Surf Forecasts:
Tengan surf forecast from 18 Aug 2026:
- Best quality surf: Friday 21 Aug, 6PM (local time) - 5ft (1.5m), 7s period, SE swell with glassy winds.
- Most powerful swell: Wednesday 26 Aug, 3AM (local time) - 5.5ft (1.7m), 14s period, ESE swell with 1,154 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 6PM (local time) - 5ft (1.5m), 7s period with SE 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 Friday (Aug 21) at 6PM. The primary swell is predicted to be 1.5m and 7s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Tengan in the next 16 days are 1.7m 14s and forecast to arrive on Wednesday (Aug 26) at 3AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.0m 9s period and expected on Sunday (Aug 23) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Fri 21st Aug) | 5ft (1.5m) 7s |
| Best Surf | 6PM (Fri 21st Aug) | 5ft (1.5m) 7s |
| Most Powerful | 3AM (Wed 26th Aug) | 5.5ft (1.7m) 14s |
Table - best surf conditions forecast for Tengan over the next 16 days.
The Lowdown
Howdy, Rusty here. Look, we got one spot in the mix: Tengan, a reef break. And for the first chunk of this 16-day run, it’s no good. There’s about a 7-day stretch of nothing but onshore wind and tiny, weak swell. Don’t bother.
The big moment is Thursday, August 27th. That morning, we got a solid 12ft swell out of the ESE, with a real long period of 16 seconds - that’s proper groundswell. The combined energy is a massive 5552, and with clean offshore wind from the west, it’s gonna be a standout session. But I gotta tell you, this is for experienced riders only. The size and power are serious. The water temp is about normal for this time of year. The afternoon hits even bigger at 12ft, energy up to 6675, with cross-offshore breeze, still clean. Remember, it’s a reef, and with that long period, the sets will roll in with a lot of power, and the lineup might get a bit tricky. Experts only.
Before that, Wednesday the 26th is a good warm-up: about 6ft to 7ft swell from the ESE, period around 14-15 seconds. Energy is between 1308 and 2020. The wind is cross-offshore, so it’s clean. They call it marginal, but for a local, it’s a decent paddle.
After Thursday, the wind shifts. Friday the 28th starts with an 12ft swell but onshore wind turns it to junk by the afternoon. Then it gets big but blown out - Saturday the 29th sees 20ft swell but with strong onshore wind, totally unsurfable. There’s a glimmer on Monday the 31st and Tuesday the 1st of September with 6ft to 8ft swell from the north, but the wind is cross or cross-onshore, making it lumpy. Not worth a special trip.
So here’s the deal: the first week is a washout. The one to circle is Thursday, August 27th at Tengan. That’s your best shot.
Rusty.
Short Range ForecastHeavy rain (total 40mm), heaviest during Thu night. Warm (max 28°C on Tue night, min 26°C on Fri morning). Mainly fresh winds. | Days 5-7 Weather SummaryHeavy rain (total 34mm), heaviest during Sat night. Warm (max 28°C on Sat morning, min 26°C on Fri night). Mainly strong winds. | ||||||||||||||||||
Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | ||||||||||||||
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) | E 7 | E 7 | E 7 | ESE 7 | ESE 8 | ESE 8 | SE 8 | ESE 7 | SE 7 | SE 8 | ENE 9 | SE 7 | SSE 8 | S 9 | E 14 | E 10 | SE 5 | SE 5 | ESE 6 |
Wave Graph  | |||||||||||||||||||
 kJ | 123 | 177 | 220 | 237 | 176 | 161 | 229 | 142 | 258 | 811 | 8 | 262 | 0 | 0 | 4 | 2 | 69 | 67 | 87 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | cross-on | cross-on | cross | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-on | on | on | on | on | on |
High Tide | 9:55PM1.99m | 10:54AM1.63m | 10:22PM1.90m | 12:02PM1.49m | 10:56PM1.79m | 2:22PM1.43m | 11:51PM1.67m | 4:38PM1.54m | 1:49AM1.61m | 5:20PM1.67m | 3:33AM1.68m | 5:47PM1.78m | |||||||
Low Tide | 4:38AM0.67m | 4:16PM1.03m | 5:27AM0.75m | 4:49PM1.21m | 6:38AM0.83m | 5:48PM1.37m | 8:31AM0.85m | 8:45PM1.43m | 10:03AM0.76m | 10:24PM1.33m | 10:55AM0.64m | 11:07PM1.21m | |||||||
 |  | | | | | | | |  | | | | | | | | | | |
 | — | 6:01 | — | — | 6:01 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — |
 | 7:02 | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — | — | 6:59 | — | — | 6:58 | — | — | 6:57 | — |
mm | 2 | 3 | 4 | 8 | 2 | 2 | 9 | 5 | 5 | 9 | 3 | 3 | 8 | 2 | 2 | 3 | 2 | 2 | 1 |
Temp °C | 28 | 28 | 28 | 28 | 28 | 28 | 27 | 27 | 27 | 27 | 28 | 28 | 27 | 28 | 28 | 28 | 28 | 28 | 27 |
Feels °C | 30 | 29 | 29 | 30 | 29 | 29 | 29 | 29 | 28 | 29 | 28 | 29 | 25 | 26 | 26 | 26 | 27 | 28 | 27 |
Swell 1 Height (m) Direction Period (s) | SW 9 | SW 9 | SW 8 | S 9 | S 10 | S 9 | S 9 | S 9 | SW 9 | SSW 10 | SW 10 | SW 10 | SW 10 | SW 11 | SW 11 | SW 10 | SSW 9 | SSW 8 | SSW 8 |
| kJ | 36 | 19 | 11 | 13 | 45 | 85 | 79 | 165 | 202 | 349 | 416 | 318 | 290 | 137 | 159 | 108 | 276 | 118 | 118 |
Swell 2 Height (m) Direction Period (s) | E 10 | S 8 | S 8 | SW 8 | SW 9 | SW 9 | SW 9 | SW 8 | S 9 | SSW 10 | ENE 9 | S 8 | W 7 | W 8 | W 8 | W 9 | SW 10 | SW 10 | SW 9 |
| kJ | 7 | 1 | 5 | 11 | 12 | 13 | 12 | 44 | 76 | 511 | 8 | 66 | 8 | 29 | 18 | 15 | 63 | 76 | 52 |
Swell 3 Height (m) Direction Period (s) | SE 10 | SE 10 | — | — | SE 9 | — | ESE 10 | — | — | NE 9 | E 10 | — | — | — | E 14 | E 10 | W 9 | W 8 | E 12 |
| kJ | 4 | 4 | — | — | 3 | — | 10 | — | — | 3 | 2 | — | — | — | 4 | 2 | 13 | 5 | 12 |
Wind waves Height (m) Direction Period (s) | E 7 | E 7 | E 7 | ESE 7 | ESE 8 | ESE 8 | SE 8 | ESE 7 | SE 7 | SE 8 | SSE 8 | SE 7 | SSE 8 | S 9 | SSE 9 | SSE 9 | SE 5 | SE 5 | ESE 6 |
| kJ | 123 | 177 | 220 | 237 | 176 | 161 | 229 | 142 | 258 | 811 | 488 | 262 | 597 | 1087 | 802 | 739 | 69 | 67 | 87 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 12 | 754 | 858 | 613 | 621 | 621 | 13 | 613 | 13 | 621 | 13 | 621 | 613 | 647 | 613 | 613 | 631 | 647 | 621 |
Best forecast wave conditions in Okinawa | |||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||
Header Global | |||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
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.
Nearest