Surf Forecasts:
How big are the waves at Castles Beach today (16 Aug):
- Morning surf: Morning surf (16 Aug, local time) - 15ft (4.5m), 10s period with E swell.
- Afternoon surf: Afternoon surf (16 Aug, local time) - 10ft (3.0m), 9s period with E swell.
- Evening surf: Evening surf (16 Aug, local time) - 7.5ft (2.3m), 8s period with E swell.
The current surf forecast for Castles Beach at 8AM is: 4.5m 10s primary swell from a East direction and 0.4m 17s secondary swell from a South direction (forecast issued at 01:00am August 16). An open ocean swell of 0.2m 8s is not directed at the surf break. The wind direction is predicted to be onshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (16 Aug) | 15ft (4.5m) | 10s |
| Afternoon (16 Aug) | 10ft (3.0m) | 9s |
| Evening (16 Aug) | 7.5ft (2.3m) | 8s |
Table - waves today at Castles Beach. (Swell directed towards the surf break)
Short Range ForecastHeavy rain (total 74mm), heaviest during Sun morning. Warm (max 26°C on Sun afternoon, min 25°C on Sun morning). Winds decreasing (near gales from the E on Sun morning, moderate winds from the ENE by Tue night). | ||||||||||||||||||||||||
Sunday 16 | Monday 17 | Tuesday 18 | ||||||||||||||||||||||
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 |  |  |  |  |  |  |  |  |  | |||||||||||||||
Wave Height (m) Direction Period (s) | E 10 | E 10 | E 10 | E 9 | E 9 | E 8 | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 7 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 4407 | 4725 | 4077 | 2346 | 1555 | 957 | 719 | 599 | 484 | 375 | 356 | 337 | 328 | 252 | 215 | 215 | 178 | 141 | 141 | 127 | 130 | 126 | 115 | 111 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | cross-on | cross-on | cross-on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on |
High Tide | 4:57AM0.62m | 4:27PM0.68m | 5:52AM0.61m | 4:33PM0.62m | 7:01AM0.60m | 4:19PM0.57m | ||||||||||||||||||
Low Tide | 10:29AM0.33m | 11:11PM0.19m | 11:08AM0.42m | 11:37PM0.19m | 11:57AM0.50m | |||||||||||||||||||
 |  |  | | | | | | |  |  | | |  |  | | | | | | | |  | | |
 | — | 6:09 | — | — | — | — | — | — | — | 6:09 | — | — | — | — | — | — | — | 6:09 | — | — | — | — | — | — |
 | — | — | — | — | — | 7:00 | — | — | — | — | — | — | — | 6:59 | — | — | — | — | — | — | — | 6:59 | — | — |
mm | 3 | 15 | 31 | 25 | 5 | 4 | 4 | 3 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 24 | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
Feels °C | 18 | 19 | 20 | 22 | 25 | 26 | 26 | 26 | 26 | 26 | 25 | 24 | 25 | 25 | 25 | 24 | 25 | 25 | 25 | 25 | 24 | 24 | 25 | 25 |
Swell 1 Height (m) Direction Period (s) | S 14 | S 14 | S 17 | S 16 | S 16 | SSE 8 | SSE 8 | SSE 8 | ENE 8 | S 7 | S 14 | S 14 | S 14 | S 14 | S 14 | S 14 | S 13 | S 13 | S 13 | S 13 | S 13 | S 13 | S 13 | S 13 |
| kJ | 63 | 37 | 95 | 83 | 46 | 90 | 85 | 58 | 484 | 24 | 103 | 103 | 66 | 65 | 63 | 59 | 55 | 55 | 54 | 54 | 53 | 30 | 30 | 29 |
Swell 2 Height (m) Direction Period (s) | S 18 | NNW 8 | NNW 8 | S 12 | S 13 | S 16 | S 16 | S 16 | SSE 7 | S 15 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 5 | S 5 | E 9 | E 9 | ENE 9 | NE 8 | SW 18 | SW 18 | NE 8 | NE 8 |
| kJ | 25 | 6 | 7 | 11 | 29 | 46 | 45 | 45 | 29 | 104 | 14 | 13 | 7 | 3 | 3 | 1 | 15 | 15 | 7 | 10 | 12 | 12 | 9 | 9 |
Swell 3 Height (m) Direction Period (s) | NNW 8 | S 18 | SW 19 | NNW 8 | NNW 8 | S 13 | S 13 | S 13 | S 13 | N 8 | N 8 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | N 7 | ENE 9 | SW 16 | SW 17 | W 13 | W 13 | SW 18 | SW 18 |
| kJ | 12 | 25 | 15 | 7 | 7 | 30 | 30 | 30 | 56 | 5 | 1 | 1 | 2 | 1 | 1 | 1 | 1 | 8 | 11 | 11 | 3 | 3 | 12 | 12 |
Wind waves Height (m) Direction Period (s) | E 10 | E 10 | E 10 | E 9 | E 9 | E 8 | E 8 | ENE 8 | — | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 7 |
| kJ | 4407 | 4725 | 4077 | 2346 | 1555 | 957 | 719 | 599 | — | 375 | 356 | 337 | 328 | 252 | 215 | 215 | 178 | 141 | 141 | 127 | 130 | 126 | 115 | 111 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 213 | 213 | 155 | 154 | 56 | 43 | 43 | 18 | 18 | 18 | 18 | 41 | 41 | 41 | 18 | 18 | 18 | 18 | 41 | 41 | 41 | 18 | 18 | 18 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
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