Surf Forecasts:
How big are the waves at Castles Beach today (21 Sep):
- Morning surf: Morning surf (21 Sep, local time) - 7ft (2.1m), 8s period with ENE swell.
- Afternoon surf: Afternoon surf (21 Sep, local time) - 6ft (1.8m), 8s period with ENE swell.
- Evening surf: Evening surf (21 Sep, local time) - 6ft (1.9m), 8s period with ENE swell.
The current surf forecast for Castles Beach at 12AM is: 2.2m 7s primary swell from a East-northeast direction and 0.4m 15s secondary swell from a South-southwest direction (forecast issued at 07:00pm September 20). An open ocean swell of 0.1m 10s is not directed at the surf break. The wind direction is predicted to be onshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 Sep) | 7ft (2.1m) | 8s |
| Afternoon (21 Sep) | 6ft (1.8m) | 8s |
| Evening (21 Sep) | 6ft (1.9m) | 8s |
Table - waves today at Castles Beach. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 4mm), mostly falling on Mon night. Warm (max 26°C on Mon morning, min 25°C on Sun night). Mainly strong winds. | |||||||||||||||||||
Sun 20 | Monday 21 | Tuesday 22 | |||||||||||||||||
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 |  |  |  |  |  |  |  | ||||||||||||
Wave Height (m) Direction Period (s) | ENE 8 | ENE 7 | ENE 7 | E 8 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | E 8 | E 8 | E 9 |
Wave Graph  | |||||||||||||||||||
 kJ | 438 | 420 | 461 | 504 | 500 | 456 | 416 | 438 | 418 | 429 | 406 | 427 | 404 | 392 | 359 | 402 | 383 | 439 | 621 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | on | on | on |
High Tide | 11:00PM0.37m | 12:20PM0.75m | 11:52PM0.43m | 12:44PM0.77m | |||||||||||||||
Low Tide | 7:51PM0.34m | 4:34AM0.24m | 7:28PM0.32m | 5:29AM0.21m | 7:28PM0.29m | ||||||||||||||
 |  |  |  | |  |  | | | | | |  |  | | | | | | |
 | — | — | — | — | 6:18 | — | — | — | — | — | — | — | 6:18 | — | — | — | — | — | — |
 | 6:29 | — | — | — | — | — | — | — | 6:28 | — | — | — | — | — | — | — | 6:27 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | 1 | 1 | — | — | — |
Temp °C | 26 | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 |
Feels °C | 25 | 22 | 22 | 22 | 22 | 23 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 27 | 26 | 26 | 26 | 26 |
Swell 1 Height (m) Direction Period (s) | SSW 15 | S 15 | SSW 15 | SSW 15 | SSW 14 | S 14 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | N 13 | N 12 | N 12 | NNW 12 | NNW 11 | NNW 11 | NNW 11 |
| kJ | 74 | 115 | 74 | 71 | 68 | 104 | 67 | 63 | 61 | 59 | 58 | 57 | 87 | 112 | 141 | 145 | 133 | 126 | 123 |
Swell 2 Height (m) Direction Period (s) | N 11 | N 11 | N 11 | N 10 | NNW 10 | N 10 | N 10 | NNW 10 | N 10 | NNW 10 | N 14 | N 14 | SSW 13 | SSW 13 | SSW 13 | S 13 | SSW 12 | S 12 | S 12 |
| kJ | 9 | 2 | 2 | 8 | 11 | 8 | 8 | 9 | 8 | 9 | 16 | 32 | 57 | 33 | 33 | 51 | 30 | 26 | 26 |
Swell 3 Height (m) Direction Period (s) | NW 9 | NW 9 | NW 8 | NW 8 | N 8 | NW 8 | NW 8 | NW 10 | NW 10 | N 15 | NNW 9 | NNW 10 | S 16 | S 16 | S 16 | SW 19 | SW 19 | SW 18 | SW 17 |
| kJ | 3 | 3 | 3 | 3 | 1 | 3 | 3 | 4 | 4 | 17 | 9 | 9 | 5 | 5 | 5 | 14 | 14 | 12 | 11 |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 7 | ENE 7 | E 8 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | E 8 | E 8 | E 9 |
| kJ | 438 | 420 | 461 | 504 | 500 | 456 | 416 | 438 | 418 | 429 | 406 | 427 | 404 | 392 | 359 | 402 | 383 | 439 | 621 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 47 | 45 | 45 | 45 | 41 | 41 | 41 | 41 | 45 | 41 | 41 | 41 | 18 | 41 | 41 | 41 | 42 | 41 | 41 |
Best forecast wave conditions in Oahu | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
Header Global | |||||||||||||||||||
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