Surf Forecasts:
Tengan surf forecast from 21 Aug 2026:
- Best quality surf: Wednesday 26 Aug, 9AM (local time) - 10ft (3.0m), 11s period, N swell with offshore winds.
- Most powerful swell: Tuesday 25 Aug, 12PM (local time) - 10ft (3.0m), 17s period, E swell with 5,536 kJ wave energy.
- Next surfable swell (1★+): Wednesday 26 Aug, 9AM (local time) - 10ft (3.0m), 11s period with N swell.
Best Forecast Surf Conditions for Tengan this week:
The surf forecast for Tengan over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Aug 26) at 9AM. The primary swell is predicted to be 3.0m and 11s period with a secondary swell of 0.5m and 11s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Tengan in the next 16 days are 3.0m 17s and forecast to arrive on Tuesday (Aug 25) at 12PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 4.0m 11s period and expected on Wednesday (Aug 26) at 3PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Wed 26th Aug) | 10ft (3.0m) 11s |
| Best Surf | 9AM (Wed 26th Aug) | 10ft (3.0m) 11s |
| Most Powerful | 12PM (Tue 25th Aug) | 10ft (3.0m) 17s |
Table - best surf conditions forecast for Tengan over the next 16 days.
The Lowdown
Alright, crew, let’s have a look at what’s coming our way for Tengan. This spot is a reef break, and it’s a bit of a fickle one – it’s inconsistent and rarely breaks, so when it’s on, it’s a treat. But I gotta be straight with you: the next several days are a write-off. We’ve got a long stretch of nothing much happening, with poor conditions and hardly any swell to speak of. From Saturday the 22nd right through to the end of the month, it’s mostly cross-onshore winds, lumpy, choppy, and tiny surf. Not even worth paddling out for. The combined wave energy is weak, well under 100 most of that time, and the swell heights barely hit 3 ft.
Then, things start to get interesting around Tuesday the 25th. We’ve got a decent pulse of swell arriving – 10 ft from the east, with a long period of 17 seconds. That’s proper groundswell. The energy jumps to a very strong 4733, which is a lot of power. But the wind is cross-shore, and it’s rated as marginal, not clean. The tide might be a factor too. So it’s more of a “keep an eye on it” day than a go-out-and-charge day.
The real standout window opens up on Wednesday the 26th. Wednesday morning, the wind swings light offshore from the west, at just 10 km/h. The swell is still solid at 8 ft, coming from the north with a 12-second period. The combined energy is strong at 2028. This is excellent surf for experienced surfers – it’s a bit too big for beginners. The reef should be handling that north swell well, and with clean, glassy conditions, it’s going to be a session to remember. The offshore wind holds through the afternoon, keeping the waves clean. Thursday the 27th is also very good, with 7 ft swell from the NNW and light offshore winds, but the energy drops a bit to 1001. Still, that’s a solid day.
After that, the wind turns against us again. Friday the 28th sees cross-onshore winds and a drop in quality, and from there it’s back to poor conditions through the first week of September. There’s a spike in swell on the 3rd of September – 8 ft to 10 ft from the north – but with fresh cross-onshore winds at 30 km/h, the surf will be lumpy and messy. Not recommended.
So, to sum it up: the first week is a bust, then we get a nice clean window mid-week from Wednesday the 26th through Thursday the 27th. That’s the best of the lot. After that, it’s back to the waiting game.
Rusty.
