Surf Forecasts:
Tengan surf forecast from 8 Aug 2026:
- Most powerful swell: Monday 10 Aug, 6AM (local time) - 2.5ft (0.7m), 14s period, E swell with 198 kJ wave energy.
Best Forecast Surf Conditions for Tengan this week:
The most powerful waves expected at Tengan in the next 16 days are 0.7m 14s and forecast to arrive on Monday (Aug 10) at 6AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 6.5m 12s period and expected on Saturday (Aug 08) at 3PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 6AM (Mon 10th Aug) | 2.5ft (0.7m) 14s |
Table - best surf conditions forecast for Tengan over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s on the cards for Tengan over the next couple of weeks.
First off, I’ve got to be straight with you – the outlook is a tough one for the next week or so. The water temp is sitting at 86°, which is a touch warmer than normal for this time of year, so at least the wait won't be a cold one. But the waves? For the first week, from Saturday the 8th right through to about Monday the 17th, it’s pretty grim. There’s a lot of poor surf conditions, strong cross-shore winds, and stormy weather kicking up a mess. The wave energy is mostly weak, with readings around 130 on Saturday morning, though it bumps up to a moderate 188 on Sunday morning. Still, with those winds, it’s just not worth paddling out. The swell is tiny, only 2 ft to 3 ft, and coming from the ENE, which isn’t the optimum direction for this spot. A few mornings around the 12th and 14th look clean with light winds, but the swell is so small (1 ft) and short-period that it’s barely a ripple. You’ll see a period of 6 seconds on the 14th – that’s just wind chop.
Now, there’s a bit of a gap from the 13th to the 16th where the energy drops to zero or near-zero, and then we start to see some change. The standout period is much further out: Thursday the 20th and Friday the 21st. The combined swell energy (1443) is strong to very strong, with a solid 8 ft swell from the ESE on the 20th, and a period of 10 seconds. That’s decent groundswell. But here’s the catch – the wind is onshore, blowing from the east at 28 mph, and Tengan is a reef break. With that much swell and onshore wind, it’s going to be a messy, blown-out affair. On the 21st, it drops to 7 ft from the SE, with 9-second period, but still onshore. This setup looks more interesting for kite surfing than paddle surfing, to be honest. The size and energy are there, but the quality is going to be poor for a surfer.
For a break that’s inconsistent and exposed to the NE, the optimum swell direction is from the NE, and we’re not getting that. The best I can say is that if you’re desperate and just want to get wet, the Wednesday morning of the 12th might offer a tiny, clean wave, but it’s a long shot. The real energy comes in the second week, but it’s not clean. Keep your eyes on the forecasts, but for now, I wouldn’t be rushing to Tengan.
Rusty.
Short Range ForecastHeavy rain (total 54mm), heaviest during Sat morning. Warm (max 30°C on Mon morning, min 28°C on Sat morning). Winds decreasing (severe gales from the S on Sat morning, moderate winds from the SSE by Mon night). | Days 4-6 Weather SummaryModerate rain (total 14mm), heaviest on Wed afternoon. Warm (max 30°C on Tue morning, min 28°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | |||||||||||||||
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 11 | ENE 10 | E 10 | ENE 10 | E 9 | E 14 | E 14 | E 13 | SW 11 | SW 11 | SW 10 | SW 10 | ENE 11 | ENE 11 | SW 9 | SW 9 | SW 9 | SW 9 | ESE 6 | ESE 6 | ESE 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 70 | 115 | 50 | 123 | 45 | 140 | 184 | 171 | 0 | 0 | 0 | 0 | 40 | 39 | 0 | 0 | 0 | 0 | 12 | 15 | 15 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross-on | cross-on | cross-on | cross | cross | cross | cross-off | cross-off | cross | on | cross | cross | cross-on | cross-off | cross-off | cross-on |
High Tide | 3:47PM1.64m | 2:16AM1.84m | 5:01PM1.80m | 3:42AM1.94m | 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 | ||||||||
Low Tide | 8:33PM1.36m | 9:48AM0.48m | 10:11PM1.29m | 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 | ||||||||
 | |  | | | | | | |  | |  | | | | | | | | |  | |
 | 5:56 | — | — | 5:56 | — | — | 5:56 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — |
 | — | 7:10 | — | — | 7:09 | — | — | 7:08 | — | — | 7:08 | — | — | 7:07 | — | — | 7:07 | — | — | 7:06 | — |
mm | 18 | 4 | 6 | 5 | 4 | 8 | 2 | 3 | 4 | — | 1 | — | 1 | 4 | 1 | 1 | 2 | 4 | 4 | 6 | 2 |
Temp °C | 28 | 28 | 28 | 28 | 29 | 28 | 30 | 30 | 28 | 30 | 30 | 28 | 29 | 29 | 28 | 30 | 30 | 28 | 29 | 28 | 27 |
Feels °C | 20 | 21 | 22 | 27 | 28 | 27 | 31 | 32 | 30 | 33 | 33 | 31 | 34 | 33 | 33 | 35 | 34 | 33 | 33 | 32 | 31 |
Swell 1 Height (m) Direction Period (s) | ENE 11 | ENE 10 | WSW 12 | E 10 | WSW 12 | W 11 | SW 11 | SW 11 | SW 11 | SW 11 | SW 10 | SW 10 | S 10 | SW 10 | SW 9 | SW 9 | SW 9 | SW 9 | SSW 8 | SW 9 | SW 8 |
| kJ | 70 | 115 | 2995 | 48 | 3005 | 1107 | 952 | 898 | 585 | 574 | 391 | 459 | 143 | 154 | 122 | 117 | 93 | 62 | 103 | 62 | 58 |
Swell 2 Height (m) Direction Period (s) | N 9 | E 15 | E 10 | ENE 10 | E 9 | E 14 | W 11 | W 10 | S 10 | S 10 | S 10 | S 10 | SW 9 | S 9 | S 9 | S 9 | S 8 | S 9 | ESE 6 | S 8 | S 9 |
| kJ | 43 | 17 | 50 | 123 | 45 | 140 | 524 | 294 | 468 | 296 | 311 | 146 | 122 | 104 | 102 | 78 | 51 | 60 | 12 | 22 | 40 |
Swell 3 Height (m) Direction Period (s) | NNE 13 | — | E 15 | E 15 | ENE 15 | — | E 14 | E 13 | W 10 | W 9 | W 9 | W 8 | ENE 11 | ENE 11 | W 6 | W 8 | WNW 7 | W 7 | W 8 | ESE 6 | ESE 6 |
| kJ | 17 | — | 4 | 17 | 43 | — | 184 | 171 | 196 | 81 | 55 | 46 | 40 | 39 | 20 | 20 | 31 | 17 | 21 | 15 | 15 |
Wind waves Height (m) Direction Period (s) | S 11 | SSW 12 | S 11 | SW 13 | S 10 | S 10 | S 10 | S 11 | — | — | — | S 10 | WSW 6 | W 7 | — | — | — | — | — | — | — |
| kJ | 9020 | 11635 | 4267 | 7595 | 1509 | 2072 | 720 | 617 | — | — | — | 371 | 71 | 48 | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 980 | 745 | 737 | 635 | 631 | 613 | 621 | 613 | 613 | 613 | 647 | 621 | 10 | 10 | 12 | 12 | 12 | 12 | 14 | 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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