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Surf Forecasts:
Aha Rivermouth surfForecast / Okinawa / Japan
48hr Weather and Surf, issued 2 am Monday 04 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
23.5° C
(Which is 1.2°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 10AM is: 1.3m 6s primary swell from a North-northwest direction and 0.6m 9s secondary swell from a East-southeast direction (forecast issued at 02:00am May 04). An open ocean swell of 0.5m 6s is not directed at the surf break. The wind direction is predicted to be cross-onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (04 May) | 4ft (1.2m) | 6s |
| Afternoon (04 May) | 4.5ft (1.3m) | 6s |
| Evening (04 May) | 4ft (1.2m) | 7s |
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 75mm), heaviest during Tue night. Warm (max 21°C on Mon morning, min 15°C on Mon night). Winds decreasing (fresh winds from the NNE on Mon afternoon, calm by Wed night). | ||||||||||||||||||||||||
Monday 4 | Tuesday 5 | Wednesday 6 | ||||||||||||||||||||||
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 |    |    |    | |||||||||||||||||||||
ESE 9 | NNW 5 | NNW 6 | NNW 6 | NNW 6 | N 6 | N 6 | NNE 7 | N 7 | N 7 | NNE 5 | NNW 7 | E 9 | E 10 | E 10 | E 10 | E 6 | E 7 | E 7 | E 7 | ESE 8 | ESE 8 | E 8 | E 9 | |
65 | 65 | 80 | 94 | 122 | 126 | 109 | 131 | 130 | 97 | 73 | 75 | 64 | 65 | 68 | 314 | 109 | 126 | 131 | 279 | 232 | 238 | 228 | 220 | |
Wind (km/h) | ||||||||||||||||||||||||
cross | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | on | on | on | on | cross-on | on | on | cross-on | cross-on | on | on | cross-on | cross-on | cross | glassy | cross-on | |
High Tide | 7:14AM1.81m | 8:31PM1.58m | 7:39AM1.77m | 9:06PM1.52m | 8:05AM1.71m | |||||||||||||||||||
Low Tide | 1:24AM0.77m | 1:59PM0.13m | 1:50AM0.84m | 2:29PM0.18m | 2:17AM0.91m | 3:03PM0.25m | ||||||||||||||||||
 |  |  | |  | | |  |  | | | | | |  | | | | | | |  |  |  | |
 | — | 5:47 | — | — | — | — | — | — | — | 5:46 | — | — | — | — | — | — | — | 5:45 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 7:00 | — | — | — | — | — | — | — | 7:00 | — | — | — | — | — | — | — | 7:00 | — |
1 | 4 | 1 | 1 | — | 1 | 1 | — | 6 | 3 | 1 | 2 | — | 4 | 9 | 10 | 5 | 6 | 8 | 6 | 10 | 2 | — | — | |
Temp °C | 22 | 20 | 19 | 20 | 21 | 16 | 16 | 17 | 15 | 16 | 17 | 17 | 18 | 17 | 18 | 19 | 19 | 20 | 20 | 20 | 20 | 21 | 21 | 21 |
22 | 17 | 15 | 16 | 15 | 10 | 12 | 14 | 12 | 13 | 13 | 13 | 14 | 15 | 16 | 17 | 16 | 19 | 19 | 20 | 21 | 23 | 23 | 22 | |
Swell 1 Height (m) Direction Period (s) | S 5 | W 7 | W 7 | ESE 9 | ESE 9 | ESE 9 | ESE 10 | ESE 9 | E 9 | N 7 | E 9 | NNW 7 | NNW 7 | NNW 7 | E 10 | NNW 6 | E 10 | E 10 | E 10 | E 7 | NNW 6 | NNW 6 | E 8 | E 9 |
 kJ | 16 | 45 | 45 | 66 | 68 | 69 | 71 | 69 | 64 | 97 | 64 | 75 | 47 | 34 | 68 | 13 | 67 | 70 | 65 | 150 | 8 | 4 | 228 | 220 |
Swell 2 Height (m) Direction Period (s) | ESE 9 | ESE 9 | ESE 9 | W 7 | WSW 6 | W 7 | W 7 | WNW 7 | W 7 | E 9 | W 6 | E 9 | E 9 | E 10 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | E 9 | NNW 6 | — | NNW 6 | NNW 6 |
| kJ | 65 | 65 | 65 | 33 | 13 | 21 | 23 | 15 | 8 | 64 | 3 | 45 | 64 | 65 | 23 | 8 | 12 | 12 | 7 | 64 | 4 | — | 4 | 4 |
Swell 3 Height (m) Direction Period (s) | — | S 5 | SSE 5 | S 5 | WNW 7 | WSW 6 | WNW 6 | W 6 | W 6 | W 7 | W 6 | W 6 | ESE 6 | — | — | — | — | — | — | NNW 6 | — | — | N 8 | N 8 |
| kJ | — | 11 | 7 | 4 | 5 | 4 | 4 | 1 | 1 | 3 | 1 | 1 | 4 | — | — | — | — | — | — | 7 | — | — | 1 | 1 |
Wind waves Height (m) Direction Period (s) | W 6 | NNW 5 | NNW 6 | NNW 6 | NNW 6 | N 6 | N 6 | NNE 7 | N 7 | ENE 4 | NNE 5 | ENE 5 | ENE 5 | ENE 5 | E 5 | E 10 | E 6 | E 7 | E 7 | E 7 | ESE 8 | ESE 8 | — | — |
| kJ | 46 | 48 | 80 | 94 | 122 | 126 | 109 | 131 | 130 | 16 | 73 | 44 | 25 | 35 | 51 | 314 | 109 | 126 | 131 | 279 | 232 | 238 | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 46 | 627 | 627 | 639 | 681 | 605 | 40 | 40 | 40 | 68 | 40 | 68 | 595 | 595 | 595 | 595 | 66 | 40 | 595 | 12 | 696 | 17 | 0 | 595 |
Best forecast wave conditions in Okinawa | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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