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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 pm Saturday 30 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
25.0° C
(Which is slightly cooler than normal)How big are the waves at Castles Beach today (30 May):
- Afternoon surf: Afternoon surf (30 May, local time) - 1.5ft (0.5m), 16s period with S swell.
- Evening surf: Evening surf (30 May, local time) - 4ft (1.2m), 7s period with ENE swell.
The current surf forecast for Castles Beach at 10PM is: 1.2m 7s primary swell from a East-northeast direction and 0.4m 16s secondary swell from a South-southwest direction (forecast issued at 07:00pm May 30). An open ocean swell of 0.5m 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 (30 May) | - | - |
| Afternoon (30 May) | 1.5ft (0.5m) | 16s |
| Evening (30 May) | 4ft (1.2m) | 7s |
Table - waves today at Castles Beach. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastModerate rain (total 14mm), heaviest on Tue morning. Warm (max 24°C on Sat night, min 23°C on Sat night). Wind will be generally light. | ||||||||||||||||||||||||
Sat 30 | Sunday 31 | Monday 1 | Tue 2 | |||||||||||||||||||||
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 | 11 AM | 2 PM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
ENE 7 | ENE 7 | ENE 7 | ENE 8 | NE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | NE 7 | E 8 | E 8 | S 18 | ENE 7 | ENE 7 | S 17 | S 16 | SSW 20 | S 20 | S 16 | ENE 6 | |
157 | 147 | 147 | 169 | 82 | 169 | 90 | 86 | 86 | 86 | 84 | 84 | 79 | 44 | 127 | 160 | 136 | 132 | 146 | 135 | 128 | 194 | 132 | 176 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | cross-on | cross-on | cross-on | cross-on | on | 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 | |
High Tide | 2:55PM0.85m | 1:06AM0.46m | 3:30PM0.85m | 1:34AM0.45m | 4:05PM0.84m | 2:01AM0.44m | ||||||||||||||||||
Low Tide | 9:47PM0.40m | 7:44AM0.05m | 10:26PM0.40m | 8:16AM0.05m | 11:08PM0.41m | 8:48AM0.06m | ||||||||||||||||||
 |  |  | | |  | | | |  | | | |  | | |  | | | | | | | | |
 | — | — | — | — | 5:48 | — | — | — | — | — | — | — | 5:48 | — | — | — | — | — | — | — | 5:48 | — | — | — |
 | 7:07 | — | — | — | — | — | — | — | 7:08 | — | — | — | — | — | — | — | 7:08 | — | — | — | — | — | — | 7:08 |
— | — | 1 | 1 | 1 | 1 | 1 | — | — | — | 1 | 1 | — | — | — | — | — | — | — | — | — | 2 | 2 | 2 | |
Temp °C | 24 | 24 | 23 | 23 | 23 | 23 | 24 | 24 | 24 | 24 | 23 | 23 | 23 | 23 | 23 | 24 | 24 | 24 | 23 | 23 | 23 | 23 | 23 | 24 |
23 | 24 | 23 | 24 | 24 | 24 | 25 | 25 | 24 | 25 | 24 | 24 | 24 | 23 | 22 | 24 | 24 | 24 | 22 | 22 | 22 | 23 | 23 | 24 | |
Swell 1 Height (m) Direction Period (s) | NNW 10 | NNW 10 | NNW 10 | NE 7 | E 8 | NE 7 | E 8 | E 8 | E 8 | E 8 | N 11 | E 8 | E 8 | E 8 | NE 7 | S 18 | N 9 | N 9 | N 9 | S 16 | SSW 20 | S 16 | S 16 | N 12 |
 kJ | 55 | 75 | 54 | 89 | 57 | 77 | 43 | 42 | 29 | 30 | 59 | 33 | 44 | 44 | 33 | 160 | 45 | 42 | 41 | 135 | 128 | 131 | 132 | 139 |
Swell 2 Height (m) Direction Period (s) | S 16 | SSW 16 | SSW 16 | ESE 8 | NNW 10 | ESE 8 | NNW 9 | N 9 | N 11 | N 11 | E 8 | N 10 | N 10 | N 10 | N 10 | N 10 | SSW 18 | SSW 17 | S 17 | NNW 9 | NNW 9 | S 20 | N 12 | S 16 |
| kJ | 134 | 86 | 84 | 60 | 31 | 62 | 28 | 43 | 61 | 61 | 32 | 53 | 50 | 50 | 49 | 48 | 103 | 101 | 146 | 27 | 26 | 194 | 76 | 129 |
Swell 3 Height (m) Direction Period (s) | NNE 10 | NNE 10 | NNE 10 | N 10 | SSW 16 | N 9 | N 8 | N 8 | NNE 8 | N 8 | NNE 8 | SSW 14 | SSW 14 | NE 7 | SSW 18 | N 7 | SSW 13 | S 21 | S 21 | S 21 | ESE 8 | NNW 9 | E 8 | SSW 19 |
| kJ | 19 | 18 | 18 | 48 | 80 | 43 | 20 | 32 | 22 | 18 | 19 | 69 | 68 | 24 | 107 | 9 | 35 | 80 | 81 | 78 | 20 | 26 | 29 | 125 |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 7 | ENE 7 | ENE 8 | NE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | NE 7 | ENE 5 | E 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 |
| kJ | 157 | 147 | 147 | 169 | 82 | 169 | 90 | 86 | 86 | 86 | 84 | 84 | 79 | 29 | 127 | 140 | 136 | 132 | 124 | 106 | 96 | 96 | 103 | 176 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 41 | 41 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 |
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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