Surf Forecasts:
Tengan surf forecast from 23 Aug 2026:
- Most powerful swell: Tuesday 25 Aug, 6PM (local time) - 11ft (3.5m), 16s period, E swell with 6,469 kJ wave energy.
Best Forecast Surf Conditions for Tengan this week:
The most powerful waves expected at Tengan in the next 16 days are 3.5m 16s and forecast to arrive on Tuesday (Aug 25) at 6PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 4.5m 8s period and expected on Wednesday (Aug 26) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 6PM (Tue 25th Aug) | 11ft (3.5m) 16s |
Table - best surf conditions forecast for Tengan over the next 16 days.
The Lowdown
Alright, this is Rusty, and I have to be straight with you. Looking at Tengan over the next couple of weeks, it’s a pretty bleak picture, to be honest. We’re looking at a long dry spell with almost nothing to get excited about for a solid stretch. Most of the time, the wind is just wrong, blowing onshore or cross-onshore, and even when there’s a bit of size in the water, the conditions are just poor. It’s one of those frustrating periods where the swell and the wind never seem to line up.
Let’s walk through it. Starting Sunday the 23rd of August into the following week, we’ve got tiny, weak swell coming from the ESE, with energy barely registering, and it’s blowing onshore at 12 mph. It’s not even worth paddling out. That situation drags on. Through Monday and Tuesday the 24th and 25th, the combined energy starts climbing, hitting a massive level on Tuesday afternoon, but the wind is a fresh cross-shore from the north at 22 mph, and the sea state is described as lumpy cross-chop. There's a 10 ft swell on Tuesday morning, but with that wind texture, it’s just a mess. Wednesday the 26th morning shows a wild 43 mph offshore westerly, but at 8 ft with a short 10-second period, it’s gale force and nearly impossible to paddle into. Later that day, it swings around to a cross-offshore, but the wind is still 37 mph. That’s a big no from me.
The rest of that first week and into the next is a repeat of onshore and cross-onshore winds with messy, choppy surf. Thursday the 3rd of September sees a huge spike in energy with a 21 ft swell from the NNE, but that’s coming with a 37 mph near-gale cross-shore wind and crossing waves. Those conditions are dangerous and unruly, completely unsurfable. Even when we get to the 4th and 5th of September, the wind shifts to a cross-offshore from the NNW, and the surf finally looks cleaner, but the swell is still sizeable at 8 ft to 11 ft, and the wind is blowing 22 to 34 mph. The energy readings for the 5th of September morning are moderate, but with a strong breeze, it’s still a tough, marginal call.
For the absolute best of a bad bunch, it has to be the morning of Saturday the 5th of September. Even then, it’s only a 2 out of 10, but the conditions are described as clean with a cross-offshore wind from the northwest at 22 mph. The swell is 8 ft from the NW with an 11-second period, which is a solid groundswell. That long period makes for better shaped waves but can be a bit too straight for a beach break. However, with the wind direction being right, if you are an experienced surfer and you don’t mind a strong breeze making the paddle out tricky, there could be a few well-shaped set waves. That is the only window I’d even consider. The crowds at Tengan are described as ‘sometimes’, so you might not have to fight for one of those sets.
The water temperature here is 83°F, which is basically bang on average for this time of year, so you don't have to worry about a thick wetsuit.
Outside of that Saturday morning, the rest of the period is a write-off. There’s just not enough quality to make any other day a standout.
Stay patient, check the forecasts, and don't force a session in poor conditions.
Rusty.
