Castles surfForecast / Okinawa / Japan

information circle12 Day Weather and Surf, issued 2 pm Friday 11 Jul 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
29.3° 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 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Jul 12) at 6AM. The primary swell is predicted to be 0.4m and 10s 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 4.0m 12s and forecast to arrive on Friday (Jul 18) 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 3.0m 8s period and expected on Monday (Jul 14) at 6AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 6AM (Sat 12th Jul)1.5ft (0.4m) 10s
Best Surf 6AM (Sat 12th Jul)1.5ft (0.4m) 10s
Most Powerful 9PM (Fri 18th Jul)13ft (4.0m) 12s

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

Updates in  hr  min  s Forecast update imminent
Fri
11
Saturday
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
Saturday
19
Sunday
20
Monday
21
Tuesday
22
Wed
23
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Wave Height (m) & direction (?)
0.4
ESE
0.4
ESE
0.4
ESE
0.5
E
0.7
E
0.7
E
0.7
E
0.7
E
0.5
E
0.4
ESE
0.4
ESE
0.9
SW
0.5
ESE
0.4
ESE
0.7
ESE
0.8
ESE
0.9
ESE
0.9
ESE
0.9
ESE
2.1
ESE
3
ESE
3.5
ESE
4.5
ESE
6
ESE
7
E
7.5
E
6.5
ESE
6.5
ESE
6
SSE
4.5
SSE
3.5
SE
2.1
S
2.1
S
2
S
1.8
S
1.6
S
Period(s) (?)1110108989999108101099111091011121313131312111311101111111110
Wave
Graph
(?)Metric surfscale
Energy (?)7675775990987780613133055639011819319520494722123238756812686151171978911972106482262047482174169013811239988664
Wind
(km/h)
25
SSW
25
SW
20
SW
20
SW
15
SW
25
SW
30
WSW
35
SW
40
WSW
25
WNW
20
WNW
15
WNW
15
WNW
5
SW
5
S
10
SSE
20
ESE
20
E
25
ESE
30
E
35
E
35
E
35
E
40
E
35
E
40
E
40
E
35
E
30
E
25
NE
35
NE
45
NE
30
N
25
WNW
40
SSE
35
SE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
crosscrosscrosscrosscrosscrosscross-
off
crosscross-
off
offoffcross-
off
cross-
off
crosscross-
on
oncross-
on
cross-
on
cross-
on
cross-
on
cross-
on
cross-
on
cross-
on
cross-
on
cross-
on
cross-
on
cross-
on
cross-
on
cross-
on
crosscross-
off
crosscross-
off
offcross-
on
on
High Tide
/ height (m)
8:13PM
1.95
7:16AM
2.17
8:47PM
1.98
7:58AM
2.19
9:19PM
1.98
8:42AM
2.16
9:51PM
1.96
9:27AM
2.09
10:23PM
1.94
10:17AM
1.99
10:57PM
1.92
11:14AM
1.85
11:36PM
1.91
12:24PM
1.71
12:21AM
1.90
1:56PM
1.62
1:19AM
1.91
3:41PM
1.61
2:28AM
1.94
5:07PM
1.70
3:42AM
2.00
6:08PM
1.80
4:49AM
2.09
Low Tide
/ height (m)
1:36AM
1.01
2:10PM
0.11
2:15AM
0.95
2:48PM
0.16
2:54AM
0.88
3:26PM
0.26
3:35AM
0.82
4:04PM
0.40
4:20AM
0.77
4:43PM
0.58
5:10AM
0.73
5:24PM
0.78
6:09AM
0.70
6:12PM
0.97
7:20AM
0.65
7:13PM
1.14
8:41AM
0.56
8:32PM
1.25
9:58AM
0.44
9:57PM
1.28
11:04AM
0.29
11:07PM
1.22
12:00PM
0.17
Fri
11
Saturday
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
Saturday
19
Sunday
20
Monday
21
Tuesday
22
Wed
23
Sunrise--5:43--5:45--5:45--5:46--5:46--5:47--5:47--5:48--5:48--5:48--5:48--5:50
Sunset7:23--7:23--7:23--7:23--7:22--7:22--7:22--7:22--7:22--7:22--7:21--7:21--
thunderstorm thunderstorm thunderstorm thunderstorm thunderstorm clearthunderstorm thunderstorm thunderstorm thunderstorm thunderstorm clearclearclearclearclearclearclearthunderstorm clearthunderstorm clearclearclearclearthunderstorm clearclearclearpart cloudthunderstorm thunderstorm thunderstorm thunderstorm thunderstorm thunderstorm
Rain (mm)
21111-35433-------1-1----2----1103342
Temp. °C292929292929292928292829292829292929292929292829292829292829292829292929
Feels °C (?)303232313431313027313131313234323231303129292728292728292830282631323030

Short Range Forecast: Moderate rain (total 18mm), heaviest on Sun afternoon. Warm (max 29°C on Fri afternoon, min 28°C on Fri afternoon). Winds increasing (light winds from the SW on Sat night, strong winds from the SW by Sun night).

Days 3-6 Weather Summary Light rain (total 6mm), mostly falling on Mon afternoon. Warm (max 29°C on Mon afternoon, min 27°C on Mon night). Wind will be generally light.

Days 6-9 Weather Summary Light rain (total 4mm), mostly falling on Thu afternoon. Warm (max 29°C on Thu afternoon, min 28°C on Thu night). Mainly strong winds.

Long Range Forecast: Heavy rain (total 25mm), heaviest during Mon night. Warm (max 29°C on Sun afternoon, min 28°C on Sun night). Winds decreasing (strong winds from the NNE on Mon night, moderate winds from the SW by Tue afternoon).

  • Map Icons:
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  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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 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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