Castles surfForecast / Okinawa / Japan

information circle48hr Weather and Surf, issued 2 am Monday 18 May 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
24.1° C
(Which is 1.5°C colder than average for this time of year)

How big are the waves at Castles today?

The current surf forecast for Castles at 5AM is: 2.1m 9s primary swell from a East direction and 0.1m 12s secondary swell from a Southeast direction (forecast issued at 02:00am May 18). The wind direction is predicted to be cross-onshore.

Time (JST) & DateWave HeightWave Period
Morning (18 May)7ft (2.1m)9s
Afternoon (18 May)7ft (2.1m)9s
Evening (18 May)7ft (2.1m)9s

Table - waves today at Castles. (Swell directed towards the surf break)


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Mostly dry. Warm (max 24°C on Tue morning, min 22°C on Mon morning). Winds decreasing (fresh winds from the ENE on Mon afternoon, light winds from the NW by Tue morning).

Monday
18
Tuesday
19
Wednesday
20
12 AM
3 AM
6 AM
9 AM
12 PM
3 PM
6 PM
9 PM
12 AM
3 AM
6 AM
9 AM
12 PM
3 PM
6 PM
9 PM
12 AM
3 AM
6 AM
9 AM
12 PM
3 PM
6 PM
9 PM
Rating
(10 max)
0
0
0
0
0
0
0
0
1
2
2
2
2
1
2
2
2
1
1
2
0
1
1
0
Swell
Height Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Wave
Height (m)
Direction
Period (s)
2.1
E
8
2.1
E
8
2.1
E
9
2.1
E
9
2.1
E
9
2.1
E
9
2.1
E
9
2.1
E
9
2.1
E
9
2
E
8
1.8
E
8
1.7
E
8
1.7
E
9
1.7
E
9
1.7
E
9
1.6
E
9
1.5
E
9
1.5
E
9
1.4
ESE
9
1.4
ESE
9
1.4
ESE
10
1.4
ESE
10
1.3
ESE
10
1.3
ESE
10
Wave Graph
Metric surfscale
Energy kJ
612
625
640
654
654
670
670
656
641
568
460
411
419
439
450
404
348
355
318
326
334
334
283
283
Wind (km/h)
30
ENE
30
ENE
30
ENE
30
ENE
30
ENE
30
ENE
30
ENE
30
ENE
20
NE
15
NNE
10
NNE
5
NW
15
WNW
20
W
15
WNW
10
WSW
15
WSW
15
SW
15
SW
15
WSW
15
SW
15
SW
15
SSW
10
S
cross-on
cross-on
cross-on
cross-on
cross
cross
cross
cross
cross
cross-off
cross-off
off
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross
cross-off
cross
cross
cross
cross-on
High Tide
7:09AM2.18m
8:43PM1.95m
7:51AM2.14m
9:35PM1.86m
8:35AM2.06m
Low Tide
1:27AM0.78m
2:02PM-0.19m
2:10AM0.85m
2:49PM-0.12m
2:55AM0.93m
3:39PM0.01m
clear
clear
clear
clear
cloud
cloud
cloud
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:41
5:41
5:41
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:08
7:09
7:09
Temp °C
22
22
22
22
22
23
22
22
23
22
22
23
24
24
24
24
24
23
23
23
24
24
24
24
19
19
19
19
19
21
19
20
24
23
24
26
26
25
25
27
26
24
25
25
25
25
25
26
Swell 1
Height (m)
Direction
Period (s)
0.2
ESE
13
0.1
SE
12
0.1
SE
12
2.1
E
9
2
E
8
1.8
E
8
1.7
E
8
1.7
E
9
1.7
E
9
1.7
E
9
1.6
E
9
1.5
E
9
1.5
E
9
1.4
ESE
9
1.4
ESE
9
1.4
ESE
10
1.4
ESE
10
1.3
ESE
10
1.3
ESE
10
Energy kJ
16
6
6
641
568
460
411
419
439
450
404
348
355
318
326
334
334
283
283
Swell 2
Height (m)
Direction
Period (s)
0.4
NE
8
0.6
ESE
10
0.2
ENE
8
Energy kJ
17
71
7
Swell 3
Height (m)
Direction
Period (s)
0.4
NE
8
0.1
W
7
Energy kJ
17
1
Wind waves
Height (m)
Direction
Period (s)
2.1
E
8
2.1
E
8
2.1
E
9
2.1
E
9
2.1
E
9
2.1
E
9
2.1
E
9
2.1
E
9
0.4
NW
3
0.4
WNW
3
0.4
WNW
3
0.4
W
3
0.4
W
3
0.4
W
4
0.4
WSW
3
0.4
SW
3
0.4
SW
3
0.4
SW
3
0.4
SW
3
Energy kJ
612
625
640
654
654
670
670
656
2
3
3
3
4
4
2
2
2
3
3
Nearest Offshore or Glassy
Rating
(10 max)
2
2
2
2
2
2
2
2
1
1
3
2
2
2
2
2
1
1
1
1
1
1
1
1
Distance (km)
29
29
29
29
29
29
29
29
687
63
0
16
16
16
94
48
16
16
16
16
16
16
16
16
Best forecast wave conditions in Okinawa
Rating
(10 max)
2
2
2
2
2
2
2
3
1
3
3
3
2
3
2
2
2
2
2
2
2
2
2
Best forecast wave conditions in Japan
Rating
(10 max)
2
2
2
2
2
2
2
3
1
2
3
3
3
2
3
3
3
4
3
3
3
3
2
2
Header Global
Rating
(10 max)
7
4
8
6
4
4
5
6
5
4
5
4
5
4
4
4
4
4
4
4
4
4
4
4
  • 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

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