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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 Monday 11 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
25.3° C
(Which is normal for this time of year)How big are the waves at Castles Beach today?
The current surf forecast for Castles Beach at 2AM is: 1.8m 6s primary swell from a East-northeast direction (forecast issued at 07:00pm May 11). An open ocean swell of 0.5m 11s is not directed at the surf break, a second open ocean swell of 0.3m 13s is not directed at the surf break. The wind direction is predicted to be onshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 May) | 5.5ft (1.7m) | 6s |
| Afternoon (12 May) | 6ft (1.8m) | 6s |
| Evening (12 May) | 6ft (1.8m) | 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 Wed afternoon. Warm (max 24°C on Mon night, min 23°C on Mon night). Mainly fresh winds. | ||||||||||||||||||||||||
Mon 11 | Tuesday 12 | Wednesday 13 | Thu 14 | |||||||||||||||||||||
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 |    |    |    |    | ||||||||||||||||||||
NE 6 | NE 6 | E 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | E 6 | E 7 | E 7 | E 7 | E 7 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | E 7 | ENE 7 | ENE 7 | ENE 7 | |
119 | 176 | 134 | 257 | 237 | 230 | 220 | 245 | 263 | 256 | 307 | 321 | 331 | 297 | 284 | 312 | 322 | 342 | 352 | 373 | 411 | 373 | 319 | 294 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | cross-on | cross-on | |
High Tide | 10:40PM0.68m | 12:20PM0.63m | 11:15PM0.65m | 1:01PM0.74m | 11:50PM0.61m | 1:42PM0.84m | ||||||||||||||||||
Low Tide | 4:25PM0.38m | 5:39AM0.18m | 5:45PM0.39m | 6:01AM0.12m | 6:52PM0.39m | 6:29AM0.05m | ||||||||||||||||||
 |  | |  |  | | | | | | | | | | |  | | | | | | | | | |
 | — | — | — | — | 5:54 | — | — | — | — | — | — | — | 5:52 | — | — | — | — | — | — | — | 5:52 | — | — | — |
 | 7:00 | — | — | — | — | — | — | — | 7:00 | — | — | — | — | — | — | — | 7:00 | — | — | — | — | — | — | 7:00 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — | |
Temp °C | 24 | 24 | 23 | 23 | 23 | 23 | 24 | 24 | 24 | 23 | 23 | 23 | 24 | 24 | 24 | 24 | 24 | 24 | 23 | 23 | 23 | 24 | 24 | 24 |
22 | 20 | 19 | 19 | 19 | 19 | 20 | 20 | 20 | 19 | 19 | 19 | 20 | 21 | 21 | 21 | 21 | 20 | 19 | 20 | 20 | 22 | 22 | 22 | |
Swell 1 Height (m) Direction Period (s) | NW 11 | NNW 11 | N 7 | NW 11 | NW 10 | NNW 12 | NNW 11 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 9 | NNW 9 | NNW 9 | NW 9 | N 9 | N 8 | NW 16 | NNW 16 | NW 15 | NW 15 | NNW 15 |
 kJ | 90 | 75 | 110 | 55 | 53 | 106 | 91 | 118 | 114 | 111 | 85 | 83 | 72 | 69 | 32 | 32 | 21 | 24 | 22 | 132 | 177 | 242 | 322 | 382 |
Swell 2 Height (m) Direction Period (s) | ESE 8 | S 18 | NW 11 | NNW 13 | NNW 12 | NW 11 | NW 10 | S 16 | S 16 | S 16 | S 15 | S 15 | S 15 | S 15 | S 15 | N 10 | N 9 | NW 9 | NW 17 | N 8 | N 8 | N 8 | N 8 | N 8 |
| kJ | 21 | 24 | 55 | 33 | 50 | 18 | 17 | 46 | 45 | 20 | 19 | 38 | 38 | 38 | 17 | 17 | 25 | 12 | 76 | 22 | 22 | 22 | 22 | 22 |
Swell 3 Height (m) Direction Period (s) | S 18 | N 14 | N 14 | S 17 | S 17 | S 16 | S 16 | S 12 | S 9 | N 12 | N 12 | N 12 | S 11 | S 11 | N 10 | S 14 | S 14 | NW 18 | NW 9 | NW 9 | NW 9 | NNW 9 | NW 11 | NW 11 |
| kJ | 24 | 4 | 14 | 24 | 24 | 20 | 46 | 3 | 2 | 12 | 12 | 11 | 2 | 2 | 8 | 16 | 15 | 50 | 12 | 12 | 12 | 7 | 19 | 30 |
Wind waves Height (m) Direction Period (s) | NE 6 | NE 6 | E 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | E 6 | E 7 | E 7 | E 7 | E 7 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | E 7 | ENE 7 | ENE 7 | ENE 7 |
| kJ | 119 | 176 | 134 | 257 | 237 | 230 | 220 | 245 | 263 | 256 | 307 | 321 | 331 | 297 | 284 | 312 | 322 | 342 | 352 | 373 | 411 | 373 | 319 | 294 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 123 | 45 | 45 | 41 | 45 | 45 | 45 | 45 | 50 | 45 | 45 | 45 | 45 | 45 | 45 | 50 | 47 | 45 | 45 | 41 | 41 | 41 | 41 | 45 |
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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