
 kJ | 47 | 32 | 26 | 35 | 22 | 132 | 177 | 242 | 326 | 382 | 418 | 469 | 437 | 163 | 246 | 295 | 227 | 212 | 147 | 144 | 112 | 310 | 81 | 59 |
Swell 2 Height (m) Direction Period (s) | S 15 | N 9 | NW 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 | N 8 | N 8 | N 8 | N 8 | N 8 | N 6 | NNW 11 | SSE 11 | NNW 13 |
| kJ | 38 | 15 | 20 | 12 | 76 | 22 | 22 | 22 | 22 | 35 | 22 | 22 | 21 | 352 | 342 | 12 | 11 | 12 | 21 | 31 | 22 | 84 | 11 | 18 |
Swell 3 Height (m) Direction Period (s) | N 10 | S 14 | S 14 | NW 18 | NW 9 | NW 9 | NW 8 | NNW 8 | NW 11 | S 12 | S 12 | NW 10 | SSE 12 | ESE 8 | N 8 | SSE 12 | SSE 11 | SSE 11 | SSE 11 | SSE 11 | NNW 15 | N 7 | NNW 15 | SSE 11 |
| kJ | 8 | 16 | 15 | 50 | 12 | 12 | 11 | 7 | 19 | 12 | 11 | 15 | 14 | 67 | 12 | 13 | 12 | 12 | 12 | 12 | 21 | 8 | 21 | 11 |
Wind waves Height (m) Direction Period (s) | 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 7 | E 8 | — | ENE 8 | E 8 | E 8 | E 8 | ENE 8 | ENE 8 | — | ENE 8 | ENE 8 |
| kJ | 253 | 253 | 290 | 342 | 342 | 326 | 335 | 310 | 262 | 286 | 258 | 231 | 259 | 308 | — | 280 | 272 | 300 | 265 | 251 | 257 | — | 322 | 361 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 49 | 154 | 51 | 45 | 45 | 41 | 41 | 41 | 41 | 41 | 41 | 18 | 41 | 18 | 18 | 13 | 18 | 18 | 0 | 18 | 18 | 18 | 18 | 18 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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Ocean Swells (m)- Wind Speed (km/h)
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