Surf Forecasts:
Aha Rivermouth surf forecast from 4 Jul 2026:
- Best quality surf: Wednesday 8 Jul, 12PM (local time) - 10ft (3.0m), 18s period, ESE swell with cross-onshore winds.
- Most powerful swell: Friday 10 Jul, 6AM (local time) - 21ft (6.5m), 19s period, SE swell with 31,505 kJ wave energy.
- Next surfable swell (1★+): Monday 6 Jul, 3AM (local time) - 0.5ft (0.2m), 19s period with E 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 Monday (Jul 06) at 3AM. The primary swell is predicted to be 0.2m and 19s period with a secondary swell of 0.4m and 9s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Aha Rivermouth in the next 16 days are 6.5m 19s and forecast to arrive on Friday (Jul 10) at 6AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 8.5m 17s period and expected on Friday (Jul 10) at 9PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Mon 6th Jul) | 0.5ft (0.2m) 19s |
| Best Surf | 12PM (Wed 8th Jul) | 10ft (3.0m) 18s |
| Most Powerful | 6AM (Fri 10th Jul) | 21ft (6.5m) 19s |
Table - best surf conditions forecast for Aha Rivermouth over the next 16 days.
Updates in hr min s Forecast update imminent
Alright folks, Rusty here. Let's take a look at the local surf for the next couple of weeks.
I'm not gonna sugarcoat it – the Aha Rivermouth is looking pretty quiet to start. The water is 81°, which is a tick cooler than normal for this time of year, so you might want a light spring suit. We kick off with a couple of flat days on Sunday and Monday with tiny 1ft to 2ft waves and poor conditions – not worth getting wet.
There is one real window of opportunity. Tuesday morning, July 7th, is the clear winner. The wind is glassy, dead calm, and that ESE swell comes in at a clean 4ft with a long 14-second period and moderate wave energy (497). The wind is offshore from the WNW, so the surface will be smooth. That’s your session, no question.
It goes downhill fast after that. Tuesday afternoon the wind gets messy, and by Wednesday, July 8th, the swell jumps to 8ft to 10ft of ESE groundswell with a very long 18-second period. The wave energy is massive (4,480 to 5,392), but the onshore wind makes it a washing machine. That’s expert-only, and honestly, it looks more like a kite-surfing day than a paddle day.
From Thursday, July 9th, onward, it’s a total loss. We’ve got a solid week of brutal onshore winds from the east and southeast, blowing 22 to 28 mph, with huge, messy, stormy surf. The combined energy peaks at 14,370, but it’s all junk. A few days around July 12th to 14th drop to tiny 0.7ft to 1ft windswell, but the wind is still bad. The stretch from July 9th to July 20th is a big, empty gap with no surf to speak of.
So, the one and only call is a glassy Tuesday morning on the 7th. After that, it’s a long wait. Not the best outlook for the Rivermouth, but that’s how it goes sometimes.
Rusty.
Short Range ForecastMostly dry. Warm (max 29°C on Sun afternoon, min 26°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 17mm), heaviest on Thu night. Warm (max 29°C on Thu afternoon, min 27°C on Wed morning). Winds increasing (light winds from the NE on Wed morning, strong winds from the ESE by Fri night). | ||||||||||||||||||||
Sunday 5 | Monday 6 | Tuesday 7 | Wednesday 8 | Thursday 9 | Friday 10 | Saturday 11 | |||||||||||||||
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 9 | ESE 9 | ESE 9 | ESE 16 | ESE 17 | ESE 14 | ESE 14 | ESE 15 | ESE 18 | ESE 18 | ESE 18 | ESE 17 | SE 17 | SE 18 | SE 18 | SE 18 | SSE 17 | S 17 | SSE 16 | SSE 13 | SSE 12 |
Wave Graph  | |||||||||||||||||||||
 kJ | 26 | 26 | 25 | 53 | 162 | 285 | 497 | 539 | 2581 | 4480 | 5392 | 7669 | 11014 | 14370 | 21235 | 0 | 0 | 0 | 0 | 0 | 0 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | cross-off | cross-off | glassy | cross-on | on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross | cross-off |
High Tide | 9:20AM1.79m | 10:26PM1.78m | 10:11AM1.70m | 11:06PM1.76m | 11:15AM1.59m | 11:52PM1.74m | 12:38PM1.50m | 00:47AM1.73m | 2:24PM1.47m | 1:52AM1.75m | 4:01PM1.54m | 3:01AM1.80m | 5:12PM1.66m | ||||||||
Low Tide | 3:54PM0.46m | 4:24AM0.86m | 4:36PM0.60m | 5:22AM0.82m | 5:25PM0.76m | 6:31AM0.76m | 6:25PM0.92m | 7:49AM0.67m | 7:40PM1.05m | 9:07AM0.54m | 9:04PM1.12m | 10:14AM0.38m | 10:19PM1.12m | ||||||||
 | |  | | | | | | | | | |  |  |  | | | | | | | |
 | 5:37 | — | — | 5:37 | — | — | 5:37 | — | — | 5:39 | — | — | 5:39 | — | — | 5:39 | — | — | 5:39 | — | — |
 | — | 7:23 | — | — | 7:23 | — | — | 7:23 | — | — | 7:23 | — | — | 7:22 | — | — | 7:22 | — | — | 7:22 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 5 | 1 | 2 | 7 | 3 | 3 | 5 |
Temp °C | 28 | 29 | 27 | 28 | 28 | 27 | 27 | 28 | 27 | 27 | 28 | 28 | 28 | 29 | 29 | 29 | 29 | 28 | 29 | 29 | 29 |
Feels °C | 31 | 32 | 31 | 31 | 32 | 32 | 31 | 31 | 30 | 30 | 30 | 29 | 28 | 29 | 29 | 27 | 27 | 25 | 27 | 27 | 28 |
Swell 1 Height (m) Direction Period (s) | ESE 9 | ESE 9 | W 6 | W 6 | ESE 17 | ESE 14 | ESE 14 | ESE 15 | ESE 18 | ESE 18 | ESE 18 | ESE 17 | SE 17 | SE 18 | SE 18 | SE 18 | SSE 17 | S 17 | — | SSW 14 | SW 15 |
| kJ | 26 | 26 | 17 | 27 | 162 | 285 | 497 | 539 | 2581 | 4480 | 5392 | 7669 | 11014 | 14370 | 21235 | 30146 | 26930 | 40622 | — | 2515 | 1576 |
Swell 2 Height (m) Direction Period (s) | W 6 | W 6 | ESE 9 | ESE 8 | W 7 | W 6 | W 7 | ESE 12 | W 6 | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 11 | 12 | 25 | 24 | 23 | 19 | 25 | 199 | 12 | — | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | S 7 | S 7 | SE 9 | ESE 16 | ESE 8 | ESE 9 | SW 8 | W 7 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 4 | 4 | 3 | 53 | 24 | 25 | 3 | 15 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | SSW 2 | W 6 | WSW 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | SSE 17 | SSE 16 | SSE 13 | SSE 12 |
| kJ | — | 1 | 6 | 7 | — | — | — | — | — | — | — | — | — | — | — | — | — | 25324 | 17126 | 6202 | 3435 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 681 | 706 | 914 | 0 | 0 | 0 | 0 | 30 | 68 | 68 | 595 | 68 | 673 | 673 | 673 | 595 | 690 | 595 | 595 | 693 | 595 |
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