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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 am Thursday 23 Apr 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
24.9° 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 11AM is: 1.1m 11s primary swell from a North-northeast direction and 0.6m 4s secondary swell from a East-northeast direction (forecast issued at 07:00am April 23). An open ocean swell of 0.7m 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 (23 Apr) | 3.5ft (1.1m) | 11s |
| Afternoon (23 Apr) | 3.5ft (1.0m) | 11s |
| Evening (23 Apr) | 3ft (0.9m) | 10s |
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 7mm), mostly falling on Thu morning. Warm (max 24°C on Thu morning, min 22°C on Thu night). Mainly fresh winds. | ||||||||||||||||||||||||
Thursday 23 | Friday 24 | Saturday 25 | Sun 26 | |||||||||||||||||||||
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 | 2 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
NNE 11 | NNE 11 | NNE 11 | NNE 11 | NNE 10 | NNE 10 | NNE 10 | NNE 10 | NNE 10 | NNE 10 | NNE 9 | NNE 9 | NNE 9 | NE 9 | NE 9 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | |
307 | 270 | 265 | 218 | 206 | 194 | 157 | 140 | 137 | 105 | 161 | 130 | 127 | 155 | 178 | 322 | 435 | 458 | 424 | 361 | 284 | 296 | 264 | 245 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | |
High Tide | 9:32PM0.76m | 9:47AM0.35m | 10:30PM0.74m | 11:27AM0.44m | 11:13PM0.72m | |||||||||||||||||||
Low Tide | 12:18PM0.22m | 6:14AM0.32m | 2:20PM0.29m | 6:06AM0.28m | 4:13PM0.32m | |||||||||||||||||||
 |  | |  | |  |  |  | |  | | | | |  | | |  | | | | | | | |
 | 6:05 | — | — | — | — | — | — | — | 6:03 | — | — | — | — | — | — | — | 6:03 | — | — | — | — | — | — | 6:03 |
 | — | — | — | — | 6:52 | — | — | — | — | — | — | — | 6:52 | — | — | — | — | — | — | — | 6:52 | — | — | 6:53 |
1 | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | 1 | 1 | 1 | — | — | — | 1 | |
Temp °C | 23 | 23 | 24 | 24 | 24 | 23 | 23 | 23 | 22 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 24 | 24 | 23 | 23 | 23 |
23 | 23 | 24 | 24 | 24 | 22 | 22 | 22 | 21 | 22 | 22 | 23 | 22 | 22 | 21 | 21 | 21 | 21 | 21 | 23 | 23 | 22 | 22 | 22 | |
Swell 1 Height (m) Direction Period (s) | NNE 11 | NNE 11 | NNE 11 | NNE 11 | NNE 10 | NNE 10 | NNE 10 | NNE 10 | NNE 10 | NNE 10 | NNE 9 | NNE 9 | NNE 9 | NE 9 | NW 12 | NNW 12 | NW 12 | NW 12 | NW 14 | NW 13 | NW 13 | NW 13 | NE 8 | NE 8 |
 kJ | 307 | 270 | 265 | 218 | 206 | 194 | 157 | 140 | 137 | 105 | 161 | 130 | 127 | 155 | 73 | 56 | 68 | 73 | 186 | 178 | 175 | 172 | 264 | 245 |
Swell 2 Height (m) Direction Period (s) | NNW 12 | NNW 12 | NW 12 | NNW 12 | NNW 12 | NNW 12 | NNW 12 | NNW 12 | NNW 12 | NNW 12 | NW 11 | NW 11 | NNW 11 | NNW 13 | ESE 7 | NW 15 | NW 15 | NW 15 | SW 15 | SSW 16 | NNE 8 | SSW 16 | NW 13 | NW 12 |
| kJ | 199 | 193 | 149 | 127 | 94 | 94 | 93 | 54 | 53 | 53 | 33 | 31 | 23 | 67 | 5 | 55 | 54 | 55 | 9 | 24 | 55 | 24 | 164 | 149 |
Swell 3 Height (m) Direction Period (s) | ESE 7 | ESE 8 | S 11 | WNW 16 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 7 | ESE 7 | ESE 7 | ESE 7 | ESE 7 | S 10 | NW 12 | SSW 16 | SW 16 | S 12 | S 9 | SSW 16 | S 9 | SSW 16 | SSW 15 |
| kJ | 18 | 19 | 9 | 25 | 11 | 11 | 11 | 6 | 6 | 5 | 5 | 5 | 5 | 5 | 2 | 5 | 25 | 10 | 3 | 2 | 24 | 2 | 24 | 22 |
Wind waves Height (m) Direction Period (s) | ENE 4 | ENE 4 | ENE 4 | ENE 4 | NE 4 | NE 4 | NE 4 | NE 5 | NE 5 | NE 5 | E 5 | E 5 | E 5 | — | NE 9 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | — | — |
| kJ | 5 | 10 | 11 | 11 | 13 | 18 | 23 | 31 | 31 | 32 | 11 | 11 | 11 | — | 178 | 322 | 435 | 458 | 424 | 361 | 284 | 296 | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 41 | 41 | 18 | 18 | 19 | 41 | 41 | 41 | 41 | 41 | 41 | 18 | 18 | 18 |
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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