Surf Forecasts:
Aha Rivermouth surf forecast from 20 Jun 2026:
- Best quality surf: Saturday 27 Jun, 9PM (local time) - 10ft (3.0m), 15s period, SE swell with cross-shore winds.
- Most powerful swell: Sunday 28 Jun, 12AM (local time) - 20ft (6.0m), 15s period, SE swell with 15,902 kJ wave energy.
- Next surfable swell (1★+): Sunday 21 Jun, 12PM (local time) - 2ft (0.6m), 9s period with ESE 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 Sunday (Jun 21) at 12PM. The primary swell is predicted to be 0.6m and 9s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Aha Rivermouth in the next 16 days are 6.0m 15s and forecast to arrive on Sunday (Jun 28) at 12AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 12s period and expected on Wednesday (Jun 24) at 3PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12PM (Sun 21st Jun) | 2ft (0.6m) 9s |
| Best Surf | 9PM (Sat 27th Jun) | 10ft (3.0m) 15s |
| Most Powerful | 12AM (Sun 28th Jun) | 20ft (6.0m) 15s |
Table - best surf conditions forecast for Aha Rivermouth over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range ForecastMostly dry. Warm (max 28°C on Tue morning, min 25°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 3mm), mostly falling on Wed night. Warm (max 28°C on Wed afternoon, min 26°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Sunday 21 | Monday 22 | Tuesday 23 | Wednesday 24 | Thursday 25 | Friday 26 | Sat 27 | |||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | |
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | SE 9 | SE 9 | ESE 9 | ESE 9 | SE 11 | SE 10 | SE 12 | E 8 | E 8 | SE 12 | SE 8 | SE 11 | SE 11 | ESE 11 | SE 11 | NE 11 | NE 10 | SE 10 | SE 10 | SE 12 | SE 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 29 | 39 | 50 | 50 | 179 | 212 | 396 | 11 | 11 | 22 | 51 | 42 | 29 | 45 | 30 | 30 | 28 | 25 | 49 | 319 | 1086 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | off | off | off | cross-off | glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross-on | on |
High Tide | 11:12PM1.75m | 10:54AM1.63m | 00:01AM1.71m | 12:07PM1.49m | 00:54AM1.68m | 1:39PM1.41m | 1:50AM1.68m | 3:17PM1.40m | 2:45AM1.69m | 4:36PM1.46m | 3:36AM1.71m | 5:34PM1.53m | 4:20AM1.74m | ||||||||
Low Tide | 5:13AM0.87m | 5:25PM0.58m | 6:21AM0.84m | 6:19PM0.76m | 7:36AM0.79m | 7:20PM0.91m | 8:49AM0.71m | 8:28PM1.02m | 9:53AM0.61m | 9:35PM1.09m | 10:44AM0.51m | 10:34PM1.12m | 11:26AM0.42m | ||||||||
 |  |  | | | | | | | | | |  | |  | | | | |  | | |
 | — | 5:33 | — | — | 5:33 | — | — | 5:33 | — | — | 5:33 | — | — | 5:33 | — | — | 5:35 | — | — | 5:35 | — |
 | 7:22 | — | 7:22 | — | — | 7:22 | — | — | 7:22 | — | — | 7:22 | — | — | 7:22 | — | — | 7:22 | — | — | 7:23 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | 1 | 1 | — | — | — | 2 | 2 |
Temp °C | 25 | 27 | 27 | 26 | 26 | 27 | 26 | 28 | 28 | 27 | 27 | 28 | 27 | 27 | 28 | 27 | 27 | 28 | 27 | 27 | 27 |
Feels °C | 27 | 30 | 30 | 30 | 29 | 29 | 29 | 32 | 31 | 31 | 30 | 30 | 31 | 30 | 31 | 29 | 29 | 31 | 31 | 29 | 27 |
Swell 1 Height (m) Direction Period (s) | WSW 8 | W 7 | W 7 | ESE 9 | SE 11 | SE 10 | SE 12 | SSE 11 | SSE 10 | S 11 | S 11 | S 12 | S 13 | S 12 | S 13 | SSW 12 | SSW 12 | SSW 12 | SW 12 | SE 12 | SE 13 |
| kJ | 83 | 52 | 34 | 50 | 179 | 212 | 396 | 450 | 418 | 565 | 476 | 871 | 848 | 657 | 775 | 511 | 294 | 235 | 192 | 319 | 1086 |
Swell 2 Height (m) Direction Period (s) | SE 9 | SE 9 | ESE 9 | W 7 | W 6 | W 7 | WSW 6 | E 8 | E 8 | E 8 | ESE 11 | SE 11 | SE 11 | ESE 11 | NE 9 | NE 11 | SSE 7 | SSE 8 | SSE 8 | SW 11 | SW 10 |
| kJ | 29 | 39 | 50 | 34 | 21 | 15 | 8 | 11 | 11 | 12 | 51 | 30 | 29 | 45 | 23 | 30 | 57 | 67 | 62 | 185 | 110 |
Swell 3 Height (m) Direction Period (s) | E 8 | E 8 | NE 9 | SE 13 | NE 10 | NE 10 | NNW 6 | WSW 6 | W 6 | SE 12 | N 6 | N 6 | NE 10 | NE 10 | SE 11 | SE 10 | NE 10 | SE 10 | SE 10 | NE 9 | S 8 |
| kJ | 6 | 6 | 3 | 44 | 4 | 4 | 4 | 7 | 3 | 22 | 7 | 3 | 15 | 16 | 30 | 26 | 28 | 25 | 49 | 21 | 18 |
Wind waves Height (m) Direction Period (s) | SSW 3 | SW 7 | SSW 3 | — | — | — | — | — | — | — | SE 8 | SE 7 | — | — | — | SSE 8 | — | — | — | SE 8 | — |
| kJ | 4 | 8 | 1 | — | — | — | — | — | — | — | 36 | 42 | — | — | — | 99 | — | — | — | 57 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 17 | 12 | 0 | 0 | 0 | 0 | 0 | 17 | 17 | 664 | 595 | 595 | 664 | 595 | 595 | 627 | 595 | 605 | 68 | 70 | 68 |
Best forecast wave conditions in Okinawa | |||||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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.
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