Surf Forecasts:
Aha Rivermouth surf forecast from 19 Oct 2026:
- Best quality surf: Tuesday 27 Oct, 3AM (local time) - 4.5ft (1.4m), 10s period, ESE swell with cross-offshore winds.
- Most powerful swell: Thursday 22 Oct, 6AM (local time) - 15ft (4.5m), 16s period, SE swell with 9,885 kJ wave energy.
- Next surfable swell (1★+): Tuesday 27 Oct, 3AM (local time) - 4.5ft (1.4m), 10s 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 Tuesday (Oct 27) at 3AM. The primary swell is predicted to be 1.4m and 10s 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 4.5m 16s and forecast to arrive on Thursday (Oct 22) at 6AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 4.5m 16s period and expected on Friday (Oct 23) at 3AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Tue 27th Oct) | 4.5ft (1.4m) 10s |
| Best Surf | 3AM (Tue 27th Oct) | 4.5ft (1.4m) 10s |
| Most Powerful | 6AM (Thu 22nd Oct) | 15ft (4.5m) 16s |
Table - best surf conditions forecast for Aha Rivermouth over the next 16 days.
Short Range ForecastHeavy rain (total 31mm), heaviest during Wed night. Warm (max 27°C on Tue morning, min 24°C on Wed night). Winds increasing (light winds from the E on Tue morning, near gales from the NE by Thu morning). | Days 4-6 Weather SummaryModerate rain (total 14mm), heaviest on Sat morning. Warm (max 27°C on Fri morning, min 26°C on Fri morning). Mainly fresh winds. | ||||||||||||||||||||
Tuesday 20 | Wednesday 21 | Thursday 22 | Friday 23 | Saturday 24 | Sunday 25 | Monday 26 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | ESE 13 | ESE 13 | SE 14 | SE 16 | SE 16 | SE 16 | NNE 8 | NNE 8 | N 9 | ESE 10 | ESE 9 | ESE 9 | ESE 8 | SE 8 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1110 | 1157 | 2185 | 3978 | 6967 | 8759 | 998 | 809 | 340 | 772 | 632 | 397 | 466 | 456 | 206 | 208 | 208 | 172 | 287 | 336 | 428 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | on | on | on | on | on | cross-on | cross-on | cross-on | cross | cross | cross | cross | cross | cross-on | cross-on | cross | cross | cross-off |
High Tide | 3:33PM1.48m | 2:23AM1.35m | 4:07PM1.58m | 3:46AM1.48m | 4:35PM1.68m | 4:38AM1.64m | 5:02PM1.78m | 5:22AM1.78m | 5:29PM1.87m | 6:02AM1.89m | 5:57PM1.94m | 6:42AM1.95m | 6:26PM2.00m | ||||||||
Low Tide | 9:25PM1.13m | 9:08AM0.70m | 10:08PM0.94m | 10:03AM0.63m | 10:42PM0.74m | 10:45AM0.58m | 11:13PM0.54m | 11:23AM0.55m | 11:46PM0.35m | 11:59AM0.55m | 00:19AM0.18m | 12:33PM0.58m | 00:55AM0.06m | ||||||||
 | |  |  |  |  |  | | | | | | | |  | | |  | | | | |
 | 6:28 | — | — | 6:28 | — | — | 6:28 | — | — | 6:30 | — | — | 6:30 | — | — | 6:31 | — | — | 6:31 | — | — |
 | — | 5:53 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — | 5:51 | — | — | 5:50 | — | — | 5:49 | — |
mm | — | — | — | — | 3 | 19 | 3 | 4 | 2 | 2 | 2 | 3 | 6 | — | — | — | — | 1 | — | — | — |
Temp °C | 27 | 27 | 26 | 27 | 27 | 26 | 24 | 26 | 27 | 27 | 27 | 27 | 27 | 27 | 26 | 26 | 27 | 26 | 26 | 26 | 26 |
Feels °C | 30 | 29 | 27 | 28 | 27 | 23 | 19 | 23 | 27 | 28 | 29 | 28 | 26 | 29 | 28 | 27 | 29 | 28 | 27 | 27 | 28 |
Swell 1 Height (m) Direction Period (s) | ESE 13 | ESE 13 | SE 14 | SE 16 | SE 16 | SE 16 | SSE 16 | SSE 16 | SSE 15 | S 16 | S 15 | S 14 | SSW 13 | SSW 12 | S 10 | S 9 | ESE 9 | S 8 | S 8 | ESE 9 | ESE 10 |
| kJ | 1110 | 1157 | 2185 | 3978 | 6967 | 8759 | 8713 | 7806 | 6967 | 5790 | 4522 | 2471 | 1452 | 833 | 417 | 194 | 208 | 64 | 29 | 336 | 428 |
Swell 2 Height (m) Direction Period (s) | ENE 9 | SE 17 | NNW 8 | SE 20 | — | — | — | — | N 9 | N 8 | NE 8 | N 8 | NE 8 | NE 8 | SW 12 | ENE 10 | S 9 | E 10 | ENE 9 | SSW 7 | SSW 7 |
| kJ | 121 | 560 | 6 | 1716 | — | — | — | — | 340 | 136 | 57 | 28 | 24 | 9 | 167 | 35 | 125 | 64 | 16 | 18 | 9 |
Swell 3 Height (m) Direction Period (s) | — | ENE 9 | — | ENE 9 | — | — | — | — | — | NNW 8 | N 8 | NE 8 | N 7 | N 7 | NE 7 | SW 11 | ENE 9 | NE 9 | N 5 | — | NNE 7 |
| kJ | — | 227 | — | 147 | — | — | — | — | — | 55 | 48 | 21 | 9 | 4 | 2 | 40 | 32 | 19 | 2 | — | 5 |
Wind waves Height (m) Direction Period (s) | — | — | ENE 9 | — | ENE 9 | NE 6 | NNE 8 | NNE 8 | ENE 7 | ESE 10 | ESE 9 | ESE 9 | ESE 8 | SE 8 | ESE 9 | ESE 9 | — | ESE 9 | ESE 9 | — | — |
| kJ | — | — | 141 | — | 217 | 287 | 998 | 809 | 334 | 772 | 632 | 397 | 466 | 456 | 206 | 208 | — | 172 | 287 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 12 | 12 | 40 | 40 | 596 | 626 | 595 | 693 | 681 | 693 | 690 | 44 | 595 | 70 | 44 | 70 | 70 | 70 | 595 | 664 | 621 |
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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