Surf Forecasts:
Castles surf forecast from 22 Aug 2026:
- Most powerful swell: Tuesday 25 Aug, 6PM (local time) - 18ft (5.5m), 16s period, E swell with 14,950 kJ wave energy.
Best Forecast Surf Conditions for Castles this week:
The most powerful waves expected at Castles in the next 16 days are 5.5m 16s and forecast to arrive on Tuesday (Aug 25) at 6PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 5.0m 12s period and expected on Thursday (Aug 27) at 6PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 6PM (Tue 25th Aug) | 18ft (5.5m) 16s |
Table - best surf conditions forecast for Castles over the next 16 days.
Short Range ForecastLight rain (total 8mm), mostly falling on Sat afternoon. Warm (max 29°C on Tue morning, min 27°C on Sat night). Mainly fresh winds. | Days 5-7 Weather SummaryHeavy rain (total 195mm), heaviest during Thu morning. Warm (max 29°C on Tue afternoon, min 27°C on Thu morning). Winds increasing (moderate winds from the NNW on Tue afternoon, stormy winds from the SSW by Thu morning). | |||||||||||||||||||
Sat 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | ||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map | ||||||||||||||||||||
Wave Height (m) Direction Period (s) | SE 6 | SSE 6 | SE 10 | SE 5 | ESE 14 | ESE 16 | ESE 15 | ESE 18 | E 17 | E 16 | ENE 15 | ENE 12 | ENE 10 | E 11 | E 13 | E 10 | S 8 | S 8 | ENE 15 | E 8 |
Wave Graph | ||||||||||||||||||||
157 | 103 | 40 | 60 | 115 | 277 | 1256 | 7236 | 12224 | 13029 | 8936 | 500 | 141 | 112 | 123 | 247 | 1075 | 811 | 72 | 58 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-off | cross-off | off | off | cross-off | cross-off | cross | cross-on | on | on | on | on |
High Tide | 4:51PM1.47m | 1:35AM1.72m | 5:34PM1.58m | 3:15AM1.74m | 5:58PM1.69m | 4:26AM1.83m | 6:20PM1.81m | 5:19AM1.96m | 6:43PM1.91m | 6:03AM2.08m | 7:07PM2.00m | 6:44AM2.18m | 7:32PM2.07m | |||||||
Low Tide | 7:37PM1.44m | 9:50AM0.74m | 9:50PM1.41m | 10:46AM0.63m | 10:55PM1.28m | 11:29AM0.51m | 11:39PM1.13m | 12:06PM0.40m | 00:15AM0.96m | 12:41PM0.33m | 00:49AM0.80m | 1:14PM0.30m | 1:23AM0.65m | |||||||
— | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | |
6:59 | — | — | 6:58 | — | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — | — | 6:53 | — | — | 6:52 | — | |
mm | 3 | 2 | — | 1 | 1 | 1 | — | — | — | 1 | 5 | 1 | 2 | 8 | 97 | 66 | 12 | 3 | — | — |
Temp °C | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 29 | 29 | 28 | 29 | 28 | 28 | 27 | 28 | 28 | 29 | 29 | 28 |
Feels °C | 28 | 30 | 29 | 29 | 30 | 30 | 29 | 31 | 32 | 31 | 29 | 26 | 25 | 26 | 18 | 21 | 22 | 29 | 30 | 30 |
Swell 1 Height (m) Direction Period (s) | SW 10 | SW 10 | SW 10 | SW 10 | SW 9 | SW 9 | ESE 15 | ESE 18 | E 17 | E 16 | ENE 15 | ENE 12 | NW 11 | WNW 11 | W 12 | W 12 | WSW 12 | WSW 12 | SW 12 | SSW 9 |
1286 | 687 | 809 | 542 | 402 | 263 | 1256 | 7236 | 12224 | 13029 | 8936 | 500 | 2155 | 2969 | 4177 | 6280 | 5311 | 2322 | 3493 | 702 | |
Swell 2 Height (m) Direction Period (s) | E 9 | ENE 9 | ENE 9 | ESE 13 | ESE 14 | ESE 16 | SW 9 | SW 9 | SW 8 | SW 9 | SSW 9 | NNE 12 | ENE 10 | E 11 | E 13 | E 10 | E 10 | ENE 12 | ENE 12 | W 11 |
42 | 16 | 16 | 60 | 115 | 277 | 193 | 178 | 105 | 75 | 141 | 452 | 141 | 112 | 123 | 247 | 183 | 47 | 47 | 555 | |
Swell 3 Height (m) Direction Period (s) | SE 10 | SE 10 | SE 10 | ENE 9 | S 7 | ESE 13 | ENE 11 | — | — | — | — | ESE 10 | SE 10 | ENE 13 | SE 10 | ENE 18 | ENE 16 | ENE 16 | ENE 15 | E 8 |
25 | 24 | 24 | 25 | 26 | 142 | 66 | — | — | — | — | 10 | 17 | 35 | 17 | 30 | 25 | 24 | 72 | 58 | |
Wind waves Height (m) Direction Period (s) | SE 6 | SSE 6 | SSE 4 | SE 5 | E 5 | E 11 | E 6 | ENE 7 | — | N 5 | NNW 6 | WNW 8 | WSW 8 | SW 8 | SW 10 | SSW 10 | S 8 | S 8 | E 7 | — |
157 | 103 | 40 | 51 | 27 | 240 | 61 | 99 | — | 68 | 279 | 1747 | 1298 | 1599 | 3679 | 2602 | 1075 | 811 | 44 | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 596 | 596 | 28 | 28 | 28 | 28 | 28 | 29 | 5 | 5 | 596 | 776 | 713 | 596 | 759 | 713 | 713 | 806 | 92 | 28 |
Best forecast wave conditions in Okinawa | ||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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Information about the Castles Surf forecast
The above surf forecast table for Castles provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Castles can be found by selecting the local surf guide option on the grey menu. Our Castles surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Castles) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Castles may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Castles is 6 km (4 miles) from the city of Itoman. If you plan a holiday in Okinawa, look for hotels and other accommodation in Itoman. Itoman has rooms for a wide range of budgets as well as car hire and transport links.











