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Castles surfForecast / Okinawa / Japan
48hr Weather and Surf, issued 8 am Thursday 21 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 3PM is: 1.0m 10s primary swell from a East-southeast direction (forecast issued at 08:00am May 21). An open ocean swell of 0.5m 5s is not directed at the surf break. The wind direction is predicted to be cross-shore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 May) | 4ft (1.2m) | 10s |
| Afternoon (21 May) | 3.5ft (1.0m) | 10s |
| Evening (21 May) | 3.5ft (1.0m) | 10s |
Table - waves today at Castles. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 33mm), heaviest during Fri night. Warm (max 27°C on Sat night, min 23°C on Fri afternoon). Wind will be generally light. | ||||||||||||||||||||||||
Thursday 21 | Friday 22 | Saturday 23 | Sun 24 | |||||||||||||||||||||
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 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 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | |
264 | 264 | 248 | 197 | 197 | 197 | 197 | 197 | 193 | 189 | 189 | 153 | 153 | 153 | 153 | 144 | 144 | 153 | 153 | 149 | 141 | 149 | 113 | 121 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross-on | cross-on | cross | cross-off | cross | cross | cross | cross | cross | cross | |
High Tide | 9:24AM1.94m | 11:29PM1.67m | 10:21AM1.79m | 00:33AM1.61m | 11:37AM1.65m | 1:37AM1.60m | ||||||||||||||||||
Low Tide | 3:44AM1.01m | 4:32PM0.18m | 4:43AM1.05m | 5:31PM0.37m | 5:55AM1.06m | 6:37PM0.55m | ||||||||||||||||||
 | | | | |  |  | |  |  | | | |  | | |  | | | | |  | | | |
 | 5:39 | — | — | — | — | — | — | 5:39 | — | — | — | — | — | — | — | 5:39 | — | — | — | — | — | — | — | 5:39 |
 | — | — | — | — | 7:10 | — | — | — | — | — | — | — | 7:10 | — | — | — | — | — | — | — | 7:12 | — | — | 7:12 |
— | — | — | — | — | — | — | — | — | 1 | — | 4 | 4 | 5 | 3 | 1 | 4 | 3 | 2 | 2 | 3 | 1 | — | — | |
Temp °C | 23 | 24 | 24 | 24 | 25 | 25 | 25 | 24 | 25 | 25 | 25 | 24 | 23 | 23 | 24 | 24 | 25 | 24 | 24 | 25 | 26 | 26 | 27 | 26 |
24 | 25 | 25 | 26 | 27 | 27 | 27 | 26 | 27 | 27 | 27 | 26 | 25 | 25 | 26 | 25 | 26 | 24 | 27 | 27 | 28 | 28 | 29 | 28 | |
Swell 1 Height (m) Direction Period (s) | 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 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 |
 kJ | 264 | 264 | 248 | 197 | 197 | 197 | 197 | 197 | 193 | 189 | 189 | 153 | 153 | 153 | 153 | 144 | 144 | 153 | 153 | 149 | 141 | 149 | 113 | 121 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | NE 11 | W 6 | W 6 | E 11 | E 11 | E 10 | E 10 | E 10 | W 8 | E 10 | W 6 | WNW 6 | — | N 9 | NNW 8 | NNW 8 | NNW 8 | W 6 | NNW 7 | NNW 7 |
| kJ | — | — | — | — | 5 | 27 | 41 | 2 | 2 | 2 | 2 | 2 | 1 | 2 | 30 | 13 | — | 2 | 7 | 6 | 6 | 30 | 5 | 5 |
Swell 3 Height (m) Direction Period (s) | W 7 | — | — | W 6 | W 6 | E 11 | W 7 | — | W 7 | W 7 | — | W 7 | E 10 | NE 10 | E 10 | E 9 | — | N 6 | — | — | NNW 8 | NNW 7 | N 8 | N 8 |
| kJ | 1 | — | — | 1 | 1 | 2 | 1 | — | 1 | 1 | — | 1 | 2 | 4 | 2 | 2 | — | 1 | — | — | 12 | 5 | 1 | 1 |
Wind waves Height (m) Direction Period (s) | — | SSW 3 | WSW 4 | WSW 5 | W 5 | — | — | WSW 6 | WSW 6 | WSW 6 | WSW 6 | WSW 5 | WSW 4 | WSW 4 | S 3 | SSW 4 | SW 4 | WSW 5 | WSW 6 | WSW 5 | WSW 5 | SSW 5 | WSW 6 | WSW 6 |
| kJ | — | 3 | 6 | 13 | 20 | — | — | 41 | 40 | 27 | 28 | 21 | 17 | 17 | 5 | 16 | 29 | 44 | 69 | 55 | 46 | 12 | 57 | 51 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 588 | 588 | 94 | 94 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 94 | 588 | 105 | 48 | 16 | 16 | 16 | 16 | 16 | 16 |
Best forecast wave conditions in Okinawa | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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