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Surf Forecasts:

Castles surfForecast / Okinawa / Japan

information circle12 Day Weather and Surf, issued 8 pm Tuesday 02 Sep 2025 JST
Forecast update in hr  min  s Forecast update imminent
Castles surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Castles sea temperature is
29.5° C
 (Which is slightly warmer than usual)

Best Forecast Surf Conditions for Castles this week:

The surf forecast for Castles over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Sep 03) at 3AM. The primary swell is predicted to be 0.8m and 9s period with a secondary swell of 0.5m and 8s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Castles in the next 12 days are 1.3m 10s and forecast to arrive on Thursday (Sep 04) at 9AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 8s period and expected on Monday (Sep 08) at 12AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 3AM (Wed 3rd Sep)2.5ft (0.8m) 9s
Best Surf12AM (Thu 4th Sep)4.5ft (1.3m) 8s
Most Powerful 9AM (Thu 4th Sep)4.5ft (1.3m) 10s

Table - best surf conditions forecast for Castles over the next 12 days.

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table

Short Range Forecast Light rain (total 8mm), mostly falling on Thu morning. Warm (max 30°C on Wed afternoon, min 28°C on Tue night). Wind will be generally light.

Days 3-6 Weather Summary Light rain (total 8mm), mostly falling on Fri night. Warm (max 29°C on Sat morning, min 28°C on Fri night). Wind will be generally light.

Wednesday
03
Thursday
04
Friday
05
Saturday
06
Sunday
07
Monday
08
Tue
09
NightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPM
Rating
(10 max)
1
0
0
2
2
2
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.6
E
0.9
ESE
1
ESE
1.3
ESE
1.3
ESE
1.3
ESE
0.7
E
0.7
E
0.7
E
0.8
ESE
1.2
SE
0.7
ESE
0.9
ESE
0.8
ESE
0.8
ESE
0.9
ESE
0.8
ESE
0.5
E
1.2
SE
0.8
S
1.3
SSE
Period(s) (?)988810910998779877710687
Wave
Graph
(?)Metric surfscale
Energy (?)106126137221332273166128113122157154146146166134104103163175237
Wind
(km/h)
15
NNE
15
NNE
20
N
10
NNW
10
NW
10
WNW
5
S
10
SE
20
ESE
20
SE
15
SSE
15
SE
20
SE
15
ESE
20
ESE
15
SE
20
S
20
S
15
S
15
S
15
S
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off		cross-
off		cross-
off		cross-
off		offoffglassoncross-
on		onononononcross-
on		oncross-
on		cross-
on		cross-
on		cross-
on		cross-
on
High Tide
/ height (m)
1:31AM
1.74
5:06PM
1.61
3:18AM
1.80
5:37PM
1.75
4:33AM
1.94
6:07PM
1.89
5:29AM
2.10
6:36PM
2.01
6:18AM
2.24
7:06PM
2.10
7:03AM
2.34
7:36PM
2.16
7:46AM
2.36
Low Tide
/ height (m)
9:37AM
0.68
9:47PM
1.34
10:39AM
0.54
10:52PM
1.17
11:28AM
0.40
11:39PM
0.96
12:10PM
0.30
12:20AM
0.76
12:50PM
0.24
12:58AM
0.56
1:27PM
0.26
1:37AM
0.41
2:04PM
0.33
Wednesday
03
Thursday
04
Friday
05
Saturday
06
Sunday
07
Monday
08
Tue
09
Sunrise-6:09--6:09--6:09--6:09--6:11--6:11--6:11-
Sunset--6:46--6:45--6:45--6:44--6:43--6:42--6:40
thunderstorm
clear
clear
rain showers
thunderstorm
clear
clear
thunderstorm
clear
thunderstorm
part cloud
clear
clear
clear
thunderstorm
thunderstorm
clear
clear
clear
clear
clear
Rain (mm)
3--13--1-4----13-----
Temp. °C282930282930292929282929292929282929282929
Feels °C (?)303132313334353331313232333232313132313232
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder

Eyeball surf reportRecent Eyeball Surf Reports for Okinawa

  1. weather stationWind Update Continuing clean conditions at Castles (light winds from the NNE at Naha Airport 11 km from Castles). 0.6m 7s swell from the SE with a 0.5m 4s local chop from the NNE and a 0.3m 6s windswell from the E. 3 swells combining to make bigger set waves.

    1 hour 43 minutes ago Castles
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1 h 43 min ago

9 km/h
NNE
Clean
Please reload the page to see if there are any updates.

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.

View detailed surf forecast for Castles at:
surf-forecast.com

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 12 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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