Aha Rivermouth Surf Break

Lat Long: 26.72° N 128.30° E

Aha Rivermouth Surf Forecast and Surf Report

Issued: 8 pm 19 Aug 2026 (local time)

Forecast update in  hr  min

Today's Aha Rivermouth sea temperature is
28.5° C
0.2° 

Aha Rivermouth surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Aha Rivermouth surf forecast from 19 Aug 2026:

  • Most powerful swell: Tuesday 25 Aug, 12PM (local time) - 10ft (3.0m), 15s period, E swell with 4,185 kJ wave energy.

Best Forecast Surf Conditions for Aha Rivermouth this week:

The most powerful waves expected at Aha Rivermouth in the next 16 days are 3.0m 15s and forecast to arrive on Tuesday (Aug 25) at 12PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.5m 11s period and expected on Saturday (Aug 22) at 9AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful12PM (Tue 25th Aug)10ft (3.0m) 15s

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


Short Range Forecast

Heavy rain (total 20mm), heaviest during Wed night. Warm (max 28°C on Wed night, min 27°C on Thu night). Winds increasing (moderate winds from the SE on Wed night, strong winds from the ESE by Thu night).

Days 5-7 Weather Summary

Heavy rain (total 27mm), heaviest during Mon afternoon. Warm (max 28°C on Sat night, min 27°C on Sat night). Mainly strong winds.

Thursday
20
Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.9
ESE
8
1.6
ESE
8
1.7
SE
9
1.8
ESE
6
2.1
SE
7
2.3
SE
7
3
SE
9
3.5
SSE
11
3
SSE
10
1.7
ESE
6
1.8
E
7
1.7
E
6
0.9
ESE
14
1.6
ESE
16
1.8
E
16
2.3
E
16
3
E
15
3
E
15
2.5
E
14
Wave Graph
Metric surfscale
Energy kJ
397
287
427
265
440
585
1165
0
0
253
280
233
297
1256
1735
2768
3650
3430
2614
Wind (km/h)
30
ESE
30
ESE
30
ESE
50
ESE
50
SE
45
SE
40
ESE
40
ESE
40
ESE
40
E
40
ESE
35
E
40
E
40
E
35
E
35
E
30
E
25
ESE
20
E
Wind State
cross
cross
cross
cross
cross
cross
cross
cross
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
High Tide
10:27PM1.82m
11:35AM1.41m
10:59PM1.71m
1:42PM1.30m
11:43PM1.60m
5:29PM1.41m
1:28AM1.52m
5:43PM1.53m
3:31AM1.54m
6:01PM1.65m
4:36AM1.64m
6:20PM1.74m
Low Tide
5:24AM0.74m
4:36PM1.10m
6:35AM0.81m
4:55PM1.26m
8:22AM0.83m
7:56PM1.39m
9:56AM0.75m
10:37PM1.33m
10:52AM0.63m
11:23PM1.21m
11:30AM0.52m
11:53PM1.09m
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
clear
clear
thunderstorm
thunderstorm
clear
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
part cloud
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:00
6:00
6:01
6:01
6:01
6:01
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:00
6:59
6:59
6:58
6:57
6:55
6:54
 mm
5
2
2
1
4
2
4
5
3
4
4
4
3
4
1
Temp °C
28
28
28
27
27
28
28
28
28
28
27
28
27
27
28
28
27
27
28
Feels °C
29
29
29
27
24
25
26
26
27
27
25
27
26
25
28
27
27
28
30
  • 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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Information about the Aha Rivermouth Surf forecast

The above surf forecast table for Aha Rivermouth provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Aha Rivermouth can be found by selecting the local surf guide option on the grey menu. Our Aha Rivermouth 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 (Aha Rivermouth) 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 Aha Rivermouth 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.

Aha Rivermouth is 31 km (19 miles) from the city of Okinawa. If you plan a holiday in Okinawa, look for hotels and other accommodation in Okinawa. Okinawa has rooms for a wide range of budgets as well as car hire and transport links.

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