Surf Forecasts:
Tainohama surf forecast from 18 Aug 2026:
- Best quality surf: Tuesday 25 Aug, 6PM (local time) - 5.5ft (1.7m), 13s period, SE swell with cross-offshore winds.
- Most powerful swell: Tuesday 25 Aug, 6PM (local time) - 5.5ft (1.7m), 13s period, SE swell with 1,006 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 6AM (local time) - 1.5ft (0.4m), 10s 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 Thursday (Aug 20) at 6AM. The primary swell is predicted to be 0.4m and 10s period with a secondary swell of 0.4m and 7s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Tainohama in the next 16 days are 1.7m 13s and forecast to arrive on Tuesday (Aug 25) at 6PM. Winds are predicted to be cross-offshore at the time the swell arrives.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Thu 20th Aug) | 1.5ft (0.4m) 10s |
| Best Surf | 6PM (Tue 25th Aug) | 5.5ft (1.7m) 13s |
| Most Powerful | 6PM (Tue 25th Aug) | 5.5ft (1.7m) 13s |
Table - best surf conditions forecast for Tainohama over the next 16 days.
The Lowdown
G’day, I’m Rusty. Let’s have a look at what’s heading for Tainohama.
Right now, there’s not a lot doing. Tuesday the 18th through to Thursday the 20th are all pretty ordinary – we’ve got tiny, weak swell with onshore winds that just won’t clean it up. Nothing worth paddling out for. Friday the 21st morning shows a bit of promise though: a glassy morning with a moderate energy pulse (202) from the south at 3ft. That south swell direction lines up nicely for Tainohama’s optimum. It’s a reef break, fairly consistent, but it’s an advanced wave, so only for those who know what they’re doing. Crowds can be around sometimes. Water temp is sitting at 83°, which is about 2° warmer than normal – not a big deal, just a touch on the warm side.
Friday afternoon the wind swings cross-on and chops it up, so surf that morning if you can.
The real standout is the last week of August into early September. The big stuff starts building from Monday the 24th with a long-period groundswell (16 seconds) coming from the southeast. That’s a solid energy jump (731 in the morning, 1381 in the afternoon). The swell is up to 5ft but with onshore winds, it’s not ideal yet.
Then Tuesday the 25th morning – glassy conditions, swell hitting 8ft from the southeast with a long 16-second period. That’s proper groundswell, packing heaps of energy (3755). This is expert territory – way too big for beginners. The reef setup should handle that long period well, but be aware that long-period swell can make beach breaks close out. Tainohama’s a reef, so expect clean, well-shaped lines.
Wednesday the 26th is where it gets next level. Morning sees a cross-offshore breeze from the NNE, 10ft swell from the southeast, and massive energy (5315). By afternoon, it jumps to 13ft from the SSE, 17-second period, and clean conditions with a light offshore flow. That’s the best session on offer – exceptional surf for experts, with the highest quality score in the whole run. Crowds might show up, but for waves like that, it’s worth sharing.
Thursday the 27th holds big, clean swell – 13ft to 15ft from the SSE, still with clean cross-off winds. The energy is huge (9356 in the morning). This is still only for experienced surfers. Friday the 28th brings proper offshore winds from the NNW, with 13ft swell dropping to 12ft through the day. Excellent conditions, but again, big and powerful.
Into the first days of September, the swell starts to ease back a bit. Monday September 1st still has 8ft to 7ft from the southeast and ESE, with clean conditions. Wednesday September 2nd brings a shift – swell from the SSW at 8ft, with a gentle offshore wind. That’s a nice change of direction and still solid for experienced surfers.
Overall, the first week is a bust, but from the 24th onwards it’s all on – with Wednesday 26th afternoon being the absolute standout. Just remember, this is expert-only territory once the swell goes over 8ft. If you’re not comfortable in big, powerful waves on a reef, sit this one out.
Rusty.
