Tainohama Surf Break

Lat Long: 33.74° N 134.57° E

Tainohama Surf Forecast and Surf Report

Issued: 2 pm 05 Aug 2026 (local time)

Forecast update in  hr  min

Today's Tainohama sea temperature is
29.0° C
1.4° 

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


Tainohama surf forecast from 5 Aug 2026:

  • Best quality surf: Wednesday 5 Aug, 9PM (local time) - 15ft (4.5m), 15s period, SE swell with glassy winds.
  • Most powerful swell: Thursday 6 Aug, 6PM (local time) - 16ft (5.0m), 15s period, SSE swell with 9,643 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 5 Aug, 9PM (local time) - 15ft (4.5m), 15s period with SE swell.

Best Forecast Surf Conditions for Tainohama this week:

The surf forecast for Tainohama over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Aug 05) at 9PM. The primary swell is predicted to be 4.5m and 15s period. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Tainohama in the next 16 days are 5.0m 15s and forecast to arrive on Thursday (Aug 06) at 6PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Wednesday (Aug 12) at 3AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Wed 5th Aug)15ft (4.5m) 15s
Best Surf 9PM (Wed 5th Aug)15ft (4.5m) 15s
Most Powerful 6PM (Thu 6th Aug)16ft (5.0m) 15s

Table - best surf conditions forecast for Tainohama over the next 16 days.


The Lowdown

Alright folks, Rusty here. We’ve got one spot on the radar for this 16-day stretch, and it’s a special one, but we’ve got to be patient through a long, quiet spell to get to the good stuff.

The overall pattern is a story of two halves. A massive, powerful swell rolls in mid-week, but it’s accompanied by challenging winds. The real magic, the kind that gets you out of bed before dawn, is tucked away in the second week.

Let’s start with the first pulse. On Wednesday, August 5th, a very large 15ft swell from the SE is hitting Tainohama (Japan). The energy is extreme (10672), but conditions are marginal due to a cross-on light breeze. This is expert territory only—way too big for most. The following morning, Thursday the 6th, is the standout of this first window. The swell holds at 15ft from the SE, but the wind shifts to a clean, cross-off NE breeze. The water is a touch warmer than normal at 84°. This is exceptional surf, but with that size and that long 16-second period (groundswell), it’s going to be a heavy, powerful wave that’s best suited for a reef like this. It’s a raw, challenging session for the brave.

Conditions deteriorate after that. Friday the 7th through to the end of the first week sees the swell drop but onshore winds and even storm risks chop it up. The combined energy drops from 7718 down to 1640 by Monday the 10th, and the quality is poor. There’s a real gap here of several days with nothing worth paddling out for.

We then hit a long, flat spell. From around Tuesday the 11th through to Sunday the 16th, the swell is small, mostly 3ft or under, and the energy is weak (hundreds, not thousands). There are a few clean mornings, like Saturday the 15th with glassy conditions, but the waves are tiny. It’s a waiting game.

Then, the second week brings the real highlight. On Tuesday morning, August 18th, the swell starts to rebuild with a clean 5ft from the ESE and light offshore winds. But the payoff is Wednesday morning, August 19th. A solid 12ft swell from the E arrives, with a 10-second period and a combined energy of 3507. The wind is a light, offshore NE breeze. This is excellent surf for experienced surfers. It’s still a serious size, but the conditions will be clean and powerful. The swell direction is looking good for the reef. This is the one to circle on your calendar.

The energy backs off a bit into Thursday the 20th, but there’s still a decent 6ft swell from the S with a 13-second period and clean winds. It’s a great follow-up session.

So, to sum it up: the first few days are for the big-wave pros only. The long middle is a dud. But the best on offer is undeniably the Wednesday morning, August 19th, at Tainohama. That’s your window.

Rusty.

Short Range Forecast

Heavy rain (total 51mm), heaviest during Fri night. Warm (max 31°C on Wed afternoon, min 26°C on Wed night). Wind will be generally light.

Days 5-7 Weather Summary

Moderate rain (total 10mm), heaviest on Sun afternoon. Warm (max 29°C on Sat afternoon, min 25°C on Mon night). Wind will be generally light.

Wed
5
Thursday
6
Friday
7
Saturday
8
Sunday
9
Monday
10
Tuesday
11
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
8
9
9
7
8
5
0
0
2
0
3
3
0
2
0
1
3
2
0
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
4.5
SE
16
4.5
SE
15
4.5
SE
14
4.5
SE
15
4.5
SSE
14
4.5
SSE
14
4.5
SSE
14
3
S
13
2.5
SSW
13
2.4
SSW
14
2.3
SSW
14
2.5
S
14
2.1
SSW
14
2.3
S
13
1.4
SW
14
2.1
S
13
1.6
S
11
1.7
SSW
12
1.6
SSW
12
1.5
SSW
11
Wave Graph
Metric surfscale
Energy kJ
10672
8711
8359
9312
8039
7469
6815
3398
2507
2119
2048
3022
1704
1862
754
1533
617
876
755
531
Wind (km/h)
10
ESE
0
NNE
15
NE
15
ESE
10
ENE
15
E
25
SE
20
ESE
15
E
25
SSE
10
ESE
15
E
20
SE
10
ESE
20
ESE
20
SSE
10
SSE
10
S
20
S
15
SW
Wind State
cross-on
glassy
cross-off
cross-on
cross
cross-on
cross-on
cross-on
cross-on
on
cross-on
cross-on
on
cross-on
cross-on
on
on
cross-on
cross-on
cross-on
High Tide
10:01PM1.71m
11:52AM1.41m
10:46PM1.65m
2:17PM1.41m
11:57PM1.59m
3:58PM1.53m
1:36AM1.59m
4:44PM1.65m
2:58AM1.66m
5:17PM1.75m
3:58AM1.76m
5:46PM1.83m
Low Tide
3:50PM1.00m
5:07AM0.69m
4:36PM1.17m
6:32AM0.68m
6:10PM1.32m
8:05AM0.61m
8:34PM1.34m
9:18AM0.49m
9:53PM1.26m
10:11AM0.37m
10:39PM1.15m
10:54AM0.28m
11:15PM1.03m
clear
clear
clear
clear
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
clear
thunderstorm
thunderstorm
thunderstorm
thunderstorm
part cloud
part cloud
part cloud
part cloud
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:16
5:16
5:16
5:18
5:18
5:20
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:59
6:58
6:57
6:55
6:54
6:53
6:52
 mm
10
9
10
20
2
1
2
3
4
Temp °C
31
27
30
31
27
28
28
27
29
29
26
28
28
26
28
28
26
29
29
26
Feels °C
34
31
33
34
30
31
29
29
30
29
30
30
29
29
28
28
28
31
30
28
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  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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Information about the Tainohama Surf forecast

The above surf forecast table for Tainohama provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Tainohama can be found by selecting the local surf guide option on the grey menu. Our Tainohama 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 (Tainohama) 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 Tainohama 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.

Tainohama is 21 km (13 miles) from Anan. If you plan a holiday in Shikoku, look for hotels and other accommodation in Anan. Anan has rooms for a wide range of budgets as well as car hire and transport links.

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