Mainside Surf Forecast

/ Okinawa (32 surf breaks) /

Japan (129 surf breaks)

Surf Forecasts:

Mainside surfForecast / Okinawa / Japan

48hr Weather and Surf, issued 8 am Wednesday 15 Oct 2025 JST

Forecast update in hr min s Forecast update imminent

Mainside surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.

Today's Mainside sea temperature is 29.3° C
(Which is 2.3°C warmer than normal for this time of year)

How big are the waves at Mainside today?

The current surf forecast for Mainside at 1PM is: 0.1m 8s primary swell from a Northeast direction and 0.1m 5s secondary swell from a North direction (forecast issued at 08:00am October 15). An open ocean swell of 0.2m 8s is not directed at the surf break, a second open ocean swell of 0.4m 3s is not directed at the surf break. The wind direction is predicted to be offshore.

Time (JST) & Date	Wave Height	Wave Period
Morning (15 Oct)	0.5ft (0.1m)	8s
Afternoon (15 Oct)	0.5ft (0.1m)	10s
Evening (15 Oct)	0.5ft (0.1m)	7s

Table - waves today at Mainside. (Swell directed towards the surf break)

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

	Wednesday 15						Thursday 16								Friday 17								Sat 18
	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	0 AM	3 AM
Rating (10 max)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Swell Height Map See all maps
Wave Height (m) & direction (?)	NE	NE	NE	E	NE	E	E	NNW	NNW	E	NNW	N	E	E	E	E	E	E	E	NE	NE	ENE	ENE	ENE
Period(s) (?)	8	8	8	10	8	8	10	6	6	7	6	8	9	9	9	9	9	9	8	12	12	12	12	12
Wave Graph (?)
kJ (?)	3	3	3	3	3	2	2	4	4	4	3	5	7	7	7	6	6	7	7	6	6	14	13	13
Wind (km/h)	ENE	E	E	E	E	E	E	ESE	E	E	NE	ENE	ENE	ENE	ENE	ENE	ENE	ENE	E	E	E	E	E	E
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross- off	cross- off	cross- off	off	off	off	off	off	off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	off	cross- off	cross- off	off	off
High Tide / height (m)					3:47PM 1.62			2:46AM 1.55					4:42PM 1.72				4:19AM 1.65				5:20PM 1.81
Low Tide / height (m)		8:14AM 0.62					9:26PM 1.19				9:44AM 0.62				10:39PM 0.99				10:48AM 0.59				11:25PM 0.79

	Wednesday 15						Thursday 16								Friday 17								Sat 18
Sunrise	-	6:26	-	-	-	-	-	-	-	6:28	-	-	-	-	-	-	-	6:28	-	-	-	-	-	-
Sunset	-	-	-	-	6:01	-	-	-	-	-	-	-	6:00	-	-	-	-	-	-	-	6:00	-	-	-

Rain (mm)	-	-	-	-	-	-	-	-	1	1	-	2	1	-	-	-	-	-	-	-	-	-	-	-
Temp. °C	26	27	29	29	28	27	27	27	27	27	29	28	28	27	27	27	27	27	28	29	28	27	27	27
Feels °C (?)	28	28	32	32	30	29	29	30	31	30	33	30	30	29	29	28	28	27	29	30	29	28	27	29

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 The wind is still cross-off at Mainside (moderate winds from the ENE at Kadena Air Force Base Airport 11 km from Mainside). 0.2m 3s local chop from the NNE with a 0.2m 5s windswell from the NNW and a 0.1m 10s swell from the E. 3 swells combining to make bigger set waves.
2 hours 14 minutes ago Mainside

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2 h 14 min ago

20 km/h

ENE

Cross-Off

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