Surf Forecasts:
Tengan surf forecast from 29 Aug 2026:
- Most powerful swell: Wednesday 2 Sep, 12AM (local time) - 10ft (3.0m), 9s period, ESE swell with 1,351 kJ wave energy.
Best Forecast Surf Conditions for Tengan this week:
The most powerful waves expected at Tengan in the next 16 days are 3.0m 9s and forecast to arrive on Wednesday (Sep 02) at 12AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 10s period and expected on Friday (Sep 04) at 3PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 12AM (Wed 2nd Sep) | 10ft (3.0m) 9s |
Table - best surf conditions forecast for Tengan over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s take a good look at what we’ve got on the table for Tengan. I gotta be straight with you, the 16-day window is a tough read. Every single entry for the whole period is marked with poor surf conditions, so we’re not talking about a day to paddle out. The overall pattern is flat, messy, or blown out, and there are no standout sessions whatsoever. From now through Sunday, September 13th, it’s a long, frustrating run. The first days (August 29th through 31st) offer no real surf, just small, choppy junk with cross-onshore winds. Then we hit a stormy patch early September with strong winds and building swell, but it’s all raw, onshore, and blown to pieces. Even when the swell gets up to 8ft on the 2nd, the wind is a cross-onshore mess (combined energy 951). The whole thing is a no-go.
Given the blank run, let’s use a bit of local knowledge here. Tengan is a reef break, beginner-friendly, but inconsistent. It's in the Big Island region. For what it’s worth, the water temp is sitting at 83°F, which is about average for this time of year, so at least the bath is warm while you watch the chop.
That brief window around the 4th and 5th of September sees the swell drop right down to 3ft to 3ft from the east, with a period of 9 to 11 seconds. The wind is a lighter cross-onshore, but the energy is weak (under 300). A keen observer might see some tiny, crumbly waves but nothing worth a paddle. The 6th of September morning shows a bump in swell to 7ft from the east with a light cross-onshore breeze, but combined energy of 627 still means it’s going to be lumpy and poorly shaped.
Later in the second week, around the 11th and 12th, the swell cranks up to 10ft, but it's coming with a near-gale wind (34 mph) straight onshore. The energy numbers get huge (over 1,000), but the wind and weather make it pure survival, not surfing. That massive swell with such short period (8 seconds) and howling onshore wind would be more interesting for a kite surfer than someone with a longboard.
Truth is, the best this spot offers is a hope that a change in the wind direction will turn one of these swells clean. For now, the pickings are slim to none. So, we wait.
Rusty.
Short Range ForecastModerate rain (total 10mm), heaviest on Mon afternoon. Warm (max 29°C on Sat morning, min 27°C on Sat night). Mainly strong winds. | Days 4-6 Weather SummaryHeavy rain (total 71mm), heaviest during Tue night. Warm (max 29°C on Thu morning, min 26°C on Tue night). Mainly strong winds. | ||||||||||||||||||||
Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | |||||||||||||||
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) | SE 7 | SE 7 | ESE 7 | ESE 7 | E 7 | ESE 9 | E 9 | E 9 | ESE 9 | ESE 9 | ESE 8 | ESE 9 | ESE 9 | E 9 | ENE 10 | E 11 | E 10 | E 10 | E 9 | E 10 | E 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 205 | 132 | 96 | 84 | 97 | 304 | 613 | 921 | 708 | 442 | 657 | 1351 | 951 | 580 | 1061 | 514 | 367 | 239 | 137 | 143 | 109 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | on | on | on | on | on | cross-on | cross-on | on | cross | cross-on | cross-on | cross | cross-on | cross-on | cross | cross | cross-on | cross-on |
High Tide | 7:39PM2.15m | 7:35AM2.18m | 8:04PM2.16m | 8:13AM2.12m | 8:29PM2.15m | 8:54AM2.02m | 8:56PM2.11m | 9:40AM1.89m | 9:26PM2.04m | 10:34AM1.74m | 10:03PM1.96m | 11:49AM1.60m | 10:53PM1.85m | ||||||||
Low Tide | 1:22PM0.30m | 1:38AM0.57m | 1:49PM0.37m | 2:12AM0.50m | 2:18PM0.49m | 2:47AM0.45m | 2:48PM0.65m | 3:26AM0.45m | 3:21PM0.83m | 4:12AM0.50m | 3:57PM1.02m | 5:10AM0.57m | 4:47PM1.22m | ||||||||
 | |  | | |  |  | |  | | | | |  | | | | | | | | |
 | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — |
 | — | 6:52 | — | — | 6:51 | — | — | 6:50 | — | — | 6:49 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — |
mm | — | — | — | — | — | 1 | 2 | 3 | 4 | 2 | 4 | 36 | 5 | 10 | 8 | 2 | — | 4 | 2 | 2 | — |
Temp °C | 29 | 29 | 28 | 28 | 28 | 27 | 28 | 28 | 28 | 28 | 28 | 27 | 28 | 28 | 28 | 29 | 29 | 28 | 29 | 29 | 28 |
Feels °C | 31 | 31 | 30 | 29 | 29 | 27 | 27 | 27 | 29 | 26 | 28 | 29 | 28 | 30 | 28 | 29 | 30 | 30 | 32 | 32 | 33 |
Swell 1 Height (m) Direction Period (s) | SSW 9 | SW 9 | SSW 9 | S 9 | SSW 9 | S 8 | SSW 9 | S 10 | SSW 9 | SW 10 | S 9 | SSW 10 | SSW 10 | SW 11 | ESE 12 | E 11 | E 10 | E 10 | SSW 10 | SSW 10 | SSW 10 |
| kJ | 108 | 118 | 121 | 57 | 62 | 36 | 27 | 46 | 25 | 96 | 246 | 318 | 208 | 237 | 280 | 514 | 367 | 239 | 324 | 370 | 245 |
Swell 2 Height (m) Direction Period (s) | W 8 | W 8 | ENE 12 | SW 9 | SW 8 | SW 8 | SW 9 | SW 9 | SW 10 | S 9 | SW 10 | — | S 10 | S 10 | SW 11 | SW 10 | SSW 10 | S 10 | E 9 | E 10 | E 9 |
| kJ | 33 | 20 | 15 | 46 | 25 | 25 | 29 | 14 | 24 | 61 | 35 | — | 92 | 98 | 224 | 167 | 286 | 158 | 137 | 143 | 109 |
Swell 3 Height (m) Direction Period (s) | ENE 13 | ENE 13 | W 7 | ENE 12 | ENE 12 | ENE 11 | — | — | SW 10 | NNE 6 | — | — | — | E 12 | S 11 | NNE 7 | N 7 | SW 11 | N 10 | N 9 | N 11 |
| kJ | 17 | 17 | 4 | 14 | 14 | 13 | — | — | 15 | 6 | — | — | — | 12 | 151 | 69 | 39 | 191 | 45 | 52 | 79 |
Wind waves Height (m) Direction Period (s) | SE 7 | SE 7 | ESE 7 | ESE 7 | E 7 | ESE 9 | E 9 | E 9 | ESE 9 | ESE 9 | ESE 8 | ESE 9 | ESE 9 | E 9 | ENE 10 | — | — | — | ESE 3 | — | — |
| kJ | 205 | 132 | 96 | 84 | 97 | 304 | 613 | 921 | 708 | 442 | 657 | 1351 | 951 | 580 | 1061 | — | — | — | 1 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 13 | 13 | 13 | 13 | 13 | 633 | 647 | 621 | 621 | 621 | 745 | 621 | 613 | 621 | 621 | 621 | 621 | 613 | 12 | 10 | 10 |
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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