Surf Forecasts:
Tainohama surf forecast from 21 Aug 2026:
- Best quality surf: Tuesday 25 Aug, 3AM (local time) - 11ft (3.5m), 16s period, SSE swell with glassy winds.
- Most powerful swell: Tuesday 25 Aug, 12PM (local time) - 13ft (4.0m), 16s period, SSE swell with 7,028 kJ wave energy.
- Next surfable swell (1★+): Saturday 22 Aug, 6AM (local time) - 2.5ft (0.8m), 9s period with SSW 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 Saturday (Aug 22) at 6AM. The primary swell is predicted to be 0.8m and 9s period with a secondary swell of 0.4m 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 4.0m 16s and forecast to arrive on Tuesday (Aug 25) at 12PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Friday (Aug 28) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Sat 22nd Aug) | 2.5ft (0.8m) 9s |
| Best Surf | 3AM (Tue 25th Aug) | 11ft (3.5m) 16s |
| Most Powerful | 12PM (Tue 25th Aug) | 13ft (4.0m) 16s |
Table - best surf conditions forecast for Tainohama over the next 16 days.
The Lowdown
Gather 'round, surfers. Rusty here, and I've got a look at what's coming our way for the next couple of weeks. It's a bit of a slow starter, but we've got some serious potential brewing for the more experienced crew.
The first few days at Tainohama are a washout. From Saturday the 22nd right through the weekend, we're looking at poor surf conditions with small, weak swell and cross-onshore winds. Not worth paddling out for. The water temp is about average for this time of year, so nothing to worry about on that front.
Things start to stir on Monday the 24th. The swell picks up to 4ft from the SE, but it's a long-period groundswell at 19 seconds. That's a double-edged sword at a reef break like Tainohama – it brings good energy (1112), but those long gaps between sets might make it feel a bit inconsistent. Still, it's a step in the right direction. The wind is light onshore, so it's marginal.
Tuesday the 25th is where it gets interesting. We're looking at a solid 13ft swell from the SSE, with a long period of 16 seconds. The combined energy is cranking at 6946. This is big, powerful, and definitely for advanced surfers only. The wind is onshore, but it's light, so the conditions could be manageable. The morning session looks the best of the two.
Wednesday the 26th and Thursday the 27th are a write-off. The wind turns nasty with risk of thunderstorms and moderate rain, and the swell gets messy. The energy is still there, but it's a washing machine. Skip it.
Now, let's talk about the real standout. Friday the 28th morning brings a shift. The swell drops to 5ft from the S, but the wind goes glassy. That's a magic word. The energy is moderate (307), and the forecast says "expect good surf conditions." This is a window for clean, fun waves, and it's a great option for a range of surfers.
Saturday the 29th morning is also a good call. We've got 6ft from the ESE, but the period is a short 7 seconds. Still, the wind is glassy again, and the forecast says "expect good surf conditions." The energy is 450. This is another clean session, though the short period might make it a bit bouncy.
Now, hold onto your boards, because the real gold is in the first week of September. Monday the 1st of September morning is a full-on standout. We're looking at an 12ft swell from the ESE, with a period of 11 seconds. The energy is massive at 4845, and the wind is glassy. The forecast says "excellent surf conditions for experienced surfers." This is a big, clean, powerful swell. This is the one for the guys who know what they're doing.
Tuesday the 2nd of September is also a cracker. The swell builds to 16ft from the ESE, with a period of 11 seconds. The energy is off the charts at 7125. The wind is a moderate cross-offshore from the NNE, which should keep it clean. This is huge, expert-only territory. The afternoon session is the pick of the day.
Wednesday the 3rd of September morning is another big one. We've got 13ft from the SSE, but a shorter period of 9 seconds. The wind is a moderate offshore from the N, which is perfect. The energy is 3214, and the forecast says "excellent surf conditions for experienced surfers." This is a classic, clean, big-wave day.
The surf then drops off into the second week, but it's not all bad. Friday the 4th of September morning has a clean 5ft from the SSW with a light offshore wind. The energy is 686. A nice, manageable option for those who want a break from the big stuff.
Overall, the first week is a slow burn that builds to a very solid, big-wave window for the experts. The glassy mornings on the 28th and 29th of August are the best for the less experienced, and the 1st, 2nd, and 3rd of September are pure, heavy gold for the advanced crew. Don't sleep on the long-range forecast, but remember, it's less certain.
