Surf Forecasts:
Tengan surf forecast from 21 Aug 2026:
- Best quality surf: Wednesday 26 Aug, 3AM (local time) - 11ft (3.5m), 12s period, NNE swell with cross-offshore winds.
- Most powerful swell: Wednesday 26 Aug, 6AM (local time) - 15ft (4.5m), 11s period, NNW swell with 5,425 kJ wave energy.
- Next surfable swell (1★+): Wednesday 26 Aug, 12AM (local time) - 11ft (3.5m), 9s period with NNW 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 12AM. The primary swell is predicted to be 3.5m and 9s period with a secondary swell of 1.8m and 14s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Tengan in the next 16 days are 4.5m 11s and forecast to arrive on Wednesday (Aug 26) at 6AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 4.5m 12s period and expected on Thursday (Aug 27) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Wed 26th Aug) | 11ft (3.5m) 9s |
| Best Surf | 3AM (Wed 26th Aug) | 11ft (3.5m) 12s |
| Most Powerful | 6AM (Wed 26th Aug) | 15ft (4.5m) 11s |
Table - best surf conditions forecast for Tengan over the next 16 days.
The Lowdown
Alright, Rusty here, let’s talk surf for this spot.
We’re looking at Tengan, a reef break that’s inconsistent, so you can’t bank on it. Water temp is about 84°F, which is pretty normal for this time of year.
First few days are a write-off. From Friday the 21st through Monday the 24th, the swell is tiny – under 3ft – and the wind is mostly onshore or cross-onshore. Combined energy is weak, like 13 to 1198, but conditions are junk. Don’t bother.
Tuesday the 25th shows some hope: 8ft swell from the east, moderate cross-onshore breeze. Combined energy hits 4258 (strong), but it’s choppy. If you’re experienced and don’t mind a bumpy ride, it’s doable. Tuesday afternoon looks a bit cleaner with a gentle cross-shore.
Wednesday the 26th morning is the standout. 12ft swell from the NNW, clean offshore wind from the west at 9 mph. Combined energy is 2781 (strong). The period is 11 seconds, so not super long, but that size with glassy offshore conditions is excellent – for experts only. An 12ft wave is big territory.
Thursday the 27th and Friday the 28th, the swell drops fast, and the wind cranks up to 22 to 34 mph offshore. Too strong to paddle into the tiny waves. Energy is weak – like 56 to 109. Skip it.
Then a long flat spell from Saturday the 29th through Thursday the 3rd of September. Swell stays under 3ft, energy under 400, wind mostly cross-onshore. That’s about five or six days of nothing.
Friday the 4th of September edges up to 3ft from the east, 16 second period (long period groundswell), combined energy 538. That long period gives better shape but might run a bit straight on a reef. Wind is light cross-on.
The last good window is Saturday the 5th of September morning. Swell holds at 3ft from the ENE, 14 second period, and the wind goes glassy – calm, from the north at 3 mph. Combined energy is 442 (moderate). That’s clean, glassy conditions with a decent groundswell. For an inconsistent spot, this is a nice little session, but crowds might show up.
Bottom line: forget the first week until Wednesday the 26th morning – that’s your big one for experts. Then a dead gap, and Saturday the 5th morning is your clean, fun option.
