Surf Forecasts:
Castles surf forecast from 20 Oct 2026:
- Best quality surf: Wednesday 21 Oct, 3PM (local time) - 16ft (5.0m), 17s period, SE swell with cross-shore winds.
- Most powerful swell: Thursday 22 Oct, 12AM (local time) - 23ft (7.0m), 18s period, SE swell with 28,253 kJ wave energy.
- Next surfable swell (1★+): Wednesday 21 Oct, 3PM (local time) - 16ft (5.0m), 17s 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 Wednesday (Oct 21) at 3PM. The primary swell is predicted to be 5.0m and 17s period. The wind is predicted to be cross-shore as the swell arrives.
The most powerful waves expected at Castles in the next 16 days are 7.0m 18s and forecast to arrive on Thursday (Oct 22) at 12AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 6.0m 16s period and expected on Friday (Oct 23) at 9PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3PM (Wed 21st Oct) | 16ft (5.0m) 17s |
| Best Surf | 3PM (Wed 21st Oct) | 16ft (5.0m) 17s |
| Most Powerful | 12AM (Thu 22nd Oct) | 23ft (7.0m) 18s |
Table - best surf conditions forecast for Castles over the next 16 days.
Short Range ForecastHeavy rain (total 38mm), heaviest during Wed night. Warm (max 27°C on Tue morning, min 25°C on Wed night). Winds increasing (light winds from the ENE on Tue morning, near gales from the NE by Wed night). | Days 4-6 Weather SummaryLight rain (total 7mm), mostly falling on Fri night. Warm (max 28°C on Fri morning, min 26°C on Sat night). Winds decreasing (strong winds from the ESE on Fri morning, moderate winds from the ESE by Sun afternoon). | ||||||||||||||||||||
Tuesday 20 | Wednesday 21 | Thursday 22 | Friday 23 | Saturday 24 | Sunday 25 | Monday 26 | |||||||||||||||
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) | ESE 14 | ESE 13 | ESE 15 | SE 17 | SE 17 | SE 18 | SSE 17 | SSE 16 | SSE 16 | SSE 16 | S 16 | S 15 | ESE 9 | S 12 | SE 9 | S 9 | ESE 9 | ESE 9 | ESE 9 | ESE 10 | ESE 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1797 | 1734 | 4230 | 9887 | 15170 | 28253 | 22747 | 20244 | 19583 | 23296 | 25068 | 15783 | 947 | 5318 | 796 | 398 | 311 | 388 | 666 | 838 | 756 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross | cross | cross | cross | cross | cross | cross-on | cross-on | on | on | on | on | on | cross-on | cross-on | cross-on | on | on | on |
High Tide | 3:10PM1.53m | 2:02AM1.55m | 3:51PM1.64m | 3:30AM1.65m | 4:25PM1.76m | 4:32AM1.80m | 4:57PM1.88m | 5:23AM1.95m | 5:30PM2.00m | 6:09AM2.06m | 6:03PM2.10m | 6:54AM2.12m | 6:36PM2.16m | ||||||||
Low Tide | 8:35PM1.19m | 9:01AM0.72m | 9:42PM0.99m | 9:59AM0.66m | 10:29PM0.76m | 10:46AM0.60m | 11:10PM0.52m | 11:29AM0.56m | 11:50PM0.30m | 12:09PM0.56m | 00:30AM0.11m | 12:47PM0.60m | 1:11AM-0.01m | ||||||||
 | |  | |  |  |  | | | |  | | | | | | | | | |  | |
 | 6:30 | — | — | 6:30 | — | — | 6:31 | — | — | 6:31 | — | — | 6:31 | — | — | 6:33 | — | — | 6:33 | — | — |
 | — | 5:57 | — | — | 5:55 | — | — | 5:54 | — | — | 5:54 | — | — | 5:53 | — | — | 5:52 | — | — | 5:52 | — |
mm | — | — | — | — | 2 | 15 | 9 | 2 | 10 | 1 | — | 2 | 1 | 2 | — | — | — | 1 | — | — | — |
Temp °C | 27 | 27 | 26 | 27 | 27 | 26 | 25 | 26 | 27 | 28 | 28 | 27 | 27 | 27 | 26 | 27 | 27 | 27 | 26 | 26 | 26 |
Feels °C | 30 | 29 | 27 | 28 | 26 | 23 | 21 | 23 | 24 | 27 | 28 | 26 | 26 | 27 | 27 | 29 | 29 | 29 | 27 | 26 | 28 |
Swell 1 Height (m) Direction Period (s) | ESE 14 | ESE 13 | ESE 15 | SE 17 | SE 17 | SE 18 | SSE 17 | SSE 16 | SSE 16 | SSE 16 | S 16 | S 15 | SSW 14 | SSW 12 | SW 12 | S 9 | S 8 | S 8 | S 8 | S 7 | ESE 10 |
| kJ | 1797 | 1734 | 4230 | 9887 | 15170 | 28253 | 22747 | 20244 | 19583 | 23296 | 25068 | 15783 | 7129 | 4011 | 1209 | 398 | 235 | 105 | 55 | 26 | 756 |
Swell 2 Height (m) Direction Period (s) | ENE 9 | SE 18 | — | — | — | — | NNW 9 | — | NNW 9 | N 9 | — | NE 8 | — | — | SSW 10 | SW 11 | SW 10 | SW 9 | SW 8 | SW 8 | S 7 |
| kJ | 154 | 702 | — | — | — | — | 129 | — | 108 | 96 | — | 64 | — | — | 400 | 375 | 188 | 61 | 16 | 9 | 15 |
Swell 3 Height (m) Direction Period (s) | SE 19 | ENE 9 | — | — | — | — | — | — | — | — | — | — | — | — | NE 11 | NE 10 | ENE 9 | ENE 9 | ENE 9 | — | WSW 7 |
| kJ | 234 | 116 | — | — | — | — | — | — | — | — | — | — | — | — | 5 | 50 | 59 | 31 | 30 | — | 5 |
Wind waves Height (m) Direction Period (s) | — | — | ENE 9 | ENE 9 | — | NE 7 | NE 8 | NE 8 | — | — | — | ESE 9 | ESE 9 | S 12 | SE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 10 | — |
| kJ | — | — | 266 | 149 | — | 681 | 976 | 755 | — | — | — | 1422 | 947 | 5318 | 796 | 358 | 311 | 388 | 666 | 838 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 5 | 17 | 28 | 29 | 719 | 688 | 687 | 776 | 772 | 776 | 776 | 687 | 687 | 687 | 28 | 28 | 28 | 28 | 28 | 588 | 588 |
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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