Rusty.
Short Range ForecastMostly dry. Warm (max 30°C on Sun morning, min 25°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 64mm), heaviest during Thu morning. Warm (max 29°C on Tue morning, min 23°C on Thu morning). Winds increasing (calm on Mon night, fresh winds from the SSW by Wed night). | ||||||||||||||||||
Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | ||||||||||||||
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) | SSW 9 | SSW 9 | SSW 9 | SSW 8 | SSW 8 | SE 13 | SE 12 | SE 19 | SE 16 | SSE 16 | SSE 16 | SSE 15 | S 14 | S 13 | S 12 | SSW 11 | S 9 | SSE 8 | S 8 |
Wave Graph | |||||||||||||||||||
108 | 108 | 80 | 55 | 54 | 45 | 152 | 817 | 2709 | 5174 | 6912 | 6876 | 5393 | 2982 | 2221 | 685 | 529 | 367 | 367 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | cross-on | on | on | on | cross-on | on | cross-on | on | on | glassy |
High Tide | 10:41PM1.61m | 3:26PM1.47m | 00:26AM1.55m | 4:19PM1.60m | 2:18AM1.59m | 4:51PM1.71m | 3:30AM1.70m | 5:17PM1.80m | 4:23AM1.82m | 5:43PM1.86m | 5:06AM1.93m | 6:07PM1.91m | |||||||
Low Tide | 7:01AM0.68m | 7:27PM1.39m | 8:35AM0.60m | 9:25PM1.30m | 9:39AM0.48m | 10:14PM1.17m | 10:26AM0.38m | 10:50PM1.03m | 11:05AM0.31m | 11:22PM0.88m | 11:40AM0.28m | 11:52PM0.74m | |||||||
— | 5:26 | — | — | 5:28 | — | — | 5:28 | — | — | 5:28 | — | — | 5:30 | — | — | 5:31 | — | — | |
6:42 | — | 6:40 | — | — | 6:39 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | 1 | 13 | 12 | 10 | 12 | 12 | 4 | 16 |
Temp °C | 26 | 29 | 29 | 26 | 30 | 29 | 27 | 29 | 29 | 26 | 29 | 29 | 27 | 27 | 26 | 26 | 24 | 25 | 24 |
Feels °C | 30 | 31 | 32 | 30 | 32 | 31 | 31 | 32 | 32 | 31 | 32 | 32 | 31 | 29 | 27 | 27 | 27 | 28 | 29 |
Swell 1 Height (m) Direction Period (s) | SSW 9 | SSW 9 | SSW 9 | SSW 8 | SSW 8 | S 8 | SE 12 | SE 19 | SE 16 | SSE 16 | SSE 16 | SSE 15 | S 14 | S 13 | S 12 | SSW 11 | S 9 | SSE 8 | S 8 |
108 | 108 | 80 | 55 | 54 | 33 | 152 | 817 | 2709 | 5174 | 6912 | 6876 | 5393 | 2982 | 2221 | 685 | 529 | 367 | 367 | |
Swell 2 Height (m) Direction Period (s) | SE 11 | ESE 10 | SE 10 | ESE 10 | ESE 11 | SE 13 | SW 9 | SE 12 | SSW 8 | E 11 | E 15 | E 14 | E 13 | SE 9 | E 13 | SE 9 | E 12 | E 11 | E 11 |
29 | 43 | 17 | 10 | 38 | 45 | 39 | 260 | 24 | 10 | 17 | 16 | 32 | 307 | 29 | 307 | 11 | 10 | 9 | |
Swell 3 Height (m) Direction Period (s) | ESE 6 | ESE 7 | E 10 | ESE 13 | ESE 6 | ESE 11 | S 8 | SSW 10 | SSE 8 | SSW 10 | E 15 | — | — | E 13 | E 18 | E 12 | SE 16 | SE 13 | ESE 9 |
3 | 4 | 8 | 16 | 3 | 23 | 21 | 35 | 13 | 37 | 17 | — | — | 30 | 6 | 25 | 10 | 7 | 8 | |
Wind waves Height (m) Direction Period (s) | SW 2 | — | — | — | — | — | — | — | — | — | — | — | — | SE 9 | SE 9 | — | — | — | — |
1 | — | — | — | — | — | — | — | — | — | — | — | — | 122 | 393 | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 2 | 3 | 3 | 3 | 3 | 77 | 348 | 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.











