
Surf Forecasts:
Tainohama surf forecast from 11 Aug 2026:
- Best quality surf: Tuesday 11 Aug, 6PM (local time) - 3ft (0.9m), 10s period, SSW swell with offshore winds.
- Most powerful swell: Tuesday 11 Aug, 12PM (local time) - 3.5ft (1.0m), 10s period, S swell with 212 kJ wave energy.
- Next surfable swell (1★+): Tuesday 11 Aug, 6PM (local time) - 3ft (0.9m), 10s period with SSW 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 Tuesday (Aug 11) at 6PM. The primary swell is predicted to be 0.9m and 10s period with a secondary swell of 0.5m and 11s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Tainohama in the next 16 days are 1.0m 10s and forecast to arrive on Tuesday (Aug 11) at 12PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 5s period and expected on Tuesday (Aug 11) at 3PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Tue 11th Aug) | 3ft (0.9m) 10s |
| Best Surf | 6PM (Tue 11th Aug) | 3ft (0.9m) 10s |
| Most Powerful | 12PM (Tue 11th Aug) | 3.5ft (1.0m) 10s |
Table - best surf conditions forecast for Tainohama over the next 16 days.
The Lowdown
G’day, I’m Rusty. Look, I’ve got to be straight with you – over the next fortnight or so, Tainohama is looking mostly like a flat spell you’d rather sleep through. The reef is exposed to the south, and while there’s a tiny pulse of energy on offer here and there, the conditions are mostly ordinary or poor. The water temp is sitting at 84°, bang on average for this time of year, which is nice if you’re just floating around.
Let’s start with Tuesday, August 11th. There’s a little 3ft south swell creeping in with a 10-second period, but the wind is a cross-offshore northerly at 25 km/h, and the combined energy is weak at 307. It’s clean but really just a sad little wave – you’re not missing anything. By Wednesday morning, August 12th, the swell drops to 2ft from the SSW, but here’s the kicker: glassy conditions. That’s a rare treat. It’s surfable but very ordinary – still, if you’re desperate, you could scratch out a few fun ones on that reef.
The rest of that week into the weekend is a write-off: onshore winds, choppy junk, and combined energy falling below 200. Saturday morning, August 15th, offers another glassy window with 2ft south swell, but it’s tiny and hardly worth paddling out for.
Monday, August 17th morning has a glassy start with 2ft south swell – again, surfable but ordinary. The combined energy is just 112 (weak). The real standout doesn’t arrive until much later. On Friday, August 21st morning, we get a glassy calm with 3ft south swell at 10 seconds, energy at 195 – still weak, but it’s clean and a little more juice. Then Saturday morning, August 22nd, offers 3ft south swell with a light cross-offshore northeast breeze at 5 km/h, energy at 194 – clean again.
But if you want the best on offer, you have to wait until Tuesday, August 25th. A 5ft south-southeast swell rolls in with a very long 14-second period – proper groundswell. The combined energy hits 407 (moderate). Problem is, the wind is a cross-onshore southerly at 25 km/h, and the conditions are described as poor. For a reef break, that long-period swell could actually wrap in nicely, but the wind is going to mess it up. This is the best size we see, but it’s not clean. Still, if you’re an expert and can handle lumpy conditions, there might be a few waves.
Into Wednesday, August 26th, the swell jumps to 6ft with a 13-second period, energy at 1426 (strong), but the wind is a fresh cross-onshore at 30 km/h – it’s going to be a mess. Too big for beginners, and with that wind, it’s only for the hardcore crew.
So, my pick is Tuesday, August 25th, for the biggest swell (5ft from SSE) and the longest period (14 seconds), but you’ll be fighting the wind. If you want clean, glassy waves, stick to the tiny mornings like August 12th or 15th. Tainohama is a reef break that’s fairly consistent, but this outlook is pretty bleak overall. The crowds here can be an issue sometimes, but I wouldn’t worry about that this fortnight – not much to crowd.
Rusty.
