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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 Saturday 23 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
25.4° 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: 3.0m 8s primary swell from a East-northeast direction (forecast issued at 07:00am May 23). An open ocean swell of 0.4m 16s is not directed at the surf break, a second open ocean swell of 0.4m 10s 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 May) | 10ft (3.0m) | 8s |
| Afternoon (23 May) | 8ft (2.5m) | 8s |
| Evening (23 May) | 8ft (2.5m) | 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 4mm), mostly falling on Sat morning. Warm (max 23°C on Sat morning, min 22°C on Sat night). Mainly strong winds. | ||||||||||||||||||||||||
Saturday 23 | Sunday 24 | Monday 25 | Tue 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 |    |    |    |    | ||||||||||||||||||||
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 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | |
817 | 958 | 1109 | 1031 | 869 | 848 | 866 | 828 | 759 | 721 | 721 | 738 | 753 | 840 | 845 | 723 | 593 | 545 | 545 | 519 | 476 | 477 | 491 | 455 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | cross-on | on | on | on | on | on | on | on | cross-on | on | on | cross-on | on | cross-on | on | cross-on | |
High Tide | 9:44AM0.41m | 9:11PM0.70m | 11:18AM0.50m | 9:53PM0.65m | 12:10PM0.60m | 10:29PM0.60m | ||||||||||||||||||
Low Tide | 4:21AM0.29m | 1:41PM0.36m | 4:45AM0.25m | 3:41PM0.42m | 5:08AM0.20m | 5:21PM0.45m | ||||||||||||||||||
 |  |  |  | |  | | | | | | |  |  | | | | | | | | | | | |
 | 5:50 | — | — | — | — | — | — | — | 5:48 | — | — | — | — | — | — | — | 5:48 | — | — | — | — | — | — | 5:48 |
 | — | — | — | — | 7:05 | — | — | — | — | — | — | — | 7:06 | — | — | — | — | — | — | — | 7:06 | — | — | 7:06 |
— | 1 | — | — | — | — | — | — | — | — | — | — | 1 | 1 | 1 | — | — | — | — | — | — | — | — | — | |
Temp °C | 22 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 22 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 |
17 | 17 | 17 | 18 | 18 | 18 | 17 | 18 | 18 | 19 | 19 | 18 | 19 | 19 | 18 | 19 | 19 | 19 | 19 | 20 | 20 | 19 | 19 | 19 | |
Swell 1 Height (m) Direction Period (s) | NW 11 | NW 10 | NW 16 | NNW 16 | NNW 15 | NNW 14 | NNW 14 | NNW 13 | NNW 13 | NNW 13 | NNW 12 | NNW 12 | NNW 12 | NW 12 | NW 12 | NW 11 | NW 11 | NW 11 | NW 11 | NW 11 | NW 11 | NW 11 | NW 10 | NW 10 |
 kJ | 29 | 27 | 67 | 99 | 148 | 140 | 134 | 120 | 116 | 111 | 101 | 98 | 96 | 69 | 66 | 61 | 60 | 59 | 30 | 30 | 29 | 29 | 28 | 27 |
Swell 2 Height (m) Direction Period (s) | S 16 | S 16 | NW 10 | NW 10 | S 15 | S 15 | S 15 | S 15 | S 14 | S 14 | S 13 | S 13 | S 13 | S 16 | S 15 | S 14 | S 14 | S 14 | S 14 | S 14 | S 13 | S 13 | S 13 | S 13 |
| kJ | 46 | 46 | 27 | 26 | 39 | 38 | 38 | 38 | 36 | 33 | 32 | 32 | 32 | 43 | 38 | 37 | 37 | 16 | 36 | 35 | 32 | 31 | 31 | 31 |
Swell 3 Height (m) Direction Period (s) | NNW 18 | NNW 18 | S 16 | S 15 | NW 10 | NW 10 | NNW 10 | NNW 10 | NNW 10 | SE 11 | S 16 | S 16 | S 16 | S 11 | — | S 21 | S 20 | S 12 | S 20 | — | S 20 | — | S 17 | S 17 |
| kJ | 31 | 60 | 45 | 42 | 26 | 25 | 10 | 9 | 9 | 5 | 21 | 21 | 20 | 2 | — | 8 | 8 | 11 | 7 | — | 7 | — | 5 | 5 |
Wind waves Height (m) Direction Period (s) | 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 | ENE 8 | ENE 8 | ENE 8 | ENE 7 |
| kJ | 817 | 958 | 1109 | 1031 | 869 | 848 | 866 | 828 | 759 | 721 | 721 | 738 | 753 | 840 | 845 | 723 | 593 | 545 | 545 | 519 | 476 | 477 | 491 | 455 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 47 | 128 | 205 | 125 | 128 | 127 | 51 | 45 | 41 | 47 | 123 | 123 | 123 | 51 | 125 | 51 | 123 | 42 | 45 | 49 | 45 | 51 | 41 | 41 |
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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