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Surf Forecasts:
Aha Rivermouth surfForecast / Okinawa / Japan
48hr Weather and Surf, issued 8 am Monday 11 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
23.7° C
(Which is 1.3°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: 1.4m 9s primary swell from a East direction and 0.3m 11s secondary swell from a Southeast direction (forecast issued at 08:00am May 11). The wind direction is predicted to be onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (11 May) | 4.5ft (1.4m) | 9s |
| Afternoon (11 May) | 4.5ft (1.3m) | 10s |
| Evening (11 May) | 5.5ft (1.7m) | 9s |
Table - waves today at Aha Rivermouth. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 83mm), heaviest during Mon morning. Warm (max 23°C on Tue afternoon, min 21°C on Mon morning). Winds decreasing (fresh winds from the ESE on Mon afternoon, calm by Tue night). | ||||||||||||||||||||||||
Monday 11 | Tuesday 12 | Wednesday 13 | Thu 14 | |||||||||||||||||||||
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 | ESE 9 | E 9 | E 10 | E 9 | E 9 | E 9 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 10 | E 10 | ESE 11 | E 10 | E 10 | E 10 | E 10 | E 9 | ENE 10 | |
339 | 304 | 325 | 313 | 408 | 455 | 483 | 482 | 422 | 376 | 445 | 408 | 281 | 287 | 248 | 276 | 226 | 146 | 225 | 220 | 214 | 214 | 136 | 125 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | cross-on | on | on | cross-on | cross-on | cross | cross | cross | cross | cross-off | cross-off | off | glassy | cross-off | cross-off | cross | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | |
High Tide | 2:08PM1.34m | 3:18AM1.55m | 3:32PM1.46m | 3:57AM1.65m | 4:32PM1.61m | |||||||||||||||||||
Low Tide | 8:35AM0.92m | 8:35PM0.63m | 9:33AM0.72m | 9:36PM0.61m | 10:18AM0.51m | 10:26PM0.60m | ||||||||||||||||||
 |  | | | |  |  | |  |  | |  | | | |  |  |  | | | |  | | | |
 | 5:41 | — | — | — | — | — | — | 5:41 | — | — | — | — | — | — | — | 5:41 | — | — | — | — | — | — | — | 5:39 |
 | — | — | — | — | 7:04 | — | — | — | — | — | — | — | 7:04 | — | — | — | — | — | — | — | 7:05 | — | — | 7:06 |
1 | 19 | 32 | 13 | 2 | 1 | — | — | — | 1 | 4 | 7 | 4 | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 22 | 21 | 21 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 |
22 | 22 | 20 | 21 | 19 | 20 | 21 | 22 | 22 | 22 | 23 | 24 | 25 | 26 | 25 | 26 | 25 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | |
Swell 1 Height (m) Direction Period (s) | SE 12 | ESE 9 | E 9 | SE 11 | SE 10 | SSE 10 | — | — | — | ESE 8 | ESE 8 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 10 | E 10 | ESE 11 | E 10 | E 10 | E 10 | E 10 | E 9 | ENE 10 |
 kJ | 36 | 304 | 325 | 19 | 16 | 10 | — | — | — | 376 | 333 | 408 | 281 | 287 | 248 | 276 | 226 | 146 | 225 | 220 | 214 | 214 | 136 | 125 |
Swell 2 Height (m) Direction Period (s) | N 5 | SE 12 | SE 11 | N 6 | N 6 | N 5 | — | — | — | S 11 | S 11 | SE 8 | SE 8 | SE 8 | SE 8 | SSE 8 | SSE 8 | E 10 | SSE 8 | SSE 8 | SSE 8 | SSE 7 | ESE 10 | ESE 9 |
| kJ | 2 | 35 | 19 | 1 | 1 | 1 | — | — | — | 2 | 2 | 3 | 3 | 3 | 3 | 7 | 6 | 117 | 13 | 12 | 11 | 11 | 39 | 68 |
Swell 3 Height (m) Direction Period (s) | N 5 | N 5 | N 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SSE 8 | SSE 8 | — | — | — | SSE 7 | SSE 7 |
| kJ | 1 | 2 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 6 | 12 | — | — | — | 11 | 11 |
Wind waves Height (m) Direction Period (s) | E 9 | — | — | E 10 | E 9 | E 9 | E 9 | ESE 8 | ESE 8 | — | ESE 8 | — | — | — | — | — | — | — | NNE 3 | NNE 3 | — | — | — | — |
| kJ | 339 | — | — | 313 | 408 | 455 | 483 | 482 | 422 | — | 445 | — | — | — | — | — | — | — | 2 | 2 | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 595 | 595 | 673 | 40 | 44 | 12 | 12 | 595 | 70 | 70 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 31 | 75 | 94 | 68 | 70 | 66 | 66 |
Best forecast wave conditions in Okinawa | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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