Surf Forecasts:
Tengan surf forecast from 25 Aug 2026:
- Most powerful swell: Tuesday 25 Aug, 3PM (local time) - 11ft (3.5m), 16s period, E swell with 6,016 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 3PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.5m 10s period and expected on Thursday (Aug 27) at 12PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 3PM (Tue 25th Aug) | 11ft (3.5m) 16s |
Table - best surf conditions forecast for Tengan over the next 16 days.
The Lowdown
Alright crew, Rusty here. Let’s break down what Tengan’s got cooking for us.
First up, the ocean is angry early on. Tuesday the 25th of August we get a big groundswell from the ESE at 12ft with a long 17-second period. The water energy is massive (combined energy 6310), and the water temp is 84°, which is about average. But a fresh 19 mph cross-shore from the north is gonna chop it all up. Lumpy out there.
Wednesday the 26th gets even worse – near gale force winds, swell drops and turns short and mushy. By Thursday the 27th we’ve got nothing but tiny 1ft leftovers and onshore slop. That kicks off a dry spell that runs from the 27th of August all the way through the 1st of September. Five days of flatness and garbage wind.
Now, there is one monster window. On the 2nd of September, Wednesday morning, a 15ft ESE swell with a 12-second period roars in. Energy is sky-high at 5734. The wind is cross-off from the WNW at a gale-force 40 mph. The surface will be clean, but that’s a full-on survival session for experts only. By the afternoon it’s 16ft with a 34 mph offshore. That is not paddle surfing – that’s big wave gear and kite territory.
After that, it’s dead. From the 3rd of September onward, we’re looking at flat conditions with 0.7ft to 2ft waves at best. A few clean offshore mornings come through, but there’s no swell to ride.
Honestly, the only real standout is that wild session on the 2nd of September for the brave and the crazy. Tengan is an inconsistent reef, and this kind of long gap between decent waves is just how it goes here. Stay hopeful, but don’t hold your breath.
Rusty.
Short Range ForecastHeavy rain (total 31mm), heaviest during Tue night. Warm (max 29°C on Tue morning, min 27°C on Tue night). Winds decreasing (gales from the WNW on Tue night, moderate winds from the SSE by Thu afternoon). | Days 4-6 Weather SummarySome drizzle, heaviest during Fri morning. Warm (max 29°C on Fri morning, min 27°C on Fri night). Mainly fresh winds. | ||||||||||||||||||||
Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | |||||||||||||||
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) | ESE 17 | E 16 | NNW 9 | NNW 10 | NW 9 | E 13 | E 13 | E 13 | SE 6 | SE 7 | SE 7 | SE 8 | SE 8 | SE 7 | SE 6 | ENE 12 | ESE 6 | E 6 | ESE 7 | ESE 10 | ESE 12 |
Wave Graph  | |||||||||||||||||||||
 kJ | 6224 | 6016 | 2356 | 1820 | 1099 | 31 | 30 | 28 | 119 | 262 | 309 | 755 | 196 | 147 | 53 | 28 | 18 | 24 | 18 | 160 | 446 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | off | cross-off | cross-off | cross-off | cross | cross | cross-on | cross-on | cross-on | cross-on | on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 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 | 7:35AM2.18m | 8:04PM2.16m | 8:13AM2.12m | 8:29PM2.15m | ||||||||
Low Tide | 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 | 1:49PM0.37m | 2:12AM0.50m | 2:18PM0.49m | 2:47AM0.45m | |||||||
 |  |  | | |  |  | | | |  |  | | | | | | | | | | |
 | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — |
 | — | 6:55 | — | — | 6:54 | — | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:50 | — |
mm | — | 6 | 14 | 5 | 4 | — | — | 2 | — | 1 | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 29 | 28 | 28 | 28 | 29 | 28 | 29 | 29 | 28 | 29 | 29 | 28 | 29 | 29 | 28 | 29 | 29 | 27 | 29 | 28 | 28 |
Feels °C | 30 | 26 | 23 | 25 | 28 | 27 | 29 | 30 | 29 | 29 | 29 | 29 | 30 | 30 | 30 | 30 | 30 | 27 | 28 | 27 | 27 |
Swell 1 Height (m) Direction Period (s) | ESE 17 | E 16 | E 13 | NNW 10 | NW 9 | WNW 10 | W 10 | WSW 11 | W 11 | W 11 | W 10 | SW 10 | SSW 10 | SW 10 | SW 9 | SSW 9 | SW 9 | S 9 | S 9 | ESE 10 | ESE 12 |
| kJ | 6224 | 6016 | 503 | 1820 | 1099 | 1691 | 1258 | 2500 | 1512 | 584 | 270 | 188 | 327 | 269 | 117 | 154 | 91 | 59 | 41 | 160 | 446 |
Swell 2 Height (m) Direction Period (s) | SW 9 | SW 9 | ENE 12 | E 10 | E 9 | ESE 8 | ESE 7 | E 7 | SW 9 | SSW 9 | SW 9 | W 10 | W 9 | W 8 | S 10 | ENE 12 | S 9 | SW 9 | SW 10 | SW 10 | SSW 10 |
| kJ | 50 | 27 | 371 | 75 | 27 | 22 | 11 | 9 | 77 | 141 | 125 | 68 | 41 | 12 | 90 | 28 | 42 | 41 | 47 | 34 | 64 |
Swell 3 Height (m) Direction Period (s) | — | — | E 12 | ESE 11 | E 14 | E 13 | E 13 | E 13 | E 12 | E 12 | E 15 | E 13 | ENE 13 | E 13 | ENE 12 | SE 10 | ENE 12 | ENE 11 | ESE 7 | SSW 9 | E 11 |
| kJ | — | — | 411 | 12 | 16 | 31 | 30 | 28 | 11 | 11 | 17 | 14 | 17 | 30 | 30 | 4 | 14 | 13 | 18 | 25 | 2 |
Wind waves Height (m) Direction Period (s) | NNE 5 | N 6 | NNW 9 | WSW 7 | SW 7 | SSW 7 | SSW 8 | SE 8 | SE 6 | SE 7 | SE 7 | SE 8 | SE 8 | SE 7 | SE 6 | ESE 6 | ESE 6 | E 6 | ENE 3 | — | NE 4 |
| kJ | 86 | 379 | 2356 | 687 | 420 | 531 | 619 | 11 | 119 | 262 | 309 | 755 | 196 | 147 | 53 | 11 | 18 | 24 | 1 | — | 26 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 633 | 621 | 621 | 621 | 621 | 613 | 621 | 613 | 631 | 613 | 840 | 10 | 13 | 13 | 13 | 12 | 12 | 12 | 732 | 772 | 621 |
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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