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Surf Forecasts:
Aha Rivermouth surfForecast / Okinawa / Japan
48hr Weather and Surf, issued 2 pm Saturday 16 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 1.6°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: 2.0m 8s primary swell from a East direction and 0.2m 6s secondary swell from a North direction, 0.1m 14s secondary swell from a Southeast direction (forecast issued at 02:00pm May 16). The wind direction is predicted to be cross-onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (16 May) | - | - |
| Afternoon (16 May) | 6ft (1.9m) | 8s |
| Evening (16 May) | 6.5ft (2.0m) | 8s |
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 Sat afternoon, min 22°C on Sat afternoon). Mainly fresh winds. | ||||||||||||||||||||||||
Sat 16 | Sunday 17 | Monday 18 | Tue 19 | |||||||||||||||||||||
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 |    |    |    |    | ||||||||||||||||||||
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 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 9 | E 9 | |
424 | 454 | 470 | 520 | 516 | 477 | 439 | 454 | 493 | 428 | 428 | 418 | 417 | 417 | 382 | 390 | 438 | 427 | 427 | 372 | 390 | 409 | 503 | 461 | |
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 | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | on | |
High Tide | 6:51PM1.87m | 6:18AM1.99m | 7:35PM1.87m | 6:55AM2.01m | 8:20PM1.83m | 7:34AM1.98m | ||||||||||||||||||
Low Tide | 12:19PM-0.03m | 00:30AM0.67m | 12:59PM-0.11m | 1:09AM0.73m | 1:42PM-0.12m | 1:49AM0.79m | ||||||||||||||||||
 | | |  | | |  | | | | | | |  | | | | | | | | | | | |
 | — | — | — | — | — | 5:37 | — | — | — | — | — | — | — | 5:37 | — | — | — | — | — | — | — | 5:37 | — | — |
 | — | — | 7:07 | — | — | — | — | — | — | — | 7:07 | — | — | — | — | — | — | — | 7:07 | — | — | — | — | 7:07 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 22 | 23 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 |
18 | 20 | 18 | 18 | 19 | 19 | 18 | 17 | 17 | 18 | 19 | 18 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 20 | 21 | 22 | 22 | 22 | |
Swell 1 Height (m) Direction Period (s) | N 7 | N 7 | N 7 | N 6 | SE 14 | SE 14 | SE 14 | SE 14 | SE 14 | SE 13 | SE 13 | ESE 12 | ESE 12 | ESE 12 | SE 12 | SE 12 | SE 12 | SE 12 | SE 12 | SE 12 | E 8 | E 8 | E 9 | E 9 |
 kJ | 4 | 4 | 4 | 3 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 15 | 15 | 15 | 6 | 6 | 6 | 6 | 6 | 6 | 390 | 409 | 503 | 461 |
Swell 2 Height (m) Direction Period (s) | SE 14 | E 15 | — | SE 14 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SE 12 | — | — | — | — |
| kJ | 8 | 4 | — | 7 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 6 | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | SE 11 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | 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 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | — | — | — | — |
| kJ | 424 | 454 | 470 | 520 | 516 | 477 | 439 | 454 | 493 | 428 | 428 | 418 | 417 | 417 | 382 | 390 | 438 | 427 | 427 | 372 | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 595 | 595 | 595 | 595 | 595 | 66 | 40 | 595 | 986 | 68 | 68 | 68 | 595 | 66 | 66 | 70 | 66 | 66 | 66 | 66 | 60 | 40 | 40 | 40 |
Best forecast wave conditions in Okinawa | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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