Surf Forecasts:
Tainohama surf forecast from 25 Aug 2026:
- Best quality surf: Friday 28 Aug, 3AM (local time) - 4.5ft (1.3m), 8s period, SSW swell with glassy winds.
- Most powerful swell: Tuesday 25 Aug, 6PM (local time) - 10ft (3.0m), 13s period, SSE swell with 2,986 kJ wave energy.
- Next surfable swell (1★+): Friday 28 Aug, 12AM (local time) - 4ft (1.2m), 9s 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 12AM. The primary swell is predicted to be 1.2m and 9s period with a secondary swell of 1.1m and 9s. Another secondary swell of 0.7m and 9s 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 3.0m 13s and forecast to arrive on Tuesday (Aug 25) at 6PM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Fri 28th Aug) | 4ft (1.2m) 9s |
| Best Surf | 3AM (Fri 28th Aug) | 4.5ft (1.3m) 8s |
| Most Powerful | 6PM (Tue 25th Aug) | 10ft (3.0m) 13s |
Table - best surf conditions forecast for Tainohama over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's break down what's coming for Tainohama over the next couple of weeks. We've got some proper energy on the charts, but it's a tale of two weeks with a few golden windows if you get the timing right.
The first few days are a write-off. From Tuesday the 25th right through to the end of the month, we're looking at a block of marginal to poor conditions. The swell is dropping and the wind is mostly a messy cross-onshore, making for choppy, lumpy lineups. You'll see a big pulse of energy from a powerful SSE groundswell on Tuesday, with combined energy hitting 4834, but the cross-on wind just kills any chance of it offering a clean wave. We’re looking at a blank run until the start of September.
The first real sign of life comes on Friday, the 28th of August. It's not big, only around 4ft of short-period SSE swell, but the wind swings to a glassy W in the morning. That's the key. The water is sitting at a warm 84°F, about a degree or so above normal, so it's a touch warmer than average for this time of year. This does give you a clean, workable wave, but it's a window of opportunity rather than a standout.
The highlight window, and the only one I'm getting excited about, is Saturday morning, the 29th of August. The wind drops to a dead calm 0 km/h, creating pure glassy conditions on the reef. We've got a clean 4ft of SSW groundswell. It's a small but absolutely perfect day for an advanced crew at Tainohama. The waves will be clean, lined up, and with no wind, it's going to be a dream out there. This is the one to circle on the calendar. It will likely be crowded, as Tainohama can get busy on its good days.
After that Saturday morning, things go a bit quiet and patchy again. There's a definite gap from Saturday afternoon through the start of September with very little to recommend. Early September sees some more swell fill in, but the wind is back on it, creating cross-onshore conditions through most of the first week of September.
A late pulse of energy arrives on Monday, the 7th of September. We're looking at 6ft to 8ft of longer-period ESE swell. This is a solid groundswell with plenty of energy, but the direction is off for Tainohama's optimum. The morning of the 7th has a light onshore wind, which is a bit messy, but it's worth watching. This swell is big enough to have some push but still manageable. If the wind cleans up further, there could be a session. As it stands, it’s promising but uncertain.
The second week overall is a mixed bag of small waves and poor wind, with only that late Monday window offering any real potential. Keep an eye on Saturday the 29th – that's the gem. Get out on Saturday the 29th and enjoy it while it lasts.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Thu night. Warm (max 31°C on Thu morning, min 26°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 23mm), heaviest during Sat afternoon. Warm (max 30°C on Sun morning, min 26°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | |||||||||||||||
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) | SSE 14 | SSE 13 | SSE 12 | S 11 | S 12 | SSW 11 | SSW 10 | SSE 10 | SSW 9 | S 8 | S 8 | S 7 | SSW 8 | SSW 7 | SSW 8 | S 8 | SE 10 | SE 10 | SSW 9 | SSE 10 | SSE 10 |
Wave Graph | |||||||||||||||||||||
3875 | 2005 | 1961 | 1107 | 699 | 394 | 194 | 214 | 207 | 217 | 157 | 85 | 128 | 97 | 75 | 55 | 36 | 39 | 47 | 69 | 83 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross-on | glassy | glassy | glassy | off | glassy | cross-on | cross-off | glassy | cross-on | cross-on | cross-on | on | cross-on |
High Tide | 5:17PM1.80m | 4:23AM1.82m | 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 | ||||||||
Low Tide | 10:26AM0.38m | 10:50PM1.03m | 11:05AM0.31m | 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 | |||||||
5:28 | — | — | 5:30 | — | — | 5:31 | — | — | 5:31 | — | — | 5:31 | — | — | 5:33 | — | — | 5:33 | — | — | |
— | 6:37 | — | — | 6:36 | — | — | 6:35 | — | — | 6:32 | — | — | 6:31 | — | — | 6:30 | — | — | 6:29 | — | |
mm | — | — | — | 1 | — | — | — | — | 3 | 2 | 1 | 1 | — | 9 | 2 | — | 5 | 3 | 1 | 1 | — |
Temp °C | 30 | 29 | 26 | 30 | 30 | 27 | 31 | 31 | 27 | 27 | 27 | 26 | 29 | 29 | 27 | 30 | 29 | 27 | 29 | 29 | 26 |
Feels °C | 32 | 32 | 30 | 32 | 32 | 30 | 32 | 32 | 31 | 32 | 32 | 31 | 33 | 33 | 32 | 34 | 33 | 31 | 32 | 32 | 30 |
Swell 1 Height (m) Direction Period (s) | SSE 14 | SSE 13 | SSE 12 | S 11 | S 12 | SSW 11 | SSE 8 | SSE 10 | S 9 | SSW 8 | S 8 | S 7 | S 7 | ESE 9 | SSW 8 | S 8 | S 7 | S 8 | SSW 9 | SSE 10 | SSE 10 |
3875 | 2005 | 1961 | 1107 | 699 | 394 | 194 | 214 | 203 | 107 | 157 | 85 | 70 | 17 | 75 | 55 | 28 | 32 | 45 | 69 | 83 | |
Swell 2 Height (m) Direction Period (s) | E 15 | S 15 | E 13 | E 13 | SSE 9 | SSE 9 | SSW 10 | E 11 | SSW 9 | SSE 8 | SE 10 | SSE 8 | SE 10 | SSW 10 | SE 11 | SE 10 | SE 10 | SE 10 | SSE 11 | SSW 9 | SSE 12 |
17 | 1310 | 32 | 30 | 216 | 186 | 194 | 10 | 65 | 96 | 15 | 11 | 14 | 10 | 19 | 17 | 36 | 39 | 47 | 30 | 82 | |
Swell 3 Height (m) Direction Period (s) | S 18 | E 14 | — | SE 15 | E 13 | E 12 | SSE 11 | SE 16 | E 11 | SE 10 | SW 11 | SSE 9 | E 10 | SSE 9 | ESE 9 | SW 10 | SW 9 | SW 8 | SSE 6 | S 9 | SSW 8 |
942 | 16 | — | 8 | 29 | 25 | 25 | 10 | 9 | 24 | 18 | 8 | 7 | 8 | 8 | 16 | 21 | 11 | 4 | 2 | 28 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | SSW 10 | SSW 9 | S 8 | — | SW 8 | SSW 8 | SSW 7 | SW 5 | — | — | — | — | — | — |
— | — | — | — | — | — | — | 192 | 207 | 217 | — | 69 | 128 | 97 | 35 | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 3 | 3 | 3 | 3 | 51 | 3 | 3 | 32 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 0 | 3 | 3 | 3 | 3 | 3 |
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.











