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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 Sunday 17 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 6AM is: 1.5m 8s primary swell from a East-northeast direction (forecast issued at 01:00am May 17). An open ocean swell of 0.4m 10s is not directed at the surf break. The wind direction is predicted to be onshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 May) | 4.5ft (1.4m) | 8s |
| Afternoon (17 May) | 4.5ft (1.4m) | 8s |
| Evening (17 May) | 6ft (1.8m) | 8s |
Table - waves today at Castles Beach. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastSome drizzle, heaviest during Mon night. Warm (max 25°C on Sun morning, min 23°C on Tue night). Winds increasing (light winds from the E on Sun morning, fresh winds from the ENE by Tue night). | ||||||||||||||||||||||||
Sunday 17 | Monday 18 | Tuesday 19 | ||||||||||||||||||||||
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 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | E 8 | E 8 | E 7 | E 7 | ENE 6 | ENE 7 | ENE 8 | |
322 | 291 | 291 | 256 | 256 | 256 | 412 | 414 | 533 | 509 | 473 | 437 | 437 | 427 | 383 | 341 | 333 | 279 | 292 | 269 | 285 | 253 | 373 | 472 | |
Wind (km/h) | ||||||||||||||||||||||||
glassy | 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 | 1:32AM0.50m | 3:56PM0.96m | 2:04AM0.47m | 4:46PM0.94m | 2:36AM0.44m | 5:38PM0.90m | ||||||||||||||||||
Low Tide | 8:11AM-0.05m | 10:51PM0.40m | 8:51AM-0.04m | 00:02AM0.41m | 9:32AM0.01m | |||||||||||||||||||
 |  |  | | | | |  | | |  | | | | | | |  | | | | | | | |
 | — | 5:50 | — | — | — | — | — | — | — | 5:50 | — | — | — | — | — | — | — | 5:50 | — | — | — | — | — | — |
 | — | — | — | — | — | 7:02 | — | — | — | — | — | — | — | 7:02 | — | — | — | — | — | — | — | 7:02 | — | — |
1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | |
Temp °C | 24 | 24 | 24 | 25 | 25 | 25 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 23 |
27 | 26 | 27 | 26 | 26 | 25 | 24 | 23 | 23 | 23 | 23 | 22 | 22 | 23 | 23 | 23 | 23 | 23 | 23 | 22 | 22 | 22 | 21 | 20 | |
Swell 1 Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | NW 10 | NNW 9 | NNW 9 | SSW 14 | SSW 14 | SSW 15 | SSW 16 | NW 12 | NW 12 | NW 11 | NW 11 | NW 11 | NNW 12 | NNW 12 | NNW 11 | NNW 11 | NNW 11 |
 kJ | 322 | 291 | 291 | 256 | 256 | 256 | 299 | 23 | 17 | 16 | 20 | 20 | 43 | 48 | 23 | 36 | 19 | 31 | 31 | 54 | 54 | 47 | 46 | 47 |
Swell 2 Height (m) Direction Period (s) | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NW 10 | SSW 15 | SSW 15 | SSW 14 | NNW 9 | NNW 13 | NNW 13 | NNW 12 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 17 | SSW 15 | SSW 15 |
| kJ | 42 | 42 | 42 | 41 | 39 | 38 | 24 | 43 | 21 | 20 | 8 | 18 | 17 | 15 | 18 | 18 | 18 | 18 | 19 | 40 | 20 | 59 | 42 | 44 |
Swell 3 Height (m) Direction Period (s) | SSE 9 | SSE 7 | SSE 7 | SSE 6 | SSE 6 | SSE 7 | SSE 7 | NNW 16 | NNW 15 | NNW 15 | NNW 14 | NNW 9 | SSW 19 | NNW 9 | SSW 19 | SSE 6 | NNW 13 | SSW 17 | SSW 18 | SSW 18 | SSE 10 | SE 10 | NNW 13 | N 13 |
| kJ | 16 | 20 | 18 | 8 | 7 | 10 | 10 | 25 | 22 | 21 | 20 | 8 | 37 | 8 | 37 | 4 | 17 | 28 | 30 | 30 | 10 | 4 | 18 | 14 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | ENE 8 | ENE 8 | ENE 8 | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | E 8 | E 8 | E 7 | E 7 | ENE 6 | ENE 7 | ENE 8 |
| kJ | — | — | — | — | — | — | 412 | 414 | 533 | 509 | 473 | 437 | 437 | 427 | 383 | 341 | 333 | 279 | 292 | 269 | 285 | 253 | 373 | 472 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 18 | 18 | 18 | 19 | 41 | 19 | 41 | 41 | 41 | 41 | 41 | 41 | 41 | 41 | 41 | 41 | 41 | 41 | 41 | 42 | 45 | 45 | 45 |
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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