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Surf Forecasts:
Castles surfForecast / Okinawa / Japan
48hr Weather and Surf, issued 8 am Wednesday 20 May 2026 JSTForecast update in hr min s Forecast update imminent
Castles surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Castles sea temperature is
23.8° C
(Which is 1.9°C colder than average for this time of year)How big are the waves at Castles today?
The current surf forecast for Castles at 1PM is: 1.4m 10s primary swell from a East-southeast direction and 0.4m 8s secondary swell from a Northeast direction, 0.3m 2s secondary swell from a Southwest direction (forecast issued at 08:00am May 20). The wind direction is predicted to be cross-shore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 May) | 5ft (1.5m) | 9s |
| Afternoon (20 May) | 4.5ft (1.4m) | 10s |
| Evening (20 May) | 4.5ft (1.3m) | 10s |
Table - waves today at Castles. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastModerate rain (total 15mm), heaviest on Fri afternoon. Warm (max 25°C on Thu afternoon, min 23°C on Wed night). Wind will be generally light. | ||||||||||||||||||||||||
Wednesday 20 | Thursday 21 | Friday 22 | Sat 23 | |||||||||||||||||||||
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 | 12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 12 AM | 3 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
ESE 8 | ESE 9 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | |
284 | 307 | 334 | 351 | 305 | 305 | 305 | 248 | 235 | 248 | 248 | 210 | 197 | 197 | 197 | 197 | 193 | 189 | 156 | 153 | 153 | 153 | 153 | 153 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | cross | cross | cross | cross | cross-on | cross-on | cross-on | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross-off | cross-off | cross | cross-on | cross | cross-off | |
High Tide | 8:35AM2.06m | 10:29PM1.75m | 9:24AM1.94m | 11:29PM1.67m | 10:21AM1.79m | 00:33AM1.61m | ||||||||||||||||||
Low Tide | 3:39PM0.01m | 3:44AM1.01m | 4:32PM0.18m | 4:43AM1.05m | 5:31PM0.37m | |||||||||||||||||||
 | | | | |  | | | | | | |  |  |  | | |  | | | | |  | | |
 | 5:41 | — | — | — | — | — | — | 5:39 | — | — | — | — | — | — | — | 5:39 | — | — | — | — | — | — | — | 5:39 |
 | — | — | — | — | 7:09 | — | — | — | — | — | — | — | 7:10 | — | — | — | — | — | — | — | 7:10 | — | — | 7:12 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 2 | 3 | 2 | — | 1 | 3 | |
Temp °C | 23 | 24 | 24 | 24 | 24 | 24 | 24 | 23 | 23 | 24 | 24 | 25 | 25 | 25 | 25 | 24 | 25 | 25 | 25 | 24 | 23 | 24 | 25 | 24 |
26 | 26 | 25 | 25 | 25 | 27 | 26 | 24 | 24 | 25 | 25 | 26 | 27 | 27 | 27 | 26 | 27 | 27 | 28 | 28 | 27 | 27 | 27 | 26 | |
Swell 1 Height (m) Direction Period (s) | ESE 8 | ESE 9 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 |
 kJ | 284 | 307 | 334 | 351 | 305 | 305 | 305 | 248 | 235 | 248 | 248 | 210 | 197 | 197 | 197 | 197 | 193 | 189 | 156 | 153 | 153 | 153 | 153 | 153 |
Swell 2 Height (m) Direction Period (s) | NE 8 | NE 8 | NE 8 | — | — | — | — | — | — | — | — | W 6 | NE 11 | W 7 | W 7 | E 11 | E 11 | E 10 | W 7 | WSW 5 | E 10 | WSW 5 | WSW 5 | NNW 7 |
| kJ | 17 | 17 | 17 | — | — | — | — | — | — | — | — | 1 | 5 | 43 | 1 | 2 | 2 | 2 | 4 | 32 | 2 | 21 | 15 | 21 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | W 6 | W 6 | E 11 | E 11 | W 7 | — | W 7 | E 10 | E 10 | N 7 | NNW 7 | NNW 7 | E 9 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | 2 | 2 | 1 | — | 1 | 2 | 2 | 1 | 5 | 11 | 2 |
Wind waves Height (m) Direction Period (s) | — | — | SW 2 | SW 3 | SW 3 | SW 3 | SW 3 | SSW 3 | S 3 | SW 4 | WSW 4 | WSW 5 | WSW 6 | — | WSW 7 | WSW 6 | WSW 6 | WSW 6 | WSW 4 | — | WSW 5 | — | SW 6 | SW 5 |
| kJ | — | — | 1 | 1 | 1 | 1 | 1 | 3 | 8 | 6 | 10 | 19 | 25 | — | 47 | 60 | 44 | 40 | 19 | — | 27 | — | 8 | 27 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 16 | 94 | 94 | 16 | 16 | 48 | 16 | 16 | 94 | 94 | 94 | 16 | 16 | 16 | 16 | 16 | 16 | 0 | 0 | 16 | 16 | 16 | 16 |
Best forecast wave conditions in Okinawa | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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