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Aha Rivermouth surfForecast / Okinawa / Japan
12 Day Weather and Surf, issued 8 pm Friday 11 Jul 2025 JST
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 Saturday (Jul 12) at 9AM. The primary swell is predicted to be 0.5m and 8s period with a secondary swell of 0.4m and 5s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Aha Rivermouth in the next 12 days are 4.5m 13s and forecast to arrive on Saturday (Jul 19) at 3AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.0m 8s period and expected on Monday (Jul 14) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Sat 12th Jul) | 1.5ft (0.5m) 8s |
| Best Surf | 3AM (Tue 15th Jul) | 4.5ft (1.3m) 8s |
| Most Powerful | 3AM (Sat 19th Jul) | 15ft (4.5m) 13s |
Table - best surf conditions forecast for Aha Rivermouth over the next 12 days.
Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | Wed 23 | |||||||||||||||||||||||||
| Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | |
Rating (10 max) | ||||||||||||||||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  |  |  |  |  |  | |||||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||||||||||||||
| Period(s) (?) | 7 | 8 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 8 | 7 | 7 | 10 | 10 | 9 | 11 | 10 | 10 | 10 | 11 | 12 | 13 | 13 | 13 | 12 | 12 | 11 | 10 | 10 | 9 | 9 | 9 | 9 | 8 | 8 | 14 |
Wave (?)Graph  | ||||||||||||||||||||||||||||||||||||
| Energy (?) | 61 | 52 | 39 | 95 | 79 | 87 | 62 | 33 | 27 | 304 | 134 | 82 | 55 | 85 | 99 | 166 | 181 | 179 | 694 | 1386 | 2131 | 5064 | 7969 | 9805 | 12295 | 11043 | 8702 | 3707 | 978 | 755 | 526 | 317 | 306 | 204 | 173 | 484 |
Wind (km/h) | ||||||||||||||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | off | cross- off | off | off | off | off | off | cross- off | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross | cross- on | cross- on | cross | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | on | on | cross- on | cross | cross | cross- off | cross- off | cross- off | cross- off | cross- on | cross- on |
High Tide / height (m) | 6:59AM 1.97 | 8:28PM 1.87 | 7:40AM 1.99 | 9:00PM 1.88 | 8:23AM 1.98 | 9:33PM 1.88 | 9:09AM 1.93 | 10:08PM 1.86 | 9:59AM 1.83 | 10:46PM 1.83 | 10:58AM 1.70 | 11:28PM 1.80 | 12:13PM 1.57 | 12:20AM 1.77 | 1:54PM 1.49 | 1:23AM 1.75 | 3:44PM 1.52 | 2:37AM 1.77 | 5:04PM 1.62 | 3:47AM 1.83 | 5:58PM 1.73 | 4:48AM 1.91 | ||||||||||||||
Low Tide / height (m) | 1:21AM 1.01 | 1:49PM 0.16 | 1:58AM 0.94 | 2:25PM 0.18 | 2:37AM 0.88 | 3:03PM 0.26 | 3:19AM 0.82 | 3:42PM 0.38 | 4:06AM 0.77 | 4:23PM 0.54 | 4:59AM 0.74 | 5:09PM 0.72 | 6:03AM 0.71 | 6:02PM 0.91 | 7:20AM 0.66 | 7:12PM 1.08 | 8:43AM 0.58 | 8:40PM 1.17 | 9:58AM 0.45 | 10:04PM 1.19 | 11:00AM 0.32 | 11:10PM 1.14 | 11:51AM 0.21 | |||||||||||||
Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | Wed 23 | |||||||||||||||||||||||||
| Sunrise | - | 5:41 | - | - | 5:41 | - | - | 5:41 | - | - | 5:41 | - | - | 5:41 | - | - | 5:43 | - | - | 5:43 | - | - | 5:43 | - | - | 5:43 | - | - | 5:45 | - | - | 5:45 | - | - | 5:46 | - |
| Sunset | - | - | 7:22 | - | - | 7:22 | - | - | 7:22 | - | - | 7:22 | - | - | 7:22 | - | - | 7:22 | - | - | 7:21 | - | - | 7:21 | - | - | 7:21 | - | - | 7:20 | - | - | 7:20 | - | - | 7:19 |
 |  | | |  |  | | | |  | |  | | | | | | | | | | | | | | | | | | |  | | | | | | |
Rain (mm) | 11 | 1 | 2 | 1 | - | - | 4 | 2 | 1 | - | - | 1 | - | - | - | - | - | 3 | 4 | 1 | 1 | 3 | 1 | 2 | - | 2 | 2 | 2 | 4 | 1 | - | - | - | - | - | 2 |
| Temp. °C | 28 | 29 | 30 | 28 | 30 | 30 | 28 | 28 | 29 | 28 | 29 | 29 | 28 | 29 | 29 | 28 | 29 | 29 | 28 | 28 | 29 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 29 | 29 | 29 | 29 |
| Feels °C (?) | 31 | 31 | 33 | 33 | 33 | 32 | 31 | 27 | 31 | 30 | 31 | 31 | 31 | 32 | 33 | 31 | 31 | 30 | 28 | 28 | 29 | 27 | 27 | 26 | 26 | 25 | 25 | 25 | 26 | 28 | 30 | 32 | 33 | 34 | 33 | 31 |
Short Range Forecast: Heavy rain (total 22mm), heaviest during Fri night. Warm (max 30°C on Sat afternoon, min 27°C on Fri night). Winds increasing (light winds from the SSW on Sat night, fresh winds from the WSW by Mon morning). | Days 3-6 Weather Summary Light rain (total 4mm), mostly falling on Thu afternoon. Warm (max 29°C on Tue morning, min 27°C on Tue night). Winds increasing (light winds from the SSE on Wed afternoon, fresh winds from the ESE by Thu afternoon). | Days 6-9 Weather Summary Moderate rain (total 16mm), heaviest on Thu night. Warm (max 29°C on Fri afternoon, min 28°C on Thu night). Mainly near gales. | Long Range Forecast: Light rain (total 9mm), mostly falling on Mon morning. Warm (max 29°C on Mon afternoon, min 28°C on Sun night). Winds decreasing (near gales from the N on Sun night, calm by Tue afternoon). | |||||||||||||||||||||||||||||||||
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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 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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