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Surf Forecasts:
Aha Rivermouth surfForecast / Okinawa / Japan
48hr Weather and Surf, issued 8 pm Tuesday 19 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 2.0°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 5AM is: 1.3m 8s primary swell from a East-southeast direction (forecast issued at 08:00pm May 19). An open ocean swell of 0.2m 2s is not directed at the surf break. The wind direction is predicted to be cross-offshore and the swell rating is 2.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 May) | 4.5ft (1.3m) | 8s |
| Afternoon (20 May) | 4ft (1.2m) | 10s |
| Evening (20 May) | 3.5ft (1.1m) | 10s |
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 9mm), mostly falling on Fri afternoon. Warm (max 26°C on Thu afternoon, min 23°C on Tue night). Wind will be generally light. | ||||||||||||||||||||||||
Tue 19 | Wednesday 20 | Thursday 21 | Friday 22 | |||||||||||||||||||||
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 | 12 PM | 3 PM | |
Swell Height Map |   |    |    |    | ||||||||||||||||||||
E 8 | E 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 9 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 9 | ESE 9 | |
298 | 302 | 270 | 270 | 250 | 216 | 271 | 248 | 248 | 210 | 210 | 201 | 166 | 166 | 166 | 166 | 166 | 166 | 135 | 123 | 123 | 120 | 126 | 126 | |
Wind (km/h) | ||||||||||||||||||||||||
cross | off | cross-off | cross-off | off | off | off | off | off | cross-off | cross-off | cross-off | cross-off | off | off | off | off | off | off | off | off | cross-off | glassy | glassy | |
High Tide | 9:07PM1.77m | 8:16AM1.91m | 9:58PM1.68m | 9:03AM1.80m | 10:55PM1.61m | 9:59AM1.66m | ||||||||||||||||||
Low Tide | 2:33AM0.86m | 3:13PM0.03m | 3:23AM0.92m | 4:05PM0.18m | 4:24AM0.97m | |||||||||||||||||||
 |  | | | | | |  | | | | | | | | | |  | |  |  | |  | | |
 | — | — | — | 5:37 | — | — | — | — | — | — | — | 5:37 | — | — | — | — | — | — | — | 5:35 | — | — | — | — |
 | 7:07 | — | — | — | — | — | — | — | 7:08 | — | — | — | — | — | — | — | 7:08 | — | — | — | — | — | — | 7:09 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 4 | |
Temp °C | 24 | 24 | 24 | 23 | 23 | 24 | 25 | 25 | 25 | 24 | 23 | 23 | 23 | 24 | 25 | 26 | 25 | 24 | 24 | 24 | 24 | 24 | 23 | 23 |
28 | 28 | 27 | 25 | 26 | 27 | 28 | 27 | 27 | 26 | 25 | 24 | 24 | 25 | 25 | 27 | 26 | 26 | 26 | 26 | 27 | 28 | 27 | 27 | |
Swell 1 Height (m) Direction Period (s) | E 8 | E 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 9 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 9 | ESE 9 |
 kJ | 298 | 302 | 270 | 270 | 250 | 216 | 271 | 248 | 248 | 210 | 210 | 201 | 166 | 166 | 166 | 166 | 166 | 166 | 135 | 123 | 123 | 120 | 126 | 126 |
Swell 2 Height (m) Direction Period (s) | SE 11 | — | — | — | — | NE 8 | ENE 8 | — | — | — | — | W 4 | — | E 12 | — | E 11 | — | — | W 7 | — | W 6 | W 6 | W 6 | W 6 |
| kJ | 5 | — | — | — | — | 17 | 7 | — | — | — | — | 1 | — | 3 | — | 3 | — | — | 50 | — | 41 | 38 | 26 | 19 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | E 11 | E 11 | — | E 11 | SSW 4 | E 10 | — | NNW 4 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 2 | — | 2 | 5 | 2 | — | 4 |
Wind waves Height (m) Direction Period (s) | — | — | — | WSW 2 | — | WSW 3 | — | — | — | — | SW 3 | S 3 | S 4 | SW 4 | SW 4 | WSW 6 | WSW 6 | W 7 | SSW 3 | WSW 7 | SW 7 | — | — | — |
| kJ | — | — | — | 1 | — | 1 | — | — | — | — | 1 | 3 | 9 | 16 | 16 | 37 | 56 | 64 | 7 | 82 | 46 | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 12 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 46 | 30 | 78 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Okinawa | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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