Aha Rivermouth surfForecast / Okinawa / Japan

information circle48hr Weather and Surf, issued 2 pm Wednesday 13 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
23.6° C
(Which is 1.5°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 6PM is: 1.0m 9s primary swell from a East direction (forecast issued at 02:00pm May 13). An open ocean swell of 0.3m 8s is not directed at the surf break. The wind direction is predicted to be onshore.

Time (JST) & DateWave HeightWave Period
Morning (13 May)--
Afternoon (13 May)3.5ft (1.1m)10s
Evening (13 May)3.5ft (1.0m)9s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Mostly dry. Warm (max 23°C on Wed afternoon, min 22°C on Wed night). Winds increasing (light winds from the ENE on Wed night, fresh winds from the E by Fri night).

Wed
13
Thursday
14
Friday
15
Sat
16
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
6 AM
9 AM
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
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)
0.8
E
10
1.1
E
10
1
E
9
1
E
9
0.7
ESE
10
0.7
ESE
10
0.7
ESE
10
0.8
ESE
10
0.7
ESE
10
0.8
E
9
0.7
ESE
9
0.7
ESE
9
0.7
ENE
9
0.6
ESE
9
0.6
E
9
1.2
E
5
1.5
E
6
1.6
E
6
1.6
E
6
1.6
E
7
1.6
E
7
1.4
E
7
1.4
E
7
1.5
ENE
7
Wave Graph
Metric surfscale
Energy kJ
122
219
173
173
98
98
98
123
94
113
86
86
92
69
61
70
141
184
202
222
243
203
209
222
Wind (km/h)
10
NE
10
ENE
10
NE
15
ENE
10
ENE
10
E
20
E
15
E
20
ENE
15
E
20
ENE
20
E
20
E
25
ENE
30
ENE
30
ENE
30
E
30
E
35
E
35
E
30
E
30
ENE
30
ENE
30
ENE
on
on
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
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
High Tide
4:32PM1.61m
4:33AM1.75m
5:22PM1.74m
5:08AM1.85m
6:07PM1.83m
5:42AM1.93m
Low Tide
10:18AM0.51m
10:26PM0.60m
10:59AM0.30m
11:10PM0.61m
11:38AM0.11m
11:50PM0.63m
part cloud
clear
part cloud
part cloud
part cloud
part cloud
cloud
cloud
cloud
cloud
cloud
cloud
part cloud
cloud
cloud
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:39
5:39
5:39
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:05
7:06
7:06
7:07
Temp °C
23
23
23
23
22
22
22
22
23
23
22
22
22
22
22
22
22
22
22
22
22
22
22
22
24
24
24
24
23
23
22
22
22
23
21
20
21
20
19
18
18
18
18
18
18
18
19
18
Swell 1
Height (m)
Direction
Period (s)
0.8
E
10
1.1
E
10
1
E
9
1
E
9
0.7
ESE
10
0.7
ESE
10
0.7
ESE
10
0.8
ESE
10
0.7
ESE
10
0.8
E
9
0.7
ESE
9
0.7
ESE
9
0.6
ESE
9
0.6
ESE
9
0.6
E
9
0.5
E
9
0.1
SE
12
0.1
SE
12
0.4
ESE
10
0.1
SE
11
0.1
SE
11
0.4
ENE
9
0.4
ENE
9
0.3
ESE
10
Energy kJ
122
219
173
173
98
98
98
123
94
113
86
86
64
69
61
43
6
5
36
5
5
28
28
20
Swell 2
Height (m)
Direction
Period (s)
0.6
ESE
9
0.3
SSE
8
0.3
SSE
8
0.3
SSE
7
0.6
ENE
9
0.6
ENE
9
0.6
E
9
0.2
SSE
7
0.5
ENE
9
0.3
ENE
9
0.5
E
9
0.4
ENE
9
0.2
SSE
7
0.5
E
9
0.3
ENE
11
0.3
ENE
11
0.1
S
6
0.1
S
6
0.1
S
6
0.1
S
6
0.1
S
6
0.3
ESE
11
0.3
ESE
11
0.1
SE
11
Energy kJ
65
11
11
11
61
59
55
5
46
17
45
29
4
42
23
23
1
1
1
1
1
23
23
5
Swell 3
Height (m)
Direction
Period (s)
0.3
SSE
8
0.3
SSE
8
0.3
SSE
8
0.3
SSE
8
0.3
SSE
7
0.3
SSE
7
0.2
SSE
7
0.3
SSE
7
0.2
SSE
7
0.2
SSE
7
0.2
SSE
7
0.2
SSE
7
0.1
SE
12
0.2
SSE
7
0.2
SSE
6
0.2
S
6
0.1
E
16
0.1
E
16
0.1
SE
11
0.1
SE
16
0.1
E
15
0.1
SE
11
0.2
ESE
11
0.1
SE
15
Energy kJ
13
11
11
11
11
11
5
10
5
5
5
5
6
4
4
3
5
5
5
10
5
5
11
8
Wind waves
Height (m)
Direction
Period (s)
0.3
ENE
3
0.5
ENE
9
0.6
ENE
9
0.3
ENE
3
0.4
ENE
3
0.7
ENE
9
0.7
E
4
0.9
ENE
4
1.2
E
5
1.5
E
6
1.6
E
6
1.6
E
6
1.6
E
7
1.6
E
7
1.4
E
7
1.4
E
7
1.5
ENE
7
Energy kJ
1
46
69
2
3
92
16
31
70
141
184
202
222
243
203
209
222
Nearest Offshore or Glassy
Rating
(10 max)
1
2
1
1
1
1
1
1
1
2
2
2
2
2
2
1
1
2
2
2
2
1
1
1
Distance (km)
66
12
66
12
12
12
60
66
60
595
595
595
595
595
595
595
683
861
595
595
595
68
66
70
Best forecast wave conditions in Okinawa
Rating
(10 max)
1
2
1
1
1
1
1
1
1
1
1
1
Best forecast wave conditions in Japan
Rating
(10 max)
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
1
2
2
2
2
3
3
3
3
Header Global
Rating
(10 max)
9
9
8
8
7
8
9
9
9
9
5
5
5
5
5
5
5
5
5
5
6
5
5
5
  • 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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