Aha Rivermouth Surf Forecast

/ Okinawa (32 surf breaks) /

Japan (129 surf breaks) / Lat Long: (26.72° N 128.30° E)

Surf Forecasts:

Aha Rivermouth surfForecast / Okinawa / Japan

12 Day Weather and Surf, issued 2 am Wednesday 27 Aug 2025 JST

Forecast 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 29.8° C
(Which is 1.1°C warmer than normal for this time of year)

Best Forecast Surf Conditions for Aha Rivermouth this week:

The surf forecast for Aha Rivermouth over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Aug 30) at 6AM. The primary swell is predicted to be 0.7m and 8s period with a secondary swell of 0.3m and 10s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Aha Rivermouth in the next 12 days are 0.8m 10s and forecast to arrive on Wednesday (Sep 03) at 12AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Monday (Sep 01) at 9AM.

Wave Type	Time (JST) & Date	Wave Height & Period
Next good surf (1 star+)	6AM (Sat 30th Aug)	2.5ft (0.7m) 8s
Best Surf	6AM (Sat 30th Aug)	2.5ft (0.7m) 8s
Most Powerful	12AM (Wed 3rd Sep)	2.5ft (0.8m) 10s

Table - best surf conditions forecast for Aha Rivermouth over the next 12 days.

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

	Short Range Forecast Light rain (total 5mm), mostly falling on Fri afternoon. Warm (max 29°C on Wed morning, min 26°C on Fri afternoon). Wind will be generally light.									Days 3-6 Weather Summary Some drizzle, heaviest during Mon morning. Warm (max 29°C on Sun afternoon, min 27°C on Sat morning). Wind will be generally light.
	Wednesday 27			Thursday 28			Friday 29			Saturday 30			Sunday 31			Monday 01			Tuesday 02
	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night
Rating (10 max)	0	0	0	0	0	0	0	0	0	1	1	1	1	0	0	0	0	0	0	0	0
Swell Height Map See all maps
Wave Height (m) & direction (?)	E	SE	SE	SE	SE	E	E	E	ESE	ESE	ESE	E	E	E	E	E	E	ESE	E	E	ESE
Period(s) (?)	8	6	6	6	6	9	9	9	9	8	9	8	8	10	10	9	9	9	9	9	10
Wave Graph (?)
Energy (?)	23	27	24	23	23	27	20	56	82	91	93	113	77	95	79	62	61	56	43	60	121
Wind (km/h)	ESE	E	ESE	ENE	ENE	ESE	E	ESE	ENE	WNW	W	SW	SSE	SE	SE	ESE	SE	ESE	ESE	E	E
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross- on	cross- on	cross- on	cross- on	cross- on	cross- on	cross- on	cross- on	on	cross- off	cross- off	off	cross- off	cross	cross	cross	cross	cross	cross	cross- on	cross- on
High Tide / height (m)			8:55PM 1.97	9:14AM 1.79		9:18PM 1.93	9:48AM 1.66		9:41PM 1.86	10:27AM 1.52		10:05PM 1.78	11:25AM 1.38		10:35PM 1.69		1:56PM 1.30	11:23PM 1.58		5:05PM 1.44	1:36AM 1.51
Low Tide / height (m)		2:46PM 0.58		3:12AM 0.57	3:08PM 0.71		3:43AM 0.61	3:29PM 0.85		4:20AM 0.67	3:50PM 0.99		5:07AM 0.75	4:09PM 1.14		6:19AM 0.81	4:19PM 1.29		8:13AM 0.80		8:35PM 1.39

	Wednesday 27			Thursday 28			Friday 29			Saturday 30			Sunday 31			Monday 01			Tuesday 02
Sunrise	6:03	-	-	6:03	-	-	6:03	-	-	6:05	-	-	6:05	-	-	6:05	-	-	6:05	-	-
Sunset	-	6:52	-	-	6:52	-	-	6:51	-	-	6:50	-	-	6:47	-	-	6:46	-	-	6:45	-

Rain (mm)	-	-	-	-	-	1	2	2	-	-	-	-	-	-	-	1	-	-	-	1	-
Temp. °C	29	29	29	29	29	29	28	26	27	28	28	28	28	29	28	29	29	29	29	29	29
Feels °C (?)	32	32	32	31	31	31	30	29	29	31	32	32	31	31	31	31	31	32	32	32	32

Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)

Recent Eyeball Surf Reports for Okinawa

Wind Update Continuing clean conditions at Aha Rivermouth (light winds from the NNE at Nago 37 km from Aha Rivermouth). 0.3m 7s swell from the ESE with a 0.3m 4s local chop, also from the ESE and a 0.2m 6s windswell, also from the E as well as a 0.1m 8s swell, also from the ESE. 4 swells combining to make bigger set waves.
1 hour 7 minutes ago Aha Rivermouth

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37 km away, 1 h 7 min ago

7 km/h

NNE

0.0

29.8

Air / Water (°C)

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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Aha Rivermouth surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.

Information about the Aha Rivermouth Surf forecast

The above surf forecast table for Aha Rivermouth provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Aha Rivermouth can be found by selecting the local surf guide option on the grey menu. Our Aha Rivermouth surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Aha Rivermouth) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).

Further information to help with frequently asked questions about our surf forecast for Aha Rivermouth may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.

Aha Rivermouth is 31 km (19 miles) from the city of Okinawa. If you plan a holiday in Okinawa, look for hotels and other accommodation in Okinawa. Okinawa has rooms for a wide range of budgets as well as car hire and transport links.