Surf Forecasts:
Tainohama surf forecast from 26 Aug 2026:
- Best quality surf: Saturday 29 Aug, 6AM (local time) - 3.5ft (1.1m), 8s period, SSW swell with glassy winds.
- Most powerful swell: Wednesday 2 Sep, 9PM (local time) - 13ft (4.0m), 11s period, SSE swell with 3,790 kJ wave energy.
- Next surfable swell (1★+): Friday 28 Aug, 3PM (local time) - 3ft (0.9m), 8s 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 Friday (Aug 28) at 3PM. The primary swell is predicted to be 0.9m and 8s period with a secondary swell of 0.7m and 8s. Another secondary swell of 0.2m and 10s is also forecast. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Tainohama in the next 16 days are 4.0m 11s and forecast to arrive on Wednesday (Sep 02) at 9PM. Winds are predicted to be onshore at the time the swell arrives.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3PM (Fri 28th Aug) | 3ft (0.9m) 8s |
| Best Surf | 6AM (Sat 29th Aug) | 3.5ft (1.1m) 8s |
| Most Powerful | 9PM (Wed 2nd Sep) | 13ft (4.0m) 11s |
Table - best surf conditions forecast for Tainohama over the next 16 days.
The Lowdown
Alright, let’s break it down. The next couple of weeks here at Tainohama are a real mixed bag. It’s a reef setup, so it needs the right direction, and this south swell window is lining up. We’ve got a pretty quiet start, but the end of the run is where the magic is shaping up.
We kick things off with some size but messy conditions. Wednesday the 26th has a 7ft south swell (11 seconds), but with a cross-on wind from the SSW at 9 mph, it’s choppy and not worth paddling out for. The combined swell energy is high, at 1044 (moderate energy), but the wind just ruins it. That afternoon it drops to 5ft and gets even windier. Thursday and Friday stay small and onshore – nothing doing.
The first real glimmer comes late Friday afternoon, the 28th. We’ve got a tiny 3ft swell from the SSW (8 seconds), but the wind goes glassy. It’s small, but for a patient surfer on a longboard, it’s clean. That glassy spell hangs into Saturday morning the 29th, still with that same small 3ft swell. It’s not going to light the world on fire, but it’s surfable and clean. The combined energy is weak (135).
Then things go flat and quiet from Saturday afternoon all the way through the end of the first week of September. There’s a brief spike in energy on September 1st with a 3ft, 13-second south swell that builds to 5ft, but the wind is howling onshore (19 mph) and it’s a stormy mess. That trend continues – we get big, dangerous swell on September 2nd and 3rd with waves up to 10ft and very strong combined energy (over 4000), but it’s all onshore, stormy, and closed out. This is not paddle surfing – that’s kite territory if anything.
Now, the standout. Mark your calendar for Monday, September 7th. After all that stormy chaos, it clears right up. We get a solid 13ft swell from the SSE (13 seconds – long period groundswell) with a light offshore wind from the NE at 6 mph. The combined energy is massive at 5794 (very strong). This is a serious, powerful groundswell, and at a reef like Tainohama, it’s going to produce some epic, grinding waves. This is for experts only – way too big for beginners. The crowd factor here is “sometimes,” so get out there early. The water temperature is around 84°, which is about 2° warmer than average for the time of year – a little warmer than usual, but not crazy.
Tuesday the 8th holds the energy with another 13ft SSE swell (12 seconds) and clean offshore wind from the NNW at 9 mph. The combined energy is even higher at 7079. Another incredible day for the experienced crew. Wednesday the 9th still has 10ft SSE swell with glassy conditions in the morning – that’s a dreamy window. The swell slowly drops through the rest of the week, but remains clean and surfable.
So, the bottom line: don’t bother paddling out this week. It’s a washout. But if you can wait, the 7th, 8th, and 9th of September are the absolute cream of the crop. Big, clean, powerful south groundswell at Tainohama. That’s the one.
Rusty.
