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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 pm Tuesday 12 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 4AM is: 1.8m 7s primary swell from a East direction and 0.3m 15s secondary swell from a South direction (forecast issued at 07:00pm May 12). An open ocean swell of 0.6m 10s 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 (1.8m) | 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 ForecastModerate rain (total 13mm), heaviest on Fri afternoon. Warm (max 24°C on Tue night, min 23°C on Tue night). Winds decreasing (fresh winds from the ENE on Wed night, light winds from the E by Fri afternoon). | ||||||||||||||||||||||||
Tue 12 | Wednesday 13 | Thursday 14 | Fri 15 | |||||||||||||||||||||
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 | 11 AM | 2 PM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
ENE 6 | ENE 6 | E 7 | E 7 | E 7 | E 7 | ENE 7 | ENE 7 | 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 | E 8 | E 8 | |
212 | 273 | 316 | 326 | 293 | 293 | 290 | 268 | 268 | 342 | 352 | 362 | 336 | 301 | 286 | 254 | 237 | 228 | 273 | 181 | 316 | 277 | 300 | 292 | |
Wind (km/h) | ||||||||||||||||||||||||
on | on | on | on | on | on | on | cross-on | on | on | on | on | on | on | on | on | cross-on | on | on | on | on | on | on | on | |
High Tide | 11:15PM0.65m | 1:01PM0.74m | 11:50PM0.61m | 1:42PM0.84m | 00:24AM0.57m | |||||||||||||||||||
Low Tide | 5:45PM0.39m | 6:01AM0.12m | 6:52PM0.39m | 6:29AM0.05m | 7:53PM0.39m | 7:00AM-0.00m | ||||||||||||||||||
 |  | |  | | | | |  | | | | |  | | | | |  |  | |  | |  | |
 | — | — | — | — | 5:52 | — | — | — | — | — | — | — | 5:52 | — | — | — | — | — | — | — | 5:52 | — | — | — |
 | 7:00 | — | — | — | — | — | — | — | 7:00 | — | — | — | — | — | — | — | 7:00 | — | — | — | — | — | — | 7:01 |
— | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | 1 | 1 | 2 | 2 | — | — | |
Temp °C | 24 | 24 | 24 | 23 | 23 | 24 | 24 | 23 | 24 | 24 | 23 | 23 | 23 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 |
21 | 21 | 21 | 19 | 19 | 21 | 21 | 20 | 21 | 21 | 19 | 20 | 21 | 22 | 22 | 23 | 23 | 23 | 23 | 23 | 24 | 24 | 24 | 25 | |
Swell 1 Height (m) Direction Period (s) | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 9 | NNW 9 | NNW 9 | N 9 | N 8 | NW 17 | NW 16 | NNW 16 | NW 15 | NW 15 | NW 15 | NW 15 | NW 14 | NW 14 | NW 13 | NNW 13 | NNW 13 | NW 13 | NNW 12 |
 kJ | 114 | 86 | 85 | 83 | 72 | 50 | 32 | 32 | 26 | 35 | 76 | 132 | 177 | 242 | 322 | 318 | 418 | 469 | 437 | 352 | 304 | 295 | 230 | 187 |
Swell 2 Height (m) Direction Period (s) | S 16 | S 16 | S 15 | S 15 | S 15 | S 15 | S 15 | N 9 | NW 9 | NW 9 | N 8 | N 8 | N 8 | N 8 | N 8 | N 8 | N 8 | N 8 | N 8 | ESE 8 | N 8 | NNE 7 | N 8 | N 8 |
| kJ | 45 | 20 | 19 | 38 | 38 | 38 | 38 | 15 | 20 | 12 | 22 | 22 | 22 | 22 | 22 | 34 | 22 | 22 | 21 | 62 | 11 | 31 | 12 | 12 |
Swell 3 Height (m) Direction Period (s) | S 9 | N 12 | N 12 | N 12 | N 12 | S 11 | N 10 | S 14 | S 14 | NW 18 | NW 9 | NW 9 | NW 9 | NNW 9 | NW 11 | NNW 11 | SW 18 | NW 10 | S 12 | N 8 | S 12 | NNE 8 | SSE 11 | SSE 11 |
| kJ | 2 | 12 | 12 | 11 | 10 | 2 | 8 | 16 | 15 | 50 | 12 | 12 | 12 | 7 | 19 | 11 | 12 | 15 | 11 | 22 | 11 | 13 | 13 | 12 |
Wind waves Height (m) Direction Period (s) | ENE 6 | ENE 6 | E 7 | E 7 | E 7 | E 7 | ENE 7 | ENE 7 | 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 | E 8 | E 8 |
| kJ | 212 | 273 | 316 | 326 | 293 | 293 | 290 | 268 | 268 | 342 | 352 | 362 | 336 | 301 | 286 | 254 | 237 | 228 | 273 | 181 | 316 | 277 | 300 | 292 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 45 | 45 | 45 | 45 | 45 | 45 | 45 | 45 | 49 | 47 | 45 | 41 | 41 | 41 | 41 | 41 | 41 | 18 | 19 | 18 | 18 | 18 | 41 | 18 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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