Surf Forecasts:
Aha Rivermouth surf forecast from 16 Jul 2026:
- Most powerful swell: Thursday 23 Jul, 6AM (local time) - 2.5ft (0.7m), 11s period, ENE swell with 99 kJ wave energy.
Best Forecast Surf Conditions for Aha Rivermouth this week:
The most powerful waves expected at Aha Rivermouth in the next 16 days are 0.7m 11s and forecast to arrive on Thursday (Jul 23) 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 0.8m 8s period and expected on Monday (Jul 20) at 12PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 6AM (Thu 23rd Jul) | 2.5ft (0.7m) 11s |
Table - best surf conditions forecast for Aha Rivermouth over the next 16 days.
The Lowdown
G’day, Rusty here, and I’ve gotta give it to ya straight – Aha Rivermouth is lookin’ pretty bleak for a while. You’re gonna be starin’ at a lot of flat water before anything happens. The first real chance of a wave ain’t ’til Monday, July 28th, so that’s over a week of nothin’ worth paddlin’ for. The swell energy stays weak, mostly under 100, with only a few little bumps into the low triple-digits – nothin’ to write home about.
Right now, through Thursday afternoon, July 16th, the water’s a bit colder than usual at 27° – about a degree and a half off the norm, so you might want a wetsuit. But we’ve only got 0.4m of tiny east swell, with a cross-off westerly breeze at 20 km/h. It’s clean, but gutless. That’s the pattern for days: tiny 0.3m to 0.5m east-northeast slop, short periods around 8-10 seconds, and winds that start clean but turn cross-on and choppy by mid-week. By Thursday, July 23rd, we get a little bump to 0.7m from the east-northeast, but it’s got t-storms riskin’ and onshore winds – not worth the effort.
The only real event lands on Monday, July 28th. That mornin’, a massive 7.5m easterly groundswell rolls in with a 14-second period, and the combined energy is a huge 21704 – that’s strong, no doubt. Wind’s cross-shore at 30 km/h, so it’s lumpy, and this is expert-only. The swell’s just too big for this beach-and-jetty spot – it’ll be a mess. Monday afternoon gets even bigger: 12.0m from the east-southeast, same 14-second period, energy up to 57788. That’s a beast, but only for the most experienced. For everyone else, stay on the sand.
After that, Wednesday, July 29th, drops back to 0.2m and messy onshore junk. The rest of the month is lumpy cross-onshore winds and poor surf. The 31st brings a severe gale at 75 km/h from the south-southeast – clean but ugly.
So here’s the deal: one standout day on Monday, July 28th, but it’s for experts only. The rest is a flat, frustrating stretch. Forecasts can change, but right now, it’s a tough one. Keep the board waxed and wait for better days.
Rusty
Short Range ForecastMostly dry. Warm (max 30°C on Sun morning, min 27°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 30°C on Sun afternoon, min 27°C on Mon night). Wind will be generally light. | |||||||||||||||||||
Thu 16 | Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | ||||||||||||||
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) | E 10 | E 10 | E 10 | E 10 | E 10 | ENE 10 | ENE 10 | ENE 10 | ENE 9 | ENE 9 | ENE 9 | ENE 10 | ENE 10 | ENE 10 | E 9 | E 9 | E 9 | ENE 9 | ENE 13 | ENE 10 |
Wave Graph  | ||||||||||||||||||||
 kJ | 29 | 29 | 17 | 16 | 17 | 18 | 18 | 31 | 29 | 29 | 28 | 31 | 30 | 30 | 43 | 43 | 42 | 27 | 18 | 57 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | cross-off | off | off | off | off | cross-off | off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-on | cross | cross-on | cross-on | on |
High Tide | 8:38PM1.98m | 8:10AM2.09m | 9:13PM1.97m | 8:54AM2.00m | 9:47PM1.94m | 9:38AM1.88m | 10:21PM1.90m | 10:26AM1.72m | 10:57PM1.84m | 11:20AM1.55m | 11:36PM1.77m | 12:35PM1.40m | 00:23AM1.70m | |||||||
Low Tide | 2:20AM0.77m | 2:47PM0.17m | 3:02AM0.72m | 3:24PM0.31m | 3:46AM0.71m | 4:00PM0.48m | 4:33AM0.72m | 4:36PM0.67m | 5:26AM0.75m | 5:13PM0.86m | 6:30AM0.78m | 5:55PM1.04m | ||||||||
 |  | | | | | | |  | | | | | | | | | | |  | |
 | — | — | 5:43 | — | — | 5:43 | — | — | 5:43 | — | — | 5:43 | — | — | 5:45 | — | — | 5:45 | — | — |
 | 7:22 | — | — | 7:22 | — | — | 7:21 | — | — | 7:21 | — | — | 7:21 | — | — | 7:20 | — | — | 7:20 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 |
Temp °C | 29 | 27 | 29 | 29 | 27 | 29 | 29 | 28 | 30 | 30 | 28 | 29 | 29 | 28 | 28 | 28 | 27 | 27 | 28 | 27 |
Feels °C | 32 | 31 | 32 | 32 | 31 | 32 | 32 | 32 | 33 | 33 | 31 | 32 | 32 | 32 | 32 | 31 | 32 | 31 | 31 | 31 |
Swell 1 Height (m) Direction Period (s) | E 10 | E 10 | WSW 5 | E 10 | W 6 | W 9 | W 8 | W 8 | W 8 | W 8 | W 7 | W 8 | SW 8 | WSW 7 | WSW 7 | E 9 | E 9 | ENE 9 | ENE 8 | ENE 10 |
| kJ | 29 | 29 | 25 | 16 | 28 | 71 | 60 | 41 | 63 | 40 | 23 | 45 | 23 | 40 | 29 | 43 | 42 | 27 | 14 | 57 |
Swell 2 Height (m) Direction Period (s) | SW 9 | SW 9 | E 10 | SW 9 | SSW 8 | ENE 10 | SW 7 | ENE 10 | SSW 8 | ENE 9 | SW 8 | SW 7 | ENE 10 | ENE 10 | E 9 | WSW 7 | SW 7 | W 7 | ENE 11 | ENE 12 |
| kJ | 14 | 13 | 17 | 12 | 27 | 18 | 27 | 31 | 43 | 29 | 28 | 19 | 30 | 30 | 43 | 20 | 14 | 8 | 12 | 30 |
Swell 3 Height (m) Direction Period (s) | S 7 | S 7 | SW 9 | SE 10 | E 10 | SE 9 | ENE 10 | ESE 8 | ENE 9 | SE 9 | ENE 9 | ENE 10 | SE 9 | SSW 8 | S 7 | S 7 | S 7 | SW 7 | ENE 13 | WSW 7 |
| kJ | 9 | 9 | 12 | 4 | 17 | 12 | 18 | 6 | 29 | 3 | 28 | 31 | 3 | 6 | 4 | 4 | 4 | 7 | 18 | 5 |
Wind waves Height (m) Direction Period (s) | W 5 | W 5 | SSW 5 | WSW 5 | SW 8 | SSW 8 | — | SW 8 | — | SSW 8 | — | — | W 7 | — | — | — | — | — | — | — |
| kJ | 11 | 12 | 15 | 30 | 34 | 41 | — | 29 | — | 37 | — | — | 37 | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 639 | 605 | 596 | 673 | 12 | 596 | 12 | 12 | 17 | 639 | 12 | 75 | 75 | 17 | 17 | 75 | 75 | 75 | 75 | 75 |
Best forecast wave conditions in Okinawa | ||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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 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.
Nearest