Stay sharp,
Rusty
Short Range ForecastHeavy rain (total 26mm), heaviest during Fri morning. Warm (max 28°C on Sat morning, min 26°C on Fri morning). Mainly strong winds. | Days 4-6 Weather SummaryLight rain (total 7mm), mostly falling on Mon morning. Warm (max 29°C on Tue morning, min 27°C on Mon morning). Mainly fresh winds. | ||||||||||||||||||||
Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | |||||||||||||||
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) | ESE 10 | ESE 11 | E 14 | E 14 | E 9 | ESE 10 | ESE 5 | ESE 5 | ESE 5 | ESE 18 | ESE 17 | E 17 | E 17 | E 16 | NNW 9 | NNW 11 | E 10 | E 11 | ENE 13 | E 10 | ESE 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 11 | 11 | 4 | 4 | 2 | 18 | 39 | 35 | 48 | 243 | 1138 | 2713 | 4172 | 3573 | 1767 | 2676 | 50 | 55 | 55 | 50 | 37 |
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 | cross-on | cross-on | on | on | on | on | cross-on | cross-on | cross | cross-off | off | off | off | off | off | off |
High Tide | 2:22PM1.43m | 11:51PM1.67m | 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 | ||||||||
Low Tide | 5:48PM1.37m | 8:31AM0.85m | 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 | ||||||||
 | |  | | | |  | | | | |  | | | | | | | | | | |
 | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — |
 | — | 7:00 | — | — | 6:59 | — | — | 6:58 | — | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — | — | 6:53 | — |
mm | 16 | 2 | 2 | 1 | 2 | 1 | — | 1 | 1 | 2 | — | — | — | 2 | 3 | — | — | — | 3 | 2 | 7 |
Temp °C | 26 | 27 | 27 | 28 | 27 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 29 | 29 | 27 | 29 | 29 | 28 | 28 | 28 | 28 |
Feels °C | 26 | 27 | 26 | 27 | 26 | 28 | 29 | 29 | 28 | 29 | 29 | 29 | 32 | 32 | 30 | 31 | 31 | 31 | 28 | 27 | 26 |
Swell 1 Height (m) Direction Period (s) | SW 8 | SW 8 | SW 8 | SW 10 | SW 10 | ESE 10 | SSW 10 | SSW 9 | SSW 9 | SSW 10 | ESE 17 | E 17 | E 17 | E 16 | ENE 14 | NNW 11 | E 10 | E 11 | E 9 | WSW 11 | W 12 |
| kJ | 57 | 71 | 68 | 79 | 160 | 18 | 370 | 242 | 201 | 264 | 1138 | 2713 | 4172 | 3573 | 1267 | 2676 | 50 | 55 | 39 | 4284 | 3361 |
Swell 2 Height (m) Direction Period (s) | E 11 | ESE 10 | E 14 | E 14 | E 9 | SE 10 | ESE 14 | ESE 13 | ESE 12 | ESE 18 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SW 9 | E 11 | SE 10 | E 13 | ENE 13 | E 10 | ESE 8 |
| kJ | 2 | 10 | 4 | 4 | 2 | 15 | 20 | 17 | 30 | 243 | 180 | 143 | 71 | 54 | 42 | 87 | 4 | 14 | 55 | 50 | 37 |
Swell 3 Height (m) Direction Period (s) | ESE 10 | ESE 11 | — | E 9 | — | ENE 9 | E 9 | E 9 | ESE 15 | ESE 13 | — | ENE 10 | — | — | SSW 9 | SE 11 | SE 10 | SE 10 | SE 10 | E 18 | E 12 |
| kJ | 11 | 11 | — | 2 | — | 8 | 6 | 6 | 22 | 63 | — | 19 | — | — | 25 | 18 | 17 | 4 | 15 | 6 | 12 |
Wind waves Height (m) Direction Period (s) | SSE 6 | S 7 | S 8 | SSE 9 | SSE 9 | S 10 | ESE 5 | ESE 5 | ESE 5 | E 4 | E 6 | ENE 6 | NNE 5 | N 6 | NNW 9 | W 8 | WNW 10 | W 11 | WSW 12 | WSW 11 | S 8 |
| kJ | 216 | 229 | 419 | 878 | 554 | 802 | 39 | 35 | 48 | 24 | 60 | 66 | 86 | 247 | 1767 | 926 | 3535 | 4112 | 5108 | 2894 | 418 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 636 | 613 | 613 | 636 | 613 | 13 | 647 | 633 | 13 | 13 | 13 | 12 | 12 | 37 | 0 | 0 | 11 | 11 | 621 | 621 | 613 |
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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