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) - 11ft (3.5m), 9s period with E swell.
- Evening surf: Evening surf (16 Aug, local time) - 8ft (2.4m), 8s period with ENE swell.
The current surf forecast for Castles Beach at 4PM is: 2.5m 9s primary swell from a East direction and 0.9m 8s secondary swell from a South-southeast direction, 0.3m 16s secondary swell from a South direction (forecast issued at 07:00am August 16). The wind direction is predicted to be cross-onshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (16 Aug) | 15ft (4.5m) | 10s |
| Afternoon (16 Aug) | 11ft (3.5m) | 9s |
| Evening (16 Aug) | 8ft (2.4m) | 8s |
Table - waves today at Castles Beach. (Swell directed towards the surf break)
Short Range ForecastHeavy rain (total 44mm), heaviest during Sun morning. Warm (max 27°C on Sun afternoon, min 24°C on Mon night). Winds decreasing (near gales from the ESE on Sun morning, moderate winds from the ENE by Tue morning). | |||||||||||||||||||||||
Sunday 16 | Monday 17 | Tuesday 18 | |||||||||||||||||||||
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 9 | E 9 | E 9 | ENE 8 | ENE 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 7 | ENE 7 | ENE 6 |
Wave Graph  | |||||||||||||||||||||||
 kJ | 4341 | 4708 | 2411 | 1693 | 1080 | 748 | 599 | 484 | 384 | 327 | 310 | 302 | 261 | 215 | 215 | 195 | 158 | 158 | 152 | 147 | 161 | 171 | 127 |
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 | cross-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 | 23 | 20 | 11 | 4 | 4 | 2 | 2 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 25 | 26 | 26 | 27 | 27 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 24 | 24 | 24 | 25 | 25 | 25 | 25 | 25 |
Feels °C | 19 | 21 | 23 | 25 | 27 | 27 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 24 | 23 | 23 | 24 | 25 | 25 | 25 | 24 | 25 |
Swell 1 Height (m) Direction Period (s) | S 14 | S 18 | SSE 10 | S 16 | SSE 8 | SSE 8 | SSE 7 | ENE 8 | ENE 8 | 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 | 37 | 25 | 416 | 46 | 119 | 85 | 57 | 484 | 384 | 103 | 103 | 103 | 65 | 63 | 59 | 55 | 55 | 54 | 30 | 30 | 30 | 30 | 29 |
Swell 2 Height (m) Direction Period (s) | S 18 | NNW 9 | S 16 | S 13 | S 16 | S 16 | S 16 | SSE 7 | S 7 | SSE 6 | SSE 6 | S 6 | S 6 | S 5 | N 7 | E 9 | E 9 | E 9 | SW 17 | SW 18 | SSE 8 | SW 18 | ENE 8 |
| kJ | 25 | 8 | 48 | 13 | 46 | 45 | 45 | 38 | 23 | 13 | 12 | 6 | 6 | 2 | 1 | 6 | 15 | 15 | 11 | 12 | 6 | 12 | 6 |
Swell 3 Height (m) Direction Period (s) | NNW 9 | SW 19 | NNW 8 | NNW 8 | S 13 | S 13 | S 13 | S 13 | S 15 | N 8 | N 8 | N 8 | N 7 | SW 6 | SW 6 | N 7 | N 7 | ENE 9 | N 7 | W 13 | SW 18 | W 12 | SSE 7 |
| kJ | 8 | 15 | 7 | 7 | 30 | 30 | 30 | 56 | 104 | 5 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 7 | 1 | 3 | 12 | 3 | 5 |
Wind waves Height (m) Direction Period (s) | E 10 | E 10 | E 9 | E 9 | E 9 | 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 7 | ENE 7 | ENE 6 |
| kJ | 4341 | 4708 | 2411 | 1693 | 1080 | 748 | 599 | — | — | 327 | 310 | 302 | 261 | 215 | 215 | 195 | 158 | 158 | 152 | 147 | 161 | 171 | 127 |
Nearest Offshore or Glassy | |||||||||||||||||||||||
Distance (km) | 213 | 233 | 233 | 160 | 43 | 43 | 43 | 18 | 18 | 19 | 41 | 41 | 41 | 18 | 18 | 18 | 41 | 19 | 41 | 41 | 19 | 18 | 19 |
Best forecast wave conditions in Oahu | |||||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||||
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