Surf Forecasts:
Tengan surf forecast from 24 Aug 2026:
- Most powerful swell: Wednesday 26 Aug, 3AM (local time) - 20ft (6.0m), 11s period, NNW swell with 8,592 kJ wave energy.
Best Forecast Surf Conditions for Tengan this week:
The most powerful waves expected at Tengan in the next 16 days are 6.0m 11s and forecast to arrive on Wednesday (Aug 26) at 3AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 4.0m 8s period and expected on Wednesday (Aug 26) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 3AM (Wed 26th Aug) | 20ft (6.0m) 11s |
Table - best surf conditions forecast for Tengan over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s be straight with you – we’re looking at a tough 16-day stretch ahead.
First up, we get a little tease of swell on Monday the 24th, but it’s junk. The only break on the cards is Tengan, a reef setup, and the conditions are a write-off with onshore wind and a risk of thunderstorms. The water’s at 84°, pretty average for this time of year. That 3 ft swell (601 combined energy) from the ESE won’t be worth paddling out for.
Then we hit a real rough patch. From Tuesday the 25th through Monday the 31st, it’s basically all no-go. There’s some serious size showing up – Tuesday morning has 10 ft (5483 energy) and Tuesday afternoon has 12 ft (6237 energy) – but it’s all cross-shore or howling onshore wind. A couple of days even see gale-force offshore winds, but that 40 mph blast will make it nearly impossible to even get out. The swell periods are short and messy, too. It’s a full week of nothing but frustration.
September 1st and 2nd offer a bit of a tease. Swell bumps up to 5 ft on Wednesday morning (884 energy) and 6 ft on Wednesday afternoon (1218 energy), coming from the ESE with a 10-second period. The wind is a moderate, steady cross-onshore though, so it’s going to be choppy. Better than the junk we’ve been looking at, but still far from clean.
Now, here’s the only window that might get your heart beating a little. September 3rd and 4th show some potential. Thursday the 3rd has 8 ft ESE swell with a long 12-second period (2161 energy). The catch is a fresh cross-shore breeze, so it’ll be lumpy and a bit of a battle. This size is for experienced surfers only. But then we get Friday the 4th: the northwest wind switches to a light cross-offshore, 9-15 mph, and we’ve got a solid 8 ft swell from the north with a 9 to 10-second period (around 1400 energy). The wind will keep it clean. This is your best bet of the entire forecast, but it’s still only a *marginal* tick. It’s a promising but less certain long-range call. For a reef break like Tengan, that north swell direction isn’t perfect, but it’s the only real chance you’ll get.
The weekend of the 5th and 6th drops off again. That north swell fades, the wind turns onshore, and we’re back to chop. After that, from the 7th of September onward, it’s more onshore slop and thunderstorms with weak, short-period swell.
It’s a grim run, lads. The bottom line: if you’re keen, aim for Friday the 4th of September at Tengan. It’s not a classic, but it’s the only time the stars even partially align. For now, I’d be checking the forecast again in a few days.
Rusty.
Short Range ForecastHeavy rain (total 30mm), heaviest during Tue afternoon. Warm (max 29°C on Tue morning, min 27°C on Mon night). Winds increasing (light winds from the NE on Mon night, gales from the WNW by Tue night). | Days 5-7 Weather SummarySome drizzle, heaviest during Fri night. Warm (max 29°C on Fri morning, min 27°C on Fri night). Mainly strong winds. | ||||||||||||||||||
Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | ||||||||||||||
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 17 | ESE 17 | E 16 | NW 9 | NNW 10 | NW 10 | E 13 | E 13 | E 13 | SE 6 | ESE 7 | SE 8 | SE 8 | ENE 13 | SE 8 | SE 7 | ESE 6 | E 6 | ESE 8 |
Wave Graph | |||||||||||||||||||
2523 | 5791 | 5775 | 2305 | 2939 | 2262 | 31 | 30 | 28 | 114 | 350 | 619 | 284 | 17 | 269 | 88 | 48 | 60 | 140 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | cross-on | cross-on | cross-on | cross-on | on | on | on | on | cross-on | cross-on |
High Tide | 4:32AM1.81m | 6:10PM1.88m | 5:13AM1.94m | 6:32PM1.97m | 5:49AM2.06m | 6:54PM2.05m | 6:24AM2.15m | 7:16PM2.11m | 6:59AM2.19m | 7:39PM2.15m | 7:35AM2.18m | 8:04PM2.16m | |||||||
Low Tide | 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 | 1:22PM0.30m | 1:38AM0.57m | 1:49PM0.37m | 2:12AM0.50m | ||||||
— | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | |
6:57 | — | 6:55 | — | — | 6:54 | — | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — | |
mm | — | — | 5 | 10 | 5 | 4 | 6 | — | — | — | — | — | 1 | — | — | — | — | — | — |
Temp °C | 28 | 29 | 29 | 28 | 28 | 28 | 28 | 29 | 29 | 28 | 29 | 29 | 28 | 29 | 29 | 28 | 29 | 29 | 28 |
Feels °C | 30 | 29 | 28 | 21 | 25 | 25 | 25 | 27 | 29 | 28 | 29 | 28 | 29 | 30 | 30 | 30 | 29 | 29 | 28 |
Swell 1 Height (m) Direction Period (s) | ESE 17 | ESE 17 | E 16 | NNE 10 | NNW 10 | NW 10 | W 11 | W 11 | WSW 12 | WSW 12 | WSW 11 | WSW 11 | SW 10 | SW 10 | SW 10 | SW 10 | SW 9 | SW 9 | ESE 8 |
2523 | 5791 | 5775 | 1723 | 2939 | 2262 | 3077 | 3276 | 4641 | 2315 | 889 | 356 | 225 | 196 | 229 | 150 | 81 | 68 | 140 | |
Swell 2 Height (m) Direction Period (s) | SW 9 | SW 9 | SW 9 | ENE 13 | E 11 | E 9 | ESE 8 | ESE 8 | E 13 | E 12 | SSW 9 | SSW 10 | WSW 9 | W 9 | ENE 13 | S 9 | S 10 | S 9 | S 9 |
78 | 50 | 27 | 1535 | 64 | 28 | 13 | 19 | 28 | 11 | 103 | 171 | 28 | 13 | 33 | 63 | 67 | 54 | 60 | |
Swell 3 Height (m) Direction Period (s) | ENE 10 | — | — | S 8 | SE 11 | E 14 | E 13 | E 13 | E 18 | E 16 | E 12 | E 15 | E 13 | ENE 13 | W 9 | ENE 12 | ENE 12 | ENE 12 | SW 10 |
19 | — | — | 1 | 4 | 16 | 31 | 30 | 6 | 5 | 11 | 17 | 14 | 17 | 6 | 15 | 14 | 14 | 58 | |
Wind waves Height (m) Direction Period (s) | E 7 | NNE 5 | N 6 | NW 9 | WSW 8 | SW 8 | SSW 8 | SSW 9 | SSE 6 | SE 6 | ESE 7 | SE 8 | SE 8 | SE 9 | SE 8 | SE 7 | ESE 6 | E 6 | ENE 4 |
97 | 77 | 328 | 2305 | 1828 | 1082 | 1137 | 1004 | 298 | 114 | 350 | 619 | 284 | 505 | 269 | 88 | 48 | 60 | 18 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 12 | 12 | 613 | 621 | 621 | 621 | 621 | 621 | 732 | 732 | 52 | 13 | 28 | 28 | 52 | 647 | 10 | 13 | 13 |
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.