Short Range ForecastModerate rain (total 19mm), heaviest on Thu morning. Warm (max 29°C on Tue afternoon, min 23°C on Tue night). Winds decreasing (fresh winds from the N on Tue morning, calm by Tue night). | Days 4-6 Weather SummarySome drizzle, heaviest during Sat night. Warm (max 29°C on Sat morning, min 24°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map | |||||||||||||||||||||
Wave Height (m) Direction Period (s) | S 10 | SSW 10 | SSW 10 | SSW 10 | S 10 | S 9 | SSW 9 | SSW 9 | S 9 | S 9 | S 9 | S 8 | S 10 | S 9 | S 10 | S 10 | S 9 | S 9 | S 8 | SE 11 | SE 11 |
Wave Graph | |||||||||||||||||||||
216 | 173 | 173 | 92 | 87 | 83 | 88 | 86 | 79 | 78 | 76 | 52 | 92 | 81 | 94 | 92 | 83 | 56 | 52 | 36 | 35 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | glassy | on | glassy | cross-on | on | cross-on | on | cross-on | cross | glassy | cross-on | cross-on | on | on | cross | glassy | cross-on | cross-on |
High Tide | 5:46PM1.83m | 4:47AM1.87m | 6:13PM1.88m | 5:29AM1.95m | 6:38PM1.92m | 6:09AM2.00m | 7:03PM1.93m | 6:47AM2.00m | 7:28PM1.93m | 7:26AM1.97m | 7:52PM1.91m | 8:05AM1.88m | 8:18PM1.88m | ||||||||
Low Tide | 10:54AM0.28m | 11:15PM1.03m | 11:32AM0.23m | 11:48PM0.90m | 12:07PM0.22m | 00:20AM0.79m | 12:40PM0.26m | 00:51AM0.69m | 1:11PM0.34m | 1:24AM0.61m | 1:41PM0.46m | 1:58AM0.57m | 2:11PM0.61m | 2:35AM0.56m | |||||||
5:20 | — | — | 5:20 | — | — | 5:20 | — | — | 5:22 | — | — | 5:22 | — | — | 5:22 | — | — | 5:24 | — | — | |
— | 6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:50 | — | — | 6:49 | — | — | 6:47 | — | — | 6:46 | — | |
mm | — | — | — | 1 | 1 | 3 | 10 | 2 | 2 | — | — | — | — | — | 1 | — | — | — | — | — | — |
Temp °C | 28 | 29 | 24 | 26 | 26 | 25 | 26 | 27 | 25 | 28 | 28 | 25 | 29 | 29 | 26 | 29 | 29 | 27 | 30 | 29 | 26 |
Feels °C | 24 | 26 | 23 | 28 | 28 | 28 | 28 | 29 | 28 | 29 | 29 | 28 | 31 | 31 | 29 | 32 | 32 | 32 | 33 | 31 | 30 |
Swell 1 Height (m) Direction Period (s) | S 10 | SSW 10 | SSW 10 | S 9 | S 10 | S 9 | SSW 9 | SSW 9 | S 9 | S 9 | S 9 | S 8 | S 10 | S 9 | S 10 | S 10 | S 9 | S 9 | S 8 | S 8 | S 8 |
216 | 173 | 173 | 85 | 87 | 83 | 88 | 86 | 79 | 78 | 76 | 52 | 92 | 81 | 94 | 92 | 83 | 56 | 52 | 36 | 35 | |
Swell 2 Height (m) Direction Period (s) | E 11 | E 11 | E 11 | SSW 10 | SSW 10 | SW 10 | SE 12 | ESE 4 | ESE 4 | ESE 9 | ESE 9 | E 10 | SE 8 | ESE 10 | ESE 9 | ESE 9 | E 10 | E 10 | SE 11 | SE 11 | SE 11 |
63 | 57 | 35 | 92 | 58 | 25 | 23 | 3 | 3 | 29 | 15 | 30 | 17 | 33 | 48 | 66 | 65 | 49 | 42 | 30 | 30 | |
Swell 3 Height (m) Direction Period (s) | SE 13 | SE 13 | NE 4 | E 10 | E 10 | SE 12 | E 9 | SE 12 | E 10 | SE 11 | E 11 | SE 8 | E 10 | SE 8 | ESE 5 | SE 12 | SE 11 | SE 11 | ESE 10 | ESE 9 | SSE 7 |
28 | 27 | 5 | 19 | 19 | 24 | 7 | 22 | 16 | 19 | 20 | 11 | 17 | 23 | 5 | 48 | 44 | 42 | 18 | 8 | 5 | |
Wind waves Height (m) Direction Period (s) | NE 5 | NE 5 | N 4 | — | — | ESE 4 | ESE 4 | — | — | ESE 5 | SE 4 | — | — | — | — | — | — | SW 2 | WSW 2 | SW 2 | SW 3 |
29 | 53 | 13 | — | — | 6 | 3 | — | — | 5 | 2 | — | — | — | — | — | — | 1 | 1 | 1 | 3 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 21 | 27 | 0 | 0 | 451 | 0 | 64 | 3 | 3 | 3 | 32 | 3 | 0 | 32 | 3 | 3 | 3 | 2 | 0 | 3 | 21 |
Best forecast wave conditions in Shikoku | |||||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||||
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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.