Short Range ForecastSome drizzle, heaviest during Tue afternoon. Warm (max 29°C on Thu morning, min 25°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 29°C on Fri afternoon, min 25°C on Fri night). Wind will be generally light. | |||||||||||||||||||
Tue 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | ||||||||||||||
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) | SE 5 | SE 8 | ESE 8 | ESE 8 | SE 10 | SE 10 | SE 10 | S 9 | S 9 | S 10 | S 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SW 9 |
Wave Graph | ||||||||||||||||||||
36 | 69 | 56 | 51 | 29 | 25 | 25 | 99 | 101 | 190 | 173 | 141 | 149 | 116 | 90 | 88 | 86 | 70 | 94 | 90 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | cross-on | cross-on | on | cross-on | on | cross-on | cross-on | on | cross-on | cross-on | on | on | cross | on | on | cross-on |
High Tide | 8:45PM1.83m | 9:37AM1.62m | 9:13PM1.77m | 10:45AM1.47m | 9:48PM1.69m | 12:49PM1.39m | 10:41PM1.61m | 3:26PM1.47m | 00:26AM1.55m | 4:19PM1.60m | 2:18AM1.59m | 4:51PM1.71m | ||||||||
Low Tide | 3:17AM0.58m | 3:10PM0.96m | 4:09AM0.63m | 3:44PM1.13m | 5:20AM0.68m | 4:37PM1.30m | 7:01AM0.68m | 7:27PM1.39m | 8:35AM0.60m | 9:25PM1.30m | 9:39AM0.48m | 10:14PM1.17m | ||||||||
— | — | 5:24 | — | — | 5:26 | — | — | 5:26 | — | — | 5:26 | — | — | 5:28 | — | — | 5:28 | — | — | |
6:45 | — | — | 6:44 | — | — | 6:43 | — | — | 6:42 | — | — | 6:40 | — | — | 6:39 | — | — | 6:37 | — | |
mm | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 26 | 28 | 28 | 26 | 29 | 28 | 26 | 29 | 29 | 26 | 29 | 29 | 26 | 29 | 29 | 25 | 29 | 29 | 26 |
Feels °C | 29 | 29 | 30 | 31 | 30 | 32 | 30 | 30 | 31 | 31 | 29 | 31 | 31 | 29 | 31 | 31 | 29 | 32 | 32 | 30 |
Swell 1 Height (m) Direction Period (s) | SE 10 | SE 8 | ESE 8 | SE 10 | ESE 7 | ESE 7 | S 8 | S 9 | S 9 | S 10 | S 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SE 10 | SW 9 |
28 | 69 | 56 | 26 | 29 | 18 | 21 | 99 | 101 | 190 | 173 | 141 | 149 | 116 | 90 | 88 | 86 | 70 | 49 | 90 | |
Swell 2 Height (m) Direction Period (s) | SSW 8 | SE 10 | SE 10 | SSW 8 | SE 10 | SE 10 | SE 10 | SE 11 | S 11 | ESE 11 | SE 11 | ESE 10 | SE 10 | ESE 10 | ESE 11 | SE 11 | ESE 11 | SE 10 | E 12 | SE 9 |
11 | 27 | 26 | 11 | 25 | 25 | 25 | 29 | 62 | 44 | 29 | 43 | 17 | 10 | 40 | 30 | 40 | 35 | 12 | 21 | |
Swell 3 Height (m) Direction Period (s) | ESE 8 | SSW 8 | SSW 8 | SW 9 | SSW 8 | S 8 | ESE 7 | ESE 7 | ESE 11 | E 6 | E 6 | ESE 6 | E 10 | ESE 13 | SSE 10 | SSE 9 | SSE 10 | ESE 12 | SE 5 | ESE 10 |
13 | 11 | 11 | 3 | 6 | 12 | 9 | 5 | 45 | 3 | 3 | 4 | 8 | 17 | 9 | 9 | 9 | 29 | 1 | 20 | |
Wind waves Height (m) Direction Period (s) | SE 5 | — | — | ESE 8 | — | — | — | — | — | — | SW 3 | — | — | SW 3 | — | SSW 3 | SW 3 | — | SSW 9 | SW 3 |
36 | — | — | 51 | — | — | — | — | — | — | 2 | — | — | 1 | — | 1 | 1 | — | 94 | 5 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 32 | 32 | 3 | 3 | 18 | 18 | 51 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 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.











