Surf Forecasts:
Tengan surf forecast from 25 Aug 2026:
- Most powerful swell: Wednesday 2 Sep, 3AM (local time) - 18ft (5.5m), 10s period, N swell with 5,936 kJ wave energy.
Best Forecast Surf Conditions for Tengan this week:
The most powerful waves expected at Tengan in the next 16 days are 5.5m 10s and forecast to arrive on Wednesday (Sep 02) at 3AM. Winds are predicted to be cross-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 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 3AM (Wed 2nd Sep) | 18ft (5.5m) 10s |
Table - best surf conditions forecast for Tengan over the next 16 days.
The Lowdown
Alright, let’s talk Tengan. This is a reef break, and it’s inconsistent, so don’t get your hopes up for daily action. Water temp is about average for this time of year.
From now through the end of August, it’s dead. Wednesday the 26th to Monday the 31st – tiny surf, strong winds, and no energy. Combined swell energy is barely 42 to 155. Not worth a second look.
Then Tuesday the 1st of September shows a little life. Swell hits 6ft to 7ft from the ESE, period around 12-13 seconds. Energy jumps to 1328-2438. Wind is cross-off from the NNW, so it’s cleaner. But the swell direction isn’t ideal for Tengan (it wants NE), and the quality is marginal.
Wednesday the 2nd of September is the big one. Swell goes massive – 25ft to 26ft from the NNW, period 11-12 seconds. Combined energy is a huge 14,066 to 18,294. This is a serious groundswell. Wind is cross-off from the WNW to NW, so the waves will be clean. This is only for experts – way over 8ft. The swell direction isn’t spot on for the reef, but with that much water moving, you’ll see some bombs. This is the standout, but it’s a week out, so keep checking.
Thursday the 3rd of September stays big – 20ft to 15ft from the NW to NNW, periods 12-13 seconds, energy still huge (9820 to 6375). Clean with cross-off winds. Still only for the experienced.
After that, it fades. Friday the 4th has 12ft to 8ft from the NW, but it gets choppy. Saturday the 5th onward is back to poor with onshore winds and messy conditions. The second week shows gale-force winds and flat surf.
The best call? Wednesday the 2nd of September morning. It’s huge, clean, and powerful – but it’s a heavy reef, so only for the skilled. With the inconsistency, crowds might be light, but that size will attract a few.
Rusty.
Short Range ForecastModerate rain (total 17mm), heaviest on Tue night. Warm (max 29°C on Wed afternoon, min 27°C on Tue night). Winds decreasing (gales from the WNW on Tue night, moderate winds from the S by Thu morning). | Days 5-7 Weather SummaryLight rain (total 3mm), mostly falling on Mon morning. Warm (max 29°C on Sat morning, min 27°C on Sat night). Winds increasing (light winds from the ENE on Sat night, fresh winds from the NNE by Mon afternoon). | ||||||||||||||||||
Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | ||||||||||||||
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) | NNW 9 | NNW 9 | E 9 | E 8 | E 13 | ESE 8 | SE 5 | SE 7 | SE 6 | SE 6 | SE 7 | SE 7 | SE 6 | ESE 7 | ESE 8 | ESE 10 | ESE 10 | ESE 10 | ESE 11 |
Wave Graph  | |||||||||||||||||||
 kJ | 2814 | 1473 | 26 | 33 | 30 | 35 | 49 | 91 | 141 | 94 | 85 | 63 | 43 | 38 | 76 | 204 | 327 | 367 | 540 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross-off | cross-off | cross | cross | cross-on | cross-on | cross-on | cross-on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross |
High Tide | 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 | 8:13AM2.12m | 8:29PM2.15m | |||||||
Low Tide | 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 | 2:18PM0.49m | 2:47AM0.45m | ||||||
 |  |  |  |  | |  |  | |  | | | | | | | | | | |
 | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — |
 | 6:55 | — | 6:54 | — | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:50 | — |
mm | 6 | 6 | 2 | — | — | — | 2 | — | 1 | — | — | — | — | — | — | — | 1 | 2 | 3 |
Temp °C | 28 | 28 | 29 | 28 | 29 | 29 | 28 | 29 | 29 | 28 | 29 | 29 | 27 | 29 | 29 | 27 | 28 | 28 | 28 |
Feels °C | 22 | 25 | 27 | 28 | 30 | 30 | 30 | 30 | 31 | 30 | 31 | 31 | 29 | 29 | 30 | 27 | 28 | 27 | 27 |
Swell 1 Height (m) Direction Period (s) | NE 11 | NNW 9 | WNW 9 | WNW 9 | WNW 10 | W 11 | W 11 | W 10 | W 10 | SW 10 | SSW 10 | SSW 9 | SW 9 | SW 9 | ESE 8 | ESE 10 | ESE 10 | ESE 10 | ESE 11 |
| kJ | 1508 | 1473 | 1080 | 885 | 471 | 1747 | 1018 | 556 | 294 | 131 | 188 | 151 | 99 | 49 | 76 | 204 | 327 | 367 | 540 |
Swell 2 Height (m) Direction Period (s) | ESE 12 | E 10 | E 9 | E 8 | ESE 7 | E 13 | SW 9 | SSW 9 | SW 9 | W 10 | W 9 | W 8 | S 9 | S 9 | SSW 9 | S 9 | SW 10 | SW 10 | SW 10 |
| kJ | 113 | 75 | 26 | 33 | 18 | 28 | 77 | 147 | 95 | 121 | 56 | 21 | 40 | 57 | 101 | 41 | 34 | 34 | 35 |
Swell 3 Height (m) Direction Period (s) | S 9 | E 15 | E 14 | E 13 | E 13 | E 18 | E 12 | E 12 | E 12 | S 7 | ENE 13 | E 13 | ENE 12 | ENE 12 | ENE 12 | SW 9 | SSW 8 | SSW 9 | SSW 10 |
| kJ | 1 | 4 | 16 | 31 | 30 | 6 | 25 | 11 | 11 | 27 | 17 | 30 | 30 | 14 | 14 | 26 | 24 | 16 | 19 |
Wind waves Height (m) Direction Period (s) | NNW 9 | WSW 8 | SW 7 | SSW 6 | WSW 9 | ESE 8 | SE 5 | SE 7 | SE 6 | SE 6 | SE 7 | SE 7 | SE 6 | ESE 7 | — | ENE 4 | NE 4 | NE 5 | NNE 6 |
| kJ | 2814 | 899 | 474 | 156 | 644 | 35 | 49 | 91 | 141 | 94 | 85 | 63 | 43 | 38 | — | 13 | 19 | 70 | 135 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 621 | 621 | 613 | 621 | 613 | 52 | 28 | 613 | 13 | 13 | 10 | 13 | 12 | 12 | 12 | 631 | 647 | 647 | 621 |
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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