Aha Rivermouth surfForecast / Okinawa / Japan

information circle48hr Weather and Surf, issued 8 am Monday 11 May 2026 JST
Forecast update in hr  min  s Forecast update imminent
Aha Rivermouth surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Aha Rivermouth sea temperature is
23.7° C
(Which is 1.3°C colder than average for this time of year)

How big are the waves at Aha Rivermouth today?

The current surf forecast for Aha Rivermouth at 1PM is: 1.4m 9s primary swell from a East direction and 0.3m 11s secondary swell from a Southeast direction (forecast issued at 08:00am May 11). The wind direction is predicted to be onshore.

Time (JST) & DateWave HeightWave Period
Morning (11 May)4.5ft (1.4m)9s
Afternoon (11 May)4.5ft (1.3m)10s
Evening (11 May)5.5ft (1.7m)9s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Heavy rain (total 83mm), heaviest during Mon morning. Warm (max 23°C on Tue afternoon, min 21°C on Mon morning). Winds decreasing (fresh winds from the ESE on Mon afternoon, calm by Tue night).

Monday
11
Tuesday
12
Wednesday
13
Thu
14
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
12 AM
3 AM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
3
2
2
2
2
2
1
0
0
0
0
0
0
0
Swell
Height Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Wave
Height (m)
Direction
Period (s)
1.5
E
9
1.4
ESE
9
1.4
E
9
1.3
E
10
1.6
E
9
1.7
E
9
1.8
E
9
1.8
ESE
8
1.7
ESE
8
1.6
ESE
8
1.8
ESE
8
1.7
ESE
9
1.4
ESE
9
1.4
ESE
9
1.2
ESE
9
1.2
ESE
10
1.1
E
10
0.8
ESE
11
1.1
E
10
1.1
E
10
1.1
E
10
1.1
E
10
0.9
E
9
0.8
ENE
10
Wave Graph
Metric surfscale
Energy kJ
339
304
325
313
408
455
483
482
422
376
445
408
281
287
248
276
226
146
225
220
214
214
136
125
Wind (km/h)
20
ESE
15
ENE
25
NE
25
NE
35
ESE
30
ESE
25
ESE
20
ESE
20
ESE
20
SE
15
SSE
10
S
5
SSW
5
WSW
10
S
5
W
15
NW
15
N
15
NNE
15
NNE
15
NNE
15
NNE
15
NNE
10
NNE
cross-on
cross-on
on
on
cross-on
cross-on
cross
cross
cross
cross
cross-off
cross-off
off
glassy
cross-off
cross-off
cross
cross-on
cross-on
cross-on
cross-on
cross-on
on
on
High Tide
2:08PM1.34m
3:18AM1.55m
3:32PM1.46m
3:57AM1.65m
4:32PM1.61m
Low Tide
8:35AM0.92m
8:35PM0.63m
9:33AM0.72m
9:36PM0.61m
10:18AM0.51m
10:26PM0.60m
light rain
heavy rain
heavy rain
heavy rain
light rain
rain showers
cloud
cloud
cloud
thunderstorm
thunderstorm
mod rain
thunderstorm
cloud
cloud
part cloud
part cloud
clear
part cloud
part cloud
clear
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:41
5:41
5:41
5:39
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:04
7:04
7:05
7:06
1
19
32
13
2
1
1
4
7
4
Temp °C
22
21
21
22
22
22
22
22
22
22
22
22
23
23
23
23
23
23
23
23
23
23
23
23
22
22
20
21
19
20
21
22
22
22
23
24
25
26
25
26
25
24
24
24
24
24
24
24
Swell 1
Height (m)
Direction
Period (s)
0.4
SE
12
1.4
ESE
9
1.4
E
9
0.3
SE
11
0.3
SE
10
0.2
SSE
10
1.6
ESE
8
1.6
ESE
8
1.7
ESE
9
1.4
ESE
9
1.4
ESE
9
1.2
ESE
9
1.2
ESE
10
1.1
E
10
0.8
ESE
11
1.1
E
10
1.1
E
10
1.1
E
10
1.1
E
10
0.9
E
9
0.8
ENE
10
Energy kJ
36
304
325
19
16
10
376
333
408
281
287
248
276
226
146
225
220
214
214
136
125
Swell 2
Height (m)
Direction
Period (s)
0.2
N
5
0.4
SE
12
0.3
SE
11
0.1
N
6
0.1
N
6
0.1
N
5
0.1
S
11
0.1
S
11
0.1
SE
8
0.1
SE
8
0.1
SE
8
0.1
SE
8
0.2
SSE
8
0.2
SSE
8
0.8
E
10
0.3
SSE
8
0.3
SSE
8
0.3
SSE
8
0.3
SSE
7
0.4
ESE
10
0.6
ESE
9
Energy kJ
2
35
19
1
1
1
2
2
3
3
3
3
7
6
117
13
12
11
11
39
68
Swell 3
Height (m)
Direction
Period (s)
0.1
N
5
0.2
N
5
0.1
N
5
0.2
SSE
8
0.3
SSE
8
0.3
SSE
7
0.3
SSE
7
Energy kJ
1
2
1
6
12
11
11
Wind waves
Height (m)
Direction
Period (s)
1.5
E
9
1.3
E
10
1.6
E
9
1.7
E
9
1.8
E
9
1.8
ESE
8
1.7
ESE
8
1.8
ESE
8
0.3
NNE
3
0.3
NNE
3
Energy kJ
339
313
408
455
483
482
422
445
2
2
Nearest Offshore or Glassy
Rating
(10 max)
1
1
2
1
2
2
2
2
2
2
3
2
2
2
2
2
2
1
2
2
1
1
1
1
Distance (km)
595
595
673
40
44
12
12
595
70
70
0
0
0
0
0
0
3
31
75
94
68
70
66
66
Best forecast wave conditions in Okinawa
Rating
(10 max)
2
2
2
2
3
3
3
2
2
2
2
2
2
2
2
2
1
1
1
2
Best forecast wave conditions in Japan
Rating
(10 max)
1
1
1
2
2
2
2
2
3
3
3
2
2
3
3
2
2
2
2
2
2
2
2
2
Header Global
Rating
(10 max)
6
5
8
6
5
4
5
5
5
5
5
5
9
9
9
9
9
7
5
7
7
6
6
7
  • 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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