Aha Rivermouth Surf Break

Lat Long: 26.72° N 128.30° E

Aha Rivermouth Surf Forecast and Surf Report

Issued: 8 am 07 Aug 2026 (local time)

Forecast update in  hr  min

Today's Aha Rivermouth sea temperature is
30.1° C
1.3° 

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 7 Aug 2026:

  • Best quality surf: Wednesday 12 Aug, 12AM (local time) - 3ft (0.9m), 11s period, ENE swell with offshore winds.
  • Most powerful swell: Friday 7 Aug, 12PM (local time) - 10ft (3.0m), 13s period, ENE swell with 3,118 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 12 Aug, 12AM (local time) - 3ft (0.9m), 11s period with ENE swell.

Best Forecast Surf Conditions for Aha Rivermouth this week:

The surf forecast for Aha Rivermouth over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Aug 12) at 12AM. The primary swell is predicted to be 0.9m and 11s period with a secondary swell of 0.9m and 4s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Aha Rivermouth in the next 16 days are 3.0m 13s and forecast to arrive on Friday (Aug 07) at 12PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 6.5m 11s period and expected on Saturday (Aug 08) at 6AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+)12AM (Wed 12th Aug)3ft (0.9m) 11s
Best Surf12AM (Wed 12th Aug)3ft (0.9m) 11s
Most Powerful12PM (Fri 7th Aug)10ft (3.0m) 13s

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


The Lowdown

Alright folks, Rusty here. Let’s have a look at what’s coming down the pipe for the next couple of weeks.

First up, we’ve got Aha Rivermouth on the table. The water’s sitting at a warm 86.2°, which is a touch warmer than normal for this time of year – nice for a long session without a winter suit. Now, the bad news is that for the next week or so, the surf just isn’t going to be worth paddling out for. The conditions are poor, or the swell is ill-timed with the wind. You’ve got a few days with some clean faces, but the wave energy is low, and the swell direction isn’t locking in with the break’s optimum from the northeast.

The whole stretch from Friday the 7th right through to Thursday the 14th is pretty much a write-off. There’s a monster swell on the Friday morning with a massive 14.8ft from the ENE and a staggering energy reading (15427) – but the problem is, it’s a severe gale cross-shore, and the report explicitly says it’s too big for this break. That’s a kite surfer’s dream, not a paddle surfer’s. After that, the wind drops but the swell drops off a cliff, and you’re left with messy onshore or cross-shore breezes and weak, short-period swell. You’ll see a lot of zeros on the scorecard.

The real window of interest, and it’s a long shot, comes on the morning of Saturday the 15th of August. We’ve got a clean-looking 2.9ft swell from the ENE with a period bumping up to 11 seconds, and a gentle cross-shore breeze. The energy is moderate (272). It’s not going to blow your mind, but after so many flat, windy days, a clean little ankle-to-waist high runner on a rivermouth is something to get excited about. The crowds are listed as "sometimes" there, so you might have a few pals out.

After that, the window closes again. The week of the 16th sees another disappointing run of onshore winds and short-period slop, with a few pulses of bigger, messy 5.6ft – 6.9ft closeouts. There’s a glimmer on the morning of Friday the 21st with a cleaner 3.9ft swell and a light offshore cross, but it's a marginal call. Honestly, for the next two weeks, the 15th looks like the only morning worth the walk.

Short Range Forecast

Heavy rain (total 143mm), heaviest during Fri night. Warm (max 29°C on Fri afternoon, min 28°C on Fri morning). Winds decreasing (stormy winds from the SSE on Fri night, strong winds from the SSE by Sun night).

Days 4-6 Weather Summary

Heavy rain (total 50mm), heaviest during Tue afternoon. Warm (max 29°C on Mon morning, min 28°C on Tue night). Winds decreasing (fresh winds from the SSE on Mon morning, light winds from the W by Wed morning).

Friday
7
Saturday
8
Sunday
9
Monday
10
Tuesday
11
Wednesday
12
Thursday
13
AM
PM
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
1
0
1
0
2
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)
4.5
ENE
14
2.5
N
10
1
ENE
11
1.1
ENE
11
1.1
E
10
1.1
E
10
0.9
ENE
10
0.9
E
9
0.9
E
14
1.1
E
7
1.1
E
13
1
E
12
0.9
ENE
12
0.8
ENE
12
0.9
ENE
11
0.8
ENE
11
0.8
ENE
11
0.9
ESE
6
0.7
ENE
10
0.9
ESE
6
0.9
ESE
6
Wave Graph
Metric surfscale
Energy kJ
7551
1225
278
297
240
226
154
139
306
126
427
314
240
183
186
138
130
56
88
60
58
Wind (km/h)
80
NW
60
SSW
95
SSE
70
S
70
SSE
60
SSE
55
SSE
50
SSE
45
SSE
35
SSE
30
SSE
25
SSE
25
S
25
S
20
SSW
15
W
20
NE
25
ENE
20
ENE
15
NE
20
ESE
Wind State
cross
off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
off
cross-off
on
on
on
on
cross
High Tide
2:06PM1.45m
00:58AM1.73m
4:10PM1.52m
2:34AM1.74m
5:16PM1.66m
3:57AM1.83m
6:00PM1.79m
5:01AM1.95m
6:35PM1.89m
5:53AM2.06m
7:07PM1.97m
6:38AM2.14m
7:37PM2.02m
Low Tide
6:49PM1.21m
8:43AM0.59m
8:47PM1.28m
10:05AM0.46m
10:21PM1.21m
11:06AM0.32m
11:21PM1.08m
11:55AM0.21m
00:07AM0.93m
12:36PM0.15m
00:47AM0.79m
1:14PM0.15m
1:25AM0.67m
thunderstorm
thunderstorm
thunderstorm
mod rain
mod rain
mod rain
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
part cloud
part cloud
part cloud
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:54
5:54
5:54
5:54
5:56
5:56
5:56
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:09
7:09
7:08
7:07
7:07
7:06
7:06
 mm
12
24
70
8
7
9
4
3
6
2
8
10
5
11
13
1
4
14
Temp °C
28
29
28
28
29
29
29
29
29
29
29
29
29
29
29
29
29
29
29
29
29
Feels °C
20
25
20
21
24
25
26
26
27
29
30
30
31
32
32
33
32
32
32
33
32
  • 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
How to use the Wavefinder 
submit an eyeball surf report

Quick surf report for Aha Rivermouth:

join our community of surf reporters

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Aha Rivermouth surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.


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.

Nearest locationNearest