Surf Forecasts:
Tainohama surf forecast from 16 Aug 2026:
- Best quality surf: Friday 21 Aug, 6AM (local time) - 3.5ft (1.0m), 11s period, S swell with glassy winds.
- Most powerful swell: Monday 24 Aug, 9AM (local time) - 5.5ft (1.7m), 17s period, SE swell with 1,690 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 6AM (local time) - 3.5ft (1.0m), 11s period with S 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 21) at 6AM. The primary swell is predicted to be 1.0m and 11s period with a secondary swell of 0.5m and 11s. 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 17s and forecast to arrive on Monday (Aug 24) at 9AM. 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+) | 6AM (Fri 21st Aug) | 3.5ft (1.0m) 11s |
| Best Surf | 6AM (Fri 21st Aug) | 3.5ft (1.0m) 11s |
| Most Powerful | 9AM (Mon 24th Aug) | 5.5ft (1.7m) 17s |
Table - best surf conditions forecast for Tainohama over the next 16 days.
The Lowdown
Right then, let’s have a look at what’s coming down the pipe for Tainohama. This is a reef setup, so it needs a decent swell and the right direction to light up. To be honest, the first week is a bit of a drag. From Monday the 17th right through to the 22nd, we’re looking at mostly poor conditions – tiny swell, onshore winds, and not much to get excited about. The combined wave energy is weak to moderate at best (around 150 to 247), and the swell direction is all over the shop, never really locking into the optimum S direction this spot loves. You’d be wasting your time paddling out.
Then, things start to shift. Sunday the 23rd shows a little flicker of life with glassy conditions in the morning and a 3ft SSW swell, but it’s still pretty ordinary. The real story begins Monday the 24th. A proper, long-period groundswell from the SE arrives, with a period of 16 seconds, and by the afternoon we’re looking at 5ft of it under glassy skies. Energy jumps right up (1314). This is excellent surf for the experienced crew – clean, powerful, and with that long period energy that really suits a reef like this. The water temperature is about average for the time of year, so no surprises there.
Tuesday the 25th morning holds similar promise with 7ft SE groundswell (2416 energy) and glassy winds, but the afternoon gets a bit questionable. The standout, the one you absolutely circle in red, is Thursday the 27th. That morning, we’ve got a massive 13ft SSE groundswell with a 16-second period, glassy conditions, and an energy reading of 7969 – that’s exceptional stuff. This is expert territory, pure and simple. The reef will be handling some serious, powerful lines. The crowds at Tainohama can be a problem sometimes, but on a day like this, with that much size, it’ll sort out the wheat from the chaff.
The end of the month and into September carries some serious size, but the wind is the enemy. Friday the 28th is a write-off with gale-force cross-shore winds making it dangerous. Saturday the 29th afternoon could be a ripper with 13ft SSE swell and clean cross-off winds (6073 energy), but you need to pick your moment. The first of September looks big again, but the onshore winds will make it a battle.
Best on offer: Thursday morning the 27th of August without a doubt – that’s the one. And keep an eye on the Monday the 24th for a slightly more manageable, but still excellent, start to the run.
Rusty.
Short Range ForecastLight rain (total 8mm), mostly falling on Mon night. Warm (max 28°C on Mon afternoon, min 25°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 6mm), mostly falling on Thu morning. Warm (max 28°C on Thu afternoon, min 25°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | |||||||||||||||
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) | SE 5 | SE 11 | SE 9 | SE 11 | SE 10 | SE 10 | ESE 8 | SE 10 | SE 10 | E 7 | S 9 | ESE 11 | S 10 | S 10 | S 10 | S 10 | S 9 | SSW 9 | SSW 9 | SSW 9 | SE 14 |
Wave Graph  | |||||||||||||||||||||
 kJ | 47 | 30 | 79 | 29 | 28 | 27 | 71 | 27 | 25 | 45 | 52 | 86 | 264 | 284 | 290 | 235 | 180 | 153 | 110 | 94 | 322 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | on | on | on | on | on | on | cross-on | on | on | cross-on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 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 | 4:19PM1.60m | 2:18AM1.59m | ||||||||
Low Tide | 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 | 8:35AM0.60m | 9:25PM1.30m | ||||||||
 |  |  | |  |  |  | | | | | | | | | | |  | | | | |
 | 5:24 | — | — | 5:24 | — | — | 5:24 | — | — | 5:26 | — | — | 5:26 | — | — | 5:26 | — | — | 5:28 | — | — |
 | — | 6:46 | — | — | 6:45 | — | — | 6:44 | — | — | 6:43 | — | — | 6:42 | — | — | 6:40 | — | — | 6:39 | — |
mm | 2 | 1 | 4 | 1 | — | — | — | — | — | 3 | 1 | — | — | — | — | 2 | — | — | 1 | 1 | — |
Temp °C | 27 | 28 | 26 | 28 | 28 | 26 | 28 | 28 | 26 | 27 | 28 | 26 | 28 | 28 | 26 | 28 | 28 | 26 | 29 | 29 | 26 |
Feels °C | 30 | 30 | 29 | 30 | 30 | 30 | 30 | 30 | 30 | 31 | 31 | 30 | 31 | 30 | 30 | 30 | 29 | 30 | 30 | 30 | 29 |
Swell 1 Height (m) Direction Period (s) | SSW 8 | SE 5 | SE 9 | SE 11 | SE 5 | SE 5 | ESE 8 | ESE 8 | ESE 5 | ESE 7 | S 9 | S 8 | S 10 | S 10 | S 10 | S 10 | S 9 | SSW 9 | SSW 9 | SSW 9 | SE 14 |
| kJ | 22 | 30 | 79 | 29 | 23 | 23 | 71 | 19 | 24 | 25 | 52 | 86 | 264 | 284 | 290 | 235 | 180 | 153 | 110 | 94 | 322 |
Swell 2 Height (m) Direction Period (s) | SE 11 | SSW 8 | SSW 8 | SSW 8 | ESE 8 | ESE 8 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | ESE 4 | ESE 11 | ESE 11 | ESE 11 | ESE 10 | ESE 10 | ESE 10 | ESE 11 | ESE 11 | SSW 9 |
| kJ | 42 | 21 | 20 | 11 | 22 | 23 | 26 | 26 | 25 | 25 | 25 | 7 | 44 | 44 | 44 | 42 | 42 | 21 | 37 | 22 | 84 |
Swell 3 Height (m) Direction Period (s) | ESE 9 | SE 11 | SE 11 | — | SE 10 | SE 10 | SSW 8 | SSW 8 | E 7 | S 9 | — | SE 10 | ESE 6 | E 8 | E 14 | ESE 7 | ESE 7 | ESE 6 | SSE 10 | SE 13 | S 10 |
| kJ | 28 | 30 | 30 | — | 28 | 27 | 11 | 11 | 4 | 25 | — | 28 | 7 | 23 | 4 | 10 | 10 | 4 | 9 | 46 | 2 |
Wind waves Height (m) Direction Period (s) | SE 5 | — | SE 4 | SE 4 | — | — | — | SE 5 | — | E 7 | ESE 5 | ESE 11 | — | — | — | — | — | — | — | — | — |
| kJ | 47 | — | 21 | 21 | — | — | — | 27 | — | 45 | 13 | 75 | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 3 | 64 | 3 | 21 | 64 | 454 | 18 | 3 | 501 | 3 | 3 | 32 | 3 | 3 | 32 | 3 | 32 | 36 | 3 | 0 | 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.
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