Short Range ForecastHeavy rain (total 35mm), heaviest during Wed morning. Warm (max 29°C on Sun afternoon, min 27°C on Sun night). Winds increasing (light winds from the ESE on Sun night, gales from the WNW by Tue night). | Days 5-7 Weather SummaryHeavy rain (total 33mm), heaviest during Wed afternoon. Warm (max 29°C on Thu morning, min 27°C on Wed afternoon). Winds decreasing (gales from the SSW on Wed afternoon, light winds from the SE by Fri night). | |||||||||||||||||||
Sun 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | ||||||||||||||
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 13 | ESE 12 | ESE 16 | ESE 17 | ESE 17 | ESE 17 | E 16 | E 15 | NNE 10 | NW 9 | E 13 | SE 6 | SE 8 | ESE 8 | SE 7 | ESE 8 | ESE 8 | SE 8 | SE 8 | ESE 7 |
Wave Graph | ||||||||||||||||||||
17 | 30 | 220 | 336 | 1863 | 4409 | 5200 | 3601 | 1202 | 861 | 14 | 141 | 196 | 287 | 268 | 150 | 181 | 304 | 133 | 70 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | cross-on | cross | cross | cross-off | off | cross-off | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on |
High Tide | 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 | 6:24AM2.15m | 7:16PM2.11m | 6:59AM2.19m | 7:39PM2.15m | |||||||
Low Tide | 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 | 12:54PM0.29m | 1:06AM0.68m | 1:22PM0.30m | 1:38AM0.57m | |||||||
— | — | 6:03 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | |
6:58 | — | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — | |
mm | — | 2 | 2 | — | — | — | 2 | 9 | 20 | 12 | 7 | 4 | 1 | — | 1 | 2 | 2 | 4 | 2 | 1 |
Temp °C | 29 | 27 | 28 | 29 | 27 | 29 | 29 | 28 | 28 | 27 | 28 | 29 | 28 | 28 | 29 | 29 | 28 | 28 | 29 | 28 |
Feels °C | 31 | 29 | 31 | 31 | 30 | 30 | 29 | 25 | 21 | 21 | 26 | 28 | 27 | 28 | 31 | 31 | 31 | 30 | 30 | 30 |
Swell 1 Height (m) Direction Period (s) | SW 10 | SW 9 | SW 9 | ESE 14 | ESE 17 | ESE 17 | E 16 | E 15 | NNE 10 | NW 9 | W 9 | SW 10 | SW 11 | SW 12 | SW 11 | SW 10 | SSW 10 | SW 11 | SW 10 | SW 9 |
309 | 162 | 125 | 236 | 1863 | 4409 | 5200 | 3601 | 1202 | 861 | 407 | 968 | 1402 | 1463 | 738 | 416 | 504 | 458 | 286 | 101 | |
Swell 2 Height (m) Direction Period (s) | ESE 13 | ESE 12 | ESE 16 | ESE 17 | SW 9 | SW 9 | SW 9 | SW 9 | E 11 | E 10 | SW 8 | E 13 | E 13 | E 12 | E 12 | E 9 | E 13 | ENE 13 | ENE 13 | S 9 |
17 | 30 | 220 | 336 | 50 | 50 | 27 | 27 | 155 | 52 | 205 | 13 | 13 | 12 | 11 | 15 | 14 | 17 | 17 | 57 | |
Swell 3 Height (m) Direction Period (s) | E 9 | E 10 | SE 9 | SW 9 | ENE 10 | — | — | — | SE 10 | E 14 | E 13 | — | E 18 | E 16 | E 12 | E 15 | SSE 8 | — | SSW 10 | ENE 12 |
6 | 7 | 3 | 81 | 10 | — | — | — | 4 | 16 | 14 | — | 6 | 5 | 11 | 17 | 23 | — | 52 | 15 | |
Wind waves Height (m) Direction Period (s) | ESE 3 | ESE 4 | E 11 | E 6 | ENE 7 | NNE 5 | NNE 6 | N 8 | WNW 8 | WSW 8 | SSE 8 | SE 6 | SE 8 | ESE 8 | SE 7 | ESE 8 | ESE 8 | SE 8 | SE 8 | ESE 7 |
4 | 14 | 85 | 38 | 36 | 48 | 154 | 1871 | 2713 | 1546 | 746 | 141 | 196 | 287 | 268 | 150 | 181 | 304 | 133 | 70 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 13 | 13 | 13 | 13 | 12 | 647 | 647 | 621 | 621 | 621 | 635 | 732 | 745 | 13 | 13 | 647 | 647 | 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.











