Surf Forecasts:
Tengan surf forecast from 10 Aug 2026:
- Most powerful swell: Monday 10 Aug, 6PM (local time) - 3ft (0.9m), 13s period, E swell with 273 kJ wave energy.
Best Forecast Surf Conditions for Tengan this week:
The most powerful waves expected at Tengan in the next 16 days are 0.9m 13s and forecast to arrive on Monday (Aug 10) at 6PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 11s period and expected on Monday (Aug 10) at 6PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 6PM (Mon 10th Aug) | 3ft (0.9m) 13s |
Table - best surf conditions forecast for Tengan over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s talk about what’s on the cards for Tengan over the next couple of weeks, and I’ll be straight with you – it’s a tough stretch.
Looking at the whole 16-day window, the story is pretty much the same from start to finish: there’s just no real surf to get excited about. The first recommendation doesn’t pop up until Monday the 10th of August, and from there, it’s a relentless run of poor conditions. For the entire period, the wave energy is weak, mostly two-digit values like (61) or (73), dipping down to single digits like (7) or (9), with only a few brief moments scraping up to a weak (54). The swell heights are tiny – we’re talking 0.7 ft to 3 ft at best – and the period is generally short, around 6 to 8 seconds, meaning no punch or shape. There’s no standout session in the whole 16-day outlook, not a single window where everything lines up.
With the water temperature sitting around 86 °F and an anomaly of 2 °F, it’s just about average for this time of year, so no surprises there.
Because the swell is so small and the quality is consistently poor, there really isn’t a "best on offer" here. Every day is marked by poor surf conditions. The wind is a constant problem – mostly cross-on or onshore, often moderate to fresh, keeping the surface choppy or lumpy. We do see a brief window on Wednesday afternoon, the 12th of August, where it goes cross-off and clean, but the swell is only 1 ft from the ENE with a short period (11 seconds is moderate, but the height is just too small). Thursday the 13th and Friday the 14th have some onshore and light variable winds, but again, the swell is insignificant. The second week continues the same theme: small, weak, and messy, with onshore winds dominating. By the time we hit the 25th of August, there’s literally no swell height recorded.
This is one of those blank runs where the area just isn’t offering anything. Tengan is an inconsistent reef break, and right now, it’s not breaking in any way worth paddling out for. If you’ve got a kite, the stronger cross-onshore winds on some of those afternoons (like the 20th and 21st of August with 22 mph winds) might look more interesting than trying to surf this nothing swell.
Stay patient, keep an eye out, but for now, the board can stay in the car.
Rusty
Short Range ForecastLight rain (total 6mm), mostly falling on Mon night. Warm (max 30°C on Tue afternoon, min 27°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 39mm), heaviest during Thu night. Warm (max 29°C on Thu morning, min 27°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | |||||||||||||||
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) | SW 11 | ESE 7 | E 12 | E 12 | E 12 | ENE 12 | ENE 11 | ENE 11 | N 9 | N 8 | N 7 | SW 8 | N 7 | N 6 | E 5 | E 6 | ENE 11 | E 6 | E 6 | E 6 | ESE 5 |
Wave Graph  | |||||||||||||||||||||
 kJ | 0 | 61 | 199 | 73 | 72 | 46 | 40 | 39 | 24 | 28 | 25 | 0 | 16 | 7 | 5 | 11 | 23 | 35 | 34 | 33 | 39 |
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 | cross-on | cross | cross-off | cross | cross-on | on | on | on | on | on | on | on | cross-on | cross-on | on | on |
High Tide | 5:50PM1.94m | 4:48AM2.07m | 6:30PM2.05m | 5:43AM2.19m | 7:07PM2.13m | 6:32AM2.26m | 7:41PM2.16m | 7:17AM2.27m | 8:11PM2.17m | 7:59AM2.21m | 8:39PM2.15m | 8:41AM2.10m | 9:05PM2.12m | ||||||||
Low Tide | 10:54AM0.32m | 11:13PM1.17m | 11:46AM0.19m | 00:02AM1.03m | 12:32PM0.12m | 00:45AM0.90m | 1:12PM0.12m | 1:25AM0.78m | 1:49PM0.19m | 2:04AM0.69m | 2:22PM0.31m | 2:42AM0.63m | 2:52PM0.48m | ||||||||
 |  |  |  | |  | |  | | | | | | | | | | | | | | |
 | 5:56 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 6:00 | — | — | 6:00 | — | — |
 | — | 7:08 | — | — | 7:08 | — | — | 7:07 | — | — | 7:07 | — | — | 7:06 | — | — | 7:05 | — | — | 7:04 | — |
mm | — | — | 1 | 2 | — | — | 2 | — | 1 | 4 | 6 | 7 | 3 | 5 | 13 | 1 | — | — | 1 | 1 | — |
Temp °C | 29 | 29 | 28 | 29 | 30 | 28 | 27 | 27 | 27 | 29 | 29 | 27 | 28 | 29 | 27 | 28 | 29 | 28 | 28 | 29 | 28 |
Feels °C | 31 | 31 | 31 | 33 | 34 | 32 | 29 | 29 | 32 | 34 | 33 | 31 | 33 | 33 | 30 | 30 | 31 | 31 | 30 | 31 | 30 |
Swell 1 Height (m) Direction Period (s) | SW 11 | SW 11 | S 10 | SW 10 | SW 10 | SW 9 | SW 9 | SW 9 | S 9 | SW 8 | SW 8 | SW 8 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SW 8 | SSW 9 | SW 9 |
| kJ | 558 | 496 | 252 | 222 | 192 | 144 | 119 | 79 | 76 | 55 | 43 | 44 | 116 | 116 | 116 | 116 | 124 | 124 | 84 | 94 | 79 |
Swell 2 Height (m) Direction Period (s) | S 11 | S 11 | SW 10 | S 10 | S 9 | S 10 | S 9 | S 9 | SW 8 | N 8 | S 8 | S 9 | W 8 | W 7 | W 6 | W 8 | W 7 | W 6 | S 9 | ENE 10 | S 9 |
| kJ | 388 | 272 | 266 | 192 | 140 | 143 | 106 | 73 | 54 | 28 | 35 | 39 | 45 | 34 | 19 | 28 | 23 | 12 | 41 | 20 | 14 |
Swell 3 Height (m) Direction Period (s) | W 10 | W 10 | E 12 | E 12 | E 12 | ENE 12 | ENE 11 | ENE 11 | N 9 | S 9 | N 7 | W 5 | N 7 | N 6 | E 5 | E 6 | ENE 11 | ENE 11 | ENE 10 | W 7 | ENE 10 |
| kJ | 247 | 116 | 199 | 73 | 72 | 46 | 40 | 39 | 24 | 40 | 25 | 13 | 16 | 7 | 5 | 11 | 23 | 22 | 20 | 8 | 20 |
Wind waves Height (m) Direction Period (s) | — | ESE 7 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | E 6 | E 6 | E 6 | E 6 | ESE 5 |
| kJ | — | 61 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 11 | 35 | 34 | 33 | 39 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 10 | 10 | 10 | 10 | 10 | 12 | 636 | 636 | 12 | 12 | 12 | 12 | 10 | 12 | 13 | 13 | 13 | 13 | 13 | 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.
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