Surf Forecasts:
Castles surf forecast from 20 Jul 2026:
- Best quality surf: Tuesday 21 Jul, 3AM (local time) - 1.5ft (0.5m), 10s period, E swell with cross-offshore winds.
- Most powerful swell: Monday 27 Jul, 9PM (local time) - 13ft (4.0m), 13s period, S swell with 5,975 kJ wave energy.
- Next surfable swell (1★+): Tuesday 21 Jul, 3AM (local time) - 1.5ft (0.5m), 10s period with E 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 Tuesday (Jul 21) at 3AM. The primary swell is predicted to be 0.5m and 10s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Castles in the next 16 days are 4.0m 13s and forecast to arrive on Monday (Jul 27) at 9PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 7s period and expected on Monday (Jul 20) at 9PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Tue 21st Jul) | 1.5ft (0.5m) 10s |
| Best Surf | 3AM (Tue 21st Jul) | 1.5ft (0.5m) 10s |
| Most Powerful | 9PM (Mon 27th Jul) | 13ft (4.0m) 13s |
Table - best surf conditions forecast for Castles over the next 16 days.
Short Range ForecastMostly dry. Warm (max 29°C on Mon afternoon, min 27°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 8mm), mostly falling on Sun morning. Warm (max 29°C on Fri afternoon, min 27°C on Thu night). Winds increasing (calm on Thu afternoon, fresh winds from the ESE by Sun morning). | |||||||||||||||||||
Mon 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | ||||||||||||||
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) | ENE 9 | E 10 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | NE 13 | ENE 11 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | SE 10 | SE 10 | SE 10 | SE 11 | SSE 12 |
Wave Graph  | ||||||||||||||||||||
 kJ | 29 | 46 | 48 | 47 | 47 | 46 | 42 | 49 | 92 | 90 | 77 | 77 | 75 | 75 | 51 | 290 | 852 | 1047 | 1882 | 3097 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-off | cross-off | cross | cross-on | cross-off | cross | cross-on | glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on |
High Tide | 11:26PM1.90m | 12:02PM1.66m | 00:02AM1.86m | 1:19PM1.52m | 00:44AM1.82m | 3:04PM1.46m | 1:38AM1.80m | 4:45PM1.51m | 2:43AM1.80m | 5:45PM1.60m | 3:47AM1.84m | 6:23PM1.70m | ||||||||
Low Tide | 5:09PM0.77m | 5:52AM0.76m | 5:46PM0.97m | 6:54AM0.78m | 6:28PM1.14m | 8:06AM0.77m | 7:24PM1.28m | 9:21AM0.71m | 8:47PM1.35m | 10:24AM0.62m | 10:10PM1.35m | 11:14AM0.51m | 11:10PM1.29m | |||||||
 |  | | |  | |  | | | | | | | | | |  |  | | | |
 | — | — | 5:48 | — | — | 5:48 | — | — | 5:50 | — | — | 5:50 | — | — | 5:50 | — | — | 5:50 | — | — |
 | 7:22 | — | — | 7:21 | — | — | 7:21 | — | — | 7:21 | — | — | 7:20 | — | — | 7:20 | — | — | 7:19 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 4 | 4 | 3 | 6 |
Temp °C | 29 | 29 | 28 | 28 | 28 | 29 | 29 | 28 | 28 | 28 | 28 | 28 | 29 | 28 | 28 | 29 | 28 | 28 | 28 | 27 |
Feels °C | 32 | 32 | 31 | 31 | 33 | 32 | 32 | 33 | 33 | 32 | 33 | 32 | 34 | 32 | 31 | 31 | 30 | 29 | 29 | 27 |
Swell 1 Height (m) Direction Period (s) | SW 7 | SW 7 | SW 7 | SW 7 | SW 6 | SW 6 | WSW 6 | ENE 11 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | SE 10 | SE 10 | SE 15 | — | SSE 12 |
| kJ | 99 | 67 | 57 | 38 | 42 | 42 | 26 | 49 | 92 | 90 | 77 | 77 | 75 | 75 | 51 | 290 | 852 | 34 | — | 3097 |
Swell 2 Height (m) Direction Period (s) | ENE 9 | E 10 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | E 9 | SW 7 | SW 7 | SW 7 | SW 7 | S 8 | S 8 | SE 11 | SE 8 | ENE 9 | ENE 9 | SW 7 | — | ENE 9 |
| kJ | 29 | 46 | 48 | 47 | 47 | 46 | 41 | 23 | 18 | 14 | 13 | 10 | 10 | 30 | 31 | 34 | 32 | 2 | — | 15 |
Swell 3 Height (m) Direction Period (s) | W 7 | W 6 | W 8 | W 7 | W 6 | ENE 13 | NE 13 | ENE 8 | SE 10 | SE 10 | SE 10 | SE 9 | SE 9 | S 8 | S 8 | SE 16 | SE 15 | — | — | — |
| kJ | 15 | 12 | 20 | 16 | 7 | 17 | 42 | 22 | 16 | 15 | 15 | 13 | 13 | 10 | 12 | 40 | 35 | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | ENE 3 | E 3 | — | SE 10 | SE 10 | SE 11 | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — | 589 | 1047 | 1882 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 92 | 105 | 23 | 105 | 105 | 92 | 0 | 92 | 23 | 0 | 17 | 92 | 92 | 688 | 688 | 28 | 28 | 28 | 28 | 28 |
Best forecast wave conditions in Okinawa | ||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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FREE! Surf-Forecast.com widget for your website
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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