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Surf Forecasts:
Aha Rivermouth surfForecast / Okinawa / Japan
48hr Weather and Surf, issued 2 am Tuesday 12 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 8AM is: 1.4m 8s primary swell from a East-southeast direction and 0.1m 9s secondary swell from a Southeast direction (forecast issued at 02:00am May 12). The wind direction is predicted to be cross-shore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 May) | 4.5ft (1.4m) | 8s |
| Afternoon (12 May) | 4.5ft (1.3m) | 9s |
| Evening (12 May) | 4ft (1.2m) | 9s |
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 7mm), mostly falling on Tue morning. Warm (max 23°C on Tue morning, min 21°C on Thu night). Wind will be generally light. | ||||||||||||||||||||||||
Tuesday 12 | Wednesday 13 | Thursday 14 | ||||||||||||||||||||||
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 | 6 PM | 9 PM | |
Swell Height Map |    |    |    | |||||||||||||||||||||
E 9 | ESE 8 | E 8 | ESE 8 | ESE 9 | E 9 | E 9 | E 9 | E 10 | E 10 | E 10 | ENE 10 | E 10 | E 10 | E 9 | E 9 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | E 10 | E 9 | ESE 9 | ESE 9 | |
270 | 482 | 331 | 284 | 264 | 269 | 269 | 240 | 262 | 231 | 225 | 123 | 223 | 219 | 173 | 173 | 98 | 98 | 98 | 123 | 115 | 106 | 87 | 65 | |
Wind (km/h) | ||||||||||||||||||||||||
cross | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | |
High Tide | 3:18AM1.55m | 3:32PM1.46m | 3:57AM1.65m | 4:32PM1.61m | 4:33AM1.75m | 5:22PM1.74m | ||||||||||||||||||
Low Tide | 9:33AM0.72m | 9:36PM0.61m | 10:18AM0.51m | 10:26PM0.60m | 10:59AM0.30m | |||||||||||||||||||
 | |  | | | |  |  | | |  | | |  | | | | | | | | | |  | |
 | — | 5:41 | — | — | — | — | — | — | — | 5:41 | — | — | — | — | — | — | — | 5:39 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 7:04 | — | — | — | — | — | — | — | 7:05 | — | — | — | — | — | — | — | 7:06 | — |
— | — | 1 | 2 | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | |
Temp °C | 22 | 23 | 22 | 23 | 23 | 23 | 23 | 23 | 22 | 22 | 22 | 23 | 23 | 23 | 23 | 23 | 22 | 22 | 23 | 23 | 23 | 23 | 23 | 23 |
21 | 24 | 23 | 25 | 24 | 25 | 24 | 24 | 24 | 24 | 23 | 24 | 24 | 25 | 25 | 25 | 23 | 23 | 24 | 23 | 23 | 22 | 23 | 22 | |
Swell 1 Height (m) Direction Period (s) | E 9 | E 9 | E 8 | ESE 8 | ESE 9 | E 9 | SSE 8 | E 9 | E 10 | E 10 | E 10 | ENE 10 | E 10 | E 10 | E 9 | E 9 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | E 10 | E 9 | ESE 9 | ESE 9 |
 kJ | 270 | 355 | 331 | 284 | 264 | 269 | 7 | 240 | 262 | 231 | 225 | 123 | 223 | 219 | 173 | 173 | 98 | 98 | 98 | 123 | 115 | 106 | 86 | 65 |
Swell 2 Height (m) Direction Period (s) | N 5 | N 5 | SE 9 | SE 9 | W 5 | SSE 8 | — | SSE 8 | SE 8 | SSE 8 | SSE 8 | ESE 10 | SSE 8 | SSE 8 | SSE 8 | SSE 7 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | SSE 7 | SSE 7 |
| kJ | 1 | 1 | 3 | 3 | 1 | 7 | — | 7 | 3 | 7 | 7 | 100 | 13 | 11 | 11 | 11 | 61 | 59 | 59 | 32 | 16 | 17 | 5 | 4 |
Swell 3 Height (m) Direction Period (s) | — | SE 12 | — | S 11 | S 11 | S 11 | — | — | — | — | SW 4 | SSE 8 | SE 8 | SE 8 | SSE 8 | SSE 8 | SSE 7 | SSE 7 | SSE 7 | SSE 7 | SSE 7 | SSE 7 | SE 12 | SE 12 |
| kJ | — | 5 | — | 2 | 2 | 2 | — | — | — | — | 1 | 13 | 16 | 15 | 11 | 11 | 11 | 11 | 11 | 5 | 5 | 5 | 6 | 6 |
Wind waves Height (m) Direction Period (s) | SE 4 | ESE 8 | — | — | — | — | E 9 | — | — | — | — | — | — | — | — | — | — | — | — | — | E 3 | E 3 | E 9 | E 4 |
| kJ | 16 | 482 | — | — | — | — | 269 | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 5 | 87 | 30 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 12 | 60 | 595 | 595 | 44 | 12 | 40 | 12 | 12 | 12 | 40 | 70 | 66 | 595 | 12 | 12 | 12 | 12 | 12 | 66 | 60 | 664 | 44 | 595 |
Best forecast wave conditions in Okinawa | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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