Surf Forecasts:
Tengan surf forecast from 12 Aug 2026:
- Most powerful swell: Tuesday 18 Aug, 12PM (local time) - 2.5ft (0.8m), 10s period, E swell with 121 kJ wave energy.
Best Forecast Surf Conditions for Tengan this week:
The most powerful waves expected at Tengan in the next 16 days are 0.8m 10s and forecast to arrive on Tuesday (Aug 18) at 12PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 9s period and expected on Friday (Aug 14) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 12PM (Tue 18th Aug) | 2.5ft (0.8m) 10s |
Table - best surf conditions forecast for Tengan over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s be straight with you – this outlook for Tengan is a tough one. We’re looking at a long 16-day window, but the honest truth is, there’s not a single day in that whole stretch that’s worth paddling out for. The swell is tiny, the wind is generally messy, and the overall energy just isn't there. It’s a blank run, which can happen in this area, but it’s still a bummer to report.
Let’s break it down. Starting from Wednesday the 12th of August, we’ve got a tiny 1ft swell from the ENE with a period of 11 seconds. The combined energy is a weak 40, and it’s coming with a risk of thunderstorms and cross-offshore wind. The water temp is a warm 84°F, which is about normal for the time of year, but that’s the only decent thing about it. The surf is just poor.
Thursday the 13th offers a glassy morning with a 2ft N swell, but the period drops to 8 seconds and the energy is a paltry 28. Still poor. Through the rest of that week and into the next, we see waves that never crack 2ft. The wind is mostly cross-onshore or onshore, often from the ESE or SE, and it gets gusty. By Monday the 17th, we get a brief 2ft spike from the ESE with a short period of 5 seconds, but it’s blown out by a 15 mph onshore wind. The combined energy climbs to 48, but it’s a windswell mess.
The only tiny blip in the whole run comes on Thursday the 20th of August. The afternoon shows a 3ft swell from the SE with a period of 9 seconds, and the combined energy finally hits a moderate 123. But the wind is howling from the SSE at 19 mph, making it a fresh cross-onshore, lumpy mess. The surf quality is still rated as poor. That’s as close to a pulse as we get, but it’s completely unrideable.
The rest of the second week is even smaller. From the 21st of August onward, we’re scraping along with 0.7ft to 1ft swells, mostly from the ESE or SE, with periods that go from 6 seconds up to 12 seconds. The wind stays strong, often 16-22 mph, and onshore. The combined energy rarely gets above 30. Honestly, this setup is more interesting for a kite surfer than a paddle surfer. There’s just no quality to be found.
So, for Tengan, it’s a hard pass. Conditions are poor across the board. Sometimes it stays this flat and windy for a while, but forecasts can change, so keep an eye out. For now, leave the board in the car.
Rusty.
Short Range ForecastHeavy rain (total 28mm), heaviest during Wed morning. Warm (max 29°C on Thu morning, min 25°C on Wed afternoon). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 3mm), mostly falling on Sun afternoon. Warm (max 29°C on Sat morning, min 27°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | |||||||||||||||
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 11 | N 8 | N 8 | N 7 | N 8 | N 7 | N 6 | SW 8 | ENE 11 | ENE 11 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ESE 5 | ENE 10 | ENE 10 | ENE 10 | E 4 | E 5 |
Wave Graph  | |||||||||||||||||||||
 kJ | 40 | 39 | 22 | 28 | 15 | 21 | 15 | 7 | 0 | 23 | 23 | 20 | 20 | 20 | 19 | 25 | 19 | 20 | 20 | 23 | 25 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | on | cross-on | glassy | glassy | glassy | off | off | cross-off | cross-on | cross-on | on | cross-on | cross-on | cross-on | on | on | on | on | on | on |
High Tide | 7:07PM2.13m | 6:32AM2.26m | 7:41PM2.16m | 7:17AM2.27m | 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 | ||||||||
Low Tide | 12:32PM0.12m | 00:45AM0.90m | 1:12PM0.12m | 1:25AM0.78m | 1:49PM0.19m | 2:04AM0.69m | 2:22PM0.31m | 2:42AM0.63m | 2:52PM0.48m | 3:19AM0.60m | 3:21PM0.66m | 3:57AM0.62m | 3:48PM0.85m | ||||||||
 |  |  |  |  |  | | | |  | |  | | | | | | | | | | |
 | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:01 | — | — |
 | — | 7:07 | — | — | 7:07 | — | — | 7:06 | — | — | 7:05 | — | — | 7:04 | — | — | 7:04 | — | — | 7:02 | — |
mm | 7 | 5 | 5 | — | 2 | 4 | 3 | 1 | 1 | — | — | — | — | 1 | 2 | — | — | — | — | — | — |
Temp °C | 27 | 26 | 27 | 29 | 29 | 28 | 28 | 28 | 27 | 29 | 29 | 28 | 29 | 29 | 27 | 28 | 28 | 27 | 29 | 29 | 27 |
Feels °C | 32 | 30 | 32 | 34 | 34 | 33 | 31 | 31 | 32 | 32 | 32 | 32 | 33 | 32 | 29 | 29 | 29 | 28 | 30 | 30 | 28 |
Swell 1 Height (m) Direction Period (s) | SW 9 | SW 9 | S 8 | SW 8 | SW 8 | SW 8 | SSW 9 | SSW 8 | SW 8 | SW 8 | SW 9 | SSW 9 | SSW 9 | SSW 8 | SW 9 | SW 9 | SW 9 | SW 9 | SW 9 | SSW 8 | SW 9 |
| kJ | 117 | 73 | 69 | 54 | 84 | 57 | 106 | 78 | 28 | 42 | 77 | 121 | 96 | 92 | 93 | 115 | 81 | 75 | 61 | 47 | 38 |
Swell 2 Height (m) Direction Period (s) | S 9 | S 9 | SW 9 | S 9 | S 8 | S 9 | N 7 | W 7 | WNW 5 | S 8 | ENE 11 | ENE 10 | ENE 5 | E 5 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 |
| kJ | 78 | 53 | 46 | 53 | 33 | 40 | 15 | 14 | 7 | 32 | 23 | 20 | 10 | 5 | 19 | 19 | 19 | 19 | 19 | 19 | 19 |
Swell 3 Height (m) Direction Period (s) | ENE 11 | ENE 11 | N 8 | N 8 | N 7 | N 8 | W 7 | N 6 | S 8 | ENE 11 | W 7 | E 5 | ENE 10 | ENE 10 | S 8 | SE 11 | S 7 | ESE 11 | SE 10 | SE 10 | SE 10 |
| kJ | 40 | 39 | 22 | 28 | 15 | 21 | 8 | 7 | 22 | 23 | 4 | 2 | 20 | 20 | 5 | 4 | 4 | 11 | 4 | 4 | 4 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | ENE 3 | — | — | ESE 5 | ESE 5 | ESE 4 | ESE 5 | ESE 5 | E 4 | E 5 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | 17 | 25 | 17 | 20 | 20 | 23 | 25 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 11 | 11 | 13 | 12 | 12 | 12 | 27 | 27 | 56 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 13 | 13 | 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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