Surf Forecasts:
Tengan surf forecast from 14 Aug 2026:
- Most powerful swell: Thursday 20 Aug, 12AM (local time) - 3.5ft (1.1m), 8s period, E swell with 135 kJ wave energy.
Best Forecast Surf Conditions for Tengan this week:
The most powerful waves expected at Tengan in the next 16 days are 1.1m 8s and forecast to arrive on Thursday (Aug 20) at 12AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 8s period and expected on Sunday (Aug 16) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 12AM (Thu 20th Aug) | 3.5ft (1.1m) 8s |
Table - best surf conditions forecast for Tengan over the next 16 days.
The Lowdown
Alright, let’s talk about Tengan. I’ve had a good look at the charts and the outlook for the next 16 days, and I’ll be straight with you – it’s a rough stretch. The water temperature is sitting at 84°F, which is about average for this time of year, so at least you won’t freeze while you’re staring at flat lines.
The first glimmer of anything surfable doesn’t show up until Wednesday the 26th of August. Before that, it’s a long, flat grind. From now right through to Tuesday the 25th, the waves are tiny, the wind is mostly onshore, and the conditions are just poor. There’s no point even paddling out. You’re looking at a solid 12-day gap with nothing worth recommending.
On Wednesday the 26th, we finally get a little pulse. The morning shows a weak 2-foot swell from the east, with a period of 12 seconds, and the combined swell energy is a modest 103 (moderate). The wind is light offshore from the west, so the surface will be clean, and the report says it’s surfable but very ordinary. The afternoon stays clean with gentle offshore wind, but the energy drops slightly. It’s not a standout by any stretch, but it’s the best we’ve got.
After that, the rest of the outlook is more of the same – tiny waves, mostly cross-offshore winds, and very low energy. Nothing to write home about.
So, if you’re desperate for a paddle, Wednesday the 26th morning is your only real window. But honestly, this is a tough period for Tengan. Keep your board waxed and hope the forecasts change.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Sun morning. Warm (max 29°C on Fri afternoon, min 27°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 5mm), mostly falling on Wed night. Warm (max 29°C on Wed afternoon, min 27°C on Mon afternoon). Wind will be generally light. | |||||||||||||||||||
Fri 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | ||||||||||||||
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 10 | SW 9 | ENE 11 | ENE 11 | ENE 10 | ENE 10 | ENE 10 | ESE 4 | ENE 10 | ENE 10 | ENE 10 | ESE 5 | E 5 | ESE 6 | E 7 | E 7 | E 8 | E 7 | E 7 | ESE 6 |
Wave Graph  | ||||||||||||||||||||
 kJ | 9 | 0 | 23 | 23 | 20 | 20 | 20 | 20 | 20 | 19 | 19 | 39 | 42 | 62 | 91 | 114 | 135 | 37 | 24 | 7 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | on | on | on | cross-on | on | cross-on | on | on | on | on | on | on | on | on | on | on | on | cross |
High Tide | 8:11PM2.17m | 7:59AM2.21m | 8:39PM2.15m | 8:41AM2.10m | 9:05PM2.12m | 9:22AM1.96m | 9:29PM2.06m | 10:05AM1.80m | 9:55PM1.99m | 10:54AM1.63m | 10:22PM1.90m | 12:02PM1.49m | 10:56PM1.79m | |||||||
Low Tide | 2:04AM0.69m | 2:22PM0.31m | 2:42AM0.63m | 2:52PM0.48m | 3:19AM0.60m | 3:21PM0.66m | 3:57AM0.62m | 3:48PM0.85m | 4:38AM0.67m | 4:16PM1.03m | 5:27AM0.75m | 4:49PM1.21m | ||||||||
 |  | | | |  | |  |  | | | | | | | |  | | |  | |
 | — | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — |
 | 7:06 | — | — | 7:05 | — | — | 7:04 | — | — | 7:04 | — | — | 7:02 | — | — | 7:01 | — | — | 7:00 | — |
mm | — | — | — | — | — | 2 | 2 | — | — | — | — | — | — | — | — | — | 3 | 2 | 3 | 3 |
Temp °C | 29 | 28 | 29 | 29 | 28 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 29 | 27 | 28 | 29 | 27 |
Feels °C | 33 | 33 | 34 | 33 | 32 | 31 | 30 | 29 | 29 | 29 | 28 | 30 | 29 | 28 | 29 | 30 | 29 | 32 | 32 | 31 |
Swell 1 Height (m) Direction Period (s) | SSW 8 | SW 9 | SW 8 | SSW 8 | SSW 8 | SSW 8 | SW 8 | SW 9 | SW 9 | SW 9 | SW 9 | SSW 9 | SW 9 | SSW 9 | SW 8 | SSW 8 | S 9 | E 7 | S 10 | S 9 |
| kJ | 78 | 59 | 69 | 52 | 55 | 92 | 69 | 81 | 81 | 75 | 75 | 70 | 38 | 54 | 24 | 13 | 27 | 37 | 66 | 78 |
Swell 2 Height (m) Direction Period (s) | N 6 | S 8 | S 9 | ENE 11 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | SSW 8 | ENE 9 | S 9 | SW 9 | SW 9 | S 8 | E 7 | SW 10 |
| kJ | 7 | 21 | 14 | 23 | 20 | 20 | 20 | 19 | 20 | 19 | 19 | 18 | 22 | 16 | 13 | 12 | 13 | 35 | 24 | 15 |
Swell 3 Height (m) Direction Period (s) | ENE 10 | W 6 | ENE 11 | SSE 8 | W 6 | W 6 | W 6 | SE 11 | S 8 | ESE 11 | SE 10 | SE 10 | SE 10 | SE 10 | ESE 10 | SE 10 | SW 9 | NNE 4 | SW 9 | ESE 6 |
| kJ | 9 | 7 | 23 | 14 | 3 | 3 | 2 | 4 | 5 | 11 | 4 | 4 | 4 | 4 | 10 | 4 | 13 | 4 | 13 | 7 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | ESE 3 | ESE 5 | ESE 3 | ESE 4 | ESE 5 | ESE 5 | ESE 4 | ESE 5 | E 5 | ESE 6 | E 7 | E 7 | E 8 | — | — | S 3 |
| kJ | — | — | — | — | 2 | 14 | 6 | 20 | 18 | 15 | 10 | 39 | 42 | 62 | 91 | 114 | 135 | — | — | 3 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 27 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 12 | 12 | 12 | 12 | 12 | 13 |
Best forecast wave conditions in Okinawa | ||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Tengan surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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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