Surf Forecasts:
How big are the waves at Castles today (20 Aug):
- Afternoon surf: Afternoon surf (20 Aug, local time) - 4.5ft (1.4m), 9s period with S swell.
- Evening surf: Evening surf (20 Aug, local time) - 5ft (1.5m), 9s period with S swell.
The current surf forecast for Castles at 8PM is: 1.5m 9s primary swell from a South direction and 0.7m 6s secondary swell from a East-northeast direction, 0.9m 7s secondary swell from a East-southeast direction (forecast issued at 02:00pm August 20). The wind direction is predicted to be onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 Aug) | - | - |
| Afternoon (20 Aug) | 4.5ft (1.4m) | 9s |
| Evening (20 Aug) | 5ft (1.5m) | 9s |
Table - waves today at Castles. (Swell directed towards the surf break)
Short Range ForecastHeavy rain (total 30mm), heaviest during Fri night. Warm (max 28°C on Thu afternoon, min 26°C on Fri night). Winds increasing (moderate winds from the ESE on Thu night, near gales from the SE by Fri afternoon). | ||||||||||||||||||||
Thu 20 | Friday 21 | Saturday 22 | ||||||||||||||||||
12 PM | 3 PM | 6 PM | 9 PM | 12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | |
Swell Height Map |  |  |  |  |  |  |  |  | ||||||||||||
Wave Height (m) Direction Period (s) | S 9 | S 9 | S 9 | S 9 | SSE 9 | SSE 8 | S 8 | S 8 | SE 7 | SE 8 | SE 10 | SE 10 | SSE 10 | SE 10 | SE 10 | SSE 10 | SSE 10 | SSE 9 | SSE 8 | SE 8 |
Wave Graph  | ||||||||||||||||||||
 kJ | 234 | 306 | 351 | 349 | 453 | 534 | 270 | 196 | 595 | 2024 | 4105 | 4054 | 5584 | 4325 | 4567 | 3738 | 2994 | 1890 | 1485 | 773 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on |
High Tide | 12:25PM1.50m | 11:25PM1.84m | 2:21PM1.41m | 00:12AM1.77m | 4:51PM1.47m | |||||||||||||||
Low Tide | 5:15PM1.21m | 7:03AM0.80m | 5:48PM1.34m | 8:29AM0.80m | 7:37PM1.44m | |||||||||||||||
 | | |  | | | | | | |  | |  | | | | | | | | |
 | — | — | — | — | — | — | 6:03 | — | — | — | — | — | — | — | 6:03 | — | — | — | — | — |
 | — | — | 7:00 | — | — | — | — | — | — | — | 7:00 | — | — | — | — | — | — | — | 6:59 | — |
mm | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 2 | 1 | — | 1 | 1 | 1 | 3 | 1 | 1 | 2 | 1 | 1 |
Temp °C | 28 | 28 | 28 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 26 | 26 | 27 | 27 | 27 | 28 | 27 | 27 | 27 |
Feels °C | 30 | 30 | 30 | 29 | 28 | 27 | 27 | 28 | 25 | 22 | 23 | 21 | 22 | 23 | 24 | 24 | 24 | 23 | 25 | 25 |
Swell 1 Height (m) Direction Period (s) | S 9 | S 9 | S 9 | S 9 | ENE 6 | SW 8 | S 8 | S 8 | SW 8 | SW 9 | SW 9 | SW 10 | SW 10 | SW 10 | SW 9 | SW 10 | SW 10 | SW 10 | SW 9 | S 9 |
| kJ | 234 | 306 | 351 | 349 | 31 | 69 | 270 | 196 | 153 | 212 | 208 | 227 | 231 | 268 | 251 | 344 | 311 | 273 | 281 | 390 |
Swell 2 Height (m) Direction Period (s) | ENE 8 | ENE 7 | ENE 6 | ENE 6 | SW 9 | ENE 6 | SW 8 | SW 8 | SSW 8 | — | — | — | NE 9 | — | — | — | — | — | ENE 9 | SW 10 |
| kJ | 113 | 53 | 31 | 44 | 51 | 21 | 95 | 112 | 7 | — | — | — | 3 | — | — | — | — | — | 8 | 241 |
Swell 3 Height (m) Direction Period (s) | SW 9 | SW 9 | SW 9 | SW 9 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | — | — | — | — | — | — | — | — | — | — | E 10 | ENE 9 |
| kJ | 39 | 39 | 39 | 39 | 20 | 21 | 20 | 20 | — | — | — | — | — | — | — | — | — | — | 8 | 16 |
Wind waves Height (m) Direction Period (s) | SE 7 | SE 7 | ESE 7 | ESE 7 | SSE 9 | SSE 8 | ESE 6 | ESE 6 | SE 7 | SE 8 | SE 10 | SE 10 | SSE 10 | SE 10 | SE 10 | SSE 10 | SSE 10 | SSE 9 | SSE 8 | SE 8 |
| kJ | 176 | 160 | 88 | 78 | 453 | 534 | 114 | 107 | 595 | 2024 | 4105 | 4054 | 5584 | 4325 | 4567 | 3738 | 2994 | 1890 | 1485 | 773 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 28 | 28 | 28 | 28 | 17 | 596 | 588 | 588 | 588 | 588 | 588 | 588 | 588 | 588 | 588 | 588 | 588 | 596 | 596 | 588 |
Best forecast wave conditions in Okinawa | ||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||
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