Surf Forecasts:
Tainohama surf forecast from 19 Aug 2026:
- Best quality surf: Wednesday 26 Aug, 3AM (local time) - 10ft (3.0m), 16s period, SSE swell with glassy winds.
- Most powerful swell: Wednesday 26 Aug, 3PM (local time) - 15ft (4.5m), 17s period, SSE swell with 10,499 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 3AM (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 3AM. 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 4.5m 17s and forecast to arrive on Wednesday (Aug 26) at 3PM. 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+) | 3AM (Thu 20th Aug) | 1.5ft (0.4m) 10s |
| Best Surf | 3AM (Wed 26th Aug) | 10ft (3.0m) 16s |
| Most Powerful | 3PM (Wed 26th Aug) | 15ft (4.5m) 17s |
Table - best surf conditions forecast for Tainohama over the next 16 days.
The Lowdown
Alright, folks, Rusty here. Let me break down the local surf for you.
Right off the bat, we’ve got a stretch of nothing much. From now through most of next week, the surf is flat or just plain messy, and I wouldn’t bother paddling out. The first real whisper of a swell shows up on the morning of Friday, August 21st – a bit of ankle-high 0.9m SSW, but it’s glassy and clean. That’s about as good as it gets for a few days, and it’s still pretty ordinary.
The real standout window doesn’t kick in until the very end of the month. Saturday, August 30th, sees a sneaky clean-up. The morning at Tainohama (a reef break) will have a clean 1.8m S swell with a light cross-offshore breeze from the NE – that’s proper clean. The combined energy is moderate (798). Water temp is sitting at 28° and about average for this time of year.
But the absolute best on offer is Monday, August 31st, and the days that follow. The morning of the 31st delivers a solid 2.2m SE swell, period around 14 seconds, with a light cross-offshore breeze. The combined energy is strong (2041). That afternoon, it goes glassy, with a 2.3m SE swell and a period of 13 seconds – excellent conditions for experienced surfers. This is a long-period groundswell, so it’ll wrap nicely into the reef, but it’s going to be a bit too big and powerful for beginners. Crowds are possible here, so keep that in mind.
Tuesday, September 1st, and Wednesday, September 2nd, keep the run going with 3.0m to 3.5m SE/SSE swells, long periods, and clean cross-offshore winds. The energy is very strong (over 3900 each session). This is heavy, expert-level surf. If you’re up for it, this is the window.
The second week looks promising but less certain. By Thursday, September 3rd, the swell drops to a still-solid 2.3m SSW, but with a clean offshore breeze from the north. It’s still a good option for those who know what they’re doing.
Rusty.
Short Range ForecastMostly dry. Warm (max 29°C on Thu morning, min 25°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 29°C on Sat morning, min 25°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | |||||||||||||||
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) | ESE 8 | ESE 8 | SE 10 | SE 10 | SE 10 | S 9 | S 9 | S 10 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 11 | SE 13 | SE 15 | SE 16 | SE 16 | SE 15 | SSE 16 |
Wave Graph  | |||||||||||||||||||||
 kJ | 56 | 51 | 25 | 25 | 25 | 99 | 127 | 148 | 108 | 110 | 106 | 92 | 92 | 96 | 143 | 202 | 472 | 1571 | 2653 | 2721 | 4422 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-on | on | cross-on | cross-on | glassy | cross-on | cross-on | glassy | cross-on | cross | on | cross-on | cross | on | cross-on | cross | on | on | glassy |
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 | 3:30AM1.70m | 5:17PM1.80m | ||||||||
Low Tide | 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 | 10:26AM0.38m | 10:50PM1.03m | ||||||||
 | |  |  | | | | | | | | | | | | | | | | |  | |
 | 5:24 | — | — | 5:26 | — | — | 5:26 | — | — | 5:26 | — | — | 5:28 | — | — | 5:28 | — | — | 5:28 | — | — |
 | — | 6:44 | — | — | 6:43 | — | — | 6:42 | — | — | 6:40 | — | — | 6:39 | — | — | 6:37 | — | — | 6:37 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 28 | 28 | 26 | 29 | 28 | 26 | 29 | 29 | 26 | 29 | 29 | 26 | 29 | 29 | 26 | 29 | 29 | 26 | 29 | 29 | 26 |
Feels °C | 31 | 31 | 30 | 32 | 30 | 30 | 31 | 31 | 30 | 32 | 31 | 29 | 31 | 31 | 30 | 31 | 31 | 30 | 32 | 31 | 30 |
Swell 1 Height (m) Direction Period (s) | ESE 8 | ESE 8 | ESE 7 | SE 10 | S 8 | S 9 | S 9 | S 10 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 11 | SSW 10 | SE 15 | SE 16 | SE 16 | SE 15 | SSE 16 |
| kJ | 56 | 51 | 20 | 25 | 22 | 99 | 127 | 148 | 108 | 110 | 106 | 92 | 92 | 96 | 143 | 121 | 472 | 1571 | 2653 | 2721 | 4422 |
Swell 2 Height (m) Direction Period (s) | SE 10 | SE 10 | SE 10 | SE 7 | SE 10 | SE 10 | ESE 11 | ESE 11 | SE 11 | ESE 10 | SE 10 | ESE 10 | ESE 11 | ESE 11 | SE 12 | SE 13 | SSW 11 | SSW 10 | SSW 10 | SSW 10 | SW 10 |
| kJ | 26 | 26 | 25 | 11 | 25 | 28 | 44 | 44 | 29 | 41 | 17 | 10 | 39 | 23 | 118 | 202 | 128 | 88 | 78 | 82 | 24 |
Swell 3 Height (m) Direction Period (s) | SSW 8 | SSW 8 | SSW 8 | S 8 | SE 7 | ESE 7 | ESE 7 | ESE 6 | ESE 6 | ESE 6 | E 10 | ESE 13 | SSE 10 | SSE 10 | ESE 5 | SE 16 | SE 18 | E 12 | E 11 | E 12 | E 13 |
| kJ | 11 | 11 | 6 | 12 | 11 | 5 | 4 | 4 | 3 | 4 | 8 | 16 | 9 | 9 | 3 | 91 | 119 | 68 | 10 | 11 | 31 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | SW 2 | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 36 | 3 | 21 | 27 | 51 | 3 | 0 | 3 | 3 | 0 | 3 | 3 | 3 | 3 | 3 | 3 | 32 | 3 | 3 | 3 | 0 |
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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