
Surf Forecasts:
Tengan surf forecast from 13 Sep 2026:
- Most powerful swell: Sunday 20 Sep, 3AM (local time) - 5.5ft (1.7m), 16s period, E swell with 1,379 kJ wave energy.
Best Forecast Surf Conditions for Tengan this week:
The most powerful waves expected at Tengan in the next 16 days are 1.7m 16s and forecast to arrive on Sunday (Sep 20) 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 1.0m 4s period and expected on Saturday (Sep 19) at 3PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 3AM (Sun 20th Sep) | 5.5ft (1.7m) 16s |
Table - best surf conditions forecast for Tengan over the next 16 days.
The Lowdown
Text 2: Imperial Units
Alright folks, Rusty here. Let's be honest, the first week of this outlook for Tengan is a write-off. We've got tiny, weak, onshore junk from the 14th right through until the morning of the 19th. Swell heights are barely three feet with periods under 10 seconds, and the winds are all onshore or cross-onshore. The combined wave energy is mostly between 54 and 177, so it's all very weak and messy. Just not worth getting wet for.
Now, things get a little more interesting around Saturday the 19th afternoon. We see a jump in energy, but the wind is a strong cross-shore from the north at 16 mph, which isn't ideal. The swell is from the east with a period of 16 seconds. That's a long-period groundswell, which is promising for shape, but at a reef break like Tengan, that can also mean it's a bit more challenging. The water temperature is about average for the time of year.
The real standout, and it's the only one worth considering, is Sunday the 20th. The morning shows a building 6 ft east swell, but the real treat is the afternoon. We get a clean 6 ft east swell with a period of 14 seconds. The wind goes cross-offshore from the northwest at 22 mph. That's a proper offshore flow, which will groom the waves nicely. The combined wave energy jumps to a strong 1542. This is the best of the lot. It's still not perfect, but a clean, 6 ft reef wave with offshore wind is a solid session. Be aware it might be a bit big for the complete beginner.
The quality drops off again after that. Monday the 21st has a clean cross-offshore wind, but the swell is a mixed bag – a 4 ft east swell in the morning and a lumpy 8 ft northwest wind swell in the afternoon. By Wednesday the 23rd, the swell hits 10 ft from the north, but the wind is a cross-shore at 16 mph. That size is for experts only, and the cross-shore wind will make it a messy beast. The wave energy is 1465, so there's plenty of power, but the quality is marginal.
From Thursday the 24th onwards, it's back to the doldrums. Small, onshore and weak surf with energy readings dropping from 326 all the way down to 43 by the end. A long, quiet finish to the period.
So, to sum it up: wait for Sunday afternoon the 20th. That's your best shot at a clean, head-high reef wave. After that, it's a waiting game.
Rusty.
Short Range ForecastModerate rain (total 19mm), heaviest on Sun night. Warm (max 28°C on Mon afternoon, min 26°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 7mm), mostly falling on Wed night. Warm (max 28°C on Thu morning, min 26°C on Thu night). Wind will be generally light. | ||||||||||||||||||
Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | ||||||||||||||
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 8 | ESE 9 | E 9 | E 9 | E 9 | E 10 | E 10 | E 10 | NNW 7 | NNW 7 | E 9 | E 9 | E 9 | E 9 | ESE 9 | E 19 | E 16 | E 16 | E 16 |
Wave Graph | |||||||||||||||||||
85 | 77 | 74 | 78 | 81 | 90 | 87 | 90 | 68 | 61 | 61 | 42 | 39 | 39 | 25 | 116 | 427 | 1001 | 1258 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | cross-on | on | cross-on | cross-on | on | cross-on | cross-on | on | on | cross-on | cross-on | cross-on | cross | cross-on | cross | cross | cross |
High Tide | 8:20AM2.09m | 8:12PM2.15m | 8:57AM1.96m | 8:35PM2.09m | 9:35AM1.82m | 9:00PM2.00m | 10:17AM1.66m | 9:27PM1.88m | 11:15AM1.51m | 10:00PM1.75m | 1:24PM1.42m | 10:52PM1.61m | |||||||
Low Tide | 2:08AM0.39m | 2:13PM0.61m | 2:40AM0.38m | 2:40PM0.76m | 3:13AM0.43m | 3:06PM0.91m | 3:48AM0.53m | 3:34PM1.07m | 4:30AM0.66m | 4:06PM1.22m | 5:32AM0.80m | 5:04PM1.35m | |||||||
— | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:15 | — | — | |
6:36 | — | 6:35 | — | — | 6:34 | — | — | 6:31 | — | — | 6:30 | — | — | 6:30 | — | — | 6:29 | — | |
mm | 6 | — | 1 | 3 | 3 | 2 | 1 | 1 | 2 | 1 | 2 | 2 | — | 1 | 1 | — | — | — | — |
Temp °C | 27 | 27 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 |
Feels °C | 30 | 29 | 30 | 29 | 31 | 31 | 30 | 31 | 31 | 30 | 32 | 31 | 30 | 31 | 30 | 30 | 30 | 28 | 28 |
Swell 1 Height (m) Direction Period (s) | N 5 | ESE 9 | E 9 | E 9 | E 9 | E 10 | E 10 | NNW 6 | NNW 7 | NNW 7 | NNW 7 | E 9 | N 7 | N 7 | N 7 | E 8 | E 16 | E 16 | E 16 |
14 | 77 | 74 | 78 | 81 | 90 | 87 | 48 | 68 | 54 | 34 | 42 | 35 | 35 | 15 | 23 | 427 | 1001 | 1258 | |
Swell 2 Height (m) Direction Period (s) | E 13 | N 5 | N 5 | N 6 | NNW 6 | NNW 6 | NNW 6 | E 10 | E 9 | E 9 | E 9 | NNW 6 | E 9 | E 9 | ESE 9 | E 19 | E 8 | S 8 | S 8 |
32 | 8 | 4 | 10 | 22 | 19 | 27 | 90 | 62 | 61 | 61 | 20 | 39 | 39 | 25 | 116 | 21 | 5 | 5 | |
Swell 3 Height (m) Direction Period (s) | S 6 | E 13 | E 13 | E 13 | E 13 | SW 8 | SW 8 | ENE 14 | ENE 14 | ENE 14 | ENE 14 | ENE 13 | ENE 13 | ENE 12 | ENE 12 | N 10 | ENE 11 | — | — |
1 | 31 | 14 | 31 | 28 | 3 | 2 | 39 | 37 | 40 | 38 | 34 | 34 | 30 | 14 | 16 | 13 | — | — | |
Wind waves Height (m) Direction Period (s) | ESE 8 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | N 4 | N 8 | N 4 | N 5 |
85 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 10 | 44 | 35 | 77 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 28 | 28 | 12 | 10 | 12 | 12 | 10 | 12 | 12 | 10 | 10 | 13 | 12 | 12 | 13 | 23 | 621 | 647 | 621 |
Best forecast wave conditions in Okinawa | |||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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.










