- Forecast
- Maps
- Live
- Weather State
- Spot Information
Surf Forecasts:
Aha Rivermouth surfForecast / Okinawa / Japan
48hr Weather and Surf, issued 8 pm Monday 18 May 2026 JSTForecast update in hr min s Forecast update imminent
Aha Rivermouth surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Aha Rivermouth sea temperature is
23.4° C
(Which is 2.0°C colder than average for this time of year)How big are the waves at Aha Rivermouth today?
The current surf forecast for Aha Rivermouth at 4AM is: 2.0m 8s primary swell from a East direction (forecast issued at 08:00pm May 18). The wind direction is predicted to be cross-onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (19 May) | 6ft (1.8m) | 8s |
| Afternoon (19 May) | 5ft (1.6m) | 8s |
| Evening (19 May) | 5ft (1.5m) | 8s |
Table - waves today at Aha Rivermouth. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 3mm), mostly falling on Mon night. Warm (max 26°C on Thu afternoon, min 22°C on Mon night). Winds decreasing (fresh winds from the ENE on Mon night, light winds from the ESE by Tue afternoon). | ||||||||||||||||||||||||
Mon 18 | Tuesday 19 | Wednesday 20 | Thursday 21 | |||||||||||||||||||||
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 | 12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | |
Swell Height Map |   |    |    |    | ||||||||||||||||||||
E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 9 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | |
448 | 499 | 610 | 567 | 499 | 459 | 401 | 356 | 309 | 317 | 284 | 284 | 256 | 221 | 254 | 230 | 235 | 210 | 210 | 201 | 166 | 166 | 166 | 166 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross | cross-off | off | off | off | off | off | off | off | off | off | cross-off | cross-off | off | off | off | off | |
High Tide | 8:20PM1.83m | 7:34AM1.98m | 9:07PM1.77m | 8:16AM1.91m | 9:58PM1.68m | 9:03AM1.80m | ||||||||||||||||||
Low Tide | 1:49AM0.79m | 2:26PM-0.07m | 2:33AM0.86m | 3:13PM0.03m | 3:23AM0.92m | |||||||||||||||||||
 |  |  |  |  |  |  | | |  | | | | | | | | | | | | | | | |
 | — | — | — | 5:37 | — | — | — | — | — | — | — | 5:37 | — | — | — | — | — | — | — | 5:37 | — | — | — | — |
 | 7:07 | — | — | — | — | — | — | — | 7:07 | — | — | — | — | — | — | — | 7:08 | — | — | — | — | — | — | 7:08 |
1 | — | — | 2 | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 22 | 22 | 22 | 23 | 23 | 24 | 24 | 25 | 25 | 24 | 24 | 23 | 23 | 24 | 25 | 25 | 25 | 23 | 23 | 23 | 23 | 24 | 25 | 26 |
20 | 19 | 20 | 23 | 23 | 26 | 26 | 28 | 28 | 27 | 27 | 26 | 26 | 26 | 27 | 27 | 27 | 25 | 25 | 25 | 24 | 25 | 26 | 27 | |
Swell 1 Height (m) Direction Period (s) | — | — | — | — | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 9 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 |
 kJ | — | — | — | — | 499 | 459 | 401 | 356 | 309 | 317 | 284 | 284 | 256 | 221 | 254 | 230 | 235 | 210 | 210 | 201 | 166 | 166 | 166 | 166 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | NE 8 | — | — | — | — | — | — | — | E 12 | — | E 11 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | 17 | — | — | — | — | — | — | — | 3 | — | 3 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | E 8 | E 8 | E 8 | E 8 | — | — | — | — | — | — | — | — | — | — | SW 3 | SW 3 | SW 3 | WSW 3 | WSW 3 | SSW 3 | SSW 4 | SW 4 | SW 4 | SW 4 |
| kJ | 448 | 499 | 610 | 567 | — | — | — | — | — | — | — | — | — | — | 2 | 2 | 2 | 2 | 2 | 4 | 8 | 8 | 12 | 22 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 40 | 595 | 70 | 40 | 40 | 40 | 40 | 12 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 30 | 0 | 0 | 0 | 0 |
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