Surf Forecasts:
Tainohama surf forecast from 12 Aug 2026:
- Best quality surf: Wednesday 19 Aug, 12PM (local time) - 5ft (1.5m), 8s period, SE swell with glassy winds.
- Most powerful swell: Wednesday 19 Aug, 6PM (local time) - 5ft (1.6m), 9s period, SE swell with 414 kJ wave energy.
- Next surfable swell (1★+): Friday 14 Aug, 3AM (local time) - 2.5ft (0.7m), 9s 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 14) at 3AM. The primary swell is predicted to be 0.7m and 9s period with a secondary swell of 0.3m and 4s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Tainohama in the next 16 days are 1.6m 9s and forecast to arrive on Wednesday (Aug 19) at 6PM. Winds are predicted to be onshore at the time the swell arrives.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Fri 14th Aug) | 2.5ft (0.7m) 9s |
| Best Surf | 12PM (Wed 19th Aug) | 5ft (1.5m) 8s |
| Most Powerful | 6PM (Wed 19th Aug) | 5ft (1.6m) 9s |
Table - best surf conditions forecast for Tainohama over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s look at what’s coming down the line for Tainohama over the next couple of weeks.
Honestly, the outlook kicks off with a flat, frustrating stretch. For the first several days, from Thursday the 13th right through to the middle of the following week, we’re looking at real dud conditions. A lot of risk of thunderstorms, onshore or cross-onshore winds, and weak, messy swell. It’s going to be a struggle to find anything worth paddling out for. This is a long, blank run that we just have to sit through.
There’s a flicker of improvement on Saturday the 15th morning. It’s glassy, with light easterly wind, but the swell is tiny at 2ft from the south and the wave energy is weak (140). It’s surfable, but very ordinary.
The first real turning point comes on Wednesday the 19th. The morning looks good—glassy conditions with a light northeasterly, and the swell bumps up to 4ft from the ESE. The wave energy is moderate (265) and the wave comment says to expect good surf conditions. That’s our first true window of opportunity.
Friday the 21st morning is another standout. Glassy again, with a northeasterly breeze, and a solid 4ft south swell pushing in with moderate energy (317). Waves should be clean and have some shape.
The big one, the real standout of the entire forecast, lands on Tuesday the 25th. The morning is glassy, with zero wind from the north-northeast. We’re looking at a 7ft swell from the ESE with a very long period of 14 seconds. The combined energy is massive at 1978, and the report says it’s excellent surf conditions for experienced surfers. That’s a proper groundswell. That long period will make it pitchy and powerful, especially on a reef setup like Tainohama. This is only for the advanced crew—7ft at this period is serious.
After that, the forecast gets wild but messy. Thursday the 27th morning sees a solid 8ft swell from the ESE with a 15-second period, and energy through the roof at 2644. But the onshore southerly wind (15 km/h) is going to chop it up, so it’s marginal at best. By Friday the 28th, we’re looking at massive 16ft to 18ft ESE swells with that same long period, but the wind is honking cross-onshore at 25 to 30 km/h. For paddle surfing, it’s going to be a washing machine and not recommended. That setup with that much swell and wind might actually be more interesting for kite surfing.
So to sum it up: suffer through the first week, mark your calendar for the 19th and 21st mornings for some clean, smaller fun, but the absolute highlight is the morning of Tuesday the 25th for experienced surfers chasing a powerful, glassy groundswell.
Stay stoked, and check the forecasts again closer to the 25th—long-range standouts like that are promising but can shift.
Rusty.
