Surf Forecasts:
Tainohama surf forecast from 21 Aug 2026:
- Best quality surf: Tuesday 25 Aug, 6AM (local time) - 11ft (3.5m), 16s period, SSE swell with glassy winds.
- Most powerful swell: Tuesday 25 Aug, 9AM (local time) - 13ft (4.0m), 16s period, SSE swell with 6,824 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 9AM. 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 (Sat 22nd Aug) | 2.5ft (0.8m) 9s |
| Best Surf | 6AM (Tue 25th Aug) | 11ft (3.5m) 16s |
| Most Powerful | 9AM (Tue 25th Aug) | 13ft (4.0m) 16s |
Table - best surf conditions forecast for Tainohama over the next 16 days.
The Lowdown
Alright, this is Rusty checkin' in from the Tainohama region. The water temp is sittin' right around 83°F—pretty much spot on for this time of year, so no surprises there.
The outlook starts off a bit flat. Friday the 21st and Saturday the 22nd are just small and messy, with poor surf and choppy conditions. Sunday the 23rd is even smaller, barely a ripple. You’re not missin’ anything those first few days.
Monday the 24th of August sees a jump in swell, with a 5ft SE swell (19 sec period) in the morning. The energy is moderate (175), but the conditions are marginal. The afternoon gets bigger at 8ft from the SE, but the period drops to 16 sec and the onshore wind keeps it from being clean. Still, this is the first sign of life.
Now, Tuesday the 25th of August—that’s the standout. The morning is glassy with a solid 13ft SSE swell, period of 16 sec, and an incredible combined energy of 8733. This is big, powerful, expert-only surf. The swell direction (SSE) lines up nicely with the optimum S direction for the break. The afternoon gets a bit bigger at 15ft, but the wind swings onshore, making it less user-friendly. If you’re a seasoned charger, the Tuesday morning glass-off is your window.
Wednesday the 26th and Thursday the 27th are a write-off with strong cross-onshore winds and stormy conditions, despite the big swell. You don’t wanna be out there.
Friday the 28th of August morning brings a drop in size to 8ft SSE, but the wind is glassy again. The energy is moderate (820) and the conditions are good, though the risk of thunderstorms hangs around. The afternoon turns cross-onshore and less appealing.
The weekend of the 29th and 30th of August is small again, with waist-high, short-period swell. The Saturday morning is glassy with a 4ft SE swell, but it’s weak (269 energy). Just a dribbler for a longboard or a fish.
The start of the new week (31st August to 2nd September) is poor, with small, messy surf and increasing onshore winds. Not worth paddlin’ out.
Then, on Thursday the 3rd of September, the second standout appears. The morning is glassy with a 8ft ESE swell, but the period is a massive 20 sec—very long period groundswell. The energy is through the roof at 5979. This is an expert-only day, and the long period will make the waves pour over fast at Tainohama, which is a reef. The afternoon sees a bigger 12ft E swell (19 sec period, 9420 energy), but the wind turns onshore again.
Friday the 4th of September drops down to 5ft E swell (13 sec period, 821 energy) with onshore wind—marginal at best. The rest of the run into the 5th of September is small and messy.
So, to sum it up: the best of the best is the Tuesday the 25th of August morning for the big, glassy, expert-level SSE groundswell. The second standout is the Thursday the 3rd of September morning, also glassy, with a massive 20-second period ESE swell for the experts. Both are for the skilled crew only.
Rusty out.
Short Range ForecastMostly dry. Warm (max 30°C on Sun morning, min 25°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 87mm), heaviest during Wed night. Warm (max 29°C on Mon morning, min 25°C on Mon night). Winds increasing (calm on Mon night, strong winds from the SE by Wed night). | ||||||||||||||||||||
Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | |||||||||||||||
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) | S 9 | S 10 | SSW 9 | SSW 9 | SSW 9 | SSW 8 | SSW 8 | SE 13 | SE 12 | SE 19 | SE 16 | SSE 16 | SSE 16 | SSE 15 | SSE 14 | S 12 | S 11 | S 10 | S 10 | SSE 10 | S 9 |
Wave Graph | |||||||||||||||||||||
127 | 145 | 108 | 108 | 80 | 55 | 55 | 49 | 152 | 1370 | 3676 | 5386 | 6824 | 6322 | 5733 | 2569 | 1694 | 1224 | 1359 | 1314 | 1219 | |
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 | cross-on | cross-on | on | on | cross-on | glassy | on | cross-on | cross-on | on | on | on | cross-on | cross-on |
High Tide | 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 | 4:23AM1.82m | 5:43PM1.86m | 5:06AM1.93m | 6:07PM1.91m | ||||||||
Low Tide | 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 | 11:05AM0.31m | 11:22PM0.88m | 11:40AM0.28m | 11:52PM0.74m | ||||||||
5:26 | — | — | 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 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 8 | 6 | 8 | 65 | 54 | 41 | 14 |
Temp °C | 29 | 29 | 26 | 29 | 29 | 26 | 30 | 29 | 26 | 29 | 29 | 26 | 29 | 29 | 27 | 27 | 27 | 26 | 26 | 26 | 27 |
Feels °C | 32 | 32 | 30 | 31 | 31 | 30 | 33 | 32 | 30 | 32 | 32 | 30 | 32 | 31 | 31 | 29 | 30 | 27 | 27 | 29 | 31 |
Swell 1 Height (m) Direction Period (s) | S 9 | S 10 | SSW 9 | SSW 9 | SSW 9 | SSW 8 | SSW 8 | S 8 | SE 12 | SE 19 | SE 16 | SSE 16 | SSE 16 | SSE 15 | SSE 14 | S 12 | S 11 | SSE 10 | S 10 | E 11 | S 9 |
127 | 145 | 108 | 108 | 80 | 55 | 55 | 49 | 152 | 1370 | 3676 | 5386 | 6824 | 6322 | 5733 | 2569 | 1694 | 979 | 1359 | 10 | 1010 | |
Swell 2 Height (m) Direction Period (s) | ESE 11 | ESE 11 | SE 11 | ESE 10 | SE 10 | ESE 10 | ESE 11 | SE 13 | S 8 | SE 13 | S 10 | SSW 9 | E 15 | E 14 | E 13 | E 13 | E 13 | E 12 | E 12 | E 15 | E 11 |
44 | 44 | 29 | 43 | 17 | 10 | 39 | 45 | 33 | 330 | 48 | 16 | 17 | 16 | 32 | 30 | 29 | 25 | 11 | 4 | 9 | |
Swell 3 Height (m) Direction Period (s) | ESE 7 | ESE 6 | ESE 6 | ESE 7 | E 10 | ESE 13 | SSE 10 | ESE 11 | SSW 9 | S 8 | E 12 | E 12 | E 15 | E 14 | SSW 10 | E 19 | E 19 | SE 16 | E 16 | SE 16 | E 15 |
4 | 4 | 3 | 4 | 8 | 16 | 9 | 23 | 32 | 35 | 12 | 44 | 17 | 16 | 9 | 7 | 7 | 10 | 5 | 10 | 4 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | S 9 | — | — | — | SE 9 | — | S 10 | — | SSE 10 | S 9 |
— | — | — | — | — | — | — | — | — | — | — | 60 | — | — | — | 350 | — | 1224 | — | 1314 | 1219 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 3 | 32 | 3 | 3 | 51 | 3 | 3 | 32 | 3 | 3 | 3 | 3 | 0 | 3 | 77 | 348 | 348 | 348 | 349 | 32 | 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.











