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Surf Forecasts:
Aha Rivermouth surfForecast / Okinawa / Japan
48hr Weather and Surf, issued 2 pm Saturday 09 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 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 9PM is: 1.6m 10s primary swell from a East direction and 0.9m 7s secondary swell from a North direction, 0.5m 7s secondary swell from a North direction (forecast issued at 02:00pm May 09). The wind direction is predicted to be cross-onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (09 May) | - | - |
| Afternoon (09 May) | 3ft (0.9m) | 10s |
| Evening (09 May) | 5ft (1.6m) | 10s |
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 62mm), heaviest during Mon afternoon. Warm (max 23°C on Mon night, min 16°C on Sat afternoon). Mainly fresh winds. | ||||||||||||||||||||||||
Sat 9 | Sunday 10 | Monday 11 | Tue 12 | |||||||||||||||||||||
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 | 6 AM | 9 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
N 7 | ESE 10 | E 10 | E 10 | E 7 | E 7 | E 8 | E 9 | E 9 | E 9 | E 8 | E 8 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | |
269 | 176 | 443 | 492 | 225 | 235 | 386 | 498 | 550 | 582 | 555 | 517 | 476 | 586 | 386 | 348 | 364 | 476 | 325 | 380 | 380 | 372 | 318 | 264 | |
Wind (km/h) | ||||||||||||||||||||||||
on | on | cross-on | cross-on | cross-on | cross-on | 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 | cross | cross-off | cross-off | off | |
High Tide | 10:15AM1.40m | 1:19AM1.38m | 12:02PM1.31m | 2:29AM1.45m | 2:08PM1.34m | 3:18AM1.55m | ||||||||||||||||||
Low Tide | 5:48PM0.56m | 7:02AM1.07m | 7:16PM0.62m | 8:35AM0.92m | 8:35PM0.63m | |||||||||||||||||||
 | | |  | | | | | | |  |  | | | | | |  | |  | | | | | |
 | — | — | — | — | — | 5:43 | — | — | — | — | — | — | — | 5:41 | — | — | — | — | — | — | — | 5:41 | — | — |
 | — | — | 7:02 | — | — | — | — | — | — | — | 7:02 | — | — | — | — | — | — | — | 7:04 | — | — | — | — | 7:04 |
3 | 4 | 5 | 2 | 1 | 1 | 1 | 2 | 1 | 1 | — | — | 1 | 1 | — | — | 2 | 9 | 8 | 3 | 2 | 2 | 4 | 8 | |
Temp °C | 17 | 16 | 17 | 19 | 19 | 20 | 20 | 20 | 21 | 21 | 21 | 21 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 23 | 23 | 22 |
12 | 11 | 12 | 14 | 15 | 18 | 17 | 16 | 18 | 17 | 17 | 18 | 20 | 21 | 21 | 20 | 21 | 23 | 22 | 21 | 22 | 24 | 24 | 21 | |
Swell 1 Height (m) Direction Period (s) | ESE 10 | N 7 | N 8 | N 7 | N 7 | ESE 9 | N 7 | N 6 | N 6 | N 6 | N 6 | N 6 | SE 12 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | SE 10 | E 9 | E 9 | E 9 | E 9 |
 kJ | 176 | 159 | 115 | 88 | 66 | 146 | 33 | 22 | 19 | 12 | 6 | 6 | 24 | 435 | 386 | 348 | 364 | 325 | 325 | 4 | 380 | 372 | 318 | 264 |
Swell 2 Height (m) Direction Period (s) | — | ESE 10 | N 7 | N 7 | ESE 10 | N 7 | — | — | — | S 15 | SE 13 | SSE 13 | N 6 | SE 12 | SE 12 | SE 12 | SE 11 | SE 11 | SE 10 | N 5 | SE 9 | SSE 9 | SE 9 | SE 9 |
| kJ | — | 176 | 54 | 28 | 100 | 47 | — | — | — | 4 | 7 | 17 | 3 | 23 | 23 | 35 | 19 | 19 | 16 | 1 | 13 | 8 | 3 | 3 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | N 6 | — | N 5 | N 6 | — | N 6 | — | — | — | — | SE 11 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | — | 1 | 1 | — | 1 | — | — | — | — | 5 |
Wind waves Height (m) Direction Period (s) | N 7 | ENE 5 | E 10 | E 10 | E 7 | E 7 | E 8 | E 9 | E 9 | E 9 | E 8 | E 8 | E 9 | E 9 | — | — | — | E 9 | — | E 9 | — | — | — | S 3 |
| kJ | 269 | 61 | 443 | 492 | 225 | 235 | 386 | 498 | 550 | 582 | 555 | 517 | 476 | 586 | — | — | — | 476 | — | 380 | — | — | — | 6 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 595 | 595 | 595 | 595 | 595 | 66 | 40 | 68 | 68 | 68 | 595 | 595 | 66 | 66 | 66 | 595 | 664 | 44 | 595 | 44 | 12 | 44 | 12 | 0 |
Best forecast wave conditions in Okinawa | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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