Short Range ForecastLight rain (total 8mm), mostly falling on Fri afternoon. Warm (max 31°C on Thu morning, min 25°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 22mm), heaviest during Tue morning. Warm (max 30°C on Sat afternoon, min 26°C on Sat night). Wind will be generally light. | |||||||||||||||||||
Wed 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | ||||||||||||||
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 11 | SSW 11 | SSW 10 | SSE 10 | SSW 9 | SSW 8 | SSW 8 | S 8 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | S 8 | SSE 11 | SSE 10 | SSE 9 | SSE 12 | SSE 12 | SSE 13 |
Wave Graph | ||||||||||||||||||||
565 | 308 | 378 | 179 | 238 | 116 | 94 | 71 | 73 | 76 | 71 | 57 | 55 | 64 | 170 | 227 | 207 | 1435 | 2136 | 2560 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | glassy | cross | glassy | cross-on | cross-on | glassy | cross-on | cross-on | glassy | on | cross-on | cross-on | cross-on | cross-on |
High Tide | 5:43PM1.86m | 5:06AM1.93m | 6:07PM1.91m | 5:46AM2.00m | 6:31PM1.94m | 6:23AM2.03m | 6:55PM1.95m | 7:00AM2.02m | 7:18PM1.94m | 7:38AM1.95m | 7:42PM1.92m | 8:17AM1.84m | 8:07PM1.88m | |||||||
Low Tide | 11:22PM0.88m | 11:40AM0.28m | 11:52PM0.74m | 12:12PM0.30m | 00:23AM0.62m | 12:43PM0.37m | 00:54AM0.53m | 1:12PM0.47m | 1:26AM0.48m | 1:41PM0.60m | 2:00AM0.46m | 2:09PM0.76m | 2:38AM0.48m | |||||||
— | — | 5:31 | — | — | 5:31 | — | — | 5:31 | — | — | 5:33 | — | — | 5:33 | — | — | 5:33 | — | — | |
6:36 | — | — | 6:35 | — | — | 6:32 | — | — | 6:31 | — | — | 6:30 | — | — | 6:29 | — | — | 6:28 | — | |
mm | — | — | — | — | — | 1 | 6 | 1 | — | 3 | — | — | 1 | 1 | — | — | 6 | 11 | 13 | 29 |
Temp °C | 30 | 27 | 31 | 30 | 27 | 30 | 27 | 26 | 29 | 30 | 27 | 30 | 29 | 27 | 29 | 30 | 27 | 27 | 27 | 27 |
Feels °C | 31 | 30 | 32 | 31 | 29 | 35 | 32 | 31 | 33 | 34 | 31 | 33 | 32 | 32 | 33 | 32 | 31 | 29 | 28 | 27 |
Swell 1 Height (m) Direction Period (s) | S 11 | SSW 11 | SSE 9 | SSE 10 | S 9 | SSE 8 | SSE 8 | S 8 | SE 10 | ESE 9 | SE 11 | SSW 7 | SE 10 | S 8 | SSE 11 | SSE 10 | SSE 9 | SSE 12 | E 12 | SSE 13 |
565 | 308 | 206 | 179 | 203 | 58 | 52 | 71 | 14 | 8 | 19 | 57 | 36 | 64 | 170 | 227 | 207 | 1435 | 3 | 2560 | |
Swell 2 Height (m) Direction Period (s) | SSE 9 | SSE 9 | SSW 10 | E 11 | SSW 9 | SE 10 | SSE 10 | SE 9 | E 10 | SSE 9 | ESE 9 | SE 10 | S 13 | SE 10 | SSW 8 | S 15 | S 14 | E 13 | — | E 11 |
249 | 181 | 154 | 10 | 44 | 15 | 10 | 14 | 7 | 8 | 8 | 17 | 3 | 28 | 22 | 41 | 132 | 3 | — | 10 | |
Swell 3 Height (m) Direction Period (s) | E 13 | E 12 | SSE 11 | SE 16 | SW 8 | ESE 11 | E 11 | ESE 8 | SSE 13 | SE 13 | SSE 9 | ESE 10 | SW 10 | S 12 | SW 10 | SSW 9 | SSW 8 | — | — | — |
29 | 25 | 25 | 10 | 25 | 23 | 9 | 7 | 17 | 7 | 8 | 9 | 4 | 25 | 4 | 8 | 7 | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | SSW 10 | SSW 9 | SSW 9 | SSW 8 | SSW 8 | — | SSW 7 | SSW 7 | SSW 7 | SW 4 | SSW 7 | SSW 4 | — | — | — | — | SSE 12 | — |
— | — | 378 | 133 | 238 | 116 | 94 | — | 73 | 76 | 71 | 22 | 55 | 11 | — | — | — | — | 2136 | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 460 | 3 | 3 | 32 | 3 | 3 | 0 | 3 | 0 | 36 | 3 | 0 | 36 | 3 | 0 | 3 | 77 | 482 | 482 | 420 |
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.











