Surf Forecasts:
Castles surf forecast from 10 Jul 2026:
- Best quality surf: Friday 10 Jul, 12PM (local time) - 30ft (9.0m), 18s period, SE swell with cross-onshore winds.
- Most powerful swell: Saturday 11 Jul, 6AM (local time) - 44ft (13.5m), 18s period, SSE swell with 107,517 kJ wave energy.
- Next surfable swell (1★+): Friday 10 Jul, 12PM (local time) - 30ft (9.0m), 18s period with SE swell.
Best Forecast Surf Conditions for Castles this week:
The surf forecast for Castles over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Jul 10) at 12PM. The primary swell is predicted to be 9.0m and 18s period. The wind is predicted to be cross-onshore as the swell arrives.
The most powerful waves expected at Castles in the next 16 days are 13.5m 18s and forecast to arrive on Saturday (Jul 11) at 6AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 5.5m 14s period and expected on Saturday (Jul 11) at 6PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12PM (Fri 10th Jul) | 30ft (9.0m) 18s |
| Best Surf | 12PM (Fri 10th Jul) | 30ft (9.0m) 18s |
| Most Powerful | 6AM (Sat 11th Jul) | 44ft (13.5m) 18s |
Table - best surf conditions forecast for Castles over the next 16 days.
Short Range ForecastHeavy rain (total 35mm), heaviest during Fri night. Warm (max 29°C on Fri night, min 28°C on Fri morning). Winds decreasing (stormy winds from the SE on Fri night, fresh winds from the SE by Sun night). | Days 4-6 Weather SummaryLight rain (total 3mm), mostly falling on Tue afternoon. Warm (max 30°C on Wed afternoon, min 28°C on Mon night). Winds decreasing (fresh winds from the SSE on Mon morning, calm by Wed night). | ||||||||||||||||||||
Friday 10 | Saturday 11 | Sunday 12 | Monday 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | |||||||||||||||
AM | 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 17 | SE 17 | SSE 17 | S 17 | S 15 | SSE 12 | SSE 12 | SSE 11 | S 10 | SSE 9 | SSE 9 | SSE 7 | SSE 8 | SSE 7 | S 8 | S 8 | S 7 | S 7 | S 7 | S 8 | SE 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 42399 | 55405 | 92282 | 102280 | 44334 | 7478 | 3734 | 2454 | 1357 | 603 | 537 | 249 | 237 | 183 | 193 | 186 | 183 | 152 | 184 | 213 | 62 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | on | on | on | on | on | on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | glassy | cross-on | cross-on |
High Tide | 3:50PM1.64m | 2:51AM1.98m | 5:09PM1.73m | 3:59AM2.07m | 6:10PM1.85m | 5:02AM2.16m | 7:01PM1.95m | 6:00AM2.25m | 7:45PM2.02m | 6:55AM2.31m | 8:26PM2.06m | 7:46AM2.31m | 9:05PM2.06m | ||||||||
Low Tide | 8:54PM1.18m | 10:12AM0.36m | 10:12PM1.19m | 11:15AM0.20m | 11:19PM1.14m | 12:10PM0.07m | 00:16AM1.06m | 1:01PM-0.01m | 1:06AM0.96m | 1:47PM-0.02m | 1:54AM0.87m | 2:31PM0.04m | 2:40AM0.79m | ||||||||
 | |  |  | |  |  |  | |  | | | | | | | |  | | |  | |
 | 5:43 | — | — | 5:43 | — | — | 5:43 | — | — | 5:45 | — | — | 5:45 | — | — | 5:46 | — | — | 5:46 | — | — |
 | — | 7:23 | — | — | 7:23 | — | — | 7:23 | — | — | 7:23 | — | — | 7:23 | — | — | 7:22 | — | — | 7:22 | — |
mm | 3 | 5 | 14 | 7 | 5 | — | — | — | 1 | — | — | — | — | 1 | 1 | — | 1 | — | — | 1 | 2 |
Temp °C | 28 | 28 | 29 | 28 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 28 | 29 | 30 | 29 | 29 | 29 | 28 |
Feels °C | 23 | 22 | 20 | 18 | 24 | 25 | 28 | 30 | 30 | 30 | 30 | 31 | 32 | 32 | 31 | 33 | 34 | 33 | 34 | 33 | 31 |
Swell 1 Height (m) Direction Period (s) | SE 17 | — | — | — | — | SW 13 | SW 13 | WSW 12 | WSW 10 | SSW 10 | SSW 9 | SSW 9 | SSW 8 | SSW 8 | SW 10 | SW 10 | SW 10 | S 7 | SW 10 | S 8 | SSW 8 |
| kJ | 42399 | — | — | — | — | 6926 | 4527 | 1580 | 576 | 275 | 203 | 147 | 108 | 76 | 77 | 79 | 79 | 152 | 77 | 213 | 130 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | W 12 | W 10 | SW 10 | SW 10 | SW 9 | SW 9 | SW 10 | ENE 9 | ENE 9 | ENE 9 | SW 10 | E 10 | SW 10 | SW 10 |
| kJ | — | — | — | — | — | — | — | 134 | 102 | 281 | 150 | 97 | 103 | 73 | 28 | 27 | 27 | 79 | 47 | 76 | 76 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | ESE 13 | SE 13 | E 9 | E 9 | E 9 | ENE 9 | ENE 9 | SE 12 | SE 11 | SE 11 | E 9 | ESE 9 | E 10 | E 10 |
| kJ | — | — | — | — | — | — | — | 17 | 7 | 15 | 15 | 15 | 16 | 28 | 21 | 19 | 29 | 41 | 16 | 50 | 44 |
Wind waves Height (m) Direction Period (s) | — | SE 17 | SSE 17 | S 17 | S 15 | SSE 12 | SSE 12 | SSE 11 | S 10 | SSE 9 | SSE 9 | SSE 7 | SSE 8 | SSE 7 | S 8 | S 8 | S 7 | — | S 7 | — | SE 6 |
| kJ | — | 55405 | 92282 | 102280 | 44334 | 7478 | 3734 | 2454 | 1357 | 603 | 537 | 249 | 237 | 183 | 193 | 186 | 183 | — | 184 | — | 62 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 776 | 841 | 776 | 713 | 1029 | 605 | 605 | 605 | 605 | 92 | 42 | 612 | 28 | 28 | 28 | 28 | 605 | 28 | 0 | 5 | 5 |
Best forecast wave conditions in Okinawa | |||||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Castles surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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.
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