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Surf Forecasts

Aha Rivermouth surfForecast / Okinawa / Japan

information circle12 Day Weather and Surf, issued 8 am Friday 16 May 2025 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
23.2° C
 (Which is 2.0°C colder than average for this time of year)

Best Forecast Surf Conditions for Aha Rivermouth this week:

The surf forecast for Aha Rivermouth over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (May 16) at 3PM. The primary swell is predicted to be 0.8m and 10s period with a secondary swell of 0.1m and 10s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Aha Rivermouth in the next 12 days are 0.9m 10s and forecast to arrive on Wednesday (May 21) at 9AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 8s period and expected on Wednesday (May 21) at 12PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 3PM (Fri 16th May)2.5ft (0.8m) 10s
Best Surf 3PM (Fri 16th May)2.5ft (0.8m) 10s
Most Powerful 9AM (Wed 21st May)3ft (0.9m) 10s

Table - best surf conditions forecast for Aha Rivermouth over the next 12 days.

Hourly12 Days
Okinawa Surf
Print Surf Table
Updates in  hr  min  s Forecast update imminent 
Friday
16
Saturday
17
Sunday
18
Monday
19
Tuesday
20
Wednesday
21
Thursday
22
Friday
23
Saturday
24
Sunday
25
Monday
26
Tuesday
27
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
1
1
1
1
1
1
0
1
1
1
1
1
1
0
1
0
0
0
0
0
0
0
0
0
0
0
1
1
1
0
0
0
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.5
E
0.8
ESE
0.8
ESE
0.7
SE
0.8
ESE
0.9
SE
0.8
ESE
0.6
SE
0.7
ESE
0.8
SE
0.7
SE
0.6
SE
0.6
SE
0.7
SE
0.6
SE
0.9
SE
0.5
E
0.6
SE
0.6
ESE
0.7
ESE
0.6
ESE
0.7
ESE
0.8
ESE
0.7
ESE
0.9
ESE
0.7
ESE
0.6
E
0.8
E
0.7
E
0.8
E
0.8
E
0.8
E
0.8
E
0.9
E
1.1
ESE
1.2
E
Period(s) (?)101010810998999998810989999910101010999998988
Wave
Graph
(?)Metric surfscale
Energy (?)4710910755105123103426710774616168451394342628665841009413598651047696999992117176201
Wind
(km/h)
20
SSE
20
S
15
S
15
S
15
SSW
15
S
15
SSW
10
SSW
15
SSW
15
SSW
15
SSW
15
S
15
SSW
15
SSW
15
S
15
SSW
10
WSW
10
ESE
5
E
10
ESE
10
E
15
ESE
20
ESE
15
ESE
25
SE
25
SSE
20
SSE
15
S
15
S
20
SSE
15
SE
10
ESE
15
ESE
15
ESE
20
E
15
E
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		offcross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		offcross-
on		cross-
on		crosscross-
on		cross-
on		cross-
on		crosscrosscross-
off		cross-
off		cross-
off		cross-
off		cross-
off		crosscross-
on		crosscross-
on		cross-
on		cross-
on
High Tide
/ height (m)
9:23PM
1.57
8:17AM
1.74
10:12PM
1.52
9:00AM
1.66
11:12PM
1.48
9:57AM
1.55
12:25AM
1.46
11:23AM
1.44
1:38AM
1.50
1:16PM
1.41
2:37AM
1.57
2:54PM
1.49
3:25AM
1.67
4:05PM
1.62
4:07AM
1.77
5:02PM
1.73
4:45AM
1.87
5:52PM
1.82
5:23AM
1.95
6:38PM
1.87
6:01AM
2.01
7:23PM
1.87
Low Tide
/ height (m)
2:38PM
0.16
2:33AM
0.98
3:20PM
0.23
3:19AM
1.03
4:11PM
0.33
4:26AM
1.07
5:15PM
0.45
6:01AM
1.06
6:33PM
0.55
7:39AM
0.94
7:53PM
0.61
8:53AM
0.75
9:02PM
0.64
9:49AM
0.53
9:59PM
0.66
10:36AM
0.32
10:48PM
0.67
11:21AM
0.14
11:32PM
0.70
12:03PM
0.00
12:13AM
0.74
12:46PM
-0.08
12:53AM
0.79
Friday
16
Saturday
17
Sunday
18
Monday
19
Tuesday
20
Wednesday
21
Thursday
22
Friday
23
Saturday
24
Sunday
25
Monday
26
Tuesday
27
Sunrise5:39--5:37--5:37--5:37--5:37--5:37--5:35--5:35--5:35--5:35--5:35--5:33--
Sunset-7:07--7:07--7:07--7:07--7:08--7:08--7:09--7:09--7:10--7:12--7:12--7:13-
clearclearclearpart cloudclearpart cloudclearthunderstorm thunderstorm clearclearpart cloudpart cloudpart cloudpart cloudthunderstorm thunderstorm part cloudthunderstorm part cloudcloudpart cloudclearpart cloudpart cloudclearrain showersthunderstorm thunderstorm thunderstorm cloudpart cloudclearclearclearclear
Rain (mm)
-------14------21-2-------2332------
Temp. °C262625262725272726272725272726272724242524242424252525272827262626252424
Feels °C (?)282827282928303029293028303029293026272826252526262627293031292929282626

Short Range Forecast: Light rain (total 5mm), mostly falling on Sun night. Warm (max 27°C on Sat afternoon, min 24°C on Fri night). Wind will be generally light.

Days 3-6 Weather Summary Light rain (total 3mm), mostly falling on Wed morning. Warm (max 27°C on Mon morning, min 24°C on Mon night). Wind will be generally light.

Days 6-9 Weather Summary Light rain (total 4mm), mostly falling on Sat night. Warm (max 25°C on Thu afternoon, min 24°C on Thu morning). Wind will be generally light.

Long Range Forecast: Light rain (total 8mm), mostly falling on Sun morning. Warm (max 28°C on Sun afternoon, min 23°C on Tue night). Wind will be generally light.

  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
<span class="translation_missing" title="translation missing: en.leaflet.map_placeholder_alt">Map Placeholder Alt</span>
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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 12 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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