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Surf Forecasts:
Aha Rivermouth surfForecast / Okinawa / Japan
48hr Weather and Surf, issued 2 am Tuesday 21 Apr 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
24.4° C
(Which is slightly warmer than usual)How big are the waves at Aha Rivermouth today?
The current surf forecast for Aha Rivermouth at 7AM is: 1.1m 12s primary swell from a East direction and 0.4m 11s secondary swell from a Northeast direction, 0.7m 5s secondary swell from a Northwest direction (forecast issued at 02:00am April 21). The wind direction is predicted to be cross-onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 Apr) | 3.5ft (1.0m) | 12s |
| Afternoon (21 Apr) | 3.5ft (1.1m) | 11s |
| Evening (21 Apr) | 3.5ft (1.0m) | 11s |
Table - waves today at Aha Rivermouth. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Tuesday 21 | Wednesday 22 | Thursday 23 | ||||||||||||||||||||||
| 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    | |||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 13 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 538 | 423 | 342 | 280 | 316 | 313 | 265 | 265 | 265 | 251 | 289 | 198 | 188 | 184 | 144 | 139 | 136 | 104 | 104 | 104 | 78 | 78 | 78 | 52 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- on | cross- on | cross- on | cross- on | on | on | on | cross- on | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | off | off | off | cross- off | cross- off |
High Tide / height (m) | 9:08PM 1.70 | 8:29AM 1.84 | 10:01PM 1.57 | 9:09AM 1.73 | 11:05PM 1.44 | 9:58AM 1.58 | ||||||||||||||||||
Low Tide / height (m) | 2:40AM 0.71 | 3:20PM 0.01 | 3:22AM 0.84 | 4:14PM 0.15 | 4:17AM 0.97 | 5:21PM 0.31 | ||||||||||||||||||
Tuesday 21 | Wednesday 22 | Thursday 23 | ||||||||||||||||||||||
| Sunrise | - | - | 5:58 | - | - | - | - | - | - | - | 5:56 | - | - | - | - | - | - | - | 5:56 | - | - | - | - | - |
| Sunset | - | - | - | - | - | - | 6:52 | - | - | - | - | - | - | - | 6:53 | - | - | - | - | - | - | - | 6:53 | - |
 | |  | |  | | |  | |  |  | | | | | | | | | | |  |  |  | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 | 6 | 10 |
| Temp. °C | 21 | 21 | 21 | 22 | 23 | 23 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 23 | 22 | 22 | 22 | 22 | 23 | 24 | 25 | 26 | 23 | 22 |
| Feels °C (?) | 20 | 19 | 20 | 20 | 23 | 22 | 21 | 21 | 23 | 22 | 21 | 21 | 20 | 21 | 20 | 20 | 20 | 19 | 21 | 22 | 23 | 22 | 22 | 20 |
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Live Wave Height (m)
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Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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