Castles surfForecast / Okinawa / Japan

information circle16 Day Weather and Surf, issued 8 pm Friday 10 Apr 2026 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
23.4° C
(Which is normal for this time of year)

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 Saturday (Apr 11) at 12PM. The primary swell is predicted to be 0.8m and 9s 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 17s and forecast to arrive on Saturday (Apr 18) at 3AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 7s period and expected on Saturday (Apr 11) at 3AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+)12PM (Sat 11th Apr)2.5ft (0.8m) 9s
Best Surf 9PM (Wed 15th Apr)8ft (2.4m) 17s
Most Powerful 3AM (Sat 18th Apr)13ft (4.0m) 17s

Table - best surf conditions forecast for Castles over the next 16 days.


Updates in  hr  min  s Forecast update imminent

Short Range Forecast Mostly dry. Warm (max 25°C on Sat morning, min 22°C on Sat night). Wind will be generally light.

Days 3-6 Weather Summary Light rain (total 3mm), mostly falling on Wed morning. Warm (max 24°C on Wed afternoon, min 21°C on Wed night). Wind will be generally light.

Saturday
11
Sunday
12
Monday
13
Tuesday
14
Wednesday
15
Thursday
16
Fri
17
NightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPM
Rating
(10 max)
0
0
1
0
0
0
0
0
0
1
0
1
3
3
4
3
4
4
4
4
5
Swell
Height Map
Wave Height (m) & direction (?)
0.9
ESE
0.8
E
0.9
ESE
1
E
1
E
1
E
1
E
1
ESE
1
ESE
1
ESE
1.2
ESE
1.3
ESE
1.4
ESE
1.7
ESE
2
ESE
2.5
SE
2.5
SE
2.4
SE
2.5
SE
3
SE
3
SE
Period(s) (?)10109111010101011101011131216161615161617
Wave
Graph
(?)Metric surfscale
Energy kJ (?)1601171472512162082082272402312914086798002007340031182736342745625807
Wind
(km/h)
15
SW
15
SW
10
WSW
20
E
10
SE
20
SSW
20
SW
20
SSW
20
SW
15
SW
20
SW
20
W
5
NE
5
W
10
W
15
E
10
NE
10
NNE
15
ENE
15
ENE
15
NE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
crosscrosscross-
off
cross-
on
oncross-
on
crosscrosscrosscrosscrosscross-
off
glassglasscross-
off
cross-
on
crosscross-
off
crosscrosscross
High Tide
/ height (m)
2:27AM
1.28
12:25PM
1.43
3:33AM
1.39
2:27PM
1.46
4:14AM
1.51
3:51PM
1.60
4:48AM
1.65
4:51PM
1.76
5:21AM
1.78
5:42PM
1.91
5:54AM
1.90
6:28PM
2.02
6:27AM
1.99
Low Tide
/ height (m)
6:55AM
1.14
8:14PM
0.56
8:53AM
1.03
9:28PM
0.50
9:59AM
0.82
10:24PM
0.42
10:47AM
0.58
11:10PM
0.36
11:29AM
0.34
11:53PM
0.33
12:10PM
0.12
12:32AM
0.35
12:51PM
-0.04
Saturday
11
Sunday
12
Monday
13
Tuesday
14
Wednesday
15
Thursday
16
Fri
17
Sunrise-6:11--6:09--6:09--6:07--6:07--6:05--6:05-
Sunset--6:50--6:50--6:51--6:51--6:52--6:52--6:52
clear
part cloud
cloud
cloud
part cloud
clear
part cloud
clear
clear
clear
clear
clear
part cloud
rain showers
rain showers
clear
part cloud
part cloud
clear
part cloud
part cloud
Rain (mm)
-------------21------
Temp. °C232525242525242323232323232324232223222323
Feels °C (?)252627262525242324252423262526242424222424
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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Quick surf report for Castles:

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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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