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Surf Forecasts:
Aha Rivermouth surfForecast / Okinawa / Japan
48hr Weather and Surf, issued 8 am Friday 15 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
23.5° C
(Which is 1.6°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 1PM is: 1.3m 5s primary swell from a East direction and 0.5m 10s secondary swell from a East direction (forecast issued at 08:00am May 15). An open ocean swell of 0.1m 6s is not directed at the surf break. The wind direction is predicted to be cross-onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (15 May) | 4ft (1.2m) | 5s |
| Afternoon (15 May) | 4.5ft (1.3m) | 6s |
| Evening (15 May) | 5ft (1.5m) | 6s |
Table - waves today at Aha Rivermouth. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastMostly dry. Warm (max 23°C on Sun afternoon, min 21°C on Sat night). Mainly fresh winds. | ||||||||||||||||||||||||
Friday 15 | Saturday 16 | Sunday 17 | Mon 18 | |||||||||||||||||||||
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 | 12 AM | 3 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
E 9 | E 5 | E 5 | E 6 | E 6 | E 6 | E 6 | E 7 | E 7 | E 7 | E 7 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | |
192 | 67 | 92 | 110 | 127 | 162 | 178 | 196 | 229 | 266 | 343 | 424 | 482 | 558 | 583 | 542 | 505 | 505 | 493 | 481 | 432 | 418 | 363 | 329 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | |
High Tide | 5:08AM1.85m | 6:07PM1.83m | 5:42AM1.93m | 6:51PM1.87m | 6:18AM1.99m | 7:35PM1.87m | ||||||||||||||||||
Low Tide | 11:38AM0.11m | 11:50PM0.63m | 12:19PM-0.03m | 00:30AM0.67m | 12:59PM-0.11m | 1:09AM0.73m | ||||||||||||||||||
 | |  | | |  | | | | | | | | | | | | | |  | | | | | |
 | 5:39 | — | — | — | — | — | — | 5:39 | — | — | — | — | — | — | — | 5:37 | — | — | — | — | — | — | — | 5:37 |
 | — | — | — | — | 7:06 | — | — | — | — | — | — | — | 7:07 | — | — | — | — | — | — | — | 7:07 | — | — | 7:07 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 21 | 22 | 22 | 23 | 22 | 22 | 22 | 22 |
19 | 18 | 18 | 19 | 18 | 19 | 19 | 19 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 16 | 17 | 18 | 19 | 18 | 19 | 19 | 20 | |
Swell 1 Height (m) Direction Period (s) | ENE 11 | ESE 10 | E 10 | E 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 11 | N 7 | N 7 | N 6 | N 7 | SE 14 | SE 14 | SE 14 | SE 14 | SE 13 | SE 14 | SE 12 | ESE 12 | ESE 12 | ESE 12 |
 kJ | 23 | 51 | 46 | 47 | 54 | 33 | 36 | 36 | 20 | 11 | 4 | 4 | 3 | 4 | 7 | 7 | 7 | 7 | 7 | 7 | 6 | 15 | 15 | 15 |
Swell 2 Height (m) Direction Period (s) | SSE 6 | SE 12 | S 6 | SE 12 | S 6 | S 6 | SE 11 | SE 11 | SE 11 | N 7 | SE 11 | SE 10 | SE 10 | SE 14 | — | — | — | — | — | — | — | — | — | — |
| kJ | 4 | 6 | 1 | 5 | 1 | 1 | 5 | 4 | 5 | 1 | 5 | 4 | 4 | 7 | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | SE 12 | S 6 | SE 12 | S 6 | SE 11 | SE 11 | S 6 | SE 15 | SE 15 | SE 15 | SE 14 | SE 14 | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 6 | 1 | 6 | 1 | 5 | 5 | 1 | 8 | 8 | 8 | 8 | 8 | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | E 9 | E 5 | E 5 | E 6 | E 6 | E 6 | E 6 | E 7 | E 7 | E 7 | E 7 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 |
| kJ | 192 | 67 | 92 | 110 | 127 | 162 | 178 | 196 | 229 | 266 | 343 | 424 | 482 | 558 | 583 | 542 | 505 | 505 | 493 | 481 | 432 | 418 | 363 | 329 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 66 | 70 | 861 | 595 | 595 | 595 | 70 | 70 | 70 | 595 | 955 | 955 | 595 | 595 | 595 | 595 | 595 | 595 | 595 | 595 | 66 | 68 | 66 | 66 |
Best forecast wave conditions in Okinawa | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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