Surf Forecasts:
Castles surf forecast from 30 Aug 2026:
- Most powerful swell: Monday 31 Aug, 9PM (local time) - 10ft (3.0m), 9s period, ESE swell with 1,162 kJ wave energy.
Best Forecast Surf Conditions for Castles this week:
The most powerful waves expected at Castles in the next 16 days are 3.0m 9s and forecast to arrive on Monday (Aug 31) 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 3.5m 11s period and expected on Wednesday (Sep 02) at 12PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 9PM (Mon 31st Aug) | 10ft (3.0m) 9s |
Table - best surf conditions forecast for Castles over the next 16 days.
Short Range ForecastHeavy rain (total 28mm), heaviest during Tue night. Warm (max 28°C on Sun morning, min 27°C on Sun night). Winds decreasing (fresh winds from the E on Mon night, light winds from the SE by Tue night). | Days 4-6 Weather SummaryHeavy rain (total 42mm), heaviest during Wed night. Warm (max 28°C on Wed night, min 27°C on Wed morning). Winds decreasing (strong winds from the SE on Wed night, moderate winds from the E by Fri night). | ||||||||||||||||||||
Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | |||||||||||||||
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) | S 8 | S 8 | ESE 7 | ESE 7 | ESE 9 | ESE 9 | E 8 | E 8 | E 9 | E 9 | E 9 | E 9 | S 7 | E 8 | E 8 | S 10 | ESE 6 | S 9 | S 8 | S 8 | ESE 14 |
Wave Graph | |||||||||||||||||||||
169 | 173 | 167 | 238 | 791 | 1155 | 617 | 505 | 429 | 606 | 390 | 340 | 434 | 94 | 119 | 1039 | 55 | 372 | 279 | 161 | 653 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | on | on | on | on | on | on | on | cross-on | cross-on | cross-on | cross |
High Tide | 8:23PM2.14m | 8:40AM2.21m | 8:49PM2.14m | 9:20AM2.11m | 9:16PM2.13m | 10:04AM1.96m | 9:46PM2.09m | 10:55AM1.77m | 10:20PM2.03m | 12:05PM1.60m | 11:05PM1.95m | 2:04PM1.50m | 00:17AM1.86m | ||||||||
Low Tide | 2:19PM0.40m | 2:31AM0.44m | 2:51PM0.53m | 3:08AM0.40m | 3:21PM0.69m | 3:47AM0.40m | 3:52PM0.86m | 4:32AM0.44m | 4:24PM1.04m | 5:28AM0.52m | 5:02PM1.21m | 6:45AM0.61m | 6:09PM1.35m | ||||||||
6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | |
— | 6:51 | — | — | 6:50 | — | — | 6:49 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — | |
mm | 1 | — | — | — | 1 | 6 | 3 | 5 | 12 | 6 | 5 | 20 | 5 | 1 | 4 | 1 | — | — | — | — | — |
Temp °C | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 28 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 28 | 27 | 28 | 28 | 27 |
Feels °C | 31 | 30 | 27 | 27 | 27 | 26 | 29 | 29 | 32 | 27 | 28 | 28 | 27 | 28 | 29 | 30 | 30 | 28 | 31 | 30 | 29 |
Swell 1 Height (m) Direction Period (s) | S 8 | S 8 | SSW 8 | SSW 9 | SSW 8 | SW 9 | E 8 | SW 11 | SW 12 | SSW 11 | E 9 | E 9 | SW 12 | E 8 | SSW 11 | SW 11 | SW 10 | SW 9 | SW 9 | S 8 | ESE 14 |
169 | 173 | 90 | 123 | 94 | 70 | 617 | 647 | 1943 | 2513 | 390 | 335 | 1504 | 94 | 2817 | 453 | 192 | 135 | 109 | 161 | 653 | |
Swell 2 Height (m) Direction Period (s) | SW 9 | SW 9 | SW 9 | SW 9 | SW 9 | SSW 8 | SW 10 | S 8 | E 9 | E 9 | ENE 12 | E 9 | E 8 | E 11 | E 8 | W 9 | ESE 6 | E 10 | ENE 10 | SW 8 | S 8 |
168 | 91 | 95 | 99 | 81 | 38 | 226 | 46 | 429 | 606 | 50 | 340 | 129 | 58 | 119 | 81 | 55 | 153 | 98 | 84 | 163 | |
Swell 3 Height (m) Direction Period (s) | ENE 12 | ENE 12 | ENE 11 | ENE 11 | — | S 8 | SSW 8 | E 15 | ENE 14 | — | — | — | E 11 | E 16 | E 15 | E 10 | W 8 | WNW 7 | WNW 6 | E 10 | E 10 |
82 | 79 | 73 | 68 | — | 12 | 38 | 18 | 37 | — | — | — | 61 | 5 | 4 | 51 | 65 | 16 | 8 | 92 | 88 | |
Wind waves Height (m) Direction Period (s) | ESE 7 | ESE 7 | ESE 7 | ESE 7 | ESE 9 | ESE 9 | — | E 8 | — | — | SSW 11 | SSW 11 | S 7 | SSW 12 | — | S 10 | SSW 10 | S 9 | S 8 | ESE 7 | E 7 |
128 | 132 | 167 | 238 | 791 | 1155 | — | 505 | — | — | 3011 | 2423 | 434 | 3449 | — | 1039 | 696 | 372 | 279 | 31 | 27 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 28 | 28 | 28 | 31 | 1029 | 772 | 28 | 713 | 28 | 608 | 17 | 588 | 596 | 596 | 28 | 28 | 28 | 28 | 28 | 29 | 29 |
Best forecast wave conditions in Okinawa | |||||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
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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.











