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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 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 6PM is: 1.6m 8s primary swell from a East direction (forecast issued at 01:00pm May 15). An open ocean swell of 0.7m 12s is not directed at the surf break, a second open ocean swell of 0.3m 8s 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) | 5ft (1.6m) | 8s |
| Evening (15 May) | 5ft (1.6m) | 8s |
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 9mm), mostly falling on Fri afternoon. Warm (max 25°C on Fri afternoon, min 24°C on Fri afternoon). Wind will be generally light. | ||||||||||||||||||||||||
Fri 15 | Saturday 16 | Sunday 17 | Mon 18 | |||||||||||||||||||||
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 |    |    |    |    | ||||||||||||||||||||
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 | ENE 8 | ENE 8 | |
160 | 265 | 300 | 292 | 316 | 324 | 373 | 373 | 383 | 383 | 404 | 392 | 350 | 359 | 392 | 350 | 318 | 318 | 291 | 291 | 370 | 404 | 392 | 392 | |
Wind (km/h) | ||||||||||||||||||||||||
on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | cross-on | cross-on | on | on | on | on | on | on | |
High Tide | 2:24PM0.91m | 00:58AM0.53m | 3:09PM0.95m | 1:32AM0.50m | 3:56PM0.96m | 2:04AM0.47m | ||||||||||||||||||
Low Tide | 8:51PM0.39m | 7:34AM-0.04m | 9:49PM0.39m | 8:11AM-0.05m | 10:51PM0.40m | |||||||||||||||||||
 | | |  | |  |  |  | | | |  | | |  |  | | | | | | | | | |
 | — | — | — | — | — | — | 5:52 | — | — | — | — | — | — | — | 5:50 | — | — | — | — | — | — | — | 5:50 | — |
 | — | — | 7:01 | — | — | — | — | — | — | — | 7:01 | — | — | — | — | — | — | — | 7:02 | — | — | — | — | 7:02 |
1 | 2 | 2 | — | — | — | — | — | — | — | — | 1 | 1 | 1 | 1 | 1 | — | — | — | — | — | — | — | — | |
Temp °C | 25 | 25 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 |
26 | 25 | 23 | 23 | 23 | 24 | 25 | 24 | 24 | 24 | 24 | 24 | 26 | 25 | 26 | 25 | 25 | 25 | 24 | 25 | 24 | 24 | 24 | 24 | |
Swell 1 Height (m) Direction Period (s) | NE 7 | NW 12 | NW 12 | NW 12 | NW 12 | NNW 11 | NNW 11 | NW 11 | NW 11 | NW 11 | NNW 11 | NNW 11 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NW 10 | NNW 10 | NNW 9 | NNW 9 | NNW 9 |
 kJ | 160 | 212 | 147 | 144 | 112 | 84 | 82 | 59 | 58 | 58 | 47 | 46 | 42 | 42 | 42 | 42 | 41 | 39 | 38 | 24 | 18 | 17 | 16 | 16 |
Swell 2 Height (m) Direction Period (s) | E 8 | N 8 | N 8 | N 8 | N 8 | NNW 15 | SSE 11 | NNW 13 | NNW 13 | SSE 10 | SSW 16 | SSW 16 | SSE 12 | SSE 11 | SSE 11 | SSE 7 | SSW 15 | SSW 15 | SSE 11 | SSE 11 | SSE 10 | SSE 10 | SSW 14 | SSW 14 |
| kJ | 157 | 12 | 11 | 5 | 5 | 21 | 11 | 18 | 17 | 10 | 26 | 26 | 14 | 25 | 47 | 10 | 44 | 44 | 23 | 22 | 21 | 20 | 41 | 20 |
Swell 3 Height (m) Direction Period (s) | NW 12 | SSE 11 | SSE 11 | SSE 11 | SSE 11 | SSE 11 | N 15 | SSE 11 | SSE 10 | NNW 13 | SSE 10 | SSE 12 | NNW 12 | SSW 17 | SSW 17 | SSE 11 | SSE 11 | SSE 11 | SSW 15 | SSW 15 | SSW 15 | SSW 15 | NNW 15 | NNW 14 |
| kJ | 227 | 12 | 12 | 12 | 12 | 11 | 17 | 11 | 11 | 17 | 10 | 14 | 14 | 29 | 27 | 23 | 12 | 12 | 22 | 44 | 43 | 42 | 21 | 20 |
Wind waves Height (m) Direction Period (s) | — | 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 | ENE 8 | ENE 8 |
| kJ | — | 265 | 300 | 292 | 316 | 324 | 373 | 373 | 383 | 383 | 404 | 392 | 350 | 359 | 392 | 350 | 318 | 318 | 291 | 291 | 370 | 404 | 392 | 392 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 13 | 18 | 18 | 41 | 19 | 18 | 18 | 18 | 21 | 18 | 41 | 41 | 18 | 18 | 18 | 19 | 18 | 18 | 41 | 18 | 18 | 18 | 41 | 41 |
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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