Surf Forecasts:
Tainohama surf forecast from 16 Aug 2026:
- Best quality surf: Friday 21 Aug, 3AM (local time) - 4.5ft (1.4m), 11s period, S swell with glassy winds.
- Most powerful swell: Friday 21 Aug, 6AM (local time) - 5ft (1.5m), 11s period, S swell with 553 kJ wave energy.
- Next surfable swell (1★+): Wednesday 19 Aug, 6AM (local time) - 2ft (0.6m), 8s period with ESE 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 19) at 6AM. The primary swell is predicted to be 0.6m and 8s period with a secondary swell of 0.4m and 10s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Tainohama in the next 16 days are 1.5m 11s and forecast to arrive on Friday (Aug 21) at 6AM. Winds are predicted to be glassy at the time the swell arrives.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Wed 19th Aug) | 2ft (0.6m) 8s |
| Best Surf | 3AM (Fri 21st Aug) | 4.5ft (1.4m) 11s |
| Most Powerful | 6AM (Fri 21st Aug) | 5ft (1.5m) 11s |
Table - best surf conditions forecast for Tainohama over the next 16 days.
The Lowdown
Alright, let’s break it down for Tainohama.
The first week or so is flat and messy. From August 16th through to around the 20th, you’ve got tiny waves, onshore wind from the south or southeast, and a lot of stormy weather. Not worth the drive. Water temp is 28°, which is about average for this time of year.
First real look comes on Friday August 21st morning – a 5-foot swell from the south, 11-second period, moderate energy. Still onshore, so it’s marginal. Saturday the 22nd is similar, weak and choppy.
Then we get a clean moment: Monday August 24th afternoon. Glassy flat calm. Swell is 3 feet from the southeast, 13-second period, energy is moderate. This is the first real window – small, clean, good for a log.
Tuesday the 25th keeps building: 5 feet southeast swell, 14-second period, energy ramps up to strong. Wednesday the 26th gets to 7 to 7 feet, 15 to 16-second period, energy over 2000. Still a little cross-onshore, but the size is there.
Here’s the standout: Thursday August 27th morning. Tainohama gets an 8-foot swell from the south-southeast, 16-second period, with light offshore wind from the north-northeast. Conditions are clean. Energy hits 3619. This is for experienced surfers only – that’s a big groundswell on a reef. The swell direction lines up with the optimum south, so it’ll wrap in nicely.
After that, it’s a total loss. From Friday the 28th through Monday the 31st, winds are 30 to 55 mph onshore, swell hits 12 to 18 feet, and it’s blown out or dangerous. Energy goes through the roof – over 13000 – but it’s a kite-surfing windfest, not for paddle surfing.
Bottom line: first week is dead. The best call is Thursday 27th morning – big, clean, offshore. The rest is either marginal or pure chaos.
Rusty.
Short Range ForecastModerate rain (total 15mm), heaviest on Sun afternoon. Warm (max 28°C on Mon afternoon, min 24°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 3mm), mostly falling on Thu morning. Warm (max 29°C on Fri morning, min 25°C on Wed night). Wind will be generally light. | |||||||||||||||||||
Sun 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | ||||||||||||||
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) | ESE 6 | SE 6 | SE 5 | SE 11 | SE 11 | ESE 8 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | S 9 | S 9 | S 10 | S 11 | SSW 11 | SSW 10 | SSW 10 | SSW 10 | SSW 9 |
Wave Graph  | ||||||||||||||||||||
 kJ | 190 | 98 | 45 | 30 | 30 | 45 | 28 | 35 | 26 | 25 | 25 | 83 | 95 | 181 | 533 | 452 | 294 | 245 | 245 | 185 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | on | on | cross-on | cross-on | on | on | cross-on | on | on | cross-on | on | on | cross-on | on | cross-on | on |
High Tide | 7:52PM1.91m | 8:05AM1.88m | 8:18PM1.88m | 8:47AM1.76m | 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 | |||||||
Low Tide | 1:58AM0.57m | 2:11PM0.61m | 2:35AM0.56m | 2:40PM0.78m | 3:17AM0.58m | 3:10PM0.96m | 4:09AM0.63m | 3:44PM1.13m | 5:20AM0.68m | 4:37PM1.30m | 7:01AM0.68m | 7:27PM1.39m | ||||||||
 |  |  | |  | |  |  |  | |  | | | | | |  | |  |  | |
 | — | — | 5:24 | — | — | 5:24 | — | — | 5:24 | — | — | 5:26 | — | — | 5:26 | — | — | 5:26 | — | — |
 | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — | 6:44 | — | — | 6:43 | — | — | 6:42 | — | — | 6:40 | — |
mm | 7 | 2 | 1 | 1 | 2 | 2 | — | — | — | — | — | 1 | 1 | — | — | — | — | 1 | 3 | 50 |
Temp °C | 27 | 26 | 27 | 28 | 26 | 27 | 28 | 25 | 28 | 28 | 26 | 28 | 28 | 26 | 29 | 28 | 26 | 26 | 25 | 26 |
Feels °C | 29 | 28 | 29 | 30 | 30 | 30 | 30 | 28 | 30 | 30 | 31 | 32 | 31 | 31 | 32 | 31 | 31 | 30 | 28 | 27 |
Swell 1 Height (m) Direction Period (s) | S 9 | S 8 | S 8 | SSW 8 | SSW 8 | SSW 8 | ESE 8 | SE 4 | ESE 8 | ESE 8 | ESE 4 | S 9 | S 9 | S 10 | S 11 | SSW 11 | SSW 10 | SSW 10 | SSW 10 | SSW 9 |
| kJ | 39 | 35 | 33 | 21 | 20 | 19 | 13 | 10 | 21 | 20 | 13 | 83 | 95 | 181 | 533 | 452 | 294 | 245 | 245 | 185 |
Swell 2 Height (m) Direction Period (s) | ESE 10 | ESE 10 | SE 11 | SE 11 | SE 11 | SE 11 | SE 10 | E 8 | SE 10 | SE 10 | SE 10 | ESE 7 | SE 10 | S 12 | SE 11 | SE 11 | ESE 10 | ESE 10 | ESE 10 | ESE 10 |
| kJ | 35 | 31 | 42 | 30 | 30 | 29 | 28 | 35 | 26 | 25 | 25 | 20 | 25 | 132 | 29 | 29 | 42 | 38 | 41 | 21 |
Swell 3 Height (m) Direction Period (s) | SE 11 | SE 11 | ESE 9 | ESE 9 | ESE 9 | SE 11 | SSW 8 | SE 10 | SSW 8 | SSW 8 | ESE 8 | SE 10 | — | ESE 11 | E 9 | E 9 | E 14 | SE 11 | E 7 | ESE 13 |
| kJ | 45 | 43 | 28 | 28 | 15 | 30 | 11 | 28 | 11 | 11 | 11 | 25 | — | 64 | 6 | 6 | 4 | 4 | 9 | 17 |
Wind waves Height (m) Direction Period (s) | ESE 6 | SE 6 | SE 5 | SE 5 | SE 5 | ESE 8 | SE 5 | — | SE 4 | ESE 4 | — | — | ESE 6 | — | — | — | — | — | S 3 | — |
| kJ | 190 | 98 | 45 | 24 | 17 | 45 | 22 | — | 8 | 13 | — | — | 16 | — | — | — | — | — | 5 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 64 | 64 | 64 | 454 | 32 | 64 | 32 | 18 | 64 | 501 | 27 | 3 | 3 | 3 | 3 | 307 | 3 | 3 | 3 | 348 |
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.
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