Short Range ForecastHeavy rain (total 31mm), heaviest during Sat night. Warm (max 29°C on Sat afternoon, min 24°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 24mm), heaviest during Mon morning. Warm (max 29°C on Tue afternoon, min 25°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | |||||||||||||||
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) | SSW 9 | SSW 9 | S 9 | S 9 | S 9 | S 8 | S 10 | S 9 | S 9 | ESE 6 | ESE 6 | ESE 10 | ESE 10 | ESE 10 | SE 5 | SE 11 | SE 5 | ESE 7 | ESE 6 | SE 10 | SE 9 |
Wave Graph | |||||||||||||||||||||
88 | 86 | 79 | 73 | 73 | 52 | 92 | 79 | 78 | 104 | 87 | 196 | 145 | 179 | 33 | 29 | 41 | 186 | 101 | 408 | 349 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross-on | on | cross-on | cross | glassy | on | cross-on | cross-on | on | cross-on | on | on | on | on | cross-on | cross | glassy | on | glassy |
High Tide | 6:38PM1.92m | 6:09AM2.00m | 7:03PM1.93m | 6:47AM2.00m | 7:28PM1.93m | 7:26AM1.97m | 7:52PM1.91m | 8:05AM1.88m | 8:18PM1.88m | 8:47AM1.76m | 8:45PM1.83m | 9:37AM1.62m | 9:13PM1.77m | ||||||||
Low Tide | 12:07PM0.22m | 00:20AM0.79m | 12:40PM0.26m | 00:51AM0.69m | 1:11PM0.34m | 1:24AM0.61m | 1:41PM0.46m | 1:58AM0.57m | 2:11PM0.61m | 2:35AM0.56m | 2:40PM0.78m | 3:17AM0.58m | 3:10PM0.96m | ||||||||
5:20 | — | — | 5:22 | — | — | 5:22 | — | — | 5:22 | — | — | 5:24 | — | — | 5:24 | — | — | 5:24 | — | — | |
— | 6:51 | — | — | 6:50 | — | — | 6:49 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — | 6:44 | — | |
mm | 6 | 3 | 4 | 2 | — | 1 | — | 1 | 14 | 3 | 1 | 4 | 5 | 6 | 4 | 1 | — | — | — | — | — |
Temp °C | 27 | 27 | 25 | 28 | 28 | 25 | 28 | 29 | 25 | 27 | 27 | 26 | 27 | 27 | 26 | 28 | 29 | 27 | 29 | 29 | 27 |
Feels °C | 29 | 29 | 28 | 30 | 29 | 28 | 32 | 31 | 28 | 28 | 28 | 28 | 29 | 29 | 28 | 30 | 31 | 31 | 33 | 33 | 33 |
Swell 1 Height (m) Direction Period (s) | SSW 9 | SSW 9 | S 9 | S 9 | S 9 | S 8 | S 10 | S 9 | S 9 | S 9 | S 9 | S 8 | S 8 | S 8 | SSW 8 | SSE 5 | SE 10 | ESE 7 | ESE 6 | SE 10 | SE 9 |
88 | 86 | 79 | 73 | 73 | 52 | 92 | 79 | 78 | 54 | 57 | 36 | 34 | 35 | 22 | 16 | 28 | 186 | 58 | 408 | 349 | |
Swell 2 Height (m) Direction Period (s) | SE 12 | E 9 | ESE 4 | E 9 | E 9 | S 11 | E 10 | E 10 | ESE 10 | E 10 | E 10 | SE 11 | SE 11 | SE 11 | E 9 | SSW 8 | SSW 8 | SE 10 | SE 8 | SW 10 | S 9 |
23 | 7 | 6 | 15 | 15 | 37 | 30 | 30 | 31 | 51 | 71 | 42 | 42 | 42 | 28 | 20 | 13 | 26 | 100 | 4 | 2 | |
Swell 3 Height (m) Direction Period (s) | E 9 | SE 12 | E 10 | SE 11 | ESE 3 | E 9 | SE 11 | SE 8 | SE 12 | SE 12 | SE 11 | — | — | SE 11 | SE 11 | SE 11 | E 9 | SSW 8 | SSW 8 | S 8 | SSW 9 |
7 | 22 | 16 | 20 | 2 | 28 | 18 | 10 | 22 | 49 | 45 | — | — | 42 | 30 | 29 | 6 | 13 | 6 | 1 | 8 | |
Wind waves Height (m) Direction Period (s) | ESE 10 | ESE 4 | — | ESE 3 | SE 3 | — | — | — | ESE 5 | ESE 6 | ESE 6 | ESE 10 | ESE 10 | ESE 10 | SE 5 | E 4 | SE 5 | — | ESE 6 | — | — |
18 | 8 | — | 2 | 3 | — | — | — | 75 | 104 | 87 | 196 | 145 | 179 | 33 | 9 | 41 | — | 101 | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 64 | 3 | 3 | 3 | 3 | 3 | 0 | 3 | 64 | 64 | 64 | 64 | 64 | 3 | 32 | 3 | 64 | 2 | 0 | 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.











