Surf Forecasts:
How big are the waves at Aha Rivermouth today (20 Aug):
- Morning surf: Morning surf (20 Aug, local time) - 5ft (1.6m), 8s period with ESE swell.
- Afternoon surf: Afternoon surf (20 Aug, local time) - 5ft (1.6m), 7s period with ESE swell.
- Evening surf: Evening surf (20 Aug, local time) - 5.5ft (1.7m), 9s period with SE swell.
The current surf forecast for Aha Rivermouth at 11AM is: 1.7m 7s primary swell from a East-southeast direction (forecast issued at 08:00am August 20). An open ocean swell of 0.8m 10s is not directed at the surf break, a second open ocean swell of 0.1m 9s is not directed at the surf break. The wind direction is predicted to be cross-shore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 Aug) | 5ft (1.6m) | 8s |
| Afternoon (20 Aug) | 5ft (1.6m) | 7s |
| Evening (20 Aug) | 5.5ft (1.7m) | 9s |
Table - waves today at Aha Rivermouth. (Swell directed towards the surf break)
Short Range ForecastModerate rain (total 16mm), heaviest on Thu morning. Warm (max 28°C on Thu morning, min 27°C on Thu night). Mainly strong winds. | ||||||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | ||||||||||||||||||||
6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | |
Swell Height Map |  |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | ESE 8 | ESE 8 | ESE 7 | ESE 7 | ESE 7 | SE 9 | SE 6 | SE 7 | ESE 10 | SE 8 | SE 6 | SE 8 | SE 8 | ENE 8 | SSE 9 | SSE 9 | NE 9 | ESE 6 | ESE 6 | SSE 9 | E 14 | ESE 6 |
Wave Graph  | ||||||||||||||||||||||
 kJ | 373 | 270 | 294 | 216 | 161 | 430 | 398 | 574 | 10 | 427 | 306 | 735 | 985 | 14 | 0 | 0 | 3 | 266 | 325 | 0 | 4 | 177 |
Wind (km/h) | ||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross |
High Tide | 11:35AM1.41m | 10:59PM1.71m | 1:42PM1.30m | 11:43PM1.60m | 5:29PM1.41m | |||||||||||||||||
Low Tide | 5:24AM0.74m | 4:36PM1.10m | 6:35AM0.81m | 4:55PM1.26m | 8:22AM0.83m | 7:56PM1.39m | ||||||||||||||||
 |  | | | |  | | | | | |  | |  | | | | | | | | | |
 | 6:00 | — | — | — | — | — | — | — | 6:00 | — | — | — | — | — | — | — | 6:01 | — | — | — | — | — |
 | — | — | — | — | 6:59 | — | — | — | — | — | — | — | 6:59 | — | — | — | — | — | — | — | 6:58 | — |
mm | — | 1 | 1 | 1 | 1 | 1 | — | — | — | 1 | 1 | — | — | — | — | — | 1 | 1 | 1 | 1 | 1 | 1 |
Temp °C | 28 | 28 | 28 | 28 | 28 | 28 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 28 | 28 | 28 | 27 |
Feels °C | 30 | 29 | 29 | 29 | 30 | 29 | 25 | 26 | 26 | 26 | 25 | 24 | 24 | 25 | 25 | 25 | 25 | 25 | 27 | 27 | 27 | 26 |
Swell 1 Height (m) Direction Period (s) | SSW 10 | S 10 | S 10 | S 9 | S 9 | ESE 10 | SW 9 | SW 10 | ESE 10 | ENE 8 | SW 9 | SW 9 | SW 10 | SW 9 | SW 9 | — | NE 9 | S 9 | S 9 | — | E 14 | S 9 |
| kJ | 33 | 94 | 115 | 165 | 220 | 10 | 3 | 4 | 10 | 24 | 12 | 3 | 15 | 14 | 14 | — | 3 | 651 | 588 | — | 4 | 599 |
Swell 2 Height (m) Direction Period (s) | S 8 | ENE 8 | SW 9 | SW 9 | ESE 11 | SW 9 | — | SW 9 | SW 10 | ENE 8 | SW 8 | SW 10 | ENE 8 | ENE 8 | — | — | — | — | E 14 | — | — | — |
| kJ | 5 | 14 | 3 | 3 | 12 | 3 | — | 29 | 4 | 21 | 25 | 4 | 25 | 14 | — | — | — | — | 4 | — | — | — |
Swell 3 Height (m) Direction Period (s) | SW 8 | SW 8 | SW 9 | SW 9 | SW 9 | ESE 10 | — | — | SW 10 | — | — | SW 9 | — | — | — | — | — | — | — | — | — | — |
| kJ | 3 | 3 | 12 | 3 | 3 | 20 | — | — | 14 | — | — | 3 | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | ESE 8 | ESE 8 | ESE 7 | ESE 7 | ESE 7 | SE 9 | SE 6 | SE 7 | SSE 8 | SE 8 | SE 6 | SE 8 | SE 8 | SSE 9 | SSE 9 | SSE 9 | SSE 9 | ESE 6 | ESE 6 | SSE 9 | SSE 9 | ESE 6 |
| kJ | 373 | 270 | 294 | 216 | 161 | 430 | 398 | 574 | 491 | 427 | 306 | 735 | 985 | 1151 | 1093 | 1238 | 1260 | 266 | 325 | 1363 | 1157 | 177 |
Nearest Offshore or Glassy | ||||||||||||||||||||||
Distance (km) | 70 | 70 | 70 | 70 | 70 | 70 | 70 | 70 | 595 | 595 | 595 | 595 | 595 | 595 | 595 | 595 | 595 | 595 | 595 | 664 | 683 | 683 |
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.
Nearest