Surf Forecasts:
Tainohama surf forecast from 18 Aug 2026:
- Best quality surf: Wednesday 26 Aug, 3AM (local time) - 5.5ft (1.7m), 14s period, SSE swell with cross-offshore winds.
- Most powerful swell: Wednesday 26 Aug, 3AM (local time) - 5.5ft (1.7m), 14s period, SSE swell with 1,019 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 14s and forecast to arrive on Wednesday (Aug 26) at 3AM. 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 | 3AM (Wed 26th Aug) | 5.5ft (1.7m) 14s |
| Most Powerful | 3AM (Wed 26th Aug) | 5.5ft (1.7m) 14s |
Table - best surf conditions forecast for Tainohama over the next 16 days.
The Lowdown
Alright, Rusty here with the lowdown on the local lineup. One spot to talk about, so let’s keep it simple.
The first week is a bust. From Tuesday the 18th through Sunday the 24th of August, don't bother. It’s tiny, weak, and the wind is all wrong. The wave energy is barely breaking 90, and the water’s a warm 83°F, which is about average for the time of year. Just flat and choppy.
Then, Tuesday the 25th of August, Tainohama starts to show some life. A clean SE swell rolls in, 3ft in the morning with a long 16-second period and a clean cross-offshore breeze from the NNE. By the afternoon, it’s pushin' 5ft with the same clean lines. Energy climbs past 500 and then over 1000.
The real standout run begins Wednesday the 26th through Friday the 28th of August. Wednesday morning has 8ft from the SSE, 14 seconds, and clean cross-off winds. Thursday the 27th is even better: 8ft with a 15-second groundswell and clean conditions, energy over 3000. Thursday afternoon steps it up to 10ft, 16 seconds, still clean. This is big, powerful stuff—best for experienced surfers at this reef.
Friday the 28th of August is the absolute winner. Morning brings a massive 12ft from the S, 16-second period, with a gentle offshore breeze. Wave energy is a huge 5647. Conditions are exceptional for experts. The afternoon holds the same. After that, it starts to back off a bit through the weekend, with more onshore winds.
Early September still has some punch. Monday the 31st has 7ft from the SSW with a 15-second period but some cross-shore wind and stormy weather. Tuesday the 1st of September brings fresh offshore winds, 6ft in the morning and a punchy 10ft in the afternoon, though that afternoon swell is shorter period. Wednesday the 2nd cleans up nicely with 7-7ft ESE groundswell and fresh offshore breezes.
So, first week is a dud, but from Tuesday the 25th of August onwards, Tainohama is on. The best day by far is Friday the 28th—big, clean, and powerful. Get after it if you’re up for it.
Rusty.
Short Range ForecastSome drizzle, heaviest during Tue night. 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 Sat morning, min 25°C on Fri night). Wind will be generally light. | ||||||||||||||||||
Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | ||||||||||||||
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 8 | ESE 8 | ESE 8 | SE 10 | SE 10 | SE 10 | S 9 | S 9 | S 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 10 | SSW 10 | SSW 9 | SSW 9 | SSW 10 | SSW 10 |
Wave Graph  | |||||||||||||||||||
 kJ | 69 | 56 | 51 | 29 | 25 | 34 | 102 | 127 | 133 | 138 | 138 | 110 | 119 | 148 | 105 | 90 | 71 | 86 | 60 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | cross-on | cross-on | on | cross-on | glassy | cross-on | cross-on | glassy | cross-on | cross | on | on | cross-on | on | cross-on | cross-on |
High Tide | 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 | 26 | 28 | 28 | 26 | 29 | 28 | 26 | 29 | 29 | 26 | 29 | 29 | 26 | 29 | 29 | 26 | 29 | 29 | 25 |
Feels °C | 29 | 31 | 31 | 30 | 32 | 30 | 30 | 32 | 31 | 30 | 31 | 31 | 29 | 31 | 31 | 30 | 32 | 31 | 29 |
Swell 1 Height (m) Direction Period (s) | SE 8 | ESE 8 | ESE 8 | ESE 7 | ESE 7 | S 8 | S 9 | S 9 | S 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 10 | SSW 10 | SSW 9 | SSW 9 | SSW 10 | SSW 10 |
| kJ | 69 | 56 | 51 | 29 | 18 | 34 | 102 | 127 | 133 | 138 | 138 | 110 | 119 | 148 | 105 | 90 | 71 | 86 | 60 |
Swell 2 Height (m) Direction Period (s) | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | ESE 11 | ESE 11 | SE 11 | ESE 10 | SE 10 | ESE 10 | ESE 11 | ESE 11 | ESE 11 | SE 10 | SE 10 | ESE 10 |
| kJ | 27 | 26 | 26 | 25 | 25 | 25 | 28 | 44 | 44 | 29 | 43 | 17 | 10 | 40 | 46 | 40 | 35 | 33 | 42 |
Swell 3 Height (m) Direction Period (s) | SSW 8 | SSW 8 | SSW 8 | SSW 8 | S 8 | SE 7 | ESE 7 | ESE 7 | ESE 6 | E 6 | E 6 | E 10 | ESE 13 | SSE 10 | SSE 10 | SSE 10 | ESE 12 | ESE 12 | SSE 9 |
| kJ | 11 | 11 | 11 | 6 | 12 | 11 | 9 | 4 | 4 | 3 | 3 | 8 | 16 | 9 | 9 | 9 | 29 | 28 | 8 |
Wind waves Height (m) Direction Period (s) | SE 4 | — | — | — | — | — | — | — | — | SW 2 | — | — | SW 2 | — | SSW 2 | SW 3 | — | SSW 2 | SW 2 |
| kJ | 15 | — | — | — | — | — | — | — | — | 1 | — | — | 1 | — | 1 | 2 | — | 1 | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 21 | 3 | 32 | 18 | 18 | 32 | 3 | 0 | 3 | 3 | 0 | 3 | 3 | 3 | 51 | 3 | 3 | 32 | 3 |
Best forecast wave conditions in Shikoku | |||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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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