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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 Sunday 10 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 3AM is: 1.1m 5s primary swell from a East-northeast direction and 0.5m 8s secondary swell from a East direction (forecast issued at 07:00pm May 10). An open ocean swell of 0.9m 12s is not directed at the surf break. The wind direction is predicted to be cross-onshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (11 May) | 3.5ft (1.0m) | 5s |
| Afternoon (11 May) | 4ft (1.2m) | 5s |
| Evening (11 May) | 4.5ft (1.3m) | 6s |
Table - waves today at Castles Beach. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 2mm), mostly falling on Sun night. Warm (max 24°C on Sun night, min 23°C on Sun night). Mainly fresh winds. | ||||||||||||||||||||||||
Sun 10 | Monday 11 | Tuesday 12 | Wed 13 | |||||||||||||||||||||
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 5 | ENE 5 | ENE 5 | ENE 5 | ENE 5 | ENE 5 | E 5 | ENE 5 | E 6 | E 6 | E 6 | E 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | E 7 | E 7 | E 7 | E 7 | E 7 | ENE 7 | |
80 | 71 | 83 | 49 | 62 | 58 | 81 | 78 | 84 | 88 | 121 | 164 | 199 | 244 | 237 | 265 | 237 | 273 | 316 | 331 | 297 | 289 | 284 | 330 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | |
High Tide | 10:02PM0.69m | 11:37AM0.51m | 10:40PM0.68m | 12:20PM0.63m | 11:15PM0.65m | 1:01PM0.74m | ||||||||||||||||||
Low Tide | 2:41PM0.36m | 5:22AM0.25m | 4:25PM0.38m | 5:39AM0.18m | 5:45PM0.39m | 6:01AM0.12m | ||||||||||||||||||
 |  | | |  | | |  | | | |  | | | | | | | | | | | | | |
 | — | — | — | — | 5:54 | — | — | — | — | — | — | — | 5:54 | — | — | — | — | — | — | — | 5:52 | — | — | — |
 | 7:00 | — | — | — | — | — | — | — | 7:00 | — | — | — | — | — | — | — | 7:00 | — | — | — | — | — | — | 7:00 |
— | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 24 | 24 | 23 | 23 | 23 | 23 | 23 | 23 | 24 | 23 | 23 | 23 | 23 | 24 | 24 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 |
22 | 23 | 21 | 22 | 22 | 21 | 20 | 20 | 21 | 20 | 19 | 19 | 19 | 20 | 20 | 19 | 19 | 19 | 19 | 20 | 19 | 19 | 20 | 19 | |
Swell 1 Height (m) Direction Period (s) | NNW 10 | NNW 10 | NNW 12 | NNW 12 | NNW 12 | NNW 12 | NW 11 | NW 11 | N 7 | N 7 | N 7 | N 7 | N 7 | NNW 12 | NNW 11 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 9 | NNW 9 | NW 9 |
 kJ | 166 | 140 | 265 | 269 | 177 | 171 | 121 | 117 | 43 | 58 | 57 | 59 | 57 | 106 | 91 | 118 | 114 | 111 | 85 | 83 | 52 | 50 | 47 | 21 |
Swell 2 Height (m) Direction Period (s) | ESE 8 | NNW 12 | ESE 8 | E 8 | N 7 | N 7 | N 7 | N 7 | NW 11 | NNW 11 | NW 11 | NW 11 | NW 10 | NW 11 | NW 10 | S 16 | S 16 | S 16 | S 15 | S 15 | S 15 | S 15 | S 14 | N 9 |
| kJ | 21 | 104 | 22 | 33 | 32 | 32 | 22 | 33 | 90 | 75 | 55 | 55 | 53 | 18 | 16 | 46 | 45 | 20 | 19 | 38 | 38 | 38 | 16 | 15 |
Swell 3 Height (m) Direction Period (s) | NW 13 | ESE 8 | S 17 | S 19 | ESE 8 | E 8 | S 19 | S 18 | ESE 8 | ESE 8 | N 14 | NNW 13 | NNW 12 | S 16 | S 16 | S 12 | S 12 | N 12 | N 12 | N 12 | N 12 | S 11 | N 10 | S 14 |
| kJ | 44 | 14 | 5 | 7 | 21 | 30 | 27 | 25 | 14 | 14 | 14 | 33 | 50 | 20 | 46 | 3 | 3 | 12 | 12 | 11 | 10 | 2 | 8 | 16 |
Wind waves Height (m) Direction Period (s) | ENE 6 | ENE 5 | ENE 5 | ENE 5 | ENE 5 | ENE 5 | ENE 5 | E 5 | ENE 5 | E 6 | E 6 | E 6 | E 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | E 7 | E 7 | E 7 | E 7 | E 7 | ENE 7 |
| kJ | 80 | 71 | 83 | 49 | 62 | 58 | 81 | 78 | 84 | 88 | 121 | 164 | 199 | 244 | 237 | 265 | 237 | 273 | 316 | 331 | 297 | 289 | 284 | 330 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 123 | 41 | 41 | 41 | 41 | 41 | 41 | 123 | 123 | 41 | 45 | 45 | 45 | 45 | 47 | 49 | 51 | 45 | 47 | 45 | 45 | 47 | 45 | 49 |
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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