Aha Rivermouth surfForecast / Okinawa / Japan

information circle12 Day Weather and Surf, issued 2 am Friday 26 Dec 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
23.6° C
(Which is normal for this time of year)


Best Forecast Surf Conditions for Aha Rivermouth this week:

The most powerful waves expected at Aha Rivermouth in the next 12 days are 3.5m 11s and forecast to arrive on Friday (Dec 26) at 9AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 8s period and expected on Tuesday (Dec 30) at 6PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 9AM (Fri 26th Dec)11ft (3.5m) 11s

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

Updates in  hr  min  s Forecast update imminent

Short Range Forecast Light rain (total 2mm), mostly falling on Fri night. Very mild (max 19°C on Sun night, min 14°C on Fri morning). Winds decreasing (strong winds from the N on Fri morning, light winds from the ENE by Sat night).

Days 3-6 Weather Summary Heavy rain (total 60mm), heaviest during Tue night. Warm (max 20°C on Tue morning, min 16°C on Wed morning). Winds increasing (light winds from the E on Mon morning, near gales from the NNE by Tue night).

Friday
26
Saturday
27
Sunday
28
Monday
29
Tuesday
30
Wednesday
31
Thursday
01
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Wave Height (m) & direction (?)
3.5
N
3
NNW
2.2
N
1.6
NNW
1.3
N
1
N
0.6
ENE
0.7
ENE
0.7
ENE
0.7
ENE
0.5
ENE
0.5
ENE
0.5
ENE
1.3
SE
2.3
NNE
2.5
NNE
2.4
NNE
2
NNE
1.2
N
1.4
NNE
0.8
N
Period(s) (?)1110109981414141313131377888877
Wave
Graph
(?)Metric surfscale
Energy kJ (?)247918969804512571271521751661581021019817447393378248416319357
Wind
(km/h)
40
N
35
N
20
NNE
15
NNE
15
NNE
10
ENE
10
ENE
15
ENE
15
E
15
E
20
E
25
ESE
30
ESE
25
ESE
55
NNE
40
NNE
40
N
30
NNE
30
NNE
30
NNE
25
NE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on
cross-
on
cross-
on
oncross-
on
cross-
on
cross-
on
oncross-
on
cross-
on
cross-
on
crosscross-
on
cross-
on
ononcross-
on
ononcross-
on
on
High Tide
/ height (m)
11:00AM
1.53
10:40PM
1.45
11:47AM
1.51
11:56PM
1.35
12:40PM
1.50
1:31AM
1.30
1:38PM
1.52
3:09AM
1.32
2:40PM
1.56
4:29AM
1.40
3:38PM
1.63
5:31AM
1.50
4:32PM
1.71
Low Tide
/ height (m)
4:57PM
0.71
5:12AM
0.41
6:04PM
0.64
6:11AM
0.56
7:19PM
0.55
7:19AM
0.69
8:34PM
0.41
8:33AM
0.79
9:41PM
0.24
9:44AM
0.83
10:41PM
0.08
10:47AM
0.84
11:33PM
-0.06
Friday
26
Saturday
27
Sunday
28
Monday
29
Tuesday
30
Wednesday
31
Thursday
01
Sunrise7:11--7:13--7:13--7:13--7:13--7:13--7:15--
Sunset-5:39--5:40--5:42--5:42--5:43--5:44--5:44-
cloud
cloud
rain showers
part cloud
part cloud
part cloud
part cloud
part cloud
cloud
rain showers
light rain
heavy rain
mod rain
mod rain
heavy rain
light rain
cloud
light rain
cloud
cloud
part cloud
Rain (mm)
--2------331387241-1---
Temp. °C141515161717181819191919202018171717171717
Feels °C (?)581012131416151717161516179101010111111
  • 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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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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