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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 am Friday 15 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 7AM is: 1.8m 8s primary swell from a East direction and 0.3m 8s secondary swell from a North-northeast direction (forecast issued at 01:00am May 15). An open ocean swell of 0.9m 13s is not directed at the surf break. The wind direction is predicted to be onshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (15 May) | 5.5ft (1.7m) | 8s |
| Afternoon (15 May) | 6ft (1.8m) | 8s |
| Evening (15 May) | 5.5ft (1.7m) | 8s |
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 22mm), heaviest during Fri afternoon. Warm (max 24°C on Fri morning, min 24°C on Fri morning). Wind will be generally light. | ||||||||||||||||||||||||
Friday 15 | Saturday 16 | Sunday 17 | ||||||||||||||||||||||
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 | 5 PM | 8 PM | 11 PM | |
Swell Height Map |    |    |    | |||||||||||||||||||||
ENE 7 | ENE 8 | E 8 | E 8 | E 8 | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | |
355 | 375 | 367 | 329 | 367 | 367 | 336 | 324 | 341 | 314 | 353 | 353 | 392 | 350 | 350 | 350 | 310 | 273 | 244 | 244 | 280 | 244 | 286 | 326 | |
Wind (km/h) | ||||||||||||||||||||||||
on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | |
High Tide | 00:24AM0.57m | 2:24PM0.91m | 00:58AM0.53m | 3:09PM0.95m | 1:32AM0.50m | 3:56PM0.96m | ||||||||||||||||||
Low Tide | 7:00AM-0.00m | 8:51PM0.39m | 7:34AM-0.04m | 9:49PM0.39m | 8:11AM-0.05m | 10:51PM0.40m | ||||||||||||||||||
 | |  | | |  | |  | | |  | | | | | | | |  | |  | | | | |
 | — | 5:52 | — | — | — | — | — | — | — | 5:52 | — | — | — | — | — | — | — | 5:50 | — | — | — | — | — | — |
 | — | — | — | — | — | 7:01 | — | — | — | — | — | — | — | 7:01 | — | — | — | — | — | — | — | 7:02 | — | — |
5 | 3 | 1 | 3 | 5 | 8 | 2 | — | — | — | — | — | — | — | 1 | 1 | — | — | 1 | — | — | — | — | — | |
Temp °C | 23 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 |
22 | 24 | 24 | 24 | 23 | 25 | 23 | 24 | 24 | 25 | 24 | 24 | 24 | 24 | 25 | 26 | 26 | 25 | 24 | 24 | 25 | 24 | 24 | 25 | |
Swell 1 Height (m) Direction Period (s) | NW 13 | NNW 13 | NNW 13 | NW 12 | NW 12 | NW 12 | NW 12 | NNW 12 | NNW 11 | ENE 8 | NW 11 | NW 11 | NW 11 | NW 11 | NNW 11 | NNW 10 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | NNW 10 | NNW 10 | NW 10 |
 kJ | 352 | 304 | 295 | 227 | 212 | 147 | 144 | 93 | 85 | 314 | 59 | 58 | 58 | 58 | 46 | 42 | 310 | 273 | 244 | 244 | 280 | 38 | 38 | 23 |
Swell 2 Height (m) Direction Period (s) | N 8 | N 8 | NNE 8 | N 8 | N 8 | N 8 | N 8 | SSE 11 | NNW 15 | NNW 11 | NNW 13 | NNW 13 | NNW 13 | SSW 16 | SSW 16 | SSE 12 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | SSW 15 | SSW 15 | SSW 15 |
| kJ | 22 | 20 | 13 | 12 | 5 | 11 | 11 | 12 | 21 | 82 | 18 | 17 | 17 | 26 | 26 | 14 | 42 | 42 | 42 | 41 | 39 | 44 | 44 | 43 |
Swell 3 Height (m) Direction Period (s) | S 12 | S 12 | S 12 | SSE 11 | SSE 11 | SSE 11 | SSE 11 | NNW 15 | SSE 11 | SSE 11 | SSE 11 | SSE 10 | SSE 10 | SSE 10 | SSE 12 | NNW 12 | SSE 12 | SSE 11 | SSE 11 | SSE 7 | SSE 7 | SSE 7 | NNW 16 | NNW 16 |
| kJ | 11 | 11 | 11 | 13 | 12 | 12 | 12 | 21 | 11 | 11 | 11 | 11 | 10 | 10 | 14 | 14 | 13 | 24 | 23 | 10 | 9 | 9 | 26 | 25 |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 8 | E 8 | E 8 | E 8 | E 8 | ENE 8 | ENE 8 | ENE 8 | — | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | — | — | — | — | — | ENE 8 | ENE 8 | ENE 8 |
| kJ | 355 | 375 | 367 | 329 | 367 | 367 | 336 | 324 | 341 | — | 353 | 353 | 392 | 350 | 350 | 350 | — | — | — | — | — | 244 | 286 | 326 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 18 | 18 | 18 | 18 | 18 | 18 | 41 | 18 | 18 | 18 | 18 | 18 | 19 | 18 | 18 | 13 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 19 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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