Short Range ForecastLight rain (total 5mm), mostly falling on Sat morning. Warm (max 28°C on Sat morning, min 27°C on Sat night). Mainly fresh winds. | Days 4-6 Weather SummaryModerate rain (total 15mm), heaviest on Thu afternoon. Warm (max 29°C on Tue morning, min 27°C on Tue night). Mainly fresh winds. | ||||||||||||||||||||
Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | |||||||||||||||
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) | ENE 9 | SE 10 | ESE 10 | E 14 | ESE 4 | ESE 12 | ESE 15 | ESE 16 | ESE 18 | E 17 | E 16 | NNW 8 | N 11 | ESE 10 | E 9 | ESE 9 | E 8 | ESE 9 | E 8 | ESE 8 | ESE 7 |
Wave Graph | |||||||||||||||||||||
8 | 23 | 18 | 37 | 18 | 30 | 146 | 761 | 3056 | 5428 | 4889 | 1405 | 2403 | 33 | 23 | 58 | 48 | 137 | 50 | 79 | 73 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | on | cross-on | cross | cross | cross-off | off | cross-off | off | cross-off | cross-off | cross-off | cross | cross-on | on |
High Tide | 4:38PM1.54m | 1:49AM1.61m | 5:20PM1.67m | 3:33AM1.68m | 5:47PM1.78m | 4:32AM1.81m | 6:10PM1.88m | 5:13AM1.94m | 6:32PM1.97m | 5:49AM2.06m | 6:54PM2.05m | 6:24AM2.15m | 7:16PM2.11m | ||||||||
Low Tide | 8:45PM1.43m | 10:03AM0.76m | 10:24PM1.33m | 10:55AM0.64m | 11:07PM1.21m | 11:31AM0.52m | 11:38PM1.07m | 12:00PM0.41m | 00:07AM0.94m | 12:28PM0.33m | 00:36AM0.80m | 12:54PM0.29m | 1:06AM0.68m | ||||||||
6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | |
— | 6:59 | — | — | 6:58 | — | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — | — | 6:53 | — | — | 6:52 | — | |
mm | 1 | — | 2 | — | — | — | 1 | 1 | — | 1 | 2 | 1 | — | — | 2 | 2 | 3 | 4 | 2 | 1 | 1 |
Temp °C | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 29 | 29 | 29 | 28 | 28 | 28 | 29 | 28 | 28 | 29 | 29 | 28 |
Feels °C | 27 | 29 | 29 | 29 | 29 | 29 | 30 | 29 | 29 | 31 | 30 | 31 | 30 | 29 | 30 | 29 | 28 | 28 | 31 | 32 | 31 |
Swell 1 Height (m) Direction Period (s) | SSW 8 | SE 10 | SSW 10 | SW 10 | SW 10 | SW 9 | SW 9 | ESE 16 | ESE 18 | E 17 | E 16 | NNE 10 | N 11 | WNW 11 | WNW 11 | W 11 | W 11 | W 11 | W 11 | W 10 | SSW 9 |
241 | 23 | 516 | 400 | 269 | 162 | 118 | 761 | 3056 | 5428 | 4889 | 679 | 2403 | 3342 | 2696 | 2513 | 1898 | 1242 | 646 | 320 | 165 | |
Swell 2 Height (m) Direction Period (s) | ENE 9 | ENE 9 | ESE 10 | E 14 | ESE 13 | ESE 12 | ESE 15 | SSW 9 | SSW 9 | SW 9 | SSW 9 | ENE 14 | E 11 | ESE 10 | E 9 | ESE 9 | E 8 | ESE 9 | E 8 | SSW 8 | W 10 |
8 | 8 | 18 | 37 | 18 | 30 | 146 | 101 | 88 | 36 | 55 | 1049 | 57 | 33 | 23 | 58 | 48 | 137 | 50 | 160 | 143 | |
Swell 3 Height (m) Direction Period (s) | — | — | ENE 9 | SE 10 | E 9 | E 10 | SE 9 | E 13 | ENE 10 | — | — | SSW 9 | SE 10 | E 14 | E 13 | S 8 | SSE 8 | SSW 9 | E 12 | ESE 8 | E 8 |
— | — | 16 | 4 | 6 | 7 | 3 | 3 | 19 | — | — | 100 | 17 | 15 | 14 | 36 | 46 | 54 | 11 | 35 | 29 | |
Wind waves Height (m) Direction Period (s) | S 9 | SSW 10 | SSE 6 | ESE 4 | ESE 4 | ESE 4 | E 4 | E 4 | ENE 7 | NNE 5 | N 6 | NNW 8 | W 9 | S 11 | SSW 5 | — | SW 9 | SSW 9 | SSW 9 | ESE 8 | ESE 7 |
904 | 978 | 85 | 14 | 16 | 16 | 12 | 18 | 93 | 80 | 267 | 1405 | 1359 | 37 | 109 | — | 115 | 144 | 202 | 79 | 73 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 613 | 737 | 647 | 613 | 13 | 13 | 13 | 13 | 13 | 12 | 633 | 27 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 10 | 10 |
Best forecast wave conditions in Okinawa | |||||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||||
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Information about the Tengan Surf forecast
The above surf forecast table for Tengan provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Tengan can be found by selecting the local surf guide option on the grey menu. Our Tengan 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 (Tengan) 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 Tengan 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.
Tengan is 5 km (3 miles) from the city of Ishikawa. If you plan a holiday in Okinawa, look for hotels and other accommodation in Ishikawa. Ishikawa has rooms for a wide range of budgets as well as car hire and transport links.











