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 8 pm Wednesday 15 Oct 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 29.2° C
(Which is 2.3°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 Monday (Oct 20) at 9PM. The primary swell is predicted to be 1.7m and 10s period with a secondary swell of 0.4m and 11s. Another secondary swell of 1.6m and 6s is also forecast. 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 3.0m 10s and forecast to arrive on Wednesday (Oct 22) at 3AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 7s period and expected on Monday (Oct 20) at 6PM.

Wave Type	Time (JST) & Date	Wave Height & Period
Next good surf (1 star+)	9PM (Mon 20th Oct)	5.5ft (1.7m) 10s
Best Surf	9PM (Mon 20th Oct)	5.5ft (1.7m) 10s
Most Powerful	3AM (Wed 22nd Oct)	10ft (3.0m) 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 Some drizzle, heaviest during Wed night. Warm (max 28°C on Wed night, min 27°C on Wed night). Wind will be generally light.										Days 3-6 Weather Summary Heavy rain (total 88mm), heaviest during Mon afternoon. Warm (max 28°C on Sat night, min 24°C on Sun night). Winds decreasing (fresh winds from the E on Mon morning, calm by Tue afternoon).
		Thursday 16			Friday 17			Saturday 18			Sunday 19			Monday 20			Tuesday 21			Wed 22
	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM
Rating (10 max)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	3	3	3	0	0	0
Swell Height Map See all maps
Wave Height (m) & direction (?)	NE	NE	NE	E	E	E	ENE	ESE	ESE	ESE	ESE	ESE	ESE	NNW	NNW	NNW	NNW	NNW	N	N	NNE
Period(s) (?)	11	10	9	4	5	6	11	7	7	8	8	8	8	9	10	10	10	9	10	9	9
Wave Graph (?)
kJ (?)	29	24	25	29	52	62	82	105	93	207	331	179	179	261	394	522	471	336	891	614	969
Wind (km/h)	ESE	E	ENE	E	ENE	E	ESE	E	E	E	E	ESE	E	E	E	SW	S	WNW	NE	NNE	NE
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross- on	cross- on	on	cross- on	cross- on	cross- on	cross- on	cross- on	cross- on	cross- on	cross- on	cross- on	cross- on	cross- on	cross- on	off	cross- off	glass	on	on	on
High Tide / height (m)	2:06AM 1.46		4:09PM 1.62		3:42AM 1.55	4:45PM 1.71		4:41AM 1.66	5:14PM 1.79		5:26AM 1.75	5:39PM 1.85		6:03AM 1.80		6:03PM 1.89	6:35AM 1.82		6:24PM 1.91	7:06AM 1.81
Low Tide / height (m)		9:07AM 0.60		10:03PM 0.97	10:09AM 0.57		10:48PM 0.78	10:54AM 0.55		11:23PM 0.61	11:30AM 0.56		11:55PM 0.47		12:01PM 0.58	12:23AM 0.37		12:27PM 0.63	12:49AM 0.30		12:50PM 0.68

		Thursday 16			Friday 17			Saturday 18			Sunday 19			Monday 20			Tuesday 21			Wed 22
Sunrise	-	6:26	-	-	6:26	-	-	6:26	-	-	6:26	-	-	6:28	-	-	6:28	-	-	6:28	-
Sunset	-	-	5:58	-	-	5:57	-	-	5:55	-	-	5:54	-	-	5:53	-	-	5:52	-	-	5:52

Rain (mm)	1	-	-	-	-	-	-	-	-	3	3	10	13	11	16	19	6	7	20	2	2
Temp. °C	28	28	28	28	28	28	28	28	28	28	28	27	26	24	24	24	25	25	26	27	27
Feels °C (?)	30	31	30	29	27	28	28	30	30	30	29	29	28	23	24	27	29	29	21	24	24

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 E at Nago 37 km from Aha Rivermouth). 0.5m 4s local chop from the E with a 0.4m 10s swell from the ENE and a 0.2m 7s swell from the N. 3 swells combining to make bigger set waves.
49 minutes ago Aha Rivermouth

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37 km away, 49 min ago

6 km/h

0.0

